阅读说明：本技术 具有输送系统的用于处理凸版板前体的装置和方法 (Apparatus and method for processing a relief plate precursor with a delivery system ) 是由 巴尔特·瓦特恩 于 2019-04-23 设计创作，主要内容包括：一种用于处理凸版板前体的装置(1000),优选地,装置(1000)使用液体处理凸版板前体,凸版板前体例如是印刷版前体(P),装置(1000)包括：输送系统(210、220、230),其具有至少一个输送杆(100),优选地,具有至少两个输送杆(100)；板联接工位(300),其配置为将凸版板前体联接至输送杆；处理室(400),其配置为用于处理凸版板前体；板分离工位(500),其配置为使处理后的凸版板前体与输送杆分离；其中,输送系统配置为在每个输送杆于板联接工位中联接至凸版板前体之后,自动地将每个输送杆从板联接工位穿过处理工位移动至板分离工位,并且在每个输送杆与处理后的凸版板前体分离之后,使每个输送杆从板分离工位返回至板联接工位,从而使输送杆以闭环方式移动通过装置。(An apparatus (1000) for processing a relief plate precursor, preferably a relief plate precursor such as a printing plate precursor (P), using a liquid, the apparatus (1000) comprising: a conveying system (210, 220, 230) having at least one conveying rod (100), preferably at least two conveying rods (100); a plate coupling station (300) configured to couple the relief plate precursor to the transfer bar; a processing chamber (400) configured for processing a relief plate precursor; a plate separation station (500) configured to separate the treated relief plate precursor from the transfer bar; wherein the transport system is configured to automatically move each transport bar through the processing station from the plate attachment station to the plate separation station after each transport bar is attached to the relief plate precursor in the plate attachment station, and to return each transport bar from the plate separation station to the plate attachment station after each transport bar is separated from the processed relief plate precursor, thereby moving the transport bars through the apparatus in a closed loop.)

1. An apparatus (1000) for processing a relief plate precursor, preferably a relief plate precursor such as a printing plate precursor (P), using a liquid, the apparatus (1000) comprising:

a conveying system (210, 220, 230) having at least one conveying rod (100), preferably at least two conveying rods (100);

a plate coupling station (300) configured to couple the relief plate precursor to the transfer bar (100);

a processing chamber (400) configured for processing the relief plate precursor;

a plate separation station (500) configured for separating the treated relief plate precursor from the transfer bar;

wherein the transport system (210, 220, 230) is configured to automatically move each transport bar (100) from the plate attachment station (300) through the processing station (400) to the plate separation station (500) after each transport bar (100) is attached to a relief plate precursor in the plate attachment station (300), and to return each transport bar (100) from the plate separation station (500) to the plate attachment station (300) after each transport bar (100) is separated from a processed relief plate precursor, such that the transport bars move through the apparatus in a closed loop manner.

2. The apparatus according to claim 1, wherein each transfer bar (100) is provided with at least one penetrating element (110), and wherein the plate joining station (300) is configured to engage at least one penetrating element in the vicinity of the edge of the relief plate precursor.

3. The apparatus according to claim 2, characterized in that each perforating element (100) has a sharp tip or edge (113) and the plate joining station (300) is configured such that at least one perforating element (110) at least partially penetrates or passes through the non-perforated area near the edge of the relief plate precursor.

4. The apparatus according to any of the preceding claims, wherein a plate ejection area (600) is provided between the outlet side (420) of the process chamber (400) and the plate separation station (500), such that a relief plate precursor is completely pulled out of the process chamber (400) into the plate ejection area (600) before being separated from the transport rods in the plate separation station (500).

5. The apparatus according to claim 4 wherein the transport system (210, 220, 230) is configured to move the transport bar from the outlet side (420) of the process chamber (400) through the plate ejection region (600) to the plate separation station (500) such that the relief plate precursor can be discharged in the plate ejection region after being separated from the transport bar.

6. The apparatus according to any of the preceding claims, further comprising a removal device (700), said removal device (700) being configured to remove processed relief plate precursor after separation of relief plate precursor from said transport bar in said plate separation station.

7. The apparatus according to claims 5 and 6, characterized in that the removal means (700) comprise any one or more of the following: a rack or cart configured to receive the processed relief plate precursor in the plate ejection area and configured to be removed from the plate ejection area; a robot; a motion belt; and at least one rotating drum.

8. The apparatus according to any of the preceding claims, wherein the transport system comprises a forward transport mechanism (210, 220), the forward transport mechanism (210, 220) being configured to transport the transport bar (100) with attached relief plate precursor at least from the inlet side (410) of the process chamber (400) to the outlet side (420) of the process chamber (400) and from the outlet side (420) to the plate separation station (500).

9. The apparatus of claim 8, wherein the delivery system further comprises a rod coupling (215), the rod coupling (215) configured to couple the delivery rod (100) with the relief plate precursor (P) coupled thereto to the forward transport mechanism (210, 220).

10. The apparatus according to claim 8 or 9, wherein the process chamber (400) has opposite first and second sides (430, 440), the first and second sides (430, 440) extending in a transport direction between the inlet side (410) and the outlet side (420); wherein the forward conveying mechanism comprises first and second forward conveying mechanisms (210, 220), the first and second forward conveying mechanisms (210, 220) extending at the first and second opposing sides of the process chamber, respectively; wherein the first and second forward conveying mechanisms are configured to be coupled to first and second ends (101, 102) of the conveyor bar, respectively, and to convey the conveyor bar from the inlet side (410) to the outlet side (420) while the first and second ends of the conveyor bar move along the first and second opposing sides (430, 440), respectively.

11. The device according to claim 10, wherein the first and/or second forward conveying mechanism (210, 220) comprises a first and/or second lead screw, and wherein the first end of the conveying rod and/or the second end of the conveying rod is provided with a first and/or second coupling portion (121, 122), the first and/or second coupling portion (121, 122) being configured to couple to the first and/or second lead screw, respectively.

12. The device according to claim 10, characterized in that the first and/or second forward conveying mechanism (210, 220) comprises: a first chain and/or a second chain, or a first belt and/or a second belt, or a first linear motor and/or a second linear motor, or a combination thereof, and wherein the first end of the transport bar and/or the second end of the transport bar is provided with a first coupling portion and/or a second coupling portion configured to couple to the first chain and/or the second chain, or the first belt and/or the second belt, or the first linear motor and/or the second linear motor, respectively.

13. The device according to any one of the preceding claims, wherein the transport system comprises a backward transport mechanism (230), the backward transport mechanism (230) being configured to transport the transport bar from the plate separating station (500) back to the plate coupling station (300).

14. The device according to claim 13, wherein the backward conveying mechanism (230) comprises any one of: one or more belts, one or more chains, one or more lead screws, linear motors, or a combination thereof.

15. The apparatus according to claim 13 or 14, wherein the backward conveying mechanism (230) is located around the process chamber (400), and wherein the conveying system (300) comprises an additional conveying mechanism (250), the additional conveying mechanism (250) being configured to move the separated conveying bars in the plate separating station (500) towards the backward conveying mechanism (230).

16. The device according to claim 15, wherein the additional transport mechanism (250) comprises any one or more of: magnetic devices, electromagnetic devices, clamping devices, vacuum devices, or combinations thereof.

17. The device according to any one of the preceding claims, in combination with claim 2, characterized in that the plate coupling station (300) comprises at least one driver connected to a hammer tool (310) for pushing at least one penetrating element (110) at least partially into the material of the relief plate precursor.

18. The apparatus according to any of the preceding claims, wherein the plate coupling station (300) comprises an alignment member (320), the alignment member (320) being configured to align a relief plate precursor relative to the transport bar.

19. The apparatus according to any of the preceding claims, in combination with claim 2, characterized in that the plate separation station (500) comprises at least one drive connected to a tool (510), the tool (510) being configured to push the relief plate precursor away from the transport bar such that the at least one penetrating element is removed from the relief plate precursor.

20. The device according to any one of the preceding claims, further comprising a control unit (800), the control unit (800) being configured to control the transport system such that at least two transport bars are moved through the device simultaneously.

21. The device according to any one of the preceding claims, in combination with claim 2, characterized in that the shape of said at least one perforating element (110) is selected from: a rod, blade, needle, or combination thereof having a cross-section, for example, circular, elliptical, triangular, rectangular, or polygonal.

22. The device according to any one of the preceding claims, wherein each penetrating element (110) comprises a penetrating portion (112), the penetrating portion (112) extending in a penetrating direction and having a length of between 1mm and 20 mm.

23. The device of any one of the preceding claims, wherein the length of the delivery rod is in the range of 100mm to 10000 mm.

24. A method for processing a relief plate precursor, such as a printing plate precursor, comprising the steps of:

a) coupling the relief plate precursor to a transfer bar in a plate coupling station of a processing apparatus,

b) a transport bar to which the relief plate precursor is attached is transported through a processing region of a processing apparatus,

c) the transfer bar is separated from the processed relief plate precursor in a plate separation station of the processing apparatus,

d) the separated conveyor bars are conveyed back to the plate joining station,

wherein steps a) to d) are performed automatically and such that a conveyor bar is moved in a closed loop manner from a plate joining station through the process area to the plate separating station and back again to the plate joining station.

25. Method according to the preceding claim, characterized in that at least two conveyor bars are conveyed simultaneously in the treatment device.

26. The method according to any of the preceding claims 24 to 25, wherein the conveying speed of step b) and step d) is different.

27. Method according to the preceding claim, characterized in that the ratio of the speed of step d) divided by the speed of step b) is in the range of 1 to 400, preferably in the range of 2 to 300.

28. The method according to any of the preceding claims 24 to 27, wherein the speed of step b) and step d) is in the range of 1 mm/sec to 1000 mm/sec.

29. The method according to any of the preceding claims 24 to 28, wherein the treatment in the treatment chamber is selected from the group consisting of: cleaning, brushing, rinsing, spraying, drying, irradiating, developing, heating, cooling, removing material, treating with a gas or liquid, grinding, cutting, treating with electromagnetic waves, and combinations thereof.

30. The method according to any of the preceding claims 24 to 29, characterized in that the treatment in the treatment chamber is a thermal treatment which results in a liquefied fraction of a relief plate precursor, which is then brought into contact with a moving receptor material, such as a web, a non-woven material or a foil, to which the molten material adheres and which is continuously removed together with the receptor material.

31. The method according to any one of the preceding claims 24 to 30 further comprising the step of performing a post-treatment on the relief plate precursor, the post-treatment being selected from cleaning, brushing, rinsing, spraying, drying, irradiating, developing, heating, cooling, removing material, treating with a gas or liquid, grinding, cutting, treating with electromagnetic waves, and combinations thereof.

32. The method according to any one of the preceding claims 24 to 30 further comprising the step of performing a pretreatment on the relief plate precursor, said pretreatment being selected from the group consisting of: cutting, ablating, exposing to electromagnetic radiation, and combinations thereof.

33. An apparatus (1000) for processing a relief plate precursor, preferably a relief plate precursor such as a printing plate precursor (P), using a liquid, the apparatus (1000) comprising:

a processing chamber (400) configured for processing the relief plate precursor while the relief plate precursor is delivered to couple with a delivery rod;

a plate separation station (500) configured for separating the treated relief plate precursor from the transfer bar;

a plate ejection chamber (600) located between the exit side (420) of the process chamber (400) and the plate separation station (500), the plate ejection chamber configured to allow relief plate precursor removed from the process chamber (400) to fall downwardly when the relief plate precursor is separated from the transfer bar in the separation station (500).

34. The apparatus according to any of the preceding claims, further comprising a removal device (700), said removal device (700) being configured to remove processed relief plate precursor after separation of relief plate precursor from said transport bar in said plate separation station.

35. The apparatus according to claim 33 or 34, wherein the removing means (700) comprises any one or more of: a rack or cart configured to receive the processed relief plate precursor in the plate ejection area and configured to be removed from the plate ejection area; a robot; a motion belt; and at least one rotating drum.

36. The apparatus according to any of claims 33 to 35, further comprising a transport system (210, 220, 230), said transport system (210, 220, 230) configured to move said transport rods through said processing station (400) to said plate separation station (500) after said transport rods are coupled to said relief plate precursor.

37. The apparatus according to the preceding claim, wherein the transport system (210, 220, 230) is configured to move the transport bar from the outlet side (420) of the process chamber (400) through the plate ejection chamber (600) to the plate separation station (500) such that the relief plate precursor can be discharged at the plate ejection chamber after being separated from the transport bar.

38. The apparatus of claim 36 or 37, further comprising:

a plate coupling station (300) configured to couple a relief plate precursor to be processed to the transfer bar (100);

wherein the delivery system (210, 220, 230) is configured to: moving the transfer bar (100) from the plate attachment station (300) through the processing station (400) to the plate separation station (500) after the transfer bar is attached to a relief plate precursor in the plate attachment station (300), and returning the transfer bar from the plate separation station (500) to the plate attachment station (300) after the transfer bar is separated from the processed relief plate precursor.

39. The apparatus according to the preceding claim, wherein each transfer bar (100) is provided with at least one perforating element (110), and wherein the plate joining station (300) is configured to engage at least one perforating element in the vicinity of the edge of the relief plate precursor.

40. The apparatus according to the preceding claim, characterized in that each perforating element (100) has a sharp tip or edge (113) and in that the plate coupling station (300) is configured so that at least one perforating element (110) penetrates at least partially into the non-perforated area near the edge of the relief plate precursor.

41. A method (1000) of treating a relief plate precursor (P), preferably the method (1000) uses a liquid to treat a relief plate precursor (P), such as a printing plate precursor, the method (1000) comprising:

processing the relief plate precursor in a processing zone while the relief plate precursor is delivered to couple with a delivery rod;

moving the transfer bar with the relief plate precursor coupled thereto out of the processing region and into a plate ejection region (600);

separating the treated relief plate precursor in the plate ejection region from the delivery shaft while allowing the relief plate precursor to fall downwardly in the plate collection region.

Technical Field

The field of the invention relates to apparatus and methods for preparing and/or processing relief plate precursors, and in particular to apparatus and methods for preparing and/or processing printing plate precursors.

Background

Cleaning devices for printing plate precursors are known. Typically, a transfer bar is used to move the printing plate precursor through such a cleaning device. For this purpose, the area of the printing plate precursor is provided with a series of through holes in the perforating station. Next, the operator couples the pre-perforated printing plate precursor to a conveyor bar having a plurality of pins that may extend in holes of the printing plate. The operator then brings the conveyor bar with the coupling plate to the inlet side of the cleaning device. The transport bar leaves the cleaning device on the outlet side, where it is recovered by an operator who separates the transport bar from the printing plate precursor. These steps are repeated to clean the next printing plate precursor. A disadvantage of the known device and method is that a considerable amount of manual operation is required, which results in a rather slow process. Furthermore, a separate perforating station is required where material is removed from the printing plate precursor, which generates waste.

Such a cleaning device is disclosed in document US 2018/0217502. The conveyor belt is attached to the flexographic printing element. For this purpose, the flexographic printing element is first perforated and then the pins of the conveyor belt are arranged in these perforations.

Disclosure of Invention

It is an aim of embodiments of the present invention to provide apparatus and methods for preparing and/or processing printing plate precursors which allow the number of manual interventions required to be reduced, and preferably the amount of waste generated to be reduced.

According to one aspect of the invention there is provided an apparatus for treating a relief plate precursor, preferably a printing plate precursor, such as a printing plate precursor, using a liquid. The apparatus comprises a transport system having at least one transport rod, preferably at least two transport rods; a plate coupling station configured to couple a relief plate precursor to the transfer bar; a processing chamber configured to process the relief plate precursor, preferably with a liquid; and a plate separation station configured for separating the treated relief plate precursor from the transfer bar. The transport system is configured to automatically move each transport bar through the processing station from the plate attachment station to the plate separation station after each transport bar is attached to the relief plate precursor in the plate attachment station, and to return each transport bar plate from the plate separation station to the plate attachment station after each transport bar is separated from the processed relief plate precursor, such that the transport bars move through the apparatus in a closed loop.

In other words, using the device of the invention, one or more conveyor bars can be automatically circulated in the device. The operator can bring the relief plate precursor to be processed to the plate joining station, and then automatically perform joining, processing and separation, and then the transfer bar automatically returns to the plate joining station. In this way, the operator does not need to disengage or return the conveyor bar. This reduces the number of manual interactions required.

According to a preferred embodiment, each transfer bar is provided with at least one penetrating element, and the plate joining station is configured to engage the at least one penetrating element in an area near an edge of the relief plate precursor. More specifically, each penetrating element has a sharp tip or edge that is capable of causing a penetrating action in the material of the relief plate precursor, and the plate joining station is configured such that at least one penetrating element at least partially penetrates or passes through an unperforated region near the edge of the relief plate precursor. In this way, the penetrating element is pushed into the material of the printing plate without generating waste. However, it should be noted that the present invention also contemplates the use of a pre-perforated relief plate precursor that is coupled to the transfer bar in a plate coupling station.

According to a preferred embodiment, a plate ejection area is provided between the outlet side of the process chamber and the plate separation station, so that the relief plate precursor is completely pulled out of the process chamber into the plate ejection area before being separated from the conveyor bar in the plate separation station. Preferably, the transport system is configured to move the transport bar from the outlet side of the process chamber through the plate ejection region to the plate separation station such that the relief plate precursor can be discharged in the plate ejection region after separation from the transport bar. In this manner, after separation of the relief plate precursor, the relief plate precursor can be released into the plate ejection area.

According to a preferred embodiment, the apparatus further comprises a removal device configured to remove the treated relief plate precursor after the relief plate precursor is separated from the transport beam in the plate separation station. The removal means may comprise any one or more of: a rack or cart configured to receive processed relief plate precursor in the plate ejection area and configured to be removed from the plate ejection area; a robot; a motion belt; and at least one rotating drum. For example, a cart may be placed below the plate ejection area so that the separated relief plate precursor can be easily transported to another machine for further processing.

According to a preferred embodiment, the transport system comprises a forward transport mechanism configured to transport the transport bar with the relief plate precursor coupled thereto at least from an inlet side of the process chamber to an outlet side of the process chamber and from the outlet side to the plate separation station. Moreover, the transport system further includes a rod coupling configured to couple the transport rod to which the relief plate precursor is coupled to the forward transport mechanism. The forward feed mechanism may include a first forward feed mechanism and a second forward feed mechanism extending at opposing first and second sides of the process chamber, respectively. The first and second forward feed mechanisms are configured to be coupled to first and second ends of the feed bar, respectively, and configured to feed the feed bar from the inlet side to the outlet side while the first and second ends of the feed bar move along opposing first and second sides, respectively. The advantage of using two forward conveying mechanisms is that the conveying rods can be conveyed very stably through the process chamber. According to a preferred embodiment, the first and/or second forward transport mechanism comprises a first and/or second lead screw, and the first end of the transport rod and/or the second end of the transport rod is provided with a first and/or second coupling portion configured to couple to the first and/or second lead screw, respectively. For example, the first and second coupling portions may include teeth that fit within grooves of the lead screw. The use of a lead screw has the advantage of allowing a simple and robust coupling to and decoupling from the end of the conveyor bar.

According to another embodiment, the first forward conveying mechanism and/or the second forward conveying mechanism comprises: a first chain and/or a second chain, or a first belt and/or a second belt, or a first linear motor and/or a second linear motor, or a combination thereof; and the first end of the conveying bar and/or the second end of the conveying bar is provided with a first coupling portion and/or a second coupling portion configured to couple to the first chain and/or the second chain, or the first belt and/or the second belt, or the first linear motor and/or the second linear motor, respectively.

According to a preferred embodiment, the transport system further comprises a backward transport mechanism configured to transport the transport bar from the plate detachment station back to the plate attachment station. The backward conveying mechanism may include any one of: one or more belts, one or more chains, one or more lead screws, linear motors, or a combination thereof.

The backward conveying mechanism may be located around the process chamber, preferably partially above or below the process chamber, and the conveying system may comprise an additional conveying mechanism, preferably an upward or downward conveying mechanism, such as a lifting mechanism configured to move the separated conveying bars in the plate separating station upward or downward towards the backward conveying mechanism. Optionally, the backward conveying mechanism may be located at a side of the process chamber, and the conveying system may comprise a lateral conveying mechanism, wherein optionally the conveying rod is rotated from a horizontal to a vertical position. The upward or downward or lateral transport mechanism may comprise any one or more of the following: magnetic devices, electromagnetic devices, clamping devices, vacuum devices, or combinations thereof.

Preferably, the length of the forward conveying means is from 100mm to 10000mm, more preferably from 100mm to 5000 mm. Further, the distance between the first forward conveying mechanism and the second forward conveying mechanism may be 100mm to 10000mm, more preferably 1000mm to 5000 mm.

Alternatively, a disengagement mechanism may be provided that is configured to disengage the conveyor bar from the rearward conveyor mechanism and convey the conveyor bar to the plate coupling station. For example, the disengagement means may comprise a magnet and/or a lifting mechanism.

According to a preferred embodiment, the plate joining station comprises at least one driver connected to the hammer tool for pushing at least one penetrating element into the material of the relief plate precursor. The penetrating elements may be pushed at least partially into the relief plate precursor or, preferably, through the material such that the penetrating elements protrude from the relief plate precursor. In a possible embodiment, the hammer tool may be provided with an opening in which the at least one penetrating element may be received while the hammer tool is pushing against the relief plate precursor supported on the support. Such a hammer tool allows for clean penetration of the material of the relief plate precursor.

According to a preferred embodiment, the plate joining station comprises an alignment member configured for aligning the relief plate precursor relative to the transfer bar. The alignment member may comprise a movable element which projects through the conveyor bar at the alignment position and which moves away from the conveyor bar at the rest position. In this way, the relief plate precursor can be easily aligned over the at least one penetrating element before the hammer tool causes penetration of the relief plate precursor.

According to a preferred embodiment, the plate separation station comprises at least one drive connected to a tool configured to push the relief plate precursor off the transport bar such that the at least one penetrating element is removed from the relief plate precursor. For example, a piston, drive or motor may be used.

According to a preferred embodiment, the device further comprises a control unit configured to control the transport system, preferably such that at least two transport bars are moved through the device simultaneously. Of course, other components of the device may also be controlled by the same control unit or by different control units, such as coupling means and decoupling means. The control unit may be connected to any component of the device (e.g. motor, gear, sensor, pump, light source, switch) in order to obtain their status information and/or to control their action. The status information may be visual to the operator and may be stored electronically to enable recording and analysis of the data. In addition, the control unit may be capable of accepting commands from an operator and communicating those commands to the various components. The commands may be given as a single command or as a set of commands in a particular order, and the commands may be generated and stored electronically. The control unit may include: a computer or PLC (programmable logic controller); a screen or other device for visualization; a speaker and/or a microphone or other means for acoustic signals and communications. The computer may be connected to a converter that converts the digital computer signal into an analog or digital signal that can be read and understood by the component.

In one embodiment, one conveyor bar may be conveyed through the process chamber while at least one other conveyor bar is located at a different position. For example, at least one other transfer bar may be located at the joining station, the separating station, the backward transfer mechanism, or any other location. Preferably, when one of the at least two conveyor bars moves through the process chamber, the other conveyor bar moves back to the plate joining station. In this manner, subsequent relief plate precursors can be coupled to the delivery shaft while a previous relief plate precursor is processed. Further, the speed of conveyance may be controlled such that the conveyance speed in the backward conveyance direction may be greater than the conveyance speed in the forward conveyance direction. In this way, process time may be further reduced.

According to another embodiment, the device further comprises a delivery rod, wherein the shape of the at least one penetrating element is selected from the group consisting of: a rod, blade, needle, or combination thereof having a cross-section, for example, circular, elliptical, triangular, rectangular, or polygonal. Preferably, the penetrating element has a sharp symmetrical or asymmetrical tip or edge.

According to another embodiment, the apparatus further comprises a transport rod, wherein each penetrating element comprises a penetrating portion intended to penetrate or pass through the relief plate precursor substantially perpendicularly. There may be a case where the penetrating portion may be inclined, and preferably, the inclination is toward the conveying direction. In other words, there is an angle of 60 ° to 90 °, preferably 70 ° to 90 °, more preferably 80 ° to 90 °, between the plate surface and the penetration portion. Preferably, the length of the penetration portion, seen in the penetration direction, is in the range between 1mm and 20mm, preferably in the range between 2mm and 15 mm.

The penetrating element may be made of any hard material that can penetrate or pass through the plate precursor material. The penetrating element may be made of metal or alloy, ceramic, polymer, glass, or a combination thereof. Preferably, the penetrating element is made of metal or alloy.

The length of the delivery rod used in the claimed device is in the range of 100mm to 10000mm, preferably 200mm to 5000mm, more preferably 500mm to 3000 mm.

According to a second aspect, there is provided a method for processing a relief plate precursor, such as a printing plate precursor, comprising the steps of:

a) the relief plate precursor is coupled to the transfer bar in a plate coupling station of the processing apparatus,

b) a transport bar to which the relief plate precursor is attached is transported through a processing region of a processing apparatus,

c) the transfer bar is separated from the processed relief plate precursor in a plate separation station of the processing apparatus,

d) the separated conveying rods are conveyed back to the plate connecting station,

wherein steps a) to d) are performed automatically and the transport bar is moved in a closed loop from the plate joining station through the processing area to the plate separating station and back again to the plate joining station.

The advantages and considerations set forth above for the device apply mutatis mutandis to the method.

According to a preferred embodiment, at least two conveyor bars are conveyed simultaneously in the treatment device. Preferably, one of the at least two conveyor bars is transported through the treatment area while the other conveyor bar is transported back to the joining station. Other arrangements are possible, for example, one conveyor bar may be located within the processing region, while at least one other conveyor bar may be located at a separation station, within the back conveyor system, at a joining station, or somewhere in between. Furthermore, the conveying speeds of steps b) and d) may be different, wherein preferably the conveying speed of step d) is greater than the conveying speed of step b). More preferably, the ratio of the speed of step d) divided by the speed of step b) is in the range of 1 to 400, preferably in the range of 1 to 350, even more preferably in the range of 2 to 300. The speed of step b) may be in the range of 1 mm/min to 10000 mm/min, preferably in the range of 5 mm/min to 2000 mm/min, more preferably in the range of 10 mm/min to 1000 mm/min. The speed of step d) may be in the range of 1 to 10000 mm/s, preferably in the range of 5 to 5000 mm/s, more preferably in the range of 10 to 2000 mm/s. Such speeds and speed ratios allow further optimization of the process and increase the speed of the process. For example, the velocity in step b) may be increased once the trailing edge of the relief plate precursor leaves the processing region. This is preferred when processing full length precursors without a separation station.

According to a preferred embodiment, the treatment in the treatment chamber is selected from: cleaning, brushing, rinsing, spraying, drying, irradiating, developing, heating, cooling, removing material, treating with a gas or liquid, grinding, cutting, treating with electromagnetic waves, and combinations thereof.

According to one possible embodiment, the treatment in the treatment zone is a thermal treatment which results in a liquefied portion of the relief plate precursor, which is then brought into contact with a moving receptor material, such as a web, a non-woven material or a foil, to which the molten material adheres and which is continuously removed together with the receptor material. To heat the relief plate precursor, any method known to those skilled in the art can be used, such as heated rollers, hot gases or liquids, IR radiation, and combinations thereof. The receptor may be glass, ceramic, natural or artificial polymers, or a combination thereof.

According to an exemplary embodiment, the method further comprises the step of performing a post-treatment on the relief plate precursor, the post-treatment selected from the group consisting of cleaning, brushing, rinsing, spraying, drying, irradiating, developing, heating, cooling, removing material, treating with a gas or liquid, grinding, cutting, treating with electromagnetic waves, and combinations thereof.

According to an exemplary embodiment, the method further comprises the step of performing a pretreatment on the relief plate precursor, the pretreatment selected from the group consisting of: cutting, ablating, exposing to electromagnetic radiation, and combinations thereof.

According to a third aspect, there is provided an apparatus for treating a relief plate precursor, preferably using a liquid, the relief plate precursor, for example a printing plate precursor, the apparatus comprising a treatment chamber configured to treat the relief plate precursor, preferably using a liquid, while the relief plate precursor is being delivered into engagement with a delivery shaft; a plate separation station configured for separating the treated relief plate precursor from the transfer bar; a plate discharge chamber located between an outlet side of the process chamber and the plate separating station; the plate ejection chamber is configured to allow the relief plate precursor removed from the processing chamber to fall downwardly when the relief plate precursor is separated from the transfer bar at the separation station.

Such an arrangement allows for quick and easy separation of the relief plate precursor, wherein the relief plate precursor can automatically fall into the plate ejection chamber from a position where it can be removed.

According to a preferred embodiment, the apparatus further comprises a removal device configured to remove the treated relief plate precursor after the relief plate precursor is separated from the transport beam in the plate separation station. The removal means comprises any one or more of: a rack or cart configured to receive processed relief plate precursor in the plate ejection area and configured to be removed from the plate ejection area; a robot; a motion belt; and at least one rotating drum.

Preferably, the apparatus of the third aspect further comprises a transport system configured to move the transfer bar through the processing station to the plate separation station after the transfer bar is coupled to the relief plate precursor. The transport system may be configured to move the transport bar from the outlet side of the process chamber through the plate ejection chamber to the plate separation station such that the relief plate precursor can be discharged in the plate ejection chamber after being separated from the transport bar.

According to a preferred embodiment, the apparatus further comprises a plate coupling station configured to couple the relief plate precursor to be processed to the transfer bar. Wherein the transport system is configured to: after the transfer bar is coupled to the relief plate precursor in the plate coupling station, the transfer bar is moved from the plate coupling station through the processing station to a plate separation station, and after the transfer bar is separated from the processed relief plate precursor, the transfer bar is returned from the plate separation station to the plate coupling station.

The above description is valid for the coupling station, the conveying mechanism, the separating station, the conveying rod and the penetrating element attached to the conveying rod.

According to a fourth aspect, there is provided a method of treating a relief plate precursor, preferably a printing plate precursor such as a printing plate precursor, using a liquid, the method comprising: treating the relief plate precursor in a treatment zone, preferably with a liquid, while the relief plate precursor is transported to be coupled with the delivery rod; moving the transfer bar with the attached relief plate precursor out of the processing region and into a plate ejection region; the processed relief plate precursor in the plate ejection region is separated from the delivery stems while allowing the relief plate precursor to fall downwardly into the plate collection region. The plate collection area may simultaneously be a plate removal device, such as a cart or a shelf.

According to a fifth aspect, there is provided an apparatus for processing a relief plate precursor, such as a printing plate precursor (P) to be processed. The device includes: a delivery rod provided with at least one penetrating element, preferably a plurality of penetrating elements, more preferably at least one penetrating element having a sharp tip or edge; a plate coupling station configured to couple the relief plate precursor to the transfer bar by passing at least one penetrating element through an unperforated region near an edge of the relief plate precursor.

An advantage of this arrangement is that the relief plate precursor can be coupled to the transfer bar without generating waste, while allowing good coupling.

Preferably, the plate joining station comprises at least one driver connected to the hammer tool for pushing at least one penetrating element (preferably comprising a plurality of penetrating elements) into the material of the relief plate precursor. Also, the plate attachment station may include an alignment member configured to align the relief plate precursor relative to the transfer bar. The advantages and preferred embodiments of the present aspect may be as disclosed in connection with the first aspect.

Preferably, the transfer rod length is from 100mm to 10000mm, more preferably from 1000mm to 5000 mm.

According to a preferred embodiment, the shape of at least one perforating element is selected from: rod-like, blade-like, needle-like, or combinations thereof.

According to a preferred embodiment, each perforating element comprises a penetrating portion having a length, seen in the penetrating direction, in the range between 1mm and 20 mm. Preferably, the largest dimension of the penetration portion, viewed in a direction perpendicular to the penetration direction, is less than 5mm, more preferably less than 3 mm. For example, when the penetrating portion has a circular cross section, the diameter is preferably less than 5mm, more preferably less than 3 mm.

According to a preferred embodiment the length of the transport rod is in the range of 100mm to 10000 mm.

According to a sixth aspect, there is provided a method of delivering a relief plate precursor (P), preferably using a liquid, the method comprising: providing the delivery rod with at least one penetrating element, preferably a plurality of penetrating elements, more preferably at least one penetrating element having a sharp tip or edge; and causing at least one penetrating element to penetrate an unperforated region near an edge of the relief plate precursor, thereby coupling the relief plate precursor to the delivery beam.

Preferably, the method further comprises: the method includes moving a transfer bar to which the relief plate precursor is coupled through a processing region of a processing apparatus, and separating the transfer bar from the processed relief plate precursor in a plate separation station of the processing apparatus. Preferably, the coupling is done in a plate coupling station and the transfer bar is moved in a closed loop from the plate coupling station through the process area to a plate separating station and back again to the plate coupling station. Two, three or more conveyor bars may be conveyed simultaneously in the treatment device. For example, one of the at least two conveyor bars is transported through the processing area while the other conveyor bar is transported back to the joining station, as already explained in detail above.

Preferred features of one of these aspects may be added to the other aspects where possible.

Drawings

The drawings are intended to depict presently preferred, non-limiting, exemplary embodiments of the apparatus and method of the present invention. The above and other advantages of features and objects of the present invention will become more apparent and the invention will be better understood from the following detailed description when read in conjunction with the accompanying drawings, wherein:

fig. 1 is a schematic perspective view of an exemplary embodiment of an apparatus for processing a relief plate precursor.

FIG. 2 is a schematic perspective view of an exemplary embodiment of a transfer bar.

FIG. 2A is a detailed perspective view of a portion of the transfer bar of FIG. 2.

Fig. 3 is a schematic perspective view showing the relief plate precursor aligned with the transport bar of fig. 2.

Fig. 3A is a detail view from the other side of the arrangement of fig. 3.

Fig. 4A and 4B show the arrangement of fig. 3 when the hammer tool is moved downwardly in the direction of the relief plate precursor, wherein fig. 4B shows a state in which a plurality of penetrating elements of the transport rod extend through the area near the edge of the relief plate precursor.

Fig. 4C shows the arrangement of fig. 4B after removal of the hammer tool.

Fig. 5 shows a variant of the conveyor bar of fig. 2.

Fig. 6A and 6B illustrate another exemplary embodiment of a transfer bar before and after a relief plate precursor is coupled to the transfer bar, respectively.

Fig. 7A and 7B illustrate an exemplary embodiment of a separation station showing a relief plate precursor before and after separation from a transfer bar, respectively.

Fig. 8 shows a schematic perspective view of an exemplary embodiment of an apparatus for processing a relief plate precursor.

Fig. 9 is a detail perspective view showing a portion of the panel joining station of the embodiment of fig. 8.

FIG. 10 is a detailed top view of a portion of a process chamber.

Fig. 11A and 11B illustrate an exemplary embodiment of a plate separating station, showing the conveyor bar in a low position and a high position, respectively. And

fig. 11C shows the plate separation station of fig. 11A from the other side.

Detailed Description

Fig. 1 schematically illustrates an apparatus 1000 for processing a relief plate precursor (e.g., printing plate precursor P). The apparatus is, for example, a cleaning apparatus for cleaning a relief plate precursor with a liquid. However, other treatments may be performed, such as brushing, rinsing, spraying, drying, irradiating, developing, heating, cooling, removing material from the relief plate precursor, treating the relief plate precursor with a gas or liquid, abrading the relief plate precursor, cutting the relief plate precursor, treating the relief plate precursor with electromagnetic waves, or combinations thereof.

The apparatus 1000 comprises a delivery system 210, 220, 230, the delivery system 210, 220, 230 having at least one, preferably at least two, even more preferably at least three delivery bars 100, the delivery bars 100 being intended to be coupled to a relief plate precursor. For example, as shown in FIG. 1, four conveyor bars 100 may be provided to the conveyor systems 210, 220, 230. The transfer bar 100 is coupled to the leading edge 3 of the relief plate precursor P, preferably the transfer bar 100 extends beyond the entire length of the leading edge 3 such that the end of the transfer bar 100 can be coupled to a transfer mechanism, see further description below. Note that multiple relief plate precursors can also be coupled to the transfer bar 100. Preferably, the length of the conveyor bar 100 is between 100mm and 1000mm, more preferably between 1000mm and 4000 mm.

The apparatus 1000 comprises: a plate coupling station 300 configured to couple the relief plate precursor P to the transfer bar 100; a process chamber 400 configured for processing the relief plate precursor as the delivery shaft 100 with the relief plate precursor P coupled thereto is moved through the process chamber 400; and a plate separation station 500 configured to separate the processed relief plate precursor P from the transfer bar 100. The transport system 210, 220, 230 is configured to: after being coupled to the relief plate precursor P in the plate coupling station 300, each transfer bar 100 is automatically moved from the plate coupling station 300 through the processing station 400 to the plate separation station 500, and after being separated from the processed relief plate precursor P, returned from the plate separation station 500 to the plate coupling station 300, such that the transfer bars 100 move through the apparatus 1000 in a closed loop manner. In the example shown in fig. 1, four conveyor bars 100 circulate in the device 1000.

In a preferred embodiment, each transfer bar 100 is provided with a plurality of penetrating elements 110 (here in the form of pins or rods), and the plate joining station 300 is configured to engage the plurality of penetrating elements 110 in the region near the leading edge 3 of the relief plate precursor P. In fig. 1, a relief plate precursor P has: a leading edge 3 and a trailing edge 4, both perpendicular to the forward transport direction Tf of the relief plate precursor P through the apparatus 1000; and two side edges 1, 2, the two side edges 1, 2 being parallel to the forward conveying direction Tf. The area near the leading edge 3 of the relief plate precursor P is coupled to the plurality of penetrating elements 110 of the delivery rod 100. Fig. 2 and 2A show a more detailed exemplary embodiment of the transfer bar 100. As best seen in fig. 2A, the plurality of penetrating elements 100 preferably have sharp tips 113, and the plate joining station 300 is preferably configured such that the plurality of penetrating elements 110 at least partially penetrate or pass through the unperforated region in the vicinity of the leading edge 3 of the relief plate precursor P. It should be noted, however, that the device 1000 of fig. 1 may also be used with a delivery rod 100 according to another exemplary embodiment, the delivery rod 100 being provided with a plurality of penetrating elements 110 without sharp tips. For example, a region near the leading edge 3 of the relief plate precursor P may be pre-perforated prior to the relief plate precursor P reaching the plate joining station 300, such that a plurality of penetrating elements 110 may be arranged through the pre-perforations in the region near the leading edge 3.

The process chamber 400 has an inlet side 410 and an outlet side 420. The transfer bar 100 with the relief plate precursor P attached thereto moves through the process chamber 400 from the inlet side 410 to the outlet side 420, wherein the transfer bar 100 moves in a forward transfer direction Tf. A plate discharge area 600 is provided between the outlet side 420 of the process chamber 400 and the plate separating station 500. The relief plate precursor P is pulled completely out of the process chamber 400 by the transport system into the plate ejection region 600 before being separated from the transport bar 100 in the separation station 500. In this manner, when the relief plate precursor P is separated from the transfer bar 100, the relief plate precursor P can be discharged in the plate discharge area 600. At the bottom of the plate ejection region 600, a removal device may be provided that is configured to remove the processed relief plate precursor P after it is separated from the transfer bar 100 in the plate separation station 500. In the illustrated embodiment, the removal device 700 is a cart configured to receive the processed relief plate precursor P in the plate ejection area 600 and to be removed from the plate ejection area 600, whereby the cart can be easily removed from the plate ejection area. For example, if the apparatus 1000 is a washer, the operator may transport the washed relief plate precursor P to a dryer to dry the washed relief plate precursor. In other embodiments not shown, the removal device 700 may be a rack, a robot, a conveyor belt, at least one rotating drum, or the like. Also, such a tool may be configured to remove the processed relief plate precursor P from the plate ejection region 600 after separation of the relief plate precursor P in the plate separation station 500.

In the embodiment of fig. 1, the conveyor system comprises a forward conveying mechanism comprising: a first mechanism 210 located on one side of the device 1000; and a second conveyor mechanism 220 located on the other side of the device 1000. The transport mechanisms 210, 220 are configured to transport at least the transport bar 100 with the relief plate precursor P coupled thereto in a forward transport direction Tf from an inlet side 410 of the process chamber 400 to an outlet side 420 of the process chamber 400 and from the outlet side 420 to the plate separation station 500. To this end, the first end 101 of the conveyor bar 100 is coupled to a first forward conveyor 210 and the second end 102 of the conveyor bar 100 is coupled to a second forward conveyor 220. As shown in the exemplary embodiment in fig. 9, the delivery system can include a rod coupling 215, the rod coupling 215 configured to couple the delivery rod, and more specifically, the end 101 and the second end 102 of the delivery rod, to the first and second forward delivery mechanisms 210 and 220. The rod coupling 215 may, for example, be configured for pushing or moving the conveyor rod 100 in the direction of the first and second forward conveying mechanisms such that the ends 101 and 102 of the conveyor rod 100 are coupled to the forward conveying mechanisms 210, 220. In the embodiment of fig. 1, the process chamber 400 has opposing first and second sides 430, 440, the first and second sides 430, 440 extending in the forward transport direction Tf, and the first and second forward transport mechanisms 210, 220 extending on the opposing first and second sides 430, 440 of the process chamber 400, respectively.

As shown in fig. 9, in one exemplary embodiment, the first forward conveying mechanism 210 includes a first lead screw, and the first end 101 of the conveying rod 100 is provided with a first coupling part 121, the first coupling part 121 being configured to be coupled to the first lead screw 210. In a similar manner, the second forward feed mechanism 220 may be provided with a second lead screw, which may be coupled to the second coupling portion 122. These first and second coupling portions 121 and 122 are also shown in fig. 2. However, in other embodiments, first forward conveying mechanism 210 and/or second forward conveying mechanism 220 may comprise other conveying means, such as a chain or belt, and first coupling portion 121 and second coupling portion 122 may be adapted accordingly.

The transport system further comprises a backward transport mechanism 230, which backward transport mechanism 230 is configured to transport the transport bar 100 from the plate detachment station 500 back to the plate attachment station 300. In the embodiment shown in fig. 1, the backward conveying mechanism 230 is located at the upper side of the apparatus 1000. However, in other embodiments, the backward conveying mechanism 230 may be disposed in a lower portion of the device 1000, below the forward conveying mechanisms 210, 220. The backward conveying mechanism 230 may include any one of the following: one or more belts, one or more chains, one or more lead screws, linear motors, or combinations thereof.

In fig. 1, the backward conveying mechanism 230 is arranged centrally above the process chamber 400. However, the backward conveying mechanism 230 may be implemented by a first backward conveying mechanism and a second backward conveying mechanism which are located on opposite sides of the process chamber 400, above or below the first forward conveying mechanism 210 and the second forward conveying mechanism 220. Alternatively, the backward conveying mechanism may be located at a side of the process chamber, and alternatively, the conveying lever may be rotated in a vertical position and conveyed backward. However, in order to reduce the footprint of the apparatus, the backward conveying mechanism is preferably located above or below the first forward conveying mechanism 210 and the second forward conveying mechanism 220.

As shown in fig. 1, the backward conveying mechanism 230 is partially located above the process chamber 400, and the conveying system further includes an upward conveying mechanism 250, the upward conveying mechanism 250 being configured to move the separated conveying bars 100 in the plate separating station 500 upward toward the backward conveying mechanism 230. For example, the upward transport mechanism 250 may move the transport bar 100 in an upward direction Tu (typically a vertical direction) toward the rearward transport mechanism 230, which rearward transport mechanism 230 moves the transport bar 100 back to the board joining station 300 in a rearward transport direction Tb opposite the forward transport direction Tf. The upward transport mechanism 250 may include one or more of any of the following: magnetic devices, electromagnetic devices, clamping devices, vacuum devices, linear motors, chains, belts, lead screws, pistons, or combinations thereof. In other embodiments, where the backward conveying mechanism 230 is located below the forward conveying mechanism, a downward conveying mechanism may be provided. The downward transport mechanism may comprise one or more of any of the following: magnetic means, electromagnetic means, clamping means, vacuum means, linear motors, chains, belts, screws, pistons or a combination thereof, or may be achieved by gravity.

Fig. 2 and 2A show a more detailed exemplary embodiment of the transfer bar 100. The feeding bar 100 is provided with a first coupling part 121 and a second coupling part 122 at the first end 101 and the second end 102. In this case, the coupling portion 121 is configured to have a coupling means to be used in combination with a lead screw. Fig. 2A shows a close-up of a delivery rod 100 having a penetrating element 110. Each perforating element 110 has a connecting portion 111, a penetrating portion 112 and a tip 113. It is worth noting that in this case the penetration 112 has a rectangular cross section and an asymmetric tip 113. Preferably, the largest dimension of the penetration portion 112, viewed in a cross-section perpendicular to the penetration direction, is less than 5mm, more preferably less than 3 mm. In other words, in the example of rectangular cross-section shown, the longest side of the rectangle is preferably less than 5mm, more preferably less than 3 mm. The conveyor bar 100 is equipped with a channel 120 that allows a pin to pass through the conveyor bar 100 from below the conveyor bar 120, see also fig. 3 and 3A discussed below.

Exemplary embodiments of the board joining station 300 and the steps occurring in the board joining station 300 will now be described in detail with reference to fig. 3, 3A, 4 and 4A-4C. Fig. 3 and 3A show the transfer bar 100 in the joining station 300. The plate attachment station 300 includes an alignment member, here in the form of a movable pin 320, configured to align the relief plate precursor P relative to the transfer bar 100. The movable pin 320 extends near the transfer bar 100. To this end, the conveyor bar 100 is provided with a channel 120 that allows pins to pass through the conveyor bar 100 from below the conveyor bar 100 to a position where they protrude through the conveyor bar 100, as best seen in fig. 3A. After aligning the relief plate precursor P to the alignment pins 320, the alignment pins 320 are moved downward and the hammer tool 310 pushes the plurality of penetrating elements 110 through the material of the relief plate precursor, see fig. 4A and 4B. In a preferred embodiment, the hammer tool 310 includes a plurality of holes 311, the plurality of holes 311 configured for receiving a plurality of penetrating members 110. However, other hammer tools 310 are possible, and those skilled in the art will appreciate that instead of a series of holes 311, one elongated recess, for example, configured for receiving multiple penetrating elements 110, may also be provided.

Fig. 5 shows another exemplary embodiment of a conveyor bar 100, the conveyor bar 100 being provided with a plurality of penetrating elements 110, the penetrating elements 110 being attached to one or more movable plates 180, the movable plates 180 being pushed down by a hammer tool (not shown) to advance the plurality of penetrating elements 110 at least partially into the material of the printing plate precursor. The length of the penetrating element 110 may be such that the tip 113 of the penetrating element 110 terminates in a hole in the plate below the precursor after penetrating the relief precursor. In such embodiments, the hammer tool may have a flat lower surface. Additionally, an actuator may be provided to move one or more movable plates 180 upward to receive the relief plate precursor to activate the hammer tool. Instead of having a movable plate 180 for multiple penetrating elements 110, a pivotable arm may be provided for each penetrating element and then the hammer tool is pushed towards the pivotable arm.

Fig. 6A and 6B illustrate another embodiment of a transport bar 100, the transport bar 100 being provided with a plurality of penetrating elements 110, the penetrating elements 110 being configured to penetrate unperforated regions near the leading edge 3 of the relief plate precursor P. In this embodiment, the penetrating element 110 has a sharp blade 130, the blade 130 being capable of being pushed through the material of the relief plate precursor by a hammer tool. In such embodiments, the hammer tool pushes the penetrating element 110 down into the material of the relief plate precursor P. The penetration caused by the plurality of penetrating elements 110 preferably creates holes in the material of the relief plate precursor without removing material.

Note that the shape of the penetrating element 110 may vary, and the shape may be, for example, any of: tubular, blade-like, needle-like, or combinations thereof. Preferably, each penetrating element 110 comprises a penetrating portion 112 (see fig. 2A and 6A) intended to extend substantially vertically through the relief plate precursor, wherein the length of the penetrating portion 112 is between 1mm and 20 mm. In other embodiments, instead of providing the transport rod with a plurality of penetrating elements, the transport rod may be provided with one or more elongated blade elements having sharp edges.

Fig. 7A and 7B schematically illustrate the plate separating station 500 and the steps performed in the plate separating station 500. In fig. 7A, the relief plate precursor P is still coupled to the transfer bar 100. While the transfer bar 100 is held in place, the separation tool 510 present beneath the relief plate precursor P is moved upwardly, whereby the relief plate precursor P is removed from the plurality of penetrating elements 110. After the relief plate precursor P is removed from the plurality of penetrating elements 110, the relief plate precursor P may fall into the plate ejection area 600 and may be removed from the apparatus 1000, as already illustrated above with reference to fig. 1. The separation tool 510 may be a simple linear rod or bar or a bar having a corrugated or toothed structure. Preferably, a corrugated or toothed structure is used to simplify separation.

As shown in fig. 1, the apparatus 1000 preferably includes a control unit 800, the control unit 800 being configured to control the different components of the apparatus, such as the transport mechanisms 210, 220, 230, 250, such that when one transport bar 100 of the plurality of transport bars moves through the process chamber 400, the other transport bar 100 moves back to the plate joining station 300. More preferably, at least three conveyor bars move in the system. In fig. 1, the apparatus 1000 is shown to have four transfer bars controlled such that, at the same time, there is one transfer bar in the board joining station 300, one transfer bar in the process chamber 400, one transfer bar in the board separating station 500, and one transfer bar is transferred backward by the backward transfer mechanism 230. Preferably, one of the at least two conveyor bars is transported through the treatment area while the other conveyor bar is transported back to the joining station. Further, the conveying speed in the forward conveying direction Tf may be different from the conveying speed in the backward conveying direction Tb, wherein preferably the conveying speed in the backward conveying direction Tb is faster than the conveying speed in the forward conveying direction Tf. For example, the ratio of the conveying speed in the backward conveying direction divided by the conveying speed in the forward conveying direction may be in the range of 1 to 400, preferably, in the range of 2 to 300. Typically, the forward conveying speed and the backward conveying speed are in the range of 1 mm/sec to 1000 mm/sec.

Fig. 8 shows an exemplary embodiment of a further development of the device 1000. The process chamber 400 includes a plurality of rotating brushes 450. The relief plate precursor P is pulled under the brush 450 to be cleaned. The brushes may be arranged such that they are above the relief plate precursor P. Additional nozzles and liquid injection means (not shown) may be provided to clean the relief plate precursor while the brush 450 is rotated over the relief plate precursor. In the illustrated embodiment, the brush 450 has an axis of rotation arranged perpendicular to the direction of movement of the relief plate precursor P. However, in other embodiments, a large number of rotating brushes mounted about a vertical axis of rotation may be provided, which brushes are at least partially immersed in the liquid bath. The rotating brush 450 or any alternative brush arrangement is used to thoroughly clean the relief plate precursor. The direction of rotation of the brushes may be the same or opposite to the direction of transport, preferably some brushes rotate in the direction of transport and some brushes rotate in the opposite direction to the direction of transport. In addition, the brushes can move (oscillate) in a direction parallel to their axes. The speed of the brush may vary over a wide speed range, for example in the range of 1rpm to about 2000 rpm. Alternatively, a flat rotating brush or oscillating brush may be used. The invasiveness can also be changed by controlling the pressure at which the brush is in contact with the plate precursor and/or the distance that the brush is brushed against the surface of the plate precursor. The brushes may be the same or different and may vary in the following ways: diameter, stiffness or hardness of the bristles, density of the bristles, thickness of the bristles, material of the bristles (e.g., aluminum, stainless steel, brass, polyethylene, polyoxymethylene, polyamide (nylon), polyester, or combinations thereof), arrangement of the bristles (spiral or linear), length and shape of the bristles (e.g., circular, oval, or rectangular or hexagonal cross-section), or combinations thereof. The intrusion strength of the brush (high intrusion involving removal of a substantial portion of the material) can be varied by changing the intrusion strength from high intrusion at the beginning to low intrusion at the end of the process, or vice versa.

The nature of the liquid used depends on the nature of the precursor employed. If the layer to be removed is soluble, emulsifiable or dispersible in water or an aqueous solution, water or an aqueous solution may be used as the first liquid in the pre-rinsing station. If the layer is soluble, emulsifiable or dispersible in an organic solvent or organic mixture, the organic solvent or organic mixture may be used as the second liquid in the precleaning station. If the precursor has an aqueous developable layer, water or a predominantly aqueous solvent may be used as the second liquid in the development station. In the case of an organic developable precursor, different organic solvents or mixtures thereof may be used as the second liquid in the development station. Accordingly, depending on the nature of the relief layer to be cleaned, the post-cleaning station may operate with water, an aqueous solution, an organic solvent, or a mixture of organic solvents as the third liquid.

The liquid may be water or an aqueous solution, which may contain other ingredients such as salts, acids, bases, emulsifiers, dispersing aids, viscosity modifiers, surfactants, or combinations thereof. Salts, acids and bases may be used to control the pH of the liquid. Emulsifiers and dispersing aids can be used to enhance the ability of the liquid-absorbing material, as well as to stabilize such emulsions and dispersions. The aqueous solution may include: organic solvents such as alcohols, esters, ethers; or a hydrocarbon, or a combination thereof.

The liquid may be an organic solvent or a mixture of organic solvents. For example, a developer may be used that includes a naphthenic or aromatic petroleum fraction mixed with an alcohol (e.g., benzyl alcohol, cyclohexanol, or an aliphatic alcohol having 5 to 10 carbon atoms); and optionally, other components, such as cycloaliphatic hydrocarbons, terpenoid hydrocarbons, substituted benzenes (e.g., diisopropylbenzenes), esters having 5 to 12 carbon atoms, or glycol ethers. Suitable cleaning agents are disclosed, for example, in the documents EP-A332070 or EP-A433374. In addition, the solvent and solvent mixture may include other ingredients such as salts, acids, bases, emulsifiers, dispersing aids, viscosity modifiers, antistatic agents, water, surfactants, or combinations thereof. For safety reasons and to reduce costs and complexity of the apparatus, the temperature at which the organic solvent is used should be 5 ℃ to 15 ℃ below the flash point of the cleaning agent mixture used.

The process chamber may be a unit using a single liquid, but may also consist of two or more sub-units which may use the same fluid or different fluids. Also, the arrangement of the brush and the liquid handling system including pumps, filters, tanks, hoses, etc. may be universal or divided according to the number of subunits.

However, other types of processing devices may be disposed in the process chamber 400 depending on the desired process. The various types of treatments may be selected from cleaning, brushing, rinsing, spraying, drying, irradiating, developing, heating, cooling, removing material, treating with a gas or liquid, grinding, cutting, treating with electromagnetic waves, and combinations thereof.

Also, the process in the process chamber 400 may be a thermal process that results in a liquefied portion of the relief plate precursor, which is then brought into contact with a moving receptor material (e.g., a web, a non-woven material, or a foil), to which the molten material adheres, and which is continuously removed along with the receptor material. Further, instead of having one process chamber 400, a plurality of consecutive process chambers may be provided.

For example, a post-treatment chamber can be provided to post-treat the relief plate precursor, the post-treatment selected from cleaning, brushing, rinsing, spraying, drying, irradiating, developing, heating, cooling, removing material, treating with a gas or liquid, abrading, cutting, treating with electromagnetic waves, and combinations thereof. The post-processing chamber and its components can be controlled by a controller to adjust conditions as needed. Preferably, the post-treatment comprises drying and/or treatment with electromagnetic waves (post-exposure).

The drying station allows complete removal of the liquid. This can be achieved by heating or by reducing the pressure or a combination of both, thereby accelerating the evaporation of the liquid. Heating may be achieved by an oven, hot gas (preferably air or steam), IR light irradiation, microwave irradiation or a combination thereof. The reduction in pressure may be achieved by venting, vacuum pump (e.g., diffusion pump, getter pump, oil pump, etc.), venturi, or a combination thereof. Preferably, drying is performed by heating using an IR lamp or hot air. Preferably, the drying is carried out at a temperature of from 40 ℃ to 200 ℃, preferably from 50 ℃ to 160 ℃, more preferably from 50 ℃ to 100 ℃, most preferably from 50 ℃ to 80 ℃. In the case where the dimensionally stable support of the flexographic printing element is a metal support, drying may also be carried out at higher temperatures up to about 160 ℃.

Post-exposure can be used to render the surface of the developed precursor non-tacky and/or to further cure the photocurable relief layer. In this station, the developed precursor is treated with electromagnetic radiation, preferably UVA or UVC light. As light sources, fluorescent lamps, LEDs or flash lamps or a combination of several of these light sources may be used. Preferably, an LED or a fluorescent lamp is mounted. The light sources may be connected to a control system that controls exposure time, wavelength (in case light sources with different emission spectra are installed), light intensity or a combination thereof.

Furthermore, a pre-chamber may be provided to pre-treat the relief plate precursor, the pre-treatment being selected from: cutting, ablating, exposing to electromagnetic radiation, and combinations thereof. Also, the printing plate precursor may remain coupled to the transfer bar during post-processing and pre-processing. The pretreatment chamber and its components can be controlled by a controller to adjust conditions as needed.

Preferably, the pre-treatment station comprises an ablation device, an exposure device or a combination of both. The ablation process includes removing material from at least one layer. For example, at least one layer of material may be removed based on the image data. More specifically, the execution process may include any one of: exposure to electromagnetic waves; engraving, such as mechanical engraving; exposure to a jet of a substance, such as a particle jet, a fluid jet, a gas jet; exposure to a plasma; exposure to a continuous web, for example for thermal development; or a combination thereof. The electromagnetic wave may be, for example, any of the following: broadband electromagnetic waves, narrowband electromagnetic waves, monochromatic electromagnetic waves, large area electromagnetic waves (e.g., using a lamp), selective electromagnetic waves (e.g., emitted by a laser), waves emitted along the entire axial length of the photosensitive drum or along a portion of the axial length of the photosensitive drum, continuous or pulsed electromagnetic waves, high or low energy electromagnetic waves, ablative or initiating electromagnetic waves, UV to IR electromagnetic waves. The wavelength of the electromagnetic waves may be in the range of 200 to 20000nm, preferably in the range of 250 to 15000nm, more preferably in the range of 300 to 11000nm, most preferably in the range of 350 to 11000 nm. The total power of the electromagnetic radiation ranges from a low value sufficient to trigger a chemical reaction to a high value resulting in rapid heating and evaporation or ablation of the material, for example in the range of 0.1mW to 2000W, preferably in the range of 1mW to 1000W, more preferably in the range of 5mW to 7500W, most preferably in the range of 1W to 200W. Typically, the ablation beam is moved over the surface to create an image, for example by rotating a mirror or rotating the relief plate precursor on a cylinder.

The exposure device comprises a source of electromagnetic radiation which transmits light having the desired wavelength to the front or back of the relief plate precursor. Preferably, the wavelength is in the UV-Vis region of the electromagnetic spectrum. The wavelength of the electromagnetic wave may be in the range of 200 to 800nm, preferably in the range of 250 to 500nm, more preferably in the range of 300 to 450nm, most preferably in the range of 350 to 400 nm. The intensity of the electromagnetic radiation may be 0.1mW/cm²To 200W/cm²In the range of (1), preferably at 1mW/cm²To 200W/cm²More preferably, in the range of 10mW/cm²To 200W/cm²Within the range of (1). As light sources, metal halide lamps, fluorescent lamps, LEDs or flash lamps or a combination of several of these light sources may be used. Preferably, an LED or a fluorescent lamp is mounted. The light sources may be connected to a control system that controls exposure time, wavelength (in case light sources with different emission spectra are installed), light intensity or a combination thereof. The light source and the plate precursor may be stationary during exposure or may be moved relative to each other during exposure. Preferably, the strip-like LED array is moved through the plate precursor or the plate precursor past the LED array. Typically, the exposure is performed through a mask, which may be an integrated part of the plate precursor or a separate mask layer or an electronically switchable mask (e.g. a display-like device with switchable transparent and non-transparent regions or pixels). Also can be used forA scanning beam without a mask is used. The exposure chamber may be used under ambient conditions or in a specific atmosphere (e.g. reduced oxygen content).

Fig. 9 shows in detail the plate coupling station 300, which plate coupling station 300 is used to couple the conveyor bar 100 to the position of the forward conveying mechanism 210, 220. The piston 215 pushes the transfer rod 100 towards the start of the screw and engages it with the screw. Note that the relief plate precursor P is not shown in fig. 9, but in the position shown, typically the relief plate precursor P is coupled to a plurality of penetrating elements 110.

Fig. 10 shows a top view of the process chamber 400 with the brush 450, and the first forward feed mechanism 210 extends on one side of the process chamber 400. Figure 10 also shows a plurality of coupling means 455 for driving the brush 450 in rotation.

Fig. 11A, 11B, and 11C illustrate an exemplary embodiment of the panel separation station 500 in detail. In fig. 11A, the feed bar 100 is in a low position. In this position, the relief plate precursor P is separated from the penetrating element 110 of the transfer bar 100 by a separation tool 510, which separation tool 510 pushes against the lower surface of the printing plate precursor near the leading edge 3. The plate separating station 500 includes a cross member 530, and the cross member 530 is provided with a magnet 520 to pull the transfer bar 100 upward. The air piston 525 is provided to move the cross member 530 upward or downward together with the magnet 520. Next, as shown in fig. 11B and 11C, the conveying bar 100 is moved in the upward direction Tu toward the backward conveying mechanism 230, and the printing plate precursor can fall down in the discharge area 600.

Generally, a relief plate precursor includes a support layer made of a first material and an additional layer made of a second material different from the first material. The support layer may be a flexible metal, a natural or synthetic polymer, paper, or a combination thereof. Preferably, the support layer is a flexible metal or polymer film or sheet. In the case of flexible metals, the support layer may comprise a film, a mesh-like structure, a net-like structure, a woven or non-woven structure, or a combination thereof. Steel, copper, nickel or aluminum plates are preferred and may have a thickness of about 50 to 1000 μm. In the case of polymeric films, the films are dimensionally stable, but flexible, and may be made from, for example, polyalkylene, polyester, polyethylene terephthalate, polybutylene terephthalate, polyamide, and polycarbonate, polymers reinforced with woven, non-woven, or layered fibers (e.g., glass, carbon, polymeric fibers), or combinations thereof. Preferably, polyethylene and polyester foils are used, and their thickness may be in the range of about 100 to 300 μm, preferably in the range of 100 to 200 μm.

The relief plate precursor may carry additional layers. For example, the additional layer may be any of: the layer may be directly engraved (e.g., by a laser), a solvent or water developable layer, a thermally developable layer, a photosensitive layer, a combination of photosensitive layers and mask layers. Optionally, one or more additional layers may be provided on top of the additional layer. Such one or more additional layers may include an overlayer on top of all other layers that is removed prior to imaging the imageable layer. The one or more additional layers may include a relief layer and an antihalation layer between the support layer and the relief layer or on a side of the support layer opposite the relief layer. The one or more additional layers may include an embossing layer, an imageable layer, and one or more barrier layers between the embossing layer and the imageable layer that prevent the diffusion of oxygen. One or more adhesive layers may be provided between the different layers, which ensure correct adhesion of the different layers.

In a preferred embodiment, the relief plate precursor comprises a support layer made of polyester of a polymeric material, and an additional layer made of a directly engravable material (e.g. a resin material). The optional layer may then be a laser ablation layer. In exemplary embodiments, the relief plate precursor can comprise at least a dimensionally stable support layer, a relief layer, and an imageable mask layer. Optionally, other layers may be present. There may be a capping layer on top of all other layers that is removed prior to imaging the imageable mask layer. An antihalation layer may be present between the support layer and the relief layer, or the antihalation layer may be located on the opposite side of the support layer from the relief layer. One or more barrier layers may be present between the relief layer and the imageable mask layer, the one or more barrier layers preventing diffusion of oxygen. One or more adhesive layers may be provided between the different layers, which ensure correct adhesion of the different layers. One or more layers may be removed by treatment with a liquid. The liquids used may be the same or different for the different layers. Preferably, the liquids used are different.

In a preferred embodiment, the relief plate precursor comprises a photosensitive layer and a mask layer. The mask layer may be ablated or otherwise altered in transparency during processing and form a mask having transparent and non-transparent regions. Under the transparent areas of the mask, the photosensitive layer undergoes a change in solubility and/or flowability upon irradiation. This variation is used to create a relief by removing a portion of the photosensitive layer in one or more subsequent steps. The change in solubility and/or flowability may be achieved by photo-induced polymerization and/or crosslinking, resulting in lower solubility and lower melting of the irradiated region. In other cases, electromagnetic radiation may cause cleavage of bonds or cleavage of protecting groups, resulting in higher solubility and/or higher melting of the irradiated region. Preferably, a process using light induced crosslinking and/or polymerization is used.

In one embodiment, the flexible sheet includes a photosensitive layer that includes at least a photoinitiator or photoinitiator system, a binder, and a reactive compound or monomer. A photoinitiator is a compound that, upon irradiation with electromagnetic radiation, forms a reactive species that initiates a polymerization reaction, a crosslinking reaction, a chain or bond scission reaction, which results in a change in the solubility and/or melting of the composition. Photoinitiators are known, which cleave and generate free radicals, acids or bases. These initiators are known to the person skilled in the art and are described in the following documents: [ Bruce M.Mono et al, Chemical Review, 93, 435(1993) ], [ R.S.Davidson, Journal of Photochemistry and Biology A: Chemistry, 73, 81(1993) ], [ J.P.Faussier, Photonically polymerized and applied: Rapra Review, Vol.9, Report, Rapra Technology (1998) ], [ M.Tsunoka et al, 25 prog.Polymer.Sci.21, 1(1996) ], [ F.D.Sacsa, today in Current, 156, 59(1990) ], [ G.G.Maslak, Topics in Current, Chemistry, 168, 1 (Shokson) ], [ H.B.J.J. [ GS.J.J.J., Chemistry, 1990, Chemistry, K, Chemistry [ 14, Chemistry, K.S.12, Chemistry, K.1993, Chemistry, K, Chemistry [ supplement, K.1993 ], Chemistry, supplement, Chemistry, K, particle; or [ R.S.Davidson, expanding the Science, Technology and Applications of U.V.and E.B.Curing, Sita Technology LTD, London 1999 ]. Other initiators are described in JP45-37377, JP44-86516, US3567453, US4343891, EP109772, EP109773, JP63138345, JP63142345, JP63142346, JP63143537, JP4642363, JP59152396, JP61151197, JP6341484, JP2249 and JP24705, JP 6223, JPB6314340, JP1559174831, JP1304453 and JP1152109.

The binder is a linear polymer, a branched polymer or a dendritic polymer, which may be a homopolymer or a copolymer. The copolymers may be random, alternating or block copolymers. Polymers that are soluble, dispersible or emulsifiable in aqueous solutions, organic solvents or a combination of both are used as binders. Suitable polymeric binders are those customarily used for the production of relief printing plates, for example fully or partially hydrolyzed polyvinyl esters, for example partially hydrolyzed polyvinyl acetate, polyvinyl alcohol derivatives, for example partially hydrolyzed vinyl acetate/alkylene oxide graft copolymers, or polyvinyl alcohols which are subsequently acrylated by polymer-analogous reactions (as described, for example, in the documents EP-A-0079514, EP-A-0224164 or EP-A-0059988), and also mixtures thereof. Polyurethanes or polyamides which are soluble in water or in water/alcohol mixtures are also suitable as polymer binders, as described, for example, in the documents EP-A-00856472 or DE-A-1522444. For flexographic printing precursors, an elastomeric binder is used. The thermoplastic elastomeric block copolymer comprises at least one block consisting essentially of an alkenyl aromatic compound and at least one block consisting essentially of a 1, 3-diene. The alkenyl aromatic compound may be, for example, styrene, alpha-methylstyrene or vinyltoluene. Styrene is preferred. The 1, 3-diene is preferably butadiene and/or isoprene. These block copolymers may be linear, branched or radial block copolymers. In general, they are ABA type triblock copolymers, but they may also be AB type diblock polymers, or polymers having a plurality of alternating elastomeric and thermoplastic blocks. Such as ABABA. Mixtures of two or more different block copolymers may also be used. Commercial triblock copolymers typically include some portion of the diblock copolymer. The diene units may be 1, 2-or 1, 4-linked. In addition, thermoplastic elastomeric block copolymers having styrene and a block and a random styrene-butadiene mid-block may also be used. Of course, mixtures of two or more thermoplastic elastomer binders may also be used provided that the performance of the relief-forming layer is not adversely affected. As with the thermoplastic-elastomeric block copolymers described, the photopolymerizable layer may also comprise additional elastomeric binders in addition to the block copolymers. The properties of the photopolymerizable layer can be modified by using such additional binders, also referred to as auxiliary binders. An example of a co-binder is vinyltoluene-alpha-methylstyrene copolymer. These polymeric binders typically constitute from 20% to 98%, preferably from 50% to 90%, by weight of the total layer.

Reactive compounds or monomers suitable for preparing the mixture are those which are polymerizable and compatible with the binder. Useful monomers of this type generally have a boiling point above 100 ℃. Their molecular weight is generally less than 3000, preferably less than 2000. The ethylenically unsaturated monomers used should be compatible with the binder and they have at least one polymerizable ethylenically unsaturated group. As monomers, in particular, esters or amides of acrylic acid or methacrylic acid with mono-or polyfunctional alcohols, amines, amino alcohols or hydroxy ethers and hydroxy esters, esters of fumaric acid or maleic acid and esters of allyl compounds can be used. Esters of acrylic acid or methacrylic acid are preferred. 1, 4-butanediol diacrylate, 1, 6-hexanediol dimethacrylate, 1, 9-nonanediol diacrylate or trimethylolpropane tri (meth) acrylate are preferred. It is of course possible to use mixtures of different monomers. The total amount of all monomers used in the relief-forming layer is generally from 1 to 20% by weight, preferably from 5 to 20% by weight, based in each case on the sum of all constituents of the relief-forming layer. The amount of monomers having two ethylenically unsaturated groups is preferably from 5 to 20% by weight, more preferably from 8 to 18% by weight, based in each case on the sum of all constituents of the relief-forming layer.

The photosensitive layer may contain other components. The other components are selected from: other polymers, fillers, plasticizers, antiblocking agents, monomers, additives (e.g., stabilizers, dyes), stabilizers, crosslinkers, adhesives, chromogenic compounds, dyes, pigments, antioxidants, and combinations thereof.

In another embodiment, the flexible plate comprises a photosensitive layer as described above and a mask layer comprising at least a compound capable of absorbing electromagnetic radiation and a component capable of being removed by ablation (also referred to as a digital plate precursor). Preferably, the mask layer is an integral layer of the relief plate precursor and is in direct contact with the photosensitive layer or a functional layer disposed between the photosensitive layer and the mask layer. The functional layer is preferably a barrier layer and blocks oxygen. The mask layer may be imaged by ablation and may be removed by solvent or by thermal development. The mask layer is heated and removed by irradiation with high energy electromagnetic radiation to form a mask of imaged structures, which is used to transfer the structures to the relief plate precursor. For this purpose, the mask layer may be opaque in the UV region and may absorb radiation in the VIS-IR region of the electromagnetic spectrum. VIS-IR radiation may then be used to heat and ablate the layer. The optical density of the mask layer in the UV region between 330 and 420nm is in the range of 1 to 5, preferably in the range of 1.5 to 4, more preferably in the range of 2 to 4.

The layer thickness of the ablatable mask layer may be in the range of 0.1 to 5 μm, preferably in the range of 0.3 to 4 μm, more preferablyGround, in the range of 1 to 3 mm. Laser sensitivity of the mask layer (to ablate 1 cm)²The required energy measurement) may be in the range of 0.1 to 10mJ/cm²In the range of 0.3 to 5mJ/cm, preferably²More preferably, in the range of 0.5 to 5mJ/cm²Within the range of (1).

While the principles of the invention have been set forth above in connection with specific embodiments, it is to be understood that this description is made only by way of example and not as a limitation on the scope of protection which is determined by the appended claims.