阅读说明：本技术 一种可降解塑料包装袋绿色印刷工艺 (Green printing process for degradable plastic packaging bag ) 是由 葛远乐 于 2021-07-04 设计创作，主要内容包括：本发明公开了塑料包装袋绿色印刷技术领域的一种可降解塑料包装袋绿色印刷工艺,该工艺或者方法的具体步骤如下：主题,其特征在于：该工艺或者方法的具体步骤如下：步骤一：将生产好的塑料袋直接输送到印刷设备中；步骤二：启动印刷设备将塑料袋单面进行印刷；步骤三：将印刷好的塑料袋进行转运进入下一流程；解决了现有设备在使用滚筒丝网印刷时,由于需要多次加墨,多采用敞口墨盒设计,这种印刷方式由于油墨裸露,容易进入灰尘杂物,当杂物进入油墨后,会导致丝网滚筒出现刮伤的风险,从而造成印刷出现残缺,使得印刷质量下降；其次油墨本身属于液体,受重力影响出现油墨本身不均匀,从而造成印刷质量层次不齐的现象出现的问题。(The invention discloses a green printing process for degradable plastic packaging bags, which belongs to the technical field of green printing of plastic packaging bags, and comprises the following specific steps: a theme, characterized by: the process or the method comprises the following specific steps: the method comprises the following steps: directly conveying the produced plastic bag to printing equipment; step two: starting printing equipment to print one side of the plastic bag; step three: transferring the printed plastic bag to enter the next process; the problem that the printing quality is reduced due to the fact that the printing mode of the existing equipment is that the printing ink is exposed and easily enters dust and sundries due to the fact that the ink needs to be added for multiple times and an open ink box is adopted in most cases when the existing equipment is used for screen printing through a roller is solved, and after the sundries enter the printing ink, the risk that the screen roller is scratched can be caused; secondly, the printing ink belongs to liquid and is not uniform under the influence of gravity, so that the phenomenon of uneven printing quality layers is caused.)

1. A green printing process of a degradable plastic packaging bag is characterized by comprising the following steps: the process or the method comprises the following specific steps:

a theme, characterized by: the process or the method comprises the following specific steps:

the method comprises the following steps: directly conveying the produced plastic bag to printing equipment;

step two: starting printing equipment to print one side of the plastic bag;

step three: transferring the printed plastic bag to enter the next process;

wherein in step one and step two the lithography apparatus device includes motor (11) and plastic bag (12), still includes frame (13) of the triangle-shaped of two symmetry settings, motor (11) are fixed to be set up in one of them frame (12) inside wall, two it is provided with three drive roller (14) to rotate between frame (12), drive roller (14) both ends are all coaxial fixed and are provided with input shaft (15), plastic bag (12) are established to drive roller (14) outside cover, three drive roller (14) both ends input shaft (15) all pass frame (13) lateral wall, one of them is close to motor (11) the one end coaxial fixed belt pulley (16) that the input shaft passed frame (13), belt pulley (16) are connected on the output shaft of motor (11) through belt transmission, keep away from three of motor (11) one side input shaft (15) pass the one end of frame (13) and all coaxial fixed be provided with synchronizing wheel (17) ) Wherein, a reversing mechanism is adopted in the middle of the synchronizing wheel (17) at the lower end, the outer wall of the synchronizing wheel (17) is sleeved with a same synchronous belt (18), the lower side of the synchronizing wheel is two, the outer wall of one end of the input shaft (15) penetrating through the rack (13) is coaxially and fixedly provided with a shifting disc (19), the shifting disc (19) is a half block, the inner wall of the shifting disc (19) is provided with a shifting groove (20), the inner part of the shifting groove (20) is sleeved with a shifting rod (21), the outer end of the shifting rod (21) is fixedly provided with a lifting plate (22), the lower end of the rack (13) is fixedly provided with an auxiliary frame (23), the lifting plate (22) is slidably arranged on the outer wall of the auxiliary frame (23), the side wall of the lower end of the lifting plate (22) is fixedly provided with two fixing frames (24), and the fixing frames (24) penetrate through one end of a vertical long round hole arranged on the side wall of the auxiliary, the outer wall of two ends of the ink fountain (25) is fixed with the fixing frame (24), the upper end of the ink fountain (25) is provided with an arc surface (26) corresponding to the driving roller (14), the arc surface is provided with a screen printing hole corresponding to the driving roller (14), the inner side walls of two ends of the ink fountain (25) are fixedly provided with slide rails (28), the inner side of each slide rail (28) is slidably connected with a baffle (27) with an area half of that of the arc surface (26), the baffle (27) is slidably connected with the upper inner wall of the ink fountain (25), the side wall of the baffle (27) is provided with an ink outlet groove (29), the lower side walls of two ends of the baffle (27) are fixedly provided with racks (30), the outer ends of the racks (30) are respectively engaged with driving gears (31), the two driving gears (31) are respectively and coaxially and fixedly provided with driving rods (32), and the driving rods (32) pass through the side walls, the driving rod (32) penetrates through two ends of the ink fountain (25), penetrates through the auxiliary frame (23) again and is sleeved in a long circular hole vertically formed in the side wall of the auxiliary frame (23), wherein the driving rod (32) penetrates through one end of the auxiliary frame (23) and is coaxially and fixedly provided with a power gear (33), the outer side of the power gear (33) is meshed with a shear gear (34), the shear gear (34) is coaxially and fixedly arranged at the outer end of the shifting disc (19), small ring teeth of the shear gear (34) correspond to a shifting groove (20) in the shifting disc (19), the outer side of large ring teeth on the shear gear (34) is meshed with a reversing gear (35), an auxiliary frame (36) is fixedly arranged on the side wall of the auxiliary frame (23), and a rotating shaft of the reversing gear (35) is sleeved in a long circular groove which is formed in the side wall of the auxiliary frame (36) and takes the circle center of the shifting disc (19) as the center, the lateral wall of the displacement disc (19) is also contacted with a shifting plate (37), the shifting plate (37) is rotatably connected to the lateral wall of the auxiliary frame (36), the other end of the shifting plate (37) is contacted with the lower end of a rotating shaft of a reversing gear (35), one side of a shear gear (34) is far away from the lateral wall of the auxiliary frame (23) and a pressure pump (38) is fixedly arranged on the lateral wall of the auxiliary frame, a pressure gear (39) is fixedly arranged on an input shaft of the pressure pump (38), the pressure gear (39) is meshed with a power gear (33), an output pipe of the pressure pump (38) is connected with a sealing plate (40), and the sealing plate (40) is fixedly arranged at the lower end of the ink fountain (25).

2. The green printing process of the degradable plastic packaging bag according to claim 1, wherein the green printing process comprises the following steps: between two drive gear (31) the coaxial fixedly connected with threaded rod (45) of actuating lever (32) outer wall, threaded rod (45) outer wall spiro union has hollow stripper plate (46), a plurality of anomalous through-holes (47) have been seted up to stripper plate (46) lateral wall.

3. The green printing process of the degradable plastic packaging bag according to claim 2, wherein the green printing process comprises the following steps: the through hole (47) is close to the inner part of the extrusion plate (46) and is rotatably connected with a semi-sphere (48).

4. The green printing process of the degradable plastic packaging bag according to claim 3, wherein the green printing process comprises the following steps: go out china ink groove (29) lower extreme and be provided with only flow plate (50) with baffle (27) inner wall laminating, only flow plate (50) are close to the regional inner wall under baffle (27) of torsional spring hinge joint through in ink fountain (25) outer end, only flow plate (50) upper end is provided with only position frame (51), only position frame (51) are fixed to be set up baffle (27) that are close to articulated position one side inner wall down.

5. The green printing process of the degradable plastic packaging bag according to claim 4, wherein the green printing process comprises the following steps: the side wall of the rack (13) is provided with lightening holes.

6. The green printing process of the degradable plastic packaging bag according to claim 5, wherein the green printing process comprises the following steps: the motor (11) adopts a speed reducing motor.

Technical Field

The invention relates to the technical field of green printing of plastic packaging bags, in particular to a green printing process of degradable plastic packaging bags.

Background

The environment-friendly plastic bags are short for various biodegradable plastic bags, and with the development of science and technology, various materials capable of replacing traditional PE plastics appear, including high polymer materials such as PLA, PHAs, PBA, PBS and the like. Can replace the traditional PE plastic bag. The environmental protection plastic bag is widely applied at present: supermarket shopping bags, rolling freshness protection bags, mulching films and the like have large-scale application examples in China. The Jilin province already adopts PLA (polylactic acid) to replace the traditional plastic bag in the whole province, and obtains better effect. In the third city of Hainan province, starch-based biodegradable plastic bags have also entered the industries such as supermarket hotels for large-scale use.

When the existing equipment is used for screen printing by using a roller, because ink needs to be added for many times, the design of an open ink box is adopted, when the roller rotates, naked ink is directly dipped and then is contacted with a plastic bag, so that the ink is brushed on the plastic bag, and the printing is finished; secondly, the ink belongs to liquid and is not uniform under the influence of gravity, so that the phenomenon of uneven printing quality layers is caused.

Based on the above, the invention designs a green printing process for degradable plastic packaging bags, so as to solve the problems.

Disclosure of Invention

The invention aims to provide a green printing process for degradable plastic packaging bags, which aims to solve the problems that the prior equipment adopts an open ink box design because ink needs to be added for many times when a roller is used for screen printing, and the roller directly dips naked ink and then contacts with a plastic bag when rotating so as to brush the ink on the plastic bag and finish printing; secondly, the printing ink belongs to liquid and is not uniform under the influence of gravity, so that the phenomenon of uneven printing quality layers is caused.

In order to achieve the purpose, the invention provides the following technical scheme: the green printing process of degradable plastic packing bag includes the following steps:

a theme, characterized by: the process or the method comprises the following specific steps:

the method comprises the following steps: directly conveying the produced plastic bag to printing equipment;

step two: starting printing equipment to print one side of the plastic bag;

step three: transferring the printed plastic bag to enter the next process;

wherein in the first and second steps the printing equipment device comprises a motor and a plastic bag, and further comprises two triangular machine frames which are symmetrically arranged, the motor is fixedly arranged on the inner side wall of one of the machine frames, two driving rollers are rotatably arranged between the two machine frames, the two ends of each driving roller are coaxially and fixedly provided with an input shaft, the plastic bag is sleeved outside the driving rollers, the input shafts at the two ends of each driving roller penetrate through the side wall of the machine frame, one end of one of the input shafts close to the motor, which penetrates through the machine frame, is coaxially and fixedly provided with a belt pulley, the belt pulley is connected onto an output shaft of the motor through belt transmission, one end of the three input shafts, which is far away from one side of the motor, which penetrates through the machine frame, is coaxially and fixedly provided with a synchronizing wheel, wherein a reversing mechanism is adopted in the middle of the synchronizing wheel at the lower end, and the outer walls of the three synchronizing wheels are all sleeved with the same synchronous belt, the lower two input shafts are coaxially and fixedly provided with a shifting disc through the outer wall of one end of the frame, the shifting disc is a half block, the inner wall of the shifting disc is provided with a shifting groove, a shifting rod is sleeved in the shifting groove, the outer ends of the two shifting rods are fixedly provided with lifting plates, the lower ends of the two frames are fixedly provided with auxiliary frames, the two lifting plates are slidably arranged on the outer wall of the auxiliary frame, the side walls of the lower ends of the two lifting plates are fixedly provided with two fixing frames, one end of each fixing frame penetrating through a vertical long circular hole formed in the side wall of the auxiliary frame is fixedly provided with a same ink fountain, the outer walls of two ends of the ink fountain are fixed with the fixing frames, the upper end of the ink fountain is provided with a cambered surface corresponding to the driving roller, the position of the cambered surface corresponding to the driving roller is provided with a screen printing hole, and the inner side walls of two ends of the ink fountain are fixedly provided with slide rails, the inner side of the sliding rail is slidably connected with a baffle with the area being half of an arc surface, the baffle is slidably connected with the upper inner wall of the ink fountain, an ink outlet groove is formed in the side wall of the baffle, racks are fixedly arranged on the lower side walls of two ends of the baffle, the outer ends of the two racks are respectively meshed with a driving gear, the two driving gears are respectively and coaxially and fixedly provided with a driving rod, the driving rod penetrates through the side wall of the ink fountain and is rotatably connected with the ink fountain, the driving rod penetrates through two ends of the ink fountain and then penetrates through the auxiliary frame and is sleeved in a long circular hole vertically formed in the side wall of the auxiliary frame, one end of the driving rod penetrating through the auxiliary frame is coaxially and fixedly provided with a power gear, the outer side of the power gear is meshed with a shear gear, the shear gear is coaxially and fixedly arranged at the outer end of the deflection disc, small circle teeth of the shear gear correspond to the deflection groove on the deflection disc, and the outer side of large circle teeth on the shear gear is meshed with a reversing gear, the side wall of the auxiliary frame is fixedly provided with an auxiliary frame, a rotating shaft sleeve of the reversing gear is arranged in a long circular arc groove which is formed in the side wall of the auxiliary frame and takes the circle center of a shifting disc as the center, the side wall of the shifting disc is also contacted with a shifting plate, the shifting plate is rotationally connected to the side wall of the auxiliary frame, the other end of the shifting plate is contacted with the lower end of the rotating shaft of the reversing gear, the side wall of the auxiliary frame far away from one side of the shear gear is fixedly provided with a pressure pump, an input shaft of the pressure pump is fixedly provided with a pressure gear, the pressure gear is meshed with a power gear, an output pipe of the pressure pump is connected with a sealing plate, and the sealing plate is fixedly arranged at the lower end of an ink fountain;

when the invention is used, the equipment is firstly assembled, the blow-molded uncut plastic bag is arranged and wound on the driving roller as shown in a mounting drawing (as shown in figure 2, the front view of figure 2 is the right side view of the equipment, the right side of the drawing is the front end of the equipment, the left side of the rear end of the equipment is the front end of the equipment, so that the plastic bag is integrally triangular, the driving roller at the bottom end is used for printing and receiving points, so that the winding area of the driving roller at the bottom of the plastic bag is increased, the printing is convenient, then the height of the plastic bag input driving roller is lower than that of the plastic bag output by the driving roller at the left side, more length can be used for drying the ink after the printing is finished, or the drying equipment is added, the drying is not explained in the invention, the ink is conveyed to the input end of the pressure pump through the pipeline, the motor is started to rotate anticlockwise (as seen in the forward direction of figure 2), and the motor rotates anticlockwise through the belt to drive the belt disc, the belt pulley rotates to drive the coaxial input shaft to rotate (the belt transmission can be arranged in a slipping way, so that the phenomenon that equipment is damaged due to overload operation of the equipment caused by a dead-lock state in the conveying of plastic bags is avoided, the input shaft rotates to drive the driving roller above the front end of the equipment to rotate anticlockwise, the driving roller rotates and then transmits power to the synchronizing wheel through the input shaft far away from one end of the motor and then to the upper end of the synchronizing belt, the synchronizing belt transmits the power to the synchronizing wheel at one end of another driving roller above the rear of the equipment, so that the driving roller above the rear rotates anticlockwise, and simultaneously the synchronizing belt drives the synchronizing wheel at the lower end to enable the driving roller at the lower end to rotate clockwise (because the driving roller below needs to rotate clockwise, the plastic bags can be transported to the front end of the equipment, a commutator is arranged in the middle of the synchronizing wheel at the lower end, and the driving synchronization is realized through the synchronizing wheel and the synchronizing belt, the rotating speeds of the three driving rollers are the same, so that the phenomenon that the printing fails to work is avoided, and meanwhile, the running noise problem of the equipment is also reduced, when the driving roller at the lower end rotates clockwise, the shifting disc at the outer end is driven to rotate clockwise through the input shaft, after the shifting disc rotates, the shifting rod is driven to ascend and then keep through the arc-changing groove on the side wall, and then the shifting rod descends (as shown in figures 3 and 4, so that the shifting rod can ascend, descend and keep the moving process, the printing ink-jet process is closer to the plastic bag, and the phenomenon of ink flying is avoided), during the printing process, the shifting rod ascends to drive the fixing frame to ascend along the long round hole vertically formed on the side wall of the auxiliary frame, the fixing frame ascends to drive the ink fountain to ascend (as shown in figures 2 and 14, the ink fountain is provided with fixing frames at two ends, the fixing frames act through the displacement discs and the displacement rods at the two ends, so that the ink fountain keeps a horizontal state when ascending, thereby avoiding the phenomenon of equipment jamming, after the ink fountain ascends, the cambered surface is close to the outer wall of the plastic bag wound on the outer wall of the lower end driving roller (as shown in figures 2 and 3, the diameter of the driving roller directly influences the printing area size when printing the plastic bag), the ink fountain ascends, so that the driving rod rotatably connected with the side wall also ascends, the driving rod ascends, so that the power gears at the two ends also ascend, the power gears are meshed with the inner ring pinion of the shear gear after ascending, the rotation of the displacement discs simultaneously drives the shear gear to rotate clockwise, the clockwise rotation of the shear gear drives the power gear to rotate anticlockwise, the power gear rotates anticlockwise to drive the driving rod to rotate, the anticlockwise rotation of the driving rod drives the driving gear on the inner side of the ink fountain to rotate anticlockwise, after the driving gear rotates, the driving rack on the lower end face of the direct baffle rotates clockwise around the axis of the driving roller at the lower end, the baffle can be driven to move anticlockwise by the anticlockwise movement of the rack, so that the moving speed of the baffle is kept to be the same as the moving speed of a plastic bag on the outer wall of the driving roller at the lower end, and meanwhile, the driving gear on the left side of the equipment can be meshed with the pressurizing gear of the pressurizing pump on the side face of the auxiliary frame when rising so as to drive the pressurizing pump to start working, when the pressurizing pump works, ink is pressurized through a pipeline and passes through a sealing plate at the lower end of the ink fountain to be conveyed into the ink fountain, and simultaneously, when the baffle at the lower end of the cambered surface moves, the pressurized ink is sprayed to the lower end of the cambered surface through the ink outlet groove and then passes through a screen hole formed in the cambered surface to be sprayed onto the plastic bag (as shown in figures 6 and 10, the rotating speed of the baffle is the same as the moving speed of the plastic bag, so as to avoid the dislocation during printing, thereby causing a pattern smear phenomenon), when the deflection disc rotates by one hundred eighty degrees, during the return stroke, the deflection rod is separated from the arc-changing groove on the deflection disc, the deflection rod descends, and the shifting plate on the side wall of the deflection disc does not rotate anticlockwise under the action of the deflection disc any more, thereby releasing the reversing gear downwards, thereby enabling the reversing gear to be meshed with the power gear, meanwhile, the small ring gear of the shearing gear corresponds to the arc-changing groove of the deflection disc, at this time, the large ring gear of the shearing gear rotates to the lower end and is meshed with the reversing gear (as shown in figures 6 and 7, the shearing gear is meshed with the reversing gear when the reversing gear does not descend, the power gear rotates clockwise along with the contact between the deflection disc and the shifting plate), thereby driving the reversing gear to rotate clockwise, the reversing gear drives the power gear to rotate clockwise, and the reversing gear drives the power gear to rotate clockwise, thereby the upper back that takes place for the indirect baffle removes, and the process is opposite with above-mentioned printing process, does not do this and does not describe in detail here, and power gear has already been broken away from with the pressurization gear when descending simultaneously, and at this moment the force (forcing) pump no longer does work to make the printing ink in the ink fountain no longer pressurize, thereby avoided baffle return stroke in-process ink jet's phenomenon to appear in the play ink duct.

According to the invention, the driving roller drives the plastic bag to move, and the closed ink in the ink fountain is pressurized by the baffle plate with the same running speed as the plastic bag and then sprayed to the surface of the plastic bag, so that the problem that the printing ink is incomplete when impurities appear in the ink due to the adoption of a silk-screen printing mode of dipping dyeing by using an open ink fountain in the prior art is effectively solved; and secondly, the problem that the printing fails or the printing quality is poor due to ink flying caused by the fact that the ink is splashed by the roller rotating at a high speed is avoided.

As a further scheme of the invention, a threaded rod is coaxially and fixedly connected to the outer wall of the driving rod between the two driving gears, a hollow extrusion plate is connected to the outer wall of the threaded rod in a threaded manner, and a plurality of irregular through holes are formed in the side wall of the extrusion plate;

when the ink fountain is used, the ink is in fluidity, so that the problem of poor printing quality can be caused due to the fact that the printing color is different in depth, a set of stirring device is expected to be designed to solve the problem of uneven ink, the threaded rod is driven to rotate forwards and backwards along with the driving rod during working (as shown in figure 9), the extrusion plate is driven to move forwards and backwards in the ink fountain by the forward and reverse rotation of the threaded rod, the extrusion plate moves forwards and backwards, so that the ink penetrates through the through hole in the side wall of the extrusion plate to enter the extrusion plate and then flows out through the through hole, and the ink in the ink fountain is moved and exchanged (as shown in figure 12, the extrusion plate does not have any sliding connection point in the ink fountain, so that the ink irregularly collides with the inner wall of the ink fountain in the moving process, and the stirring quality of the ink is improved).

According to the invention, the extrusion plate is driven to move back and forth by the threaded rod, so that the ink in the ink fountain flows, the ink is stirred and mixed, and the problem of reduced printing quality caused by deposition and layering of the ink in a natural placing state is avoided.

As a further scheme of the invention, the through hole is rotatably connected with the semi-sphere close to the inside of the extrusion plate, and the ink passes through the through hole and then impacts the semi-sphere in the process of moving the extrusion plate back and forth, so that the ink is sprayed and mixed at disordered angles in the extrusion plate and then passes through the semi-sphere to be sprayed out in disorder, and the ink is mixed more thoroughly and efficiently.

As a further scheme of the invention, the lower end of the ink outlet groove is provided with a stop plate attached to the inner wall of the baffle plate, the area of the stop plate close to the outer end of the ink fountain is hinged to the lower inner wall of the baffle plate through a torsion spring hinge, the upper end of the stop plate is provided with a stop frame, and the stop frame is fixedly arranged on the lower inner wall of the baffle plate close to one side of the hinged position;

when the ink fountain is used, a small amount of ink can fly out of the ink outlet groove on the baffle plate when the baffle plate returns, so that the phenomenon of ink flying printing of the plastic bag can be caused, and a set of sealing device is expected to seal the ink fountain to avoid the ink flying phenomenon when the baffle plate returns; during the use, when the baffle carries out printing working phase, the flow stopping plate receives the torsional spring hinge effect and is keeping the open mode always, and receive and end the position frame effect, and opening angle receives the restriction, because, when the return stroke, the flow stopping plate receives below printing ink extrusion to make the flow stopping plate overcome the effect of torsional spring hinge and take place to close (as shown in figure 10, the original direction of raising that opens of flow stopping plate is the working direction of baffle to when baffle printing work, can extrude the ink duct with more printing ink through the flow stopping plate, increase printing quality).

According to the invention, the stop plate is opened in the printing working process of the baffle plate, so that the printing quality is improved, and the ink outlet groove on the baffle plate is closed in the return stroke of the baffle plate, thereby effectively solving the problem that the ink splashes when the baffle plate returns, so that the ink splashing phenomenon is caused on the plastic bag.

As a further scheme of the invention, the side wall of the rack is provided with lightening holes, so that the weight of the equipment is reduced.

As a further scheme of the invention, the motor adopts a speed reduction motor, and higher torque is obtained while the same speed is obtained.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the driving roller drives the plastic bag to move, and the closed ink in the ink fountain is pressurized by the baffle plate with the same running speed as the plastic bag and then sprayed to the surface of the plastic bag, so that the problem that the printing ink is incomplete when impurities appear in the ink due to the adoption of a silk-screen printing mode of dipping dyeing by using an open ink fountain in the prior art is effectively solved; and secondly, the problem that the printing fails or the printing quality is poor due to ink flying caused by the fact that the ink is splashed by the roller rotating at a high speed is avoided.

2. According to the invention, the extrusion plate is driven to move back and forth by the threaded rod, so that the ink in the ink fountain flows, the ink is stirred and mixed, and the problem of reduced printing quality caused by deposition and layering of the ink in a natural placing state is avoided.

3. According to the invention, the stop plate is opened in the printing working process of the baffle plate, so that the printing quality is improved, and the ink outlet groove on the baffle plate is closed in the return stroke of the baffle plate, so that the phenomenon that the ink splashes in the return stroke of the baffle plate is effectively solved, and the phenomenon that the ink is splashed on the plastic bag is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the process of the present invention;

FIG. 2 is a schematic diagram of the overall structure of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

FIG. 4 is a schematic view of the structure of the invention with the variable displacement disk, the variable arc groove and the variable displacement rod;

FIG. 5 is a schematic sectional view of the right front view of the present invention;

FIG. 6 is an enlarged view of the structure at B in FIG. 5 according to the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 6 at C according to the present invention;

FIG. 8 is an enlarged view of the structure of FIG. 6 at D according to the present invention;

FIG. 9 is an enlarged view of E of FIG. 5 according to the present invention;

FIG. 10 is a schematic view showing the general internal structure of the ink fountain according to the present invention; (hidden sealing plate)

FIG. 11 is a partial sectional view of the ink fountain according to the present invention;

FIG. 12 is an enlarged view of the structure of FIG. 11 at F according to the present invention;

FIG. 13 is an enlarged view of the structure of FIG. 12 at G in accordance with the present invention;

FIG. 14 is a partial structure diagram of the left front corner of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

the device comprises a motor 11, a plastic bag 12, a frame 13, a driving roller 14, an input shaft 15, a belt pulley 16, a synchronous wheel 17, a synchronous belt 18, a deflection disc 19, an arc-changing groove 20, a deflection rod 21, a lifting plate 22, an auxiliary frame 23, a fixed frame 24, an ink fountain 25, an arc surface 26, a baffle plate 27, a slide rail 28, an ink outlet groove 29, a rack 30, a driving gear 31, a driving rod 32, a power gear 33, a shear gear 34, a reversing gear 35, a sub-frame 36, a shifting plate 37, a pressurizing pump 38, a pressurizing gear 39, a sealing plate 40, a threaded rod 45, an extrusion plate 46, a through hole 47, a semi-spherical ball 48, a flow stopping plate 50 and a position stopping frame 51.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-14, the present invention provides a technical solution: in order to achieve the purpose, the invention provides the following technical scheme: the green printing process of degradable plastic packing bag includes the following steps:

a theme, characterized by: the process or the method comprises the following specific steps:

the method comprises the following steps: directly conveying the produced plastic bag to printing equipment;

step two: starting printing equipment to print one side of the plastic bag;

step three: transferring the printed plastic bag to enter the next process;

the printing equipment device in the first step and the second step comprises a motor 11 and a plastic bag 12, and further comprises two triangular frames 13 which are symmetrically arranged, the motor 11 is fixedly arranged on the inner side wall of one of the frames 12, three driving rollers 14 are rotatably arranged between the two frames 12, input shafts 15 are coaxially and fixedly arranged at two ends of each driving roller 14, the plastic bag 12 is sleeved outside the driving rollers 14, the input shafts 15 at two ends of each driving roller 14 penetrate through the side wall of the frame 13, one end, close to the input shaft of the motor 11, of each driving roller penetrates through the frame 13, a belt disc 16 is coaxially and fixedly arranged, the belt disc 16 is connected to an output shaft of the motor 11 through belt transmission, one ends, far away from the motor 11, of the three input shafts 15, penetrating through the frames 13, are coaxially and fixedly provided with synchronizing wheels 17, wherein a reversing mechanism is adopted in the middle of the, the lower two input shafts 15 are coaxially and fixedly provided with displacement discs 19 through the outer wall of one end of a frame 13, the displacement discs 19 are half blocks, the inner wall of each displacement disc 19 is provided with an arc-changing groove 20, a displacement rod 21 is sleeved in each arc-changing groove 20, the outer ends of the two displacement rods 21 are fixedly provided with lifting plates 22, the lower ends of the two frames 13 are fixedly provided with auxiliary frames 23, the two lifting plates 22 are slidably arranged on the outer wall of the auxiliary frame 23, the side walls of the lower ends of the two lifting plates 22 are fixedly provided with two fixing frames 24, one end of each fixing frame 24 penetrating through a vertical long circular hole formed in the side wall of the auxiliary frame 23 is fixedly provided with a same ink fountain 25, the outer walls of the two ends of the ink fountain 25 are fixed with the fixing frames 24, the upper end of the ink fountain 25 is provided with an arc surface 26 corresponding to the driving roller 14, screen printing holes are formed in the positions of the arc surface corresponding to the driving roller 14, the inner side walls of the two ends of the ink fountain 25 are fixedly provided with slide rails 28, a baffle plate 27 with the area half of the arc surface 26 is connected to the inner side of the slide rail 28 in a sliding manner, the baffle plate 27 is connected with the upper inner wall of the ink fountain 25 in a sliding manner, an ink outlet groove 29 is arranged on the side wall of the baffle plate 27, racks 30 are fixedly arranged on the lower side walls of the two ends of the baffle plate 27, drive gears 31 are respectively meshed with the outer ends of the two racks 30, drive rods 32 are coaxially and fixedly arranged on the two drive gears 31, the drive rods 32 penetrate through the side wall of the ink fountain 25 and are rotatably connected with the ink fountain 25, the drive rods 32 penetrate through the two ends of the ink fountain 25 and then penetrate through the auxiliary frame 23 and are sleeved in long round holes vertically arranged on the side wall of the auxiliary frame 23, a power gear 33 is coaxially and fixedly arranged at one end of the auxiliary frame 23, a shear gear 34 is meshed with the outer side of the power gear 33, the shear gear 34 is coaxially and fixedly arranged at the outer end of the deflection disc 19, small circle teeth of the shear gear 34 correspond to the arc-changing groove 20 on the deflection disc 19, and a reversing gear 35 is meshed with the outer side of the large circle teeth on the shear gear 34, the side wall of the auxiliary frame 23 is fixedly provided with an auxiliary frame 36, the rotating shaft of the reversing gear 35 is sleeved in a long circular arc groove which is formed in the side wall of the auxiliary frame 36 and takes the circle center of the shifting disc 19 as the center, the side wall of the shifting disc 19 is also contacted with a shifting plate 37, the shifting plate 37 is rotatably connected to the side wall of the auxiliary frame 36, the other end of the shifting plate 37 is contacted with the lower end of the rotating shaft of the reversing gear 35, the side wall of the auxiliary frame 23 far away from one side of the shear gear 34 is fixedly provided with a pressure pump 38, an input shaft of the pressure pump 38 is fixedly provided with a pressure gear 39, the pressure gear 39 is meshed with the power gear 33, an output pipe of the pressure pump 38 is connected;

when the invention is used, the equipment is firstly assembled, the blow-molded uncut plastic bag is arranged and wound on the driving roller 14 as shown in figure 2 (as shown in figure 2, the front view of figure 2 is the right side view of the equipment, the right side of figure 2 is the left side of the rear end of the equipment, so that the plastic bag is integrally triangular, the bottom driving roller 14 is used for printing a carrying point, so that the winding area of the plastic bag at the bottom driving roller 14 is increased, the printing is convenient, then the plastic bag input driving roller 14 is a plastic bag with the height of the right side point lower than that of the left driving roller 14 output, more length can be used for drying the ink after the printing is finished, or a drying device is additionally arranged, the drying device is not explained in the invention, the ink is conveyed to the input end of the pressurizing pump 38 through a pipeline, the motor 11 is started, so that the motor 11 rotates anticlockwise (as viewed from, the belt pulley 16 rotates to drive the coaxial input shaft 15 to rotate (the belt transmission can be arranged in a slipping manner, so that the phenomenon that the equipment is damaged due to overload operation of the equipment caused by a dead-lock state in the conveying of plastic bags is avoided, the input shaft 15 rotates to drive the driving roller 14 above the front end of the equipment to rotate anticlockwise, the driving roller 14 rotates to transmit power to the synchronizing wheel 17 through the input shaft 15 far away from one end of the motor 11 and then to the upper end of the synchronizing belt 18, the synchronizing belt 18 transmits the power to the synchronizing wheel 17 at one end of the other driving roller 14 above the rear of the equipment, so that the driving roller 14 above the rear rotates anticlockwise, and the synchronizing belt 18 drives the synchronizing wheel 17 at the lower end to enable the driving roller 14 at the lower end to start to rotate clockwise (because the driving roller 14 below needs to rotate clockwise, the plastic bags can be transported to the front end of the equipment, therefore, a commutator is arranged in the middle of the synchronizing wheel 17 at the lower end, the synchronizing wheel 17 and the synchronous belt 18 are used for driving synchronization, so that the rotating speeds of the three driving rollers 14 are the same, thereby avoiding the asynchronization in equipment, thereby enabling a plastic bag to be tight or loose, thereby enabling the phenomenon of printing failure to occur, and simultaneously reducing the running noise problem of the equipment, when the driving roller 14 at the lower end rotates clockwise, the shifting disk 19 at the outer end is driven to rotate clockwise through the input shaft 15, after the shifting disk 19 rotates, the shifting rod 21 is driven to ascend and then be maintained through the arc-changing groove 20 at the side wall (as shown in figures 3 and 4, thereby enabling the shifting rod 21 to ascend, descend and maintain the moving process, so that the printing ink-jet process is closer to the plastic bag, thereby avoiding the phenomenon of ink flying), during the printing process, the shifting rod 21 ascends to drive the fixing frame 24 to ascend along the oblong hole vertically formed on the side wall of the auxiliary frame 23, the fixing frame 24 ascends to drive the ink fountain 25 to ascend (as shown in fig. 2 and 14, the fixing frame 24 is arranged at both ends of the ink fountain 25, the ink fountain 25 is kept in a horizontal state when ascending through the action of the displacement disc 19 and the displacement rod 21 at both ends, so that the phenomenon of equipment jamming is avoided), the cambered surface 26 is close to the outer wall of the plastic bag wound on the outer wall of the lower end driving roller 14 after the ink fountain 25 ascends (as shown in fig. 2 and 3, the diameter of the driving roller 14 directly influences the printing area size when printing the plastic bag), the driving rod 32 rotationally connected with the side wall is ascended as the ink fountain 25 ascends, the driving rod 32 ascends to cause the power gears 33 at both ends to ascend, the power gear 33 is meshed with the inner ring pinion of the shear gear 34 after ascending, the rotation of the displacement disc 19 drives the shear gear 34 to rotate clockwise, and the clockwise rotation of the shear gear 34 drives the power gear 33 to rotate anticlockwise, the power gear 33 rotates counterclockwise to drive the driving rod 32 to rotate, the driving rod 32 rotates counterclockwise to drive the driving gear 31 inside the ink fountain 25 to rotate counterclockwise, after the driving gear 31 rotates, the driving rack 30 on the lower end face of the baffle 27 rotates clockwise around the axis of the driving roller 14 at the lower end, the rack 30 moves counterclockwise to drive the baffle 27 to move counterclockwise, so that the moving speed of the baffle 27 is kept the same as the moving speed of the plastic bag on the outer wall of the driving roller 14 at the lower end, meanwhile, the power gear 33 on the left side of the device can be meshed with the pressurizing gear 39 of the pressurizing pump 38 on the side of the auxiliary frame 23 when rising to drive the pressurizing pump 38 to start working, when the pressurizing pump 38 works, the ink is pressurized through a pipeline and is conveyed into the ink fountain 25 through the sealing plate 40 at the lower end of the ink fountain 25, and when the baffle 27 at the lower end of the, then the printing paper passes through the screen holes on the cambered surface 26 to be sprayed onto the plastic bag (as shown in fig. 6 and 10, the rotation speed of the baffle plate 27 is the same as the moving speed of the plastic bag, so that the phenomenon of pattern smearing caused by dislocation is avoided when printing is performed, when the shifting disk 19 rotates by one hundred eighty degrees, during the return stroke, the shifting rod 21 is separated from the arc changing groove 20 on the shifting disk 19, the shifting rod 21 descends, at this time, the shifting plate 37 on the side wall of the shifting disk 19 does not rotate anticlockwise under the action of the shifting disk 19, so that the reversing gear 35 is released downwards, so that the reversing gear 35 is meshed with the power gear 33, at the same time, the small ring gear of the shearing gear 34 corresponds to the arc changing groove 20 of the shifting disk 19, at this time, the large ring gear of the shearing gear 34 rotates to the lower end and is meshed with the reversing gear 35 (as shown in fig. 6 and 7, in a positioned relationship, when the reversing gear 35 does not descend, the shear gear 34 and the reversing gear 35 are already meshed, and the shifting disc 19 is disengaged from the shifting plate 37), then the power gear 33 rotates clockwise, so that the reversing gear 35 is driven to rotate clockwise, the reversing gear 35 drives the power gear 33 to rotate clockwise, so that the baffle plate 27 indirectly moves backwards and upwards, the process is opposite to the printing process, which is not described herein, meanwhile, the power gear 33 descends and is already disengaged from the pressurizing gear 39, and the pressurizing pump 38 does not work any more, so that the ink in the ink fountain 25 is not pressurized any more, and the phenomenon that the ink is jetted from the ink outlet groove 29 in the return process of the baffle plate 27 is avoided.

According to the invention, the driving roller 14 drives the plastic bag to move, the closed ink in the ink fountain 25 is pressurized through the baffle plate with the same running speed as the plastic bag, and then the pressurized ink is sprayed to the surface of the plastic bag, so that the problem that the printing ink is incomplete when impurities appear in the ink due to the adoption of a silk-screen printing mode of dip-dyeing of an open ink fountain in the prior art is effectively solved; and secondly, the problem that the printing fails or the printing quality is poor due to ink flying caused by the fact that the ink is splashed by the roller rotating at a high speed is avoided.

As a further scheme of the invention, a threaded rod 45 is coaxially and fixedly connected to the outer wall of the driving rod 32 between the two driving gears 31, a hollow extrusion plate 46 is screwed on the outer wall of the threaded rod 45, and a plurality of irregular through holes 47 are formed in the side wall of the extrusion plate 46;

when the ink fountain is used, the problem of poor printing quality can be caused due to the fact that the ink is flowable, a set of stirring device is designed to solve the problem of uneven ink, the threaded rod 45 is driven to rotate forwards and backwards along with the driving rod 32 in the working process (as shown in figure 9), the extrusion plate 46 is driven to move forwards and backwards in the ink fountain 25 through the forward and reverse rotation of the threaded rod 45, the extrusion plate 46 moves forwards and backwards, so that the ink penetrates through the through hole 47 in the side wall of the extrusion plate 46, enters the extrusion plate 46 and flows out through the through hole 47, and the ink in the ink fountain 25 is moved and exchanged (as shown in figure 12, the extrusion plate 46 does not have any sliding connection point in the ink fountain 25, and is irregularly collided with the inner wall of the ink fountain 25 in the moving process, and the stirring quality of the ink is improved).

According to the invention, the extrusion plate 46 is driven to move back and forth by the threaded rod 45, so that the ink in the ink fountain 25 flows, the ink is stirred and mixed, and the problem of reduced printing quality caused by deposition and layering of the ink in a natural placing state is avoided.

As a further scheme of the invention, the through hole 47 is rotatably connected with the semi-sphere 48 close to the inside of the extrusion plate 46, and the ink passes through the through hole 47 and then impacts the semi-sphere 48 in the process that the extrusion plate 46 moves back and forth, so that the ink is sprayed and mixed in an unordered angle in the extrusion plate 46 and then passes through the semi-sphere 48 to be ejected out unorderly, and the ink is mixed more thoroughly and efficiently.

As a further scheme of the invention, the lower end of the ink outlet groove 29 is provided with a flow stopping plate 50 attached to the inner wall of the baffle 27, the area of the flow stopping plate 50 close to the outer end of the ink fountain 25 is hinged on the lower inner wall of the baffle 27 through a torsion spring hinge, the upper end of the flow stopping plate 50 is provided with a position stopping frame 51, and the position stopping frame 51 is fixedly arranged on the lower inner wall of the baffle 27 on one side close to the hinged position;

when the ink fountain is used, a small amount of ink can fly out of the ink outlet groove 29 on the baffle 27 when the baffle 27 returns, so that the phenomenon of ink flying printing of a plastic bag can be caused, and a set of sealing device is expected to seal the ink fountain 25 to avoid the ink flying phenomenon when the baffle 27 returns; when the baffle 27 is used in a printing working stage, the flow stopping plate 50 is always kept in an open state under the action of the torsion spring hinge and is limited in opening angle under the action of the stop frame 51, and during return stroke, the flow stopping plate 50 is extruded by ink below to enable the flow stopping plate 50 to be closed against the action of the torsion spring hinge (as shown in fig. 10, the original opening and tilting direction of the flow stopping plate 50 is the working direction of the baffle 27, so that more ink can be extruded out of the ink fountain 25 through the flow stopping plate 50 during printing working of the baffle 27, and the printing quality is improved).

According to the invention, the printing quality is improved by opening the stop plate 50 in the printing working process of the baffle plate 27, and the ink outlet groove 29 on the baffle plate 27 is closed when the baffle plate 27 returns, so that the phenomenon that ink splashes during the return of the baffle plate, and the phenomenon that ink flies on a plastic bag is caused is effectively solved.

As a further scheme of the invention, the side wall of the frame 13 is provided with lightening holes, so that the weight of the equipment is reduced.

As a further aspect of the present invention, the motor 11 is a speed reduction motor, and obtains the same speed and a higher torque force.

The working principle is as follows: when the invention is used, the equipment is firstly assembled, the blow-molded uncut plastic bag is arranged and wound on the driving roller 14 as shown in figure 2 (as shown in figure 2, the front view of figure 2 is the right side view of the equipment, the right side of figure 2 is the left side of the rear end of the equipment, so that the plastic bag is integrally triangular, the bottom driving roller 14 is used for printing a carrying point, so that the winding area of the plastic bag at the bottom driving roller 14 is increased, the printing is convenient, then the plastic bag input driving roller 14 is a plastic bag with the height of the right side point lower than that of the left driving roller 14 output, more length can be used for drying the ink after the printing is finished, or a drying device is additionally arranged, the drying device is not explained in the invention, the ink is conveyed to the input end of the pressurizing pump 38 through a pipeline, the motor 11 is started, so that the motor 11 rotates anticlockwise (as viewed from the front direction of figure 2), the motor 11 rotates and drives the belt pulley 16 to rotate anticlockwise through a belt, the belt pulley 16 rotates to drive the coaxial input shaft 15 to rotate (the belt transmission can be arranged in a slipping manner, so that the phenomenon that the equipment is damaged due to overload operation of the equipment caused by a dead-lock state in the conveying of plastic bags is avoided, the input shaft 15 rotates to drive the driving roller 14 above the front end of the equipment to rotate anticlockwise, the driving roller 14 rotates to transmit power to the synchronizing wheel 17 through the input shaft 15 far away from one end of the motor 11 and then to the upper end of the synchronizing belt 18, the synchronizing belt 18 transmits the power to the synchronizing wheel 17 at one end of the other driving roller 14 above the rear of the equipment, so that the driving roller 14 above the rear rotates anticlockwise, and the synchronizing belt 18 drives the synchronizing wheel 17 at the lower end to enable the driving roller 14 at the lower end to start to rotate clockwise (because the driving roller 14 below needs to rotate clockwise, the plastic bags can be transported to the front end of the equipment, therefore, a commutator is arranged in the middle of the synchronizing wheel 17 at the lower end, the synchronizing wheel 17 and the synchronous belt 18 are used for driving synchronization, so that the rotating speeds of the three driving rollers 14 are the same, thereby avoiding the asynchronization in equipment, thereby enabling a plastic bag to be tight or loose, thereby enabling the phenomenon of printing failure to occur, and simultaneously reducing the running noise problem of the equipment, when the driving roller 14 at the lower end rotates clockwise, the shifting disk 19 at the outer end is driven to rotate clockwise through the input shaft 15, after the shifting disk 19 rotates, the shifting rod 21 is driven to ascend and then be maintained through the arc-changing groove 20 at the side wall (as shown in figures 3 and 4, thereby enabling the shifting rod 21 to ascend, descend and maintain the moving process, so that the printing ink-jet process is closer to the plastic bag, thereby avoiding the phenomenon of ink flying), during the printing process, the shifting rod 21 ascends to drive the fixing frame 24 to ascend along the oblong hole vertically formed on the side, the fixing frame 24 ascends to drive the ink fountain 25 to ascend (as shown in fig. 2 and 14, the fixing frame 24 is arranged at both ends of the ink fountain 25, the ink fountain 25 is kept in a horizontal state when ascending through the action of the displacement disc 19 and the displacement rod 21 at both ends, so that the phenomenon of equipment jamming is avoided), the cambered surface 26 is close to the outer wall of the plastic bag wound on the outer wall of the lower end driving roller 14 after the ink fountain 25 ascends (as shown in fig. 2 and 3, the diameter of the driving roller 14 directly influences the printing area size when printing the plastic bag), the driving rod 32 rotationally connected with the side wall is ascended as the ink fountain 25 ascends, the driving rod 32 ascends to cause the power gears 33 at both ends to ascend, the power gear 33 is meshed with the inner ring pinion of the shear gear 34 after ascending, the rotation of the displacement disc 19 drives the shear gear 34 to rotate clockwise, and the clockwise rotation of the shear gear 34 drives the power gear 33 to rotate anticlockwise, the power gear 33 rotates counterclockwise to drive the driving rod 32 to rotate, the driving rod 32 rotates counterclockwise to drive the driving gear 31 inside the ink fountain 25 to rotate counterclockwise, after the driving gear 31 rotates, the driving rack 30 on the lower end face of the baffle 27 rotates clockwise around the axis of the driving roller 14 at the lower end, the rack 30 moves counterclockwise to drive the baffle 27 to move counterclockwise, so that the moving speed of the baffle 27 is kept the same as the moving speed of the plastic bag on the outer wall of the driving roller 14 at the lower end, meanwhile, the power gear 33 on the left side of the device can be meshed with the pressurizing gear 39 of the pressurizing pump 38 on the side of the auxiliary frame 23 when rising to drive the pressurizing pump 38 to start working, when the pressurizing pump 38 works, the ink is pressurized through a pipeline and is conveyed into the ink fountain 25 through the sealing plate 40 at the lower end of the ink fountain 25, and when the baffle 27 at the lower end of the arc 26 moves, the pressurized ink is sprayed to the lower end of the arc 26 through the ink outlet groove 29, then the printing paper passes through the screen holes on the cambered surface 26 to be sprayed onto the plastic bag (as shown in fig. 6 and 10, the rotation speed of the baffle plate 27 is the same as the moving speed of the plastic bag, so that the phenomenon of pattern smearing caused by dislocation is avoided when printing is performed, when the shifting disk 19 rotates by one hundred eighty degrees, during the return stroke, the shifting rod 21 is separated from the arc changing groove 20 on the shifting disk 19, the shifting rod 21 descends, at this time, the shifting plate 37 on the side wall of the shifting disk 19 does not rotate anticlockwise under the action of the shifting disk 19, so that the reversing gear 35 is released downwards, so that the reversing gear 35 is meshed with the power gear 33, at the same time, the small ring gear of the shearing gear 34 corresponds to the arc changing groove 20 of the shifting disk 19, at this time, the large ring gear of the shearing gear 34 rotates to the lower end and is meshed with the reversing gear 35 (as shown in fig. 6 and 7, in a positioned relationship, when the reversing gear 35 does not descend, the shear gear 34 and the reversing gear 35 are already meshed, and the shifting disc 19 is disengaged from the shifting plate 37), then the power gear 33 rotates clockwise, so that the reversing gear 35 is driven to rotate clockwise, the reversing gear 35 drives the power gear 33 to rotate clockwise, so that the baffle plate 27 indirectly moves backwards and upwards, the process is opposite to the printing process, which is not described herein, meanwhile, the power gear 33 descends and is already disengaged from the pressurizing gear 39, and the pressurizing pump 38 does not work any more, so that the ink in the ink fountain 25 is not pressurized any more, and the phenomenon that the ink is jetted from the ink outlet groove 29 in the return process of the baffle plate 27 is avoided.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.