阅读说明：本技术 一种分张装置及分张方法 (Sheet separating device and sheet separating method ) 是由 候敬军 韩华 张惠普 史宏成 李军龙 孙屹舒 于 2021-08-12 设计创作，主要内容包括：本发明涉及一种分张装置及分张方法,其中的分张装置包括上料架,所述上料架上设有放置纸张的纸仓、位于纸仓内纸张上方的吸盘装置,以及驱动所述吸盘装置沿竖向移动的伸缩机构；所述纸仓包括支撑纸张的底板,以及与底板固接且向上延伸的侧板,所述侧板上安装有滚刷,滚刷的外旋转弧面延伸至纸仓内；纸仓的侧板上还安装有位于滚刷一侧且朝向纸仓内设置的吹嘴。本发明利用滚刷转动、吹嘴吹压缩空气,以及分纸吸盘往复圆周转动导致双张导电纸围绕圆心的半径不同所产生的离型力进行分张,三种离型力的结合使分张的成功率达到了99.9%以上；采用移动小车接收未分离的双张导电纸,避免了运动干涉,同时缩减了设备占地面积。(The invention relates to a sheet separating device and a sheet separating method, wherein the sheet separating device comprises a feeding frame, a paper bin for placing paper, a sucker device positioned above the paper in the paper bin and a telescopic mechanism for driving the sucker device to move vertically are arranged on the feeding frame; the paper bin comprises a bottom plate for supporting paper and a side plate which is fixedly connected with the bottom plate and extends upwards, a rolling brush is mounted on the side plate, and an external rotating arc surface of the rolling brush extends into the paper bin; and a blowing nozzle which is positioned on one side of the rolling brush and faces the interior of the paper bin is also arranged on the side plate of the paper bin. According to the invention, the separation is carried out by using the release forces generated by different radiuses of the two pieces of conductive paper around the circle center due to the rotation of the rolling brush, the blowing of compressed air by the blowing nozzle and the reciprocating circumferential rotation of the paper separation sucker, and the success rate of the separation is up to more than 99.9% due to the combination of the three release forces; the movable trolley is adopted to receive the two pieces of non-separated conductive paper, so that the movement interference is avoided, and the occupied area of the equipment is reduced.)

1. The utility model provides a divide a device, includes material loading frame, its characterized in that: the feeding frame is provided with a paper bin for placing paper, a sucker device positioned above the paper in the paper bin and a telescopic mechanism for driving the sucker device to move vertically; the paper bin comprises a bottom plate for supporting paper and a side plate which is fixedly connected with the bottom plate and extends upwards, a rolling brush and a motor for driving the rolling brush to rotate are arranged on the side plate in the transverse direction, and the external rotating arc surface of the rolling brush extends into the paper bin; and a blowing nozzle which is arranged on one side of the rolling brush and faces the interior of the paper bin is also arranged on the side plate of the paper bin, and the blowing nozzle is connected with an air supply device.

2. A distractor device as claimed in claim 1, wherein: the lateral plate is two, and both sides board mutually perpendicular.

3. A distractor device as claimed in claim 1, wherein: the automatic feeding device is characterized by further comprising a conveyor, wherein a guide rail extending to the upper part of the conveyor and a driving device driving the sucker device to move along the guide rail are mounted on the feeding frame.

4. A distraction device according to claim 3, wherein: the paper sucking device is characterized by also comprising a double-sheet detector positioned on the moving track of the sucking device along the guide rail, wherein when the sucking device moves along the guide rail, the paper sucked by the sucking device passes through the detection end of the double-sheet detector; and two temporary storage trolleys are also arranged below the sucker device along the moving track of the guide rail.

5. A distractor device as claimed in claim 4, wherein: the double-sheet detector is an ultrasonic correlation double-sheet detection sensor, and when the sucker device moves along the guide rail, the paper adsorbed by the sucker device passes between two correlation ends of the ultrasonic correlation double-sheet detection sensor.

6. A distractor device as claimed in claim 4, wherein: the double temporary storage trolleys span over the conveying surface of the conveyor and move along the frame of the conveyor.

7. A distractor device as claimed in claim 6, wherein: the material loading frame is two, and the guide rails on the two material loading frames are perpendicular to each other.

8. A distractor device as claimed in claim 1, wherein: the last installation of sucking disc device is some hair style separator, some hair style separator include with the separation support of sucking disc frame rigid coupling of sucking disc device to and install the separation cylinder on the separation support, the piston rod downward sloping of separation cylinder extends and articulates there is the connecting rod, the one end that the piston rod was kept away from to the connecting rod articulates there is the turning block, the turning block passes through the cross axle and is articulated with the separation support, installs the branch paper sucking disc that sets up down on the turning block, divides the paper sucking disc to be located between the paper edge and the sucking disc device's the paper sucking disc of inhaling.

9. A distractor device as claimed in claim 8, wherein: the paper separating bracket is characterized in that two paper fixing suckers which are arranged downwards are further fixedly arranged on the separating bracket, the two paper fixing suckers are located on one side, close to the center of the paper, of the paper separating sucker, and the paper separating sucker and the two paper fixing suckers are distributed in a triangular mode.

10. A method of separating sheets, comprising the steps of:

(1) placing the paper bundle in a paper bin, enabling the paper to be tightly attached to two side plates vertical to the paper bin, moving a sucker device downwards, and simultaneously sucking the uppermost layer of the paper bundle by using a plurality of paper sucking suckers of the sucker device;

(2) the piston rod of the separation cylinder extends out to drive the rotating block to rotate around the transverse shaft, so that the paper separating sucker sucks the uppermost layer of the paper stack, then the piston rod of the separation cylinder retracts to drive the paper to bend, and due to the fact that the paper has a certain thickness, the arc lengths formed by bending adjacent paper are different, so that the adjacent paper is displaced relatively, and one-time separation is achieved;

(3) after the primary sheet separation is finished, the sucking disc device drives the adsorbed paper to move upwards, when the paper moves upwards to the rolling brush position, the edge of the paper is rubbed by the aid of the rotating rolling brush, gaps are formed between adjacent paper, compressed air is blown to the paper through the blowing nozzle, the gaps between the adjacent paper are expanded by the aid of the compressed air, and secondary sheet separation is achieved;

(4) after secondary splitting is completed, the sucking disc device is driven by the driving device to move towards the conveyor, when paper adsorbed by the sucking disc device passes through a position between two opposite ends of the ultrasonic correlation double detection sensor, whether the paper adsorbed by the sucking disc device is single paper is detected by the ultrasonic correlation double detection sensor, if the paper is single paper, the sucking disc device sends the paper to the conveying surface of the conveyor, and if the paper is not single paper, the sucking disc device sends the paper to the double temporary storage trolley.

Technical Field

The invention relates to the technical field of automation equipment, in particular to the field of paper separation, and specifically relates to a paper separation device and a paper separation method.

Background

The conductive paper is a paper with good conductive performance, has high tensile strength and tearing strength, can form natural curling force after the front-end coiled conductive paper is cut in the production process, and the natural curling force can cause the defects of punching position deviation, precision reduction, bonding air gaps and the like in the rear-end processing and assembling process. The pressing treatment method effectively solves the problem of natural curling, but causes the problem of mutual adhesion among the conductive papers, and the conductive papers need to be separated. Traditional conducting paper is separated manually, a worker wears a silica gel finger sleeve, and can rub two or more pieces of conducting paper tightly attached together with large force, so that the operation efficiency is low, and fingers of the worker can be damaged.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the separating device and the separating method, which adopt equipment to replace manual separation, greatly improve the separating operation efficiency and solve the problem of finger muscle strain of workers.

The invention is realized by the following technical scheme, and provides a separating device, which comprises a feeding frame, wherein a paper bin for placing paper, a sucker device positioned above the paper in the paper bin and a telescopic mechanism for driving the sucker device to move vertically are arranged on the feeding frame; the paper bin comprises a bottom plate for supporting paper and a side plate which is fixedly connected with the bottom plate and extends upwards, a rolling brush and a motor for driving the rolling brush to rotate are arranged on the side plate in the transverse direction, and the external rotating arc surface of the rolling brush extends into the paper bin; and a blowing nozzle which is arranged on one side of the rolling brush and faces the interior of the paper bin is also arranged on the side plate of the paper bin, and the blowing nozzle is connected with an air supply device.

The extrados cambered surface of this scheme round brush means, when the round brush is rotatory, the brush hair is kept away from the cambered surface that the one end of rotation axis formed, when using, place paper pile in the paper storehouse and paste tight paper storehouse curb plate, it moves to paper pile top down to drive the sucking disc device through telescopic machanism, the paper of the superiors is absorbed to the sucking disc through the sucking disc of sucking disc device, then the telescopic machanism drives the sucking disc device and shifts up, when moving to the round brush position on the absorbent paper of sucking disc device, the rotation through the round brush is dialled the paper and is rubbed, make and produce the gap between the adjacent paper, blow in compressed air through the gap between the blowing nozzle to the paper simultaneously, make the gap grow, thereby realize that the paper divides open.

Preferably, the side plates are two, and the two side plates are perpendicular to each other. This optimization scheme's setting, the convenience is fixed a position when the paper is put into the paper storehouse, and convenient two directions of following simultaneously set up round brush and blow gun, improve branch effect and branch efficiency.

Preferably, the device further comprises a conveyor, and a guide rail extending above the conveyor and a driving device driving the sucker device to move along the guide rail are mounted on the feeding frame. This optimization scheme passes through drive arrangement and removes sucking disc device to the conveyer top, in time carries the sola paper after the branch piece through the conveyer, and simple structure avoids paper secondary adhesion.

As optimization, the paper feeding device further comprises a double-sheet detector positioned on the moving track of the sucker device along the guide rail, and when the sucker device moves along the guide rail, paper adsorbed by the sucker device passes through the detection end of the double-sheet detector; and two temporary storage trolleys are also arranged below the sucker device along the moving track of the guide rail. This optimization scheme detects branch and whether the adsorbed paper of sucking disc device is the sola behind the piece through two detectors, temporarily deposits the piece back through setting up two temporary storage trolleys and still adheres to two or many papers together to it puts with the sola paper to have avoided two papers, many papers to mix.

Preferably, the duplex detector is an ultrasonic correlation duplex detection sensor, and when the sucker device moves along the guide rail, the paper adsorbed by the sucker device passes between two correlation ends of the ultrasonic correlation duplex detection sensor. The double-sheet detector of the optimized scheme adopts the ultrasonic correlation double-sheet detection sensor, so that the detection of the number of the paper sheets is more accurate.

Preferably, the double temporary storage trolleys span over the conveying surface of the conveyor and move along the frame of the conveyor. The setting of this optimization scheme, simple structure makes things convenient for two dolly of keeping in to arrange, avoids producing the interference with the transport of conveyer simultaneously, also makes things convenient for the sucking disc device to place the paper.

Preferably, the material loading frame is divided into two parts, and guide rails on the two material loading frames are perpendicular to each other. This optimization scheme has realized duplex position branch through setting up two work or material rest of going up, has further improved the operating efficiency, and the guide rail mutually perpendicular of two work or material rest of going up arranges, makes one of them work or material rest of going up be located conveyer one side, and another work or material rest of going up is located conveyer one end, and is rationally distributed, is fit for sharing a conveyer and two dolly of keeping in.

As optimizing, the last installation of sucking disc device has a dotted head formula separator, dotted head formula separator includes the separation support with sucking disc frame rigid coupling of sucking disc device to and install the separation cylinder on the separation support, the piston rod downward sloping of separation cylinder extends and articulates there is the connecting rod, and the one end that the piston rod was kept away from to the connecting rod articulates there is the turning block, and the turning block passes through the cross axle and is articulated with the separation support, installs the branch paper sucking disc that sets up down on the turning block, divides the paper sucking disc to be located between the paper sucking disc of sucking disc device's paper edge and sucking disc. The nodding type separating device of the optimized scheme sucks paper through the paper separating sucker, the paper is driven to bend by utilizing the telescopic action of the separating cylinder, and due to the fact that the paper has the thickness, when the paper is bent, the arc lengths generated by bending of the paper on different layers are different, so that the paper is moved relatively, and accordingly the separation is achieved.

Preferably, the separation support is further fixedly provided with two downward paper fixing suckers, the two paper fixing suckers are located on one side, close to the center of the paper, of the paper separating sucker, and the paper separating sucker and the two paper fixing suckers are distributed in a triangular mode. This optimization scheme has reduced the bend radius of paper through set up solid paper sucking disc on the separation support, has further promoted the effect of separating.

The scheme also provides a splitting method, which comprises the following steps:

1. placing the paper bundle in a paper bin, enabling the paper to be tightly attached to two side plates vertical to the paper bin, moving a sucker device downwards, and simultaneously sucking the uppermost layer of the paper bundle by using a plurality of paper sucking suckers of the sucker device;

2. the piston rod of the separation cylinder extends out to drive the rotating block to rotate around the transverse shaft, so that the paper separating sucker sucks the uppermost layer of the paper stack, then the piston rod of the separation cylinder retracts to drive the paper to bend, and due to the fact that the paper has a certain thickness, the arc lengths formed by bending adjacent paper are different, so that the adjacent paper is displaced relatively, and one-time separation is achieved;

3. after the primary sheet separation is finished, the sucking disc device drives the adsorbed paper to move upwards, when the paper moves upwards to the rolling brush position, the edge of the paper is rubbed by the aid of the rotating rolling brush, gaps are formed between adjacent paper, compressed air is blown to the paper through the blowing nozzle, the gaps between the adjacent paper are expanded by the aid of the compressed air, and secondary sheet separation is achieved;

4. after secondary splitting is completed, the sucking disc device is driven by the driving device to move towards the conveyor, when paper adsorbed by the sucking disc device passes through a position between two opposite ends of the ultrasonic correlation double detection sensor, whether the paper adsorbed by the sucking disc device is single paper is detected by the ultrasonic correlation double detection sensor, if the paper is single paper, the sucking disc device sends the paper to the conveying surface of the conveyor, and if the paper is not single paper, the sucking disc device sends the paper to the double temporary storage trolley.

The invention has the beneficial effects that: the point head type separation device realizes one-time separation by utilizing the principle that two adjacent conductive papers are relatively moved due to different arc lengths; the conductive paper is poked and rubbed by the rotary roller brush and blown by the blowing nozzle to realize secondary sheet separation, so that the sheet separation success rate and the sheet separation operation efficiency are greatly improved, and the labor cost is reduced; a single piece of conductive paper is sent out in time through a conveyor, and double or multiple pieces of adhered conductive paper are temporarily stored through a double temporary storage trolley, so that secondary adhesion of the conductive paper is avoided; the sheet separating process does not need manual intervention, and the sheets are automatically placed on a conveyor belt according to a preset angle after being separated.

Drawings

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

FIG. 2 is a schematic view of a paper storage according to the present invention;

FIG. 3 is a schematic view of a sucking disc device according to the present invention;

FIG. 4 is a schematic view of the nodding-type separation device according to the present invention;

FIG. 5 is a schematic diagram of a dual detector configuration according to the present invention;

shown in the figure:

1. the automatic paper feeding device comprises a feeding frame I, 2, a sucker device I, 3, a telescopic mechanism I, 4, a feeding frame II, 5, a telescopic mechanism II, 6, a sucker device II, 7, a conveying belt, 8, conductive paper, 9, a double temporary storage trolley, 10, a rolling brush, 11, a blowing nozzle, 12, a sucker support, 13, a rotating block, 14, a paper separating sucker, 15, a double detector, 16, a cantilever frame, 17, a bottom plate, 18, a side plate, 19, a separating support, 20, a separating cylinder, 21, a connecting rod, 22, a paper fixing sucker, 23 and a nodding type separating device.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

As shown in fig. 1, the sheet separating device is used for separating target objects to be separated with various thickness specifications, such as conductive paper, copper foil with a thickness of 0.15mm, or aluminum foil, and the present embodiment takes the conductive paper as an example for description. The utility model provides a device of separating, including belt conveyor and two work or material rest, 7 conveyer belts of belt conveyor carry the solitary conductive paper 8 after will separating forward by the back, one of them work or material rest of going up is located belt conveyor's right side, another work or material rest of going up is located belt conveyor's rear, all install the guide rail that extends to belt conveyor top on every work or material rest of going up, and guide rail mutually perpendicular on two work or material rests, for the convenience of description, in this embodiment, the work or material rest of going up that is located the belt conveyor rear is work or material rest I1, the work or material rest of going up that is located the belt conveyor right side is work or material rest II 4.

The feeding frame is provided with a paper bin for placing conductive paper, a sucker device positioned above the conductive paper in the paper bin, and a telescopic mechanism for driving the sucker device to move vertically. In the embodiment, the sucker device on the feeding frame I1 is a sucker device I2, and the telescopic mechanism on the feeding frame I1 is a telescopic mechanism I3; the sucker device on the feeding frame II 4 is a sucker device II 6, and the telescopic mechanism on the feeding frame II 4 is a telescopic mechanism II 5. The telescopic mechanisms adopt the prior art, and the two telescopic mechanisms of the embodiment both adopt a screw-nut type structure. As shown in fig. 3, the suction cup device includes a suction cup support 12 installed at a lower end of the telescopic mechanism, and a plurality of paper suction cups installed on the suction cup support, and the paper suction cups are disposed downward for sucking the conductive paper.

The paper bin comprises a bottom plate 17 for supporting the conductive paper and two side plates 18 which are fixedly connected with the bottom plate and extend upwards and are perpendicular to each other. The side plate 18 is provided with a rolling brush 10 and a motor which drives the rolling brush to rotate, the axis of the rolling brush is parallel to the side plate where the rolling brush is located, the side plate is provided with a notch matched with the rolling brush, and the outer rotating arc surface of the rolling brush extends into the paper bin. The external rotating arc surface of the rolling brush is an arc surface formed at one end of the brush hair far away from the rotating axis when the rolling brush rotates. The paper bin is obliquely arranged, the lower ends of the joints of the two side plates are low points, the separated conductive paper is prevented from sliding out of the paper bin, and meanwhile the problem that the conductive paper is inserted into the joint area under the conductive paper due to the fact that the conductive paper bends and droops in the joint area of the two conveying belts is solved. Still install the blow gun 11 that is located round brush one side and sets up towards the paper storehouse on the curb plate in paper storehouse, the air feeder is connected to the blow gun, and the mounting height of blow gun is less than the mounting height of round brush to when making the round brush dial down and rub conductive paper, the gap that produces between blow gun and conductive paper is relative, utilizes the compressed air of blow gun spun to make the gap between the conductive paper enlarge, realizes dividing the piece.

Go up the work or material rest and install the drive arrangement that drive sucking disc device followed the guide rail removes, telescopic machanism is last to be provided with the spout of guide rail adaptation, drive arrangement drive telescopic machanism along the guide rail removal, and then realize that sucking disc device moves along the guide rail, and the drive arrangement of this embodiment adopts the lead screw nut structure among the prior art.

The conductive paper separating device of the embodiment further comprises a double-sheet detector 15 located on the moving track of the sucker device along the guide rail, and when the sucker device moves along the guide rail, paper adsorbed by the sucker device passes through the detection end of the double-sheet detector. The two detectors of this embodiment are the two detection sensor of ultrasonic wave correlation, and the two detection sensor of ultrasonic wave correlation passes through cantilever frame 16 and installs on the material loading frame, and when suction cup device removed along the guide rail, the adsorbed paper of suction cup device passed through between the two correlation ends of the two detection sensor of ultrasonic wave correlation.

In order to avoid the interference of temporary storage of double sheets of conductive paper and reduce the occupied area of equipment, a double temporary storage trolley 9 is further arranged below the sucker device along the moving track of the guide rail, spans over the conveying surface of the conveyor and moves along the rack of the conveyor. The two temporary storage trolleys respectively receive two or more pieces of conductive paper which can not be separated through points when arriving at the track of the double-station separating mechanism. The wheels of the double temporary storage trolleys adopt nylon wheels which are customized and processed, and directly move in gaps of the aluminum alloy sections, so that the number of parts is reduced; the temporary storage conductive paperboard of the trolley is also made of nylon, so that the weight is favorably reduced, the inertia is reduced, and the acceleration and deceleration time is shortened.

Head of a bit formula separator 23 has been installed to last installation of sucking disc device, head of a bit formula separator includes the separation support 19 with sucking disc device's sucking disc frame rigid coupling to and install separation cylinder 20 on the separation support, separation cylinder's piston rod downward sloping extends and articulates there is connecting rod 21, the one end that the piston rod was kept away from to the connecting rod articulates there is turning block 13, the turning block passes through the cross axle and is articulated with the separation support, install the branch paper sucking disc 14 that sets up down on the turning block, divide the paper sucking disc to be located between the paper sucking disc of inhaling of conducting paper edge and sucking disc device, divide the paper sucking disc to be located the cross axle and keep away from one side of separation cylinder, the cross axle is located the below of connecting rod. The separation support is further fixedly provided with two paper fixing suckers 22 which are arranged downwards, the two paper fixing suckers are located on one side, close to the center of the conductive paper, of the paper separating sucker, and the paper separating sucker and the two paper fixing suckers are distributed in a triangular mode. The structure of inhaling paper sucking disc, branch paper sucking disc and solid paper sucking disc of this embodiment all adopts prior art's vacuum chuck, connects air exhaust device respectively, utilizes the negative pressure to realize the sucking disc to electrically conductive paper's absorption.

The conductive paper sheet separating method using the conductive paper sheet separating device of the embodiment includes the steps of:

1. placing about 100 pieces of conductive paper piles in a paper bin, enabling the conductive paper to be tightly attached to two side plates perpendicular to the paper bin, automatically judging the fed materials by equipment, manually clicking a start button or setting automatic judgment to pause for 3 seconds, starting the machine to run, enabling a sucker device to move downwards, and simultaneously sucking the conductive paper on the uppermost layer of the conductive paper piles by utilizing a plurality of paper sucking suckers of the sucker device; the value of the vacuum pressure gauge is uploaded to the PLC, and the PLC judges and confirms that the conductive paper is sucked.

2. The piston rod of the separation cylinder extends out to drive the rotating block to rotate around the transverse shaft, so that the uppermost layer of the conductive paper stack is sucked by the paper separation sucker, then the piston rod of the separation cylinder retracts to drive the conductive paper to bend, the piston rod stretches 3-5 times, and due to the fact that the conductive paper has a certain thickness, the arc lengths formed by bending adjacent conductive paper are different, so that the adjacent conductive paper is relatively displaced, and one-time separation is realized;

3. after the primary sheet separation is finished, the sucking disc device drives the adsorbed conductive paper to move upwards, when the conductive paper moves upwards to the rolling brush position, the edge of the conductive paper is rubbed by the aid of the rotating rolling brush, gaps are formed between the adjacent conductive paper, compressed air is blown to the conductive paper through the blowing nozzle, the gaps between the adjacent conductive paper are expanded by the aid of the compressed air, and secondary sheet separation is achieved;

4. after secondary is separated, the sucking disc device is driven to move towards the conveyor through the driving device, when conductive paper adsorbed by the sucking disc device passes through a position between two opposite ends of the ultrasonic correlation double-sheet detection sensor, whether the conductive paper adsorbed by the sucking disc device is a single sheet is detected through the ultrasonic correlation double-sheet detection sensor, if the conductive paper is the single sheet, the sucking disc device moves down to a preset position, the conductive paper is conveyed to a conveying surface of the conveyor, if the conductive paper is not the single sheet, the double-sheet temporary storage trolley is waited to receive the conductive paper, and after the double-sheet temporary storage trolley is in place, the sucking disc device moves down, and the conductive paper is conveyed to the double-sheet temporary storage trolley.

According to the conductive paper separating method, the separating force generated by the rotation of the rolling brush, the separating force generated by the blowing of compressed air by the blowing nozzle and the separating force generated by the reciprocating circumferential rotation of the paper separating sucker, which causes the radius of the two pieces of conductive paper around the circle center to be different, are utilized to separate, the success rate of separating is over 99.9% due to the combination of the three separating forces, and one piece of conductive paper can be separated every 2.4 seconds. The movable trolley is adopted to receive the two pieces of unseparated conductive paper, so that the motion interference is avoided, and the occupied area of the equipment is reduced; and a single set of ultrasonic correlation double-sheet detection instrument installed in a cantilever manner is adopted, so that the overall cost of the equipment is reduced.

Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.