DE1436506A1 - Tape processing machine operating at high speed - Google Patents

Description

D e c h r e i n u n "High-speed tape processing machine" The invention relates to a device with which one can work on flexiolar ligaments, such as tapes made of paper, cardboard, textile material, plastic, metal foil, etc. when they are continuously moving at high speed, operations, such as B.

Perforating, sheet forming or other cross cutting or forming operations Operations.

In more detail, the invention relates to a device with the one in a belt that is continuously moving to and around a rotating cylinder wanders, who drives the tape forward and subjects it to a processing, an im maintains substantial constant tension, with which one further in a case where a tape with printed areas or other repetitive Patterns is treated, the band in register relationship or fit to each other the treatment elements, such as cross-cutting elements supported on the cylinder or perforation matrices, and with which one in a case where the tape is continuously divided into sheets, these successive sheets or removes sections cut off from the tape separately.

The conversion of a printed tape or the like into separate sheets was previously generally made by using a cutting device with one-and-back moveable Shear elements worried With such a procedure, the belt is over a stationary Knife guided and moved at regular intervals by a reciprocating Shear knife cut off that comes into engagement with the stationary knife. the The speed of these operations is seriously limited by the fact that the forward movement of the tape must be interrupted during each cut is carried out.

The duration of each interruption depends on the shear angle of the knives and the moving speed of the reciprocating knife.

Even if the well-known shearing machines blades with uniform The fact that the movement of the tape during the Performing the individual cuts must be interrupted, these machines are unsuitable for a Cutting a tape delivered at a constant speed, for example a tape of a rotary printing machine for paper o. The like. Or a tape of a Walazen frame, which is used to wind a previously printed tape into a Tape roll is used. Apart from that, the delivery speed of the The Bai-lde to these machines is seriously limited by the thing that one Uniform savings in the band is required to ensure the length accuracy to ensure the leaves cut off from the band, and that further difficulties occur in that the new leading end of the tape after each cutting operation must be accelerated. Furthermore, the speed of the to-and-fro movement of the moving knife due to the inertia and the associated Acceleration forces limited. Yet another obstacle to working with The fact that the cutting edge aes Ba. and often has the tendency to get caught on the stationary knife.

Attempts have already been made to create such a band in sheets to manufacture cutting machines that use rotary cutters do to avoid intermittent movement of the belt; the known However, rotary trimming machines were not found to be suitable for @ei d @@ vo @ to the Tape cut sheets once a precision in the desired Format and on the other hand to comply with the desired register accuracy, in particular then not when working at high speed. In addition, lead these machines the successive sheets while working at high Speed is not reliable.

Similar limits as for the accuracy of the format and the Register accuracy when working at high speed also occur when applying of rotary machines for perforating. from continuous belts on e.g. B. in the case of machines used for the production of postage stamps or trade marks be used.

Accordingly, the invention is based on the object of a To provide tape treating apparatus which overcome the above mentioned limitations of the known Machines overcomes, and through the flexible belts cut into sheets, perforated or otherwise machined continuously at extremely high ½ speeds and with which it is ensured that the required accuracy the operation is complied with.

In the case of the tape processing machines or devices according to the invention becomes a flexible band continuously from a printing press, one Take-up roll stand or any other suitable source of supply Tension drawn towards and around the circumferential surface of a rotary cylinder, which continuously drives the belt and processing elements for the Wearing tape that periodically act on the tape; the arrangement is characterized by that a displaceable roller on the position of the band traveling to that cylinder acts and their own position according to the tape tension or the register relationship it is determined on the tape that the cylinder is equipped with radially displaceable parts or Elements is provided which form parts of its peripheral surface, and that positioning means are provided, which proportionally the displaceable parts when the roller is displaced to these displacements werschieben radially so that the compensation on the tape attacking outer surface of the cylinder and thus its advancing speed acting on the belt will be changed.

With this arrangement karin the through a rotary cylinder, the periodically cuts or otherwise deforms the tape, transferred to the tape Propulsion speed can be changed automatically so that variations in belt tension or register variations, if a tape is treated, the repeating one Pattern that is in alignment with the Treatment elements on the Cylinders must be kept balanced; and even if that Tape travels continuously at high speed, it can be cut into sheets, perforated or subjected to other cutting or shaping operations, wherein it is ensured that the required accuracy of these operations is maintained becomes0 In some embodiments of the invention, that slidable roller becomes under a predetermined force, for example by a spring or a pressure cylinder, pressed resiliently against the belt to tension the belt to the desired extent. This has the consequence that variations in the belt tension caused by changes in the outer or atmospheric conditions or due to changed physical properties of the band can come about through corresponding shifts of those Roller are accompanied and thus also by compensating changes in the das Band of the forward driving university surface of the processing cylinder.

In embodiments of the invention for treating tapes that carry repetitive patterns that are in precise register relationship or alignment to the treatment elements must be kept on the rotary cylinder is the device is provided with two rollers influencing the position of the belt, over the tape on its way to that cylinder undervoltage running, one cylinder connected to the above-mentioned positioning means so as to constitute the above-mentioned sliding roller.

One of these two rollers is used to tension the belt under one predetermined force resiliently pressed against the tape while the location of the other is determined by a control device for the register, the type of which is known per se and which the angular position of the cylinder with the position of register marks compares the band approaching the cylinder and for changes in the assignment of these layers responds to move this other roller accordingly.

Since a displacement of this other roller has the tendency, the belt tension to change and so a compensating shift of the yielding against the tape If the roller is pressed, register variations are compensated in this way Compensates for variations in the outer cylinder surface driving the belt forward without that practically the path length of the tape or its tension is changed.

On the outer surface of the rotating cylinder driving the bank the tape is held by suitable tape guide means so that it is opposite this Outer surface does not slide; the tape guide means are adjacent to this cylinder arranged and hold the tape so that it is wrapped around its surface. If it is a machine that is used to cut the ribbon into sheets aient, can the have flexible straps that are wrapped around that surface and exert a yielding tension on it, so that they moved together with the radially displaceable parts of this surface will.

The cylinder generally advancing the tape is the first of two cooperating cutting cylinders, which one the tape in a tanging zone between the two cylinders form a transversely cutting pair, being it perforate or cut into sheets. Each of the two cylinders then has cutting elements for the tape on, which are spaced on them so that they are in that Cooperate zone with associated cutting elements for the tape on the other cylinder ; the radially displaceable parts are between the belt-cutting elements arranged on the cylinder that propels the tape.

In the case of a machine used for perforating the tape, the Cylinder that propels the belt, preferably female die elements which cooperate with these engaging pins on the second cylinder.

In a machine used to cut the ribbon into sheets are on the cylinder that drives the tape forward, preferably @uerschnittende he s :: he arranged, the AmboB or cooperating with them. Counter-pressure elements or counterparts on the second cylinder work together in such a way that ate she cut the ribbon crosswise into a series of separate sheets of paper.

These sheets must forcibly be formed as quickly as they are formed be carried away from the cutting zone in order to prevent them from becoming one another hinder or accumulate in such a way that they interfere with those running at high speeds act continuously on the machine.

Therefore the second cutting cylinder according to the invention is with means provided to the new starting section of the tape that passes through the tangency zone after each cross cutting operation runs, so on the surface of the second cylinder to keep each sheet separated from the tape on the second cylinder from that Zone is carried away.

Furthermore, the second cylinder is larger in diameter than that of the cylinder driving the tape and at the same angular velocity like the latter set in rotation, so that it has a greater circumferential speed as the latter and yet the cooperating cutting elements on the causes both cylinders to meet periodically in the cutting zone; become those holding means designed in such a way that it is possible that each new starting portion of the tape as it hits the surface of the second cylinder is held, can slide relative to this surface until the next cross cutting operation he follows. After that, the sheet then formed is on the faster moving surface that other cylinder is removed from the new leading end of the running belt in such a way that that the sheets separated from the tape one after the other are spaced from one another and are forcibly carried away from the cutting zone as quickly as they arise.

The invention is described below with reference to schematic drawings explained in more detail using several exemplary embodiments. There are other tasks, Features and advantages of the invention clearly.

Figure 1 shows a schematic side elevation, in part broken away and partially drawn in section, one at high speed work ends machine for cutting a tape into sheets according to the invention Fig. la is a schematic view of an alternative arrangement of the sliding Rollers; 2 shows, on an enlarged scale, a transverse section along the line 2-2 from Bige 1 Fig. 3 shows another transverse section according to the line 3-3 of Figure 1; Fig. 4 shows an enlarged partial cross-section of for the machine-appropriate cooperating cutting elements; Figures 5, 6 and 7 show various modifications of the cutting elements; Fig. 8 shows an aborted Drawn perspective view of the cutting edge of one of those shown in FIG Cutting elements, Figure 9 shows a diagram to illustrate the shear cutting action of the cutting elements of FIG. 7 and FIGS. 10 and 11 show those shown broken away perspective views of other modifications of cutting elements that serve able to effect a shear cutting action according to the invention.

In Fig. 1, an embodiment of the invention is in the form of a high speed machine for cutting a strip into sheets shown, which has the task of a continuous and flexible tape W from relatively thin material such as paper, cardboard, textile material, plastic, metal foil or the like, that is continuously delivered to the machine at high speed to cut into successive sections or sheets of even size and remove them individually from the cutting zone as quickly as they are formed will.

The machine shown can print the tape W directly from a rotary tape press or another machine from which it was previously printed or in another Was treated wisely; but it can also continuously from an unwinding roll stand or any other suitable source of supply.

It is assumed that the machine shown is synchronous with the Printing press, the roll stand or the other belt device is driven. That Tape can be made from a single layer or margin of the paper or the like.

Material consist; but it can also be a multi-layer tape that for example by slitting a tape or tapes into strips and Assembling the strips to form a continuous flexible tape can. Furthermore, a plurality of separate ribbons or strips passing through Unclipping a piece of plain printed tape into narrower strips or ribbons Each formed with the width of a printed page of a book or a magazine are treated side by side in the machine at the same time.

The machine shown has a rotating cutting mechanism 12, which consists of a first and a second cylinder 12 and 13, respectively, the at their ends by suitable bearings carried by the side frame parts 11 are stored (Fig0 2 and 3). The two cylinders are so around parallel, horizontal Axes rotated that they are in such a Berülirungs relationship that between them a Tangierungszone Z1 (Fig. 1 and 4) is present in which periodically Cross cutting operations are performed on the tape W to keep the tape continuous to be broken down into a series of individual sheets.

As shown in more detail in FIGS. 2 and 4, has the first cylinder 13, which serves as a propulsion cylinder for the tape, is generally one cylindrical body 15, one or more axially extending on its outside Has recesses 16, which are arranged equally spaced around its circumference are. -Each recess 16 contains a cutting blade or knife 17, which is cut into the associated incision is held by a wedge or a clamping block 18, which is attached to the body 15 by means of screws 19, for example. Even if the Cylinder 13 is shown with three knives 17 arranged on it, so can of course also a larger or smaller number of knives can be carried by the cylinder, what on the circumference of the roller and the length of the successive sections or Sheets depends on the volume W should be cut off; this length is equal to the circumference of the cylinder 13 divided by the number of on this arranged knife 17.

The second or transfer cylinder 14 of the cutting mechanism has a cylindrical body 20 (Figs. 1, 3 and 4) having a plurality of axially extending recesses or slots 21 on its outside, the The number of the gates 16 in the body of the cylinder 13 is the same and also with are arranged evenly spaced from each other in the circumferential direction.

The cutouts or slots 21 are elongated anvil or counterpressure parts 22 adapted, which, for example by springs 23, are urged radially outward.

The radial position of the parts 22 is determined by adjusting screws 24 set, which is offset (at a right angle) in the tapped hole 25 are arranged, which are so formed in the body 20 that they fit into each slot 21 open in. The offset adjustment screws 24 have conical tips 26, the conical sockets formed in their associated counterpressure parts 22 27 attack. These sockets have a larger base diameter than the tips 26, so that the latter extend more or less into the associated sockets 27 can to the radial outward and inward movements of the counter pressure parts 22 The first cylinder 13 is appropriately turned clockwise according to Fig. 1 rotated, for example by a suitably rotated Drive gear 28 (Fig. 2) meshes with a gear 29 that is on a attached from one end of the cylindrical body 15 from extending trunnions is. The second or transmission cylinder 14 is at the same angular velocity rotated like the cylinder 13, but counterclockwise according to FIG. 1; ; for example this drive is carried out by the gear 30 (Fig. 3), which is on a bearing pin which extends from one end of the cylindrical body 20, and which meshes with the gear 29 mentioned above.

Although the cylinders 14 and 14 move at the same angular velocity drenen against each other, the cylinder 14 is a much larger diameter than given the cylinder 19, so that the outer or peripheral speed of the cylinder 14 is much larger than that of the cylinder 16 is. Meanwhile the two cylinders the same number of interacting knives 17 and counter-pressure parts 22 and rotated at the same angular speed, the gears 29 and 30, which are preferably of a non-corrugated type, meshed with each other be brought together in such a way that each knife 17 through the tangency zone Z between the cylinders at the same time as the associated counterpressure part 22 moves as indicated in Figs.

Again from Fig. 1 it can be seen that the tape LJ is downwardly in the direction runs on the lower peripheral portion of the first cylinder 19 and around this is laid around before there is the tangency zone 211 between the two cylinders achieved. In this way it can be achieved that the belt does not face the cylinder 1) slides and to the Tangierungszone with the peripheral speed of this cylinder is transported forward.

The part of the tape that is so wrapped around the cylinder 1, becomes on this by suitable tape guide means 31 (Fig. 1 and 2) tightly fixed Position opposite the knife or knives 1 / held.

The illustrated tape guide means S; l have a plurality of flexible straps 32 drawn around pulleys 33 and 34; these are freely rotatable on shafts that are on the one hand on the front and on the other hand, aes cylinder 13 is arranged on the rear stain. The straps or Belts describe a course 32a that is arcuate between the pulleys and 34 and over the tape wrapped around the lower peripheral portion of the cylinder 13 W extends. As can be seen from FIG. 2, a single band or a single Strips are held in place by each strap 32. The straps go outside of your given @urses 32a in a return course that is constantly below such tension is maintained that is sufficient to keep the band along the bent Course close to the outside of cylinder 13 to be pressed and let them move with it; this is done by spun disks b, which are rotatable are mounted in arms 36 (Fig0 2 j, which extend radially from a shaft) Y7, which is stored in the side tap parts 11. A radial arm 38 (Fig. 1 ) at one end of the shaft 37 is connected to a spring 39, which is so on the adjacent Side frame part 11 is anchored so that it constantly biases the shaft 37 the belt 32 is urging.

The length of the band or bands W below can be seen due to the action of the cutting elements in zone Z1 the circumferential distance on the outside of the cylinder 13 between those on this cylinder successive cutting elements 17 determined.

To the desired format of the sheets cut from the tape It is important that the tape is under a substantial amount of space uniform predetermined tension continuously to the rotary cutting mechanism 12 is pulled, regardless of the effect in a change in the voltage Effects such as a change in the environmental conditions or changes in the physical Properties of the tape. To furthermore, the cutting elements on a printed or otherwise repetitive patterned tape to the correct ones places related to the printing surfaces or the other Patterns To allow the tape to take effect, it is important that the machine is equipped with suitable Control means is provided for this alignment and that the belt tension desired despite. a corrective effect on the alignment by the means controlling them preserved.

As shown in FIG. 1, the propulsion cylinder 13 is according to FIG Invention provided with radially displaceable parts 40, the parts of its on the Band W forming attacking outer surface; the band traveling to the cylinder 13 becomes guided around this by a sliding roller 68 and into the correct position brought; the slidable roller 68 exerts a resilient predetermined force against it the band off, in this example the force of a spring 72, to the band in the desired Clamp dimensions.

Positioning gels are also provided, such as that in FIGS 1 and 2 between the roller 68 and the cylinder 13 recognizable system of levers and Articulations to the parts 40 radially with respect to the axis of the cylinder 13 during displacements of the roller 68 and to move in relation to these. With the help of this arrangement become the effective diameter and the circumference of the cylinder acting on the belt 13 and thus the feed speed of the tape changes automatically and changes in tension compensates for the band approaching the cylinder; because an additional lowering of the voltage is accompanied by a displacement of the roller 68, which becomes a compensating Growing of the outer surface of the cylinder 13 driving the belt forwards, while a additional increase in tension of the belt due to a reverse Shift is accompanied by a compensating decrease in the rate of advance of the tape causes.

1 and 2, the radially displaceable parts 40 are between the knives 17 arranged on the cylinder 13 and thereby slidable in axially extending Slits 41 added, which open radially at such points over the Circumference of the cylindrical body 15 are arranged distributed. Each part is 40 preferably T-shaped in cross-section, so that it has a relatively wide head with in suitably curved outer surface, which has a considerable cutout the outer surface of the cylinder.

2, each part 40 is within a slot 41 through a pair of inclined leaf springs 42 mounted, the outer ends of which on the slidable Part 40 and its inner ends are attached to the cylindrical body 50 and those in the view of the big. 2 constantly move the part 40 to the left and radially inwards push. The other ends of each l'e-iles 40 loosely extend into undercut Rings 4, and 44 provided at the two ends of the body 15, and helical Compression springs 45 act between these rings and the ends of each part 40 to keep the latter additionally to push radially inwards. The ring 49 is on his Fixed in place while the ring 44 is axially displaceable with respect to the body 15 and is provided with an inwardly facing flange 46 which engages in a notch 47 on the adjacent end of each part 40 engages. The location of the movable parts 40 is so determined by the ring 44, and they inevitably follow each axial Displacement of the axially movable ring 44.

The position of the ring 44 and the parts 40 is controlled by a mechanism 48 (FIG. 2), which is connected to the sliding roller 68. This Mechanism includes a shaft 50 axially within an axial bore 52 can slide at one end of the body 15 and carries radial rods 54 which are loose protrude through passages 56 in the body 15 and at their outer ends in suitable bearing bushes engage in ring 44. The outer end of the shaft 5G carries a roller bearing 5d whose one radially extending arm 60 is mounted so that the shaft 50 can rotate together with the cylinder 13 independently of the radial arm bO. A housing 62 mounted around the bearing 58 has idler rollers 64 mounted in the housing in engagement with a barrel cam 66, suitably on the inside of arm 60 around the hub of that arm is attached.

It can be seen that the springs 42 and 45 are constantly the parts 40, the ring 44, the rods 54 and the shaft 50 axially as a unit to the left, i.e. pushing in the direction in which the shaft 50 has the inclination, withdraw into cavity 52. Therefore, the sock drum 66 becomes constant urged against the take-off rollers 64, and any displacement of the arm 60 on the Angular bearing 58 has the effect of either shaft 50 and the parts 40 to the right, as can be seen in Fig. 2, or to allow that the parts 40 are displaced to the left by the force of the springs 42 and 45. When the parts 40 are shifted to the right, they move radially outward on the inclined mounting springs 42, leaving the effective outer surface of the Grow cylinder 13; and when they are shifted to the left, they move radially inward to reduce this outer surface.

As can also be seen from Fig. 1, the displaceable roller 68 mounted in arms 70, 'which extends essentially upwards of its tiltable shaft 71 from extend. The tension spring 72 which presses the roller against the belt is at one end, as shown at 73, with one of the arms 70 and at the other end, as shown at 74, connected to a pivot arm 75 which is attached to a shaft 76 is attached. Another arm attached to shaft 76 carries an articulated one Nut 78 through which an adjusting screw 79 is screwed so that a Rotation of this screw, for example by the one at its end stud 81, the position of the arm 75 changed and thus the by the spring 72 on the Arm 70 and thus also the force exerted by roller 68 against belt W and thus the tension to be maintained on the belt.

The shaft 71 which carries the arms 70 and the roller 68 has another radial arm 82 attached to it so that it mates with that Roller moves. This arm is articulated at 84 to a Benker lever 83, which descends to an articulated connection at 85 with the radial Arm 60 of the above-described mechanism 48 extends so that any displacement of the roller 68 from a proportional displacement of the arm 60 and the sock drum 66 in the angular direction and thus with a proportional or relative Change in the radial position of the sliding parts 40 of the cylinder 13 accompanied is. A brake cylinder or shock absorber 86, which is articulated at 87 on the frame of the machine is mounted, is articulated with its piston rod 88 at 89 with the end of the Armes 82 connected and serves both to prevent any inclination of the floating mounted roller 68 to oscillate during their operation, to reduce and also To prevent shocks in the mechanism 48 in the event of a rupture in the W belt.

When the tension of the belt W falls below the normal right value falls, which is determined by the adjustment of the spring 72, obviously shifts the spring the Roller 68 to the left, as can be seen in Fig. 1, and thus causes an axial displacement of the shaft 50 in the direction in which one Displacement of the parts 40 radially outward and thus an increase in the effective By knife and the peripheral speed of the cylinder 13 and accordingly Increase in tension on the belt is caused until the tension deviation is corrected and the roller 68 is returned to its normal operating position. Conversely, when the tension rises above the desired value, roller 68 becomes shifted to the right in the view of FIG. 1, and the corresponding angular displacement of the arm 60 and the cam 66 causes a corresponding inward movement of the Parts 40, whereby the effective diameter and the propelling the belt Speed of the cylinder 13 is reduced, so that the tension in the belt decreases until the tension offset is corrected and roller 68 returns to its normal Operating position is returned.

A pointer 90 (Fig. 1) on the shaft 71 operates with a scale 91 together to continuously display the position of the sliding roller 68.

The mechanism described above speaks instantly to changes in voltage in the tape that is advanced to the cutting cylinders and corrects them automatically, for whatever reason and whenever they occur to like; this ensures that the tape is essentially below ### at all times the required tension wrapped around the cylinder 13 and pulled by this will. The consequence of this is that the cuts that are made across the ribbon or ribbons carried out in zone S1, can be carried out continuously to leaves in the to produce essential of the required formate even if. Fluctuations in the external conditions or the physical properties of the tape material occur, and even then, the operation of the cutting cylinder at very high levels Speeds takes place.

In addition, the mechanism described can easily be adapted in this way that repeating patterns on the tape in the required register relationship are held with the cutting elements on the cylinder 1 or fit on them, when a printed tape Oo dglo is processed by the machine.

As shown in Fig. 1, the tape W becomes the first cutting cylinder wanders, passed around a roller 200 which is adjustably arranged, through a reversible motor 208 for correcting the register or the start. the Roller 200 is mounted in arms 201 attached to a shaft 202 and a other arm 203 on the same shaft carries an articulated nut 204 which is a screw 205 on the rotating shaft 206 of the motor 208 receives and of this is determined in its position.

The engine 208 forms an element of a control system for the adaptation, which is known per se and continuously changes the angular position of the Cylinder 13 and thus the position of the knife 17 located on this with the Location of register or

Compares adjustment marks M located on the tape W; after the control system has detected a deviation from the desired mutual register relationship Having found these positions, it causes the roller 200 to shift in such a direction and to such an extent as is necessary for a correction of the detected register error is required.

This register control system also includes a photoelectric scanning head 210, a pulse switch 220, a register control unit 230 and suitable electrical Connections 231, 232 and 233 between the unit and the other elements of the System.

The scanning head 210 senses the register marks M on the tape and sends Control signals from when these marks at a particular scanning station 212 on their way to the cylinder 13 pass. A light source 213 in the opf casts a beam onto the tape which is reflected into a photoelectric detector cell 214 which a signal to the register control unit is supplied whenever a Register mark M in the Lichtsttahl device.

The pulse generator switch or pulse generator 220 has a slotted Disk 221, which is in a fixed positional relationship to the rotational movement of the Cylinder 13 is rotated by a pulley 222, a timing belt 223, a driving belt pulley 224 and a drive shaft 225, - to generate its rotational movement is connected to the cylinder 13 by a gear connection. A beam of light from a source within switch-220 passes through a slot or slots. in the disk 221- to a photoelectric cell in the switch-and thus generates signals di; e; - 'from switch 220 to control unit 230 at intervals which is a precise measure of the angular position and speed of the Knife on. give the cylinder 13.

At the beginning of the operation of the machine, the tape W is relative to the Scanning head 210 arranged and the register control system adjusted so that then, when the tape wrapped around the cylinder 13 is correctly applied to one of the knives 17 or more of them are aligned, i.e. if it is so over a knife, that it-, in the correct place between two successive printing surfaces or other patterns on the tape. is made by the movement of the register marks length of the scanning head 21-0 generated signals in coincidence with the Are signals generated by the pulsing switch 220.

Whenever during the course of the cutting operation the Scanning station 212 passing register marks M with respect to the position that the Corresponds to the correct register setting of the tape with respect to the knives 17, run forward or are delayed with respect to this, the deviation is determined by the register control unit determined, and an error signal proportional to the deviation is from the Unit sent to the excitation motor for the register to the motor 208 in the Set the direction in operation in which the register error is corrected.

So if the registration marks and patterns on the tape are opposite the correct position, the motor is put into operation so that it drives the roller 200 on FIG. 1 to the right. This shift causes an additional one Increase in belt tension acting on the sliding roller 68, whereupon this roller proportionally to the right and by means of the steering lever 83 and the Mechanism 48 shifted the radially displaceable line 40 of the cylinder 13 inward will; as a result, the circumference of the cylinder 13 is proportionally reduced and the Length of the driven on this cylinder from one knife 17 to the next knife Ribbon extended. The one for the cuts of the tape desired Places will be in their correct position over the knives on the cutting cylinder is brought back, and at the same time the belt tension is reduced so that the roller 68 returns to its normal operating position.

If reversed the register marks and patterns on the tape are behind the correct position, the motor moves the roller 200 to the left. the belt tension is thus reduced by a certain amount, the roller 68 to the left shifted and the circumference of the cylinder 13 is proportionally increased, so one to accommodate increased tape length between the knives and thus the desired interfaces of the tape in the correct position over the knives. The result of this Action is again that the belt tension is brought back to its normal value will.

Bel the embodiment of FIG. 1, the SinfluB of the roller acts is determined by the register control system in their position, only indirectly on the voltage of the belt W and thus on the position of a movable roller that is resilient against the tape presses. The objects of the invention can also be achieved by one as the roller, which is determined in its position by the register control system, the sliding roller used, which is the effective extent of the expandable Belt treatment cylinder controls.

As shown schematically in Fig. 1a, z. B. the cutting mechanism 12 wandering belt passed around a sliding roller 200a, which is in place by a reversible motor 208a for substantially correcting the register position is determined in the same manner as roller 200 of Figure 1; this roller 200a but is direct, namely through the arm 203a, the shaft 202a and the arm 82a connected to the handlebar lever 83 of the mechanism 48, which controls the position of the radially displaceable Parts 40 of the cylinder 1y determined.

So that the alignment-correcting displacements of the roller 200a practically does not change the path length or the tension of the belt W, presses a roller 68a, tensioning the belt, resiliently against the belt, either on a point in front of the roller 200a, as can be seen from Fig. 1a, or between the roller 200a and the cylinder 13. This pressure roller is of arms 70a of a shaft 71a carried, from which another arm 73a extends radially to articulated connections with the piston rod of a shock absorber 86a and the piston of a pressure medium cylinder 72a extends. Compressed air at a predetermined pressure, which through a line 74a to Base of the pressure medium cylinder is passed, the roller 200a can be with a apply constant force against the belt so that this roller adjusts its position automatically changes depending on variations in the length or tension of the belt.

Therefore, register errors become when the tape travels to the cutting mechanism in the embodiment of FIG. 1a automatically in essentially the same way corrected, as is the case with the embodiment of FIG. 1; and so long during operation, as the displacements of the belt do not limit the range of motion of the roller 68a exceed the belt tension becomes substantially at the value held, which is determined by the pressure medium pressure in the cylinder 72a. If a If a larger control range of the voltage is required, this can be achieved by using a pretensioned, belt-tensioning roller, which is part of the Belt driving and tensioning control mechanism of known construction.

If, during operation of the device according to FIG. 1a, the register marks M advance on the belt from the correct position, the motor O8a will do so set in operation that it moves the roller 200a to the left in the drawing. This displacement causes the radially displaceable parts 40 of the cylinder 13 are shifted inwards, so that the circumference of the cylinder 13 and the length of tape that is on the cylinder from one knife 17 to the next Knife is conveyed, is reduced. The leftward shift of the Roller 200a results in a temporary increase in the belt tension, which is immediate by shifting the roller 68a and the slidable piston within of Pressure medium cylinder 72a is counteracted. The desired locations on the Tape to be performed transverse cutting operations are so at their correct Places moved back over the knives on the cutting cylinder, by combining them a backward displacement of the tape and a proportional decrease in tape speed; at the same time there is a change in belt tension, which is otherwise a consequence of the shift is absorbed by movement of the roller 68a.

If, conversely, the register marks compared to their correct position arrive delayed, the motor 208a moves the roller 200a to the right, and the The circumference of the cylinder 13 is proportionally increased so that it has an increased tape length takes up between the knives 17 and so the desired points of the transverse Brings cutting operation on the tape to their correct locations over the knives, and by combining a forward displacement of the belt and a proportional one Increase in bani speed; in turn, the change in belt tension that otherwise occurs absorbed by displacement of the roller 68a.

Now consider the cutting and sheet delivery functions in more detail of the mechanism 12, it can be seen from FIGS. 1 and 4 that each time they come together a knife 17 on the cylinder 13 with a counter pressure part 22 on the cylinder 14 these elements in the tangential zone Z1 transversely through the Cut tape W, so that it has passed through zone Z1 since the execution of the Cut off the advanced section of tape before making the previous cut. This section of the tape was meanwhile except for a slide on the faster moving surface of the cylinder 14 under the action of a suitable holding means on this cylinder held, which is the new leading end of the tape that is formed with each cut, pulls to its surface and yet a relative slippage towards this new end allowed by its surface.

More in the one is the grain 20 of the cylinder 14 with an axial Bore 92 provided, which is through a journal at one end in a Elbow 93 (Fig. 3) opens, which is suitably connected to a vacuum source is. The peripheral portions of the cylinder 14 between the counter pressure parts are formed by curved plates 94 in which air holes 95 over annular cavities 96 which are formed with the axial bore 92 through radial passages 97 in Connect & - stand. This pulls in through the openings 95 in a suitable manner exerted suction a new end of the tape in zone Z1 to the surface of the cylinder 14 and still allows this end to be on the faster moving cylinder surface slides until the next cut is made across the belt.

Of course, making the next cut will sever a sheet S1 (Fig. 1) from the band on the length determined by the circumferential distance between the successively coming into effect knives 17 on the cylinder 13 is determined. This sheet is released at that moment, moving at the circumferential speed of the cylinder 14 to be able to move when it is separated from the subsequent belt body; so the negative pressure applied to it through openings 95 causes it to come out the zone Z1 is carried away at a greater speed than the new tape end wanders behind him This has the consequence that the successive, from the tape cut leaves are spaced apart and separated at high speed carried away on the surface of the cylinder 14.

To further ensure that each sheet of S1 is immediately after Separation from the tape accelerated to the circumferential speed of the cylinder 14 is, the machine is provided with a spreader roller 98 (Fig. 1), which acts so that it presses the sheet tightly against the surface of the cylinder 14 when the cut is carried out.

This roller is made with a segment-shaped elastic flange 99 Rubber or similar material provided that is in rolling contact with each sheet S1 is rotated on the surface of the cylinder 14 at the moment when the sheet is separated from the tape, and which passes through at the speed of this surface a suitable belt drive 100 is driven. This will make the relative inertia of the cut sheet immediately overcome, so that it is forcibly removed from the Cutting zone is driven away on the second cylinder. If it happens that the Cut a connection between the leaf and the free hanging body of the tape leaves, this connection is also made by the train of the cylinder 14 and the roller 98 torn on the nearly formed sheet.

The interaction of the faster moving surface of the cylinder 14 with the surface of the cylinder 13 is not just for the neat delivery of the cut leaves is important, but also, as will be made clearer in the following is, for the effectiveness of the cutting actions exerted on the tape in zone Z1 will.

Due to the difference in peripheral speeds, each one engages Counterpressure part 22 that converges with a knife 17 or moves towards this, on the knife and moves relative to this with a scissor-like cutting action over a fairly extensive contact arc in zone Z1. This effect increases the safety and the quality of the cutting, and one can take advantage of it, by providing cutting elements that expressly assume cutting with relative movement in the direction of their migration through the cutting zone. are adapted. Different effective forms such cutting elements are shown in FIGS - 11 of the drawings.

In the embodiments of FIGS. 4 and 5, each has a spring-loaded Counterpressure part 22 on the cylinder 14 a surface engaging the knife, the convex is curved, so that a progressive sliding and compressing engagement on the tape and on the edge of a knife 17 on the cylinder 13 is obtained when the cutting elements are carried through the cutting zone.

In the modifications of FIGS. 7, 8 and 9, each is a counter pressure member 22a on the cylinder 14 with a cutting edge 101 (Fig. 8) provided with is inclined at a slight angle with respect to the axis of the cylinder 14, so that one end of this cutting edge moved a little before the other end. The difference between the peripheral speeds of the cylinders 13 and 14 causes the edge a knife 17 progressing along the inclined edge 101 of the counter pressure member 22a cuts as the cutting elements move through zone Z1.

As shown in more detail in FIG. 9, the knife engages 17 at the counterpart 22a at a location a to cut at the point a 'at the starting end of edge 101 to begin. As a result of the higher speed of the counterpart strides the cutting action along the inclined edge lOlfort, through the Lines b and c until the free end moves away from the knife edge. The cutting is carried out with a scissors-like shearing action on the tape.

According to the embodiment of FIG. 5, each is a knife 17b attached to the cylinder 13 on a wall of a cutout lbb in the body 15, with a spacer 103 interposed on the knife base so that the outer asciinitt of the knife is free to help me a little when gripping the counterpressure part 22 to be able to bend. This boom-like mount reduces impact and shock loads during cutting and increases the service life of the cutting elements.

In the embodiment of Figure b, each cutting element has on the Cylinder 14 has the shape of a knife blade 22c, which at 104 is attached to a support 105 is articulated, which is fastened in a recess 21c in the body 20 of the cylinder 14 is. The blade is pressed against the wall of the recess by a spring 107, which acts in one direction opposite to the direction of rotation of the cylinder 1 / -S. The cutting edges the associated knives 17 and 22c are allowed to overlap in zone Z1 so that one Shearing cutting action is achieved.

In the embodiment of FIG. 10, a scissors-like cutting action is used by using a counter Get piece 22c that has a cutting edge 108 which is curved against its direction and its central section or vertex points in this direction of rotation, so that the cut is in the center of the band begins and continues outward to the edges of the tape.

In the embodiment of FIG. 11, each counterpart 22c1 has one similar but reversely curved or concave cutting edge 109, whereby the cutting process begins at the edges of the tape and continues from its side to its center.

Further consideration is given to the delivery of the cut leaves S1, it can be seen from FIGS. 1, 3 and 4 that the surface of the cylinder 14 with Recesses 110 is formed at such points in front of the counterpressure parts or counterparts 22 of these have such a circumferential distance that is equal to Length of each sheet is, so then, this length of tape is cut off in each case is after it has slipped along the surface of the cylinder 14, the The leading edge of the sheet formed comes to rest over one of the recesses 110 and is at a distance from the free end of the next preceding sheet. Every sheet is carried away by the cylinder 14 in a position that allows their To grasp the leading edge securely and remove it from the cylinder 14, even if its Movement occurs at very high speed.

The removal of the sheets from the surface of the cylinder 14 can done in different ways. As shown in Figs. 1 and 3, a Discharge conveyor 111 on a shaft 113 pulleys 112 aS, over the belt 116 run tangential to the surface of the cylinder 14.

The shaft 113 is driven by a gear 114 with a Gear 115 meshes that rotates with cylinder 14. The straps 116 carry finger-like Grippers 119 which press against the belts while the conveyor is running straight and are kept open while rotating around a pulley. The straps will at a speed lower than the peripheral speed of the cylinder 14 driven; but the grippers 119 are arranged on them so that a set in the gripper located in the open position protrudes into a recess 11O of the cylinder 14, around the leading edge of a sheet S1 on this cylinder with each movement of the grippers via the pulleys 112, the sheet is so inserted into the from the open Grippers formed pocket moved in and gripped by the straps and by the cylinder 14 peeled off in order to be finally removed when the grippers 119 in the lower Pass over the side of the belt 116. The one still acting on the sheet through the openings 95 Vacuum ensures that the free end of the peeled sheet with the surface of the cylinder 14 downwards and thus carried away from the leading edge of the next sheet to get free from the cylinder.

Claims (22)

Claims 1. tape processing machine, in which a flexible Tape continuously under tension to and around the circumferential surface of a rotary cylinder is pulled, which continuously drives the tape forward, and tape handling elements wears, which act periodically on the belt, thereby g e k e n n e i c h n e t that a displaceable roller whose own position according to the belt tension or is determined according to a register relationship of the band, to the location of the to that Cylinder migrating tape acts that this cylinder radially sliding parts or has links which form parts of its circumferential surface engaging the belt, and that positioning means are provided which the displaceable parts at Shift the displacements of that roller in proportion to these displacements radially in such a way that that they compensate for the circumferential surface of that cylinder and acting on the tape change their advance speed for the tape. 2. Machine according to claim 1, characterized in that g e k e n n -z e i c h n e t that the sliding roller for tensioning the belt with a predetermined force is resiliently pressed against the belt, odb: hVariations of the belt tension of corresponding Displacements of that roller and thus of compensating changes in the belt driving Circumferential surface of that cylinder are accompanied. Machine according to claim 1 for processing a belt on the regular Register marks are arranged at intervals, which repeat at intervals Muster' auf der Bande correspond, thereby g e -k e n n n n z e i h n e t that two rollers acting on the position of the tape are provided, over which the tape under tension on its way to that cylinder and one of which forms the above-mentioned sliding roller, and that one of the rollers for tensioning the tape is flexibly pressed against the tape under a predetermined force, wöhrand the bed of the other roller is controlled by a register control device is whose type is known per se and which the angular position of that cylinder with compares the position of the register marks on the tape approaching that cylinder and when changes are made to the assignment of these positions it takes effect to the other roller corresponding to move, whereby such deviations by compensating Changes in the circumferential surface of the cylinder driving the strip are compensated for, without practically changing the length of the tape path or the tape tension. 4. Machine according to claim j, characterized in that g e k e n n -z e i c h n e t that the roller, which is pressed resiliently against the belt, is the sliding one Forms roller, which controls that positioning means 5. machine according to claim, characterized in that the roller passing through the Register control device is determined in its position, which forms the movable roller, which controls that positioning means. 6. Machine according to at least one of Ans, ache 1 to 5, thereby g It is noted that tape guide means are provided on that cylinder are, which keep the tape so placed around the circumferential surface of the cylinder that it is not can slide towards this. 7. Machine according to claim 6, characterized in that g e k e n n -e e i c h n e t that the tape guide means have flexible belts wrapped around this surface are and are stretched against them so that they are resiliently displaceable with the radially Parts are movable. 8. Machine according to at least one of claims 1 - 7, characterized g e it is not indicated that those positioning means are located in that cylinder, which push those radially displaceable parts continuously radially inwards, as well as elements that are rotated with that cylinder and axially movable therewith are to the radially displaceable parts outward against the force of those springs to move the elements in one direction with axial movement, and which allow that those radially displaceable parts move axially that Move elements in the opposite direction radially inward, and have means, which are connected to that sliding roller, axially proportional to these elements or to move in relation to displacements of the sliding roller. 9. Machine according to at least one of claims 1-8, characterized in that g I do not notice that the cylinder is one of two co-operating Rotary cylinders, each of which has tape cutting elements on it are spaced apart in order to be in a tangency zone of the two cylinders with associated Cooperate tape cutting elements on the other cylinder, and that those radially sliding parts between the tape cutting elements on that one cylinder are arranged. 10. Machine according to claim 9, characterized in that g e k e n n -z e i c h n e t that the tape cutting elements on the one cylinder female die elements are those with cooperating pins on the other cylinder to Pefforieren the wandering ligament cooperate. 11. Machine according to claim 9, characterized in that g e k. e n n -sign e t that the tape cutting elements on one cylinder are cross-cutting knives, the interact with cutting elements working together with them on the other cylinder, around the wandering band into one Sequence of separate sheets too separate. 12. Machine according to claim 11, characterized in that g e k e n n -z e i c h n e t that that other cylinder is provided with means to the leading or starting portion of the strip passed through the tangential zone after each cross-cutting operation on its outer surface so that each sheet separated from the tape is carried away from that zone on that other cylinder. 13. Machine according to claim 12, characterized in that g e k e n n -z e i c h n e t that the two cylinders have the same angular velocity, but that one other cylinders have a larger diameter and therefore a greater peripheral speed than that first cylinder, and that the holding means allow that initial portion slips relative to the faster moving OnDeff area of that other cylinder, until the next cross cutting operation happens, creating successive sheets that separated from the tape are spaced from each other on that other cylinder. 14. Machine according to claim 13, characterized in that g e k e n n -z e i c h n e t that those retaining means have openings in the surface of that other cylinder as well Means for applying suction to that initial section through these openings of the tape. 15. Machine according to claim 13 or 14, characterized in that it is e k e n n z e i c h n e t that gripping means are arranged near the surface of the other cylinder, by that initial section when the next cross cutting operation occurs to grasp, thereby forcing the sheet, which is then separated from the tape is withdrawn from the rest of the tape. 16. Machine according to claim 15, characterized in that it is e k e n n -z e i c h n e t that these gripping means have a roller which has a segment-shaped elastic Has flange which is pressed against that surface and with inrer peripheral speed unrolls. 17. Machine according to claim at least one of claims 13-16, in that each cutting element is on that other cylinder is an anvil part or counterpressure part which cooperates with a knife Has surface which extends so curved in the direction of its rotation, that with every cutting operation a sliding attack on a knife on that one first cylinder is maintained. 18. Machine according to claim lY, characterized in that g e 1 e Ii n -z e i c h n e t, that the surface of each counterpart engaging the knife is convex around a Axis is curved between it and the axis of that other cylinder parallel to the latter. 19. Machine according to claim 17, characterized in that it is e k e n n -z e i c h n e t that the blade of each counterpart engaging the knife has a straight cutting edge which is at an angle to the axis of that other cylinder. 20. Machine according to claim 1 /, characterized g e E e n n -z e i c h n e t that the cooperating with the knife surface of each counterpart is a curved one Is cutting edge, the central portion of which points in the direction of its rotation. 21. Machine according to claim cell, characterized g e k e n n -z e i c h n e t that the cooperating with the knife surface of each counterpart one is curved cutting edge, the ends of which point in the direction of rotation. 22 Machine according to at least one of Claims 1 to 21, characterized in that g It is not noted that those radially displaceable parts are T-shaped members are that have heads with curved surfaces that are a predominant part the circumferential surface of the cylinder driving the belt. 2n. Machine according to at least one of Claims 1 to 22, characterized it is not noted that those radially displaceable links to the axial and radial movement are mounted on leaf springs in which the belt propels Cylinders are arranged inclined to its axis and that they are by spring means in that cylinder are pushed inwards and against the force of this spring means by positioning elements or Position determining elements are displaceable, which can be rotated with the cylinder and are axially displaceable with respect to this.