Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H1/00—Supports or magazines for piles from which articles are to be separated
  • B65H1/08—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device
  • B65H1/22—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device moving in direction of plane of articles, e.g. for bodily advancement of fanned-out piles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
  • B65H29/66—Advancing articles in overlapping streams
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
  • B65H29/68—Reducing the speed of articles as they advance
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H33/00—Forming counted batches in delivery pile or stream of articles
  • B65H33/12—Forming counted batches in delivery pile or stream of articles by creating gaps in the stream

Definitions

• the present invention relates to a method and an apparatus for discharging a predetermined number of sheets from a group of sheets, the group of sheets comprising a plurality of sheets which are shingled in a sheet direction so that in Paper direction leading edges of the sheets in the group are spaced apart by an offset.
• paper handling systems are known in which, for example, 2-use printed sheets are fed to a cutting machine, are separated by them, and are then provided for further processing.
• the 2-up printed sheets are printed using suitable machines, e.g. Mergers, laid one on top of the other and are thus available for further processing on subsequent paper handling machines.
• the following machines take over one sheet provided per machine cycle, with individual groups having to be formed, for example, from the sheets provided, which are then, for example, inserted, depending on the downstream machines.
• the clock cycle with which the cutting machine works and with which the individual sheets are provided to the subsequent machines is higher than the clock cycle of a subsequent inserter.
• the cutting patterns can cut 1000 times, while the inserter can insert 100 times. This leads to the fact that in a first case, in which the inserter only processes single sheets, the cutting machine is stopped regularly because too many sheets would be provided by it, whereas in a second case, in which the inserter inserts fifteen sheets at a time, the inserter must be stopped regularly because the cutter cannot supply enough sheets. Solutions are already known in the prior art which, in order to avoid the disadvantages associated therewith, connect a buffer between the cutting machine and the subsequent machines, so as to enable continuous operation of the cutting machine.
• the individual sheets output by the cutting machine are entered into the buffer, and after reaching a predetermined number of sheets, for example, a switch is made to a second buffer level, so that the sheets contained in the first buffer level can be fed for further processing while simultaneously sheets output from the cutter are fed into the second buffer.
• a switch is made to a second buffer level, so that the sheets contained in the first buffer level can be fed for further processing while simultaneously sheets output from the cutter are fed into the second buffer.
• DE-OS 2 207 175 shows a device for forming stacks.
• a first conveyor belt is supplied with clocked single sheets, which are deposited in a scaled form on the first section of the conveyor belt depending on the cycle.
• a take-off mechanism is moved over a carriage, with an oscillating carriage movement being provided so that no specimen is pulled onto a faster-running, further conveyor belt during the entire carriage advance, and so that specimens caught by a roll are fed to the collecting magazine at increased speed during the carriage return , This creates a gap in the further transport on the conveyor belt.
• the present invention seeks to provide a method and an apparatus that support simple and accelerated group formation with a minimum number of required machine cycles in paper handling systems.
• the present invention provides a method of discharging a predetermined number of sheets from a group of sheets, the group of sheets comprising a plurality of sheets which are shingled in a sheet running direction such that leading sheets in the sheet running direction Edges of the sheets in the group are spaced by an offset, with the following step:
• a respective front sheet in the sheet running direction is output from the group of sheets as soon as the respective front sheet reaches an output unit due to the movement.
• the present invention provides an apparatus for discharging a predetermined number of sheets from a group of sheets from a sheet handling machine, the group of sheets comprising a plurality of sheets which are arranged in a first transport unit in a sheet traveling direction so that the leading sheets in the sheet traveling direction Edges of the sheets in the group are spaced by an offset,
• the transport unit moves the group of sheets in the sheet running direction toward an output unit by a predetermined distance depending on the number of sheets to be discharged and the offset of the sheets, and
• the output unit outputs a front sheet from the group of sheets in the sheet travel direction as soon as the respective front sheet reaches the output unit due to the movement.
• the present invention is based on the knowledge that the above-described disadvantages in the prior art can be overcome by the type of output of the sheets to be processed according to the invention, since the 2-use printed sheets, which are superimposed (pre-scaled) with a small longitudinal offset, easily are to be separated. Larger groups can be formed in a simple manner by forming a larger stream of flakes with further, already pre-scaled leaves.
• the machines known in the prior art do not allow such a procedure, but only enable the formation of the scale flow from single sheets or with a non-offset double benefit.
• the present invention has the advantage that a predetermined number of sheets can be output in the form of a group by the method and the device according to the invention in a simple manner by slightly extending the cycle.
• the first speed is equal to the third speed.
• a transport unit in which the sheets are stored in a scaled manner.
• the transport unit moves, depending on the number of sheets to be dispensed, clocked the shingled stream so that it is moved in the direction of an output unit, the front sheet in the paper travel direction being dispensed from the paper handling machine on the dispensing unit.
• a further transport unit is connected upstream of the transport unit, in which sheets are continuously collected and deposited in shingled form and are transferred to the transport unit after reaching a predetermined number of sheets.
• at least two sheets already arranged in a shingled manner are taken over into a paper handling machine in one cycle, without these pre-shingled sheets slipping together again, as would be the case in the prior art. This is achieved by braking the leading sheet on the leading edge of the sheet and the trailing sheet on the trailing edge of the sheet. This continuous intake of the merged leaves results in a high increase in performance.
• a method which enables the provision of at least two sheets in scaled form is described in DE 199 35 186 A.
• the present invention enables operation of a paper handling machine with a medium group size, the number of sheets per group being between the above-mentioned limits at which a precursor machine (e.g. cutting machine) or a post machine (e.g., inserting machine) is stopped must become.
• a precursor machine e.g. cutting machine
• a post machine e.g., inserting machine
• FIG. 1 is a schematic illustration of a paper handling system in which the present invention is implemented
• 2A-2E schematically illustrate the operation of a first section of a paper handling machine
• FIG. 3 is a side view of the second section of the paper handling machine
• FIG. 5 is a side view of the first section of the paper handling machine, which is a first embodiment.
• Figure 6 is a side view of the paper handling machine with the portions shown in Figures 3 and 5;
• FIG. 1 schematically shows an example of a paper handling system which essentially comprises four separate sections AD.
• section A of the paper handling system 2-sheet printed sheets 100 are fed to a cutting machine, and the paper web is cut lengthways and crosswise to obtain the single sheets 100a and 100b, which in section B are merged in such a way that sheets 100a and 100b are arranged in a shingled manner relative to one another, that is to say are shifted by a predetermined offset (scale length) X in a sheet or paper running direction P.
• the two shingled sheets 100a and 100b are transferred to section C, in which the supplied sheets are buffered before being e.g. passed on to a collecting station.
• Section C is divided into sections Cl and C2, section Cl representing a section of the sheet or paper handling machine which 3 is described in more detail.
• Section C2 also represents a section of the paper handling machine, which is described in more detail below with reference to FIG. 5.
• Section C as a whole represents the paper handling machine described later in FIG. 6.
• section C1 the shingled sheets 100a and 100b are fed continuously until a predetermined number is reached, and then the shingled stream thus formed is transferred in a single cycle to section C2, from which individual sheets or groups of sheets are then clocked be fed to the collecting station, as will be described in detail later.
• Group 1 shows in section A and B, by way of example, how single sheets or groups of sheets are arranged in the double-up. Sheets belonging to the same group are labeled with the same lower case letters. Group a comprises only one sheet, group b comprises two sheets and group c comprises three sheets.
• the present invention in the simplest way enables the transfer of flaked sheets into section C and the output of the sheets in groups to the subsequent processing machines D.
• FIGS. 3 and 5 An exemplary paper handling machine that implements the present invention is described with reference to the following figures.
• the individual components of the machine are first described in FIGS. 3 and 5, the functioning of which is explained schematically in advance using FIGS. 2 and 4.
• the present invention is based on sheets that have already been arranged in a shingled manner. For the sake of safety, it is assumed that only two shingled leaves are to be taken over.
• a method for taking over shingled leaves is generally described, it being initially assumed, for the sake of simplicity, that only two shingled leaves are to be taken over.
• FIG. 2A schematically shows the situation in which a first sheet 200 and a second sheet 202 are fed in a paper or sheet running direction to a paper handling machine, which is not shown in detail.
• the first sheet 200 and the second sheet 202 are arranged shifted in the paper running direction P by the offset X already described, that is to say they have a scale length X which in a preferred exemplary embodiment is 20 mm, but in the range of 10 mm can be up to 50 mm.
• the offset X or the scale length X is defined by the distance between the front edge 200a of the first sheet 200 in the paper running direction P and the edge 202a of the second sheet leading in the paper running direction P.
• FIG. 2a also schematically shows a first scale roller 204, which is fixedly arranged with respect to the leaves 200 and 202.
• the scale roller 204 is part of a first transport unit, which is described in more detail in the following figures.
• a brake roller 206 is shown schematically, which is movable with respect to the blades 200 and 202 between a first position and a second position, the brake roller 206 in FIG. 2A being in its first position, in which it with the blades 200 and 202 is not engaged.
• the sheets 200 and 202 are fed by a feed device (not shown in FIG. 2) at a first speed, which according to a preferred embodiment Example is about 3 m / s, but can also be in the range of 2 m / s to 3 m / s.
• the scale roller 204 is part of the transport unit to be described below, which moves the picked up or taken over sheets at a speed which is preferably approximately 0.25 m / s, but in the range of 0.2 m / s s can be up to 2 m / s.
• the brake roller 206 When the sheets 200, 202 reach the scale roller 204, they are braked by their feed speed and, in order to prevent the two sheets 200 and 202 from sliding over one another, the brake roller 206 is moved from its first position shown in FIG. 2A to its position in FIG Fig. 2B switched position, in which it engages with a rear edge 202b of the second sheet 202 in the paper travel direction and brakes it, so that the scaled arrangement of the two sheets 200 and 202 is maintained.
• the brake roller causes the second blade 202 to be braked to a speed of approximately 2 m / s, but this speed can also be in the range from 0.2 m / s to 2 m / s.
• the brake roller 206 is switched over as soon as the first sheet 206 has reached the scale roller 204.
• the first speed (feed speed) is equal to the third speed (braking speed). This situation is preferred because in this case there is ideal behavior during the takeover.
• the scale length of the sheets taken over is equal to the scale length of the sheets lying against the device.
• the transport unit for moving the taken over Sheets are continuously driven, and after reaching the first scale roll 204, the two sheets are moved a distance equal to the number of sheets times the scale length X.
• FIG. 2C This situation is shown in FIG. 2C together with the introduction of further sheets into the paper handling machine.
• the sheets 200 and 200a have already been moved a first part of the distance between the first scale roll 204 and a second scale roll 208, the distance between the two scale rolls 204 and 208 being equal to the number of sheets times the scale length.
• the scale rollers are arranged so as to be adjustable so that different formats can be handled.
• the distance between the rolls is smaller than the smallest possible form height (format length or length of a sheet measured in the direction of paper travel). With a format length of 3.5 "(8.89 cm), the distance is 3" (7.62 cm), so that the sheet is securely gripped by the following roll during further transport.
• FIG. 2D the sheets 200 and 202 were moved on from the situation in FIG. 2C, so that the sheet 200 now abuts the scale roller 208.
• the new sheet 210 with its leading edge 210a in the paper feed direction, reaches and is braked on the first scale roller 204, and at the same time the brake roller 206 is actuated, which is switched from its first to its second position, with a rear edge 212b in the paper feed direction to engage the second blade 212 in order to brake this blade in the manner already described above, so as to prevent the new sheets 210 and 212 from sliding together.
• FIG. 2E shows a further example in which four sheets 214, 216, 218, 220 are fed instead of the two sheets described so far.
• 2E shows the situation in which the sheet 214 has already reached the scale roller 204, so that the supplied sheets are braked.
• the brake roller 206 was moved to the second position shown in Fig. 2E, so that the sheets 216-220 a braking effect is exerted so that they do not shift.
• FIG. 1 A first section of the paper handling machine is shown in FIG. 1
• the section of the device shown in FIG. 3 is provided with the reference number 300 in its entirety.
• the section 300 comprises an inlet section 302 and a first transport unit 304.
• the inlet section 302 comprises an inlet 306, which is formed by two guides 306a and 306b converging in the paper direction P, and serves to feed the at least two sheets in the paper direction P to the section 300.
• a pair of feed rollers 308a, 308b are arranged adjacent to the front ends of the guides 306a and 306b in the paper feed direction P, the feed roller 308a being driven by a motor (not shown in FIG. 3).
• the pressure force between the rollers 308a and 308b can be adjusted via an adjusting screw 310, by means of which the position of the roller 308b with respect to the roller 308a can be changed.
• the rollers 308a and 308b are attached to a frame 312 of the inlet section 302.
• the feed rollers 308a and 308b are driven in such a way that fed sheet ter at a speed of 2 m / s to 6 m / s, preferably 3 m / s.
• the trap 314 comprises a deflection element 316, as well as two deflection guides 318a and 318b arranged adjacent to the deflection element.
• the deflection device 316 can be switched between the position shown in FIG. 3, in which its rear paper tip is arranged adjacent to the feed roller 308a, in a second position, in which the paper feed tip rear of the deflection device 316 is adjacent to the roller 308b is shown.
• the deflection device 316 and the respective deflection guide 318a or 318b form a first sheet path 320a or a second sheet path 320b, via which the supplied sheets are moved in the direction of the transport unit 304.
• the trap 314 makes it possible, depending on the position of the trap, to move the supplied "double sheets" in a descending or descending manner in the direction of the transport unit 304.
• a brake roller 323a and 323b is assigned to each of the leaf paths 320a and 320b.
• a magnetic actuator 324a and 324b By actuating a magnetic actuator 324a and 324b, the respective brake roller 322a and 322b is moved from its first position, in which there is no engagement with the sheets fed through the sheet paths, to its second position, in which one engages with the respective rear edge of the second sheet of the fed sheets is done to slow it down.
• the two brake rollers 322a and 322b are driven by a motor (not shown in FIG. 3), the braking speed being in the range from 0.2 m / s to 2 m / s, preferably at 2 m / s.
• the brake roller 322a becomes the first one after the activation of the actuator 324a by the gravitational force Moved back position, whereas the roller 322b is moved back to its rest or first position by the restoring force of a spring 326 after the activation of the actuator 324b has ended.
• a spring is also assigned to this.
• the rollers 330a and 330b are carried in a frame 332, which is shown schematically in FIG. 3.
• Four scale rollers 334a-334d are further provided which are arranged in contact with the conveyor belt 328 and are spaced apart from one another by a distance which is dependent on the number of sheets fed simultaneously and the offset of the sheets.
• the individual scale rollers 334a-334d are movably (see arrow 336) attached to a chain 338, which is shown schematically in FIG. 3.
• the chain shown schematically is guided over transport rollers 340a and 340b, also shown schematically.
• the chain in conjunction with the scale rollers, serves to adjust the transport unit 304 to certain formats of the sheets.
• the transport unit described is only shown schematically, and it is obvious that the number and the distance of the rolls depends on the sheets or sheet formats used (form height) and the number of sheets to be picked up. An example is shown in the figure in which the rollers are spaced 3 "(7.62 cm) apart.
• the transport unit 304 also includes, for secure transfer would take the fed double sheets from the inlet 302, two parallel guides 342 and 344, which extend along the entire transport unit 304.
• section 300 is such that the double sheets are fed through inlet 306, and as soon as the first of the double sheets reaches the first scale roll 334a, the double sheets are braked and to prevent the sheets from slipping on one another at that time
• one of the brake rollers 322a and 322b is activated by an operation of the corresponding actuator so as to engage a rear edge of the second sheet of the double sheets so that the sheets slide together is avoided.
• the sheets are then moved further by the transport unit 304, with further double sheets being fed in at the same time until a predetermined number of double sheets are contained in the transport unit 304. As soon as the predetermined number of sheets is contained in the unit 304, these are passed on in one cycle to a subsequent transport unit, which will be described later.
• the provision of the trap and the associated double design of the brake rollers 322a and 322b are optional.
• the trap can be omitted completely, for example, or the double brake rollers can be replaced, for example, by a single brake roller, which is arranged downstream of the trap.
• a brake roller can be used which has an increased running resistance compared to conventional rollers, so that a corresponding deceleration of the same is achieved by pressing the latter against a rear edge on the second sheet.
• FIGS. 4A to 4C A first exemplary embodiment of the method according to the invention and a second section of the paper handling machine are explained schematically with reference to FIGS. 4A to 4C.
• the portion of the paper handling machine shown in Fig. 4 serves to easily eject a predetermined number of sheets arranged in a transport unit (not shown).
• FIG. 4A schematically shows a transport roller 400 and an output roller 402 arranged last in the paper running direction P.
• a transport roller 400 and an output roller 402 arranged last in the paper running direction P.
• the individual sheets 410 to 416 are arranged in such a way that their front edges in the paper running direction P are offset by the distance X.
• FIG. 4B shows the situation in which only a single sheet, namely sheet 410, is to be output from the sheet stream shown in FIG. 4A. This is done by the transport unit causing the sheet flow to move a predetermined distance so that only the leading edge of the first sheet 410 is brought into contact with the output roller 402. As a result of this clocked movement of the sheets and due to the continuous movement of the discharge roller 402, as indicated in FIG. 4B by the arrow, the sheet 410 is discharged from the sheet stream.
• FIG. 4C shows the situation in which a group of sheets, namely sheets 412 and 414, are to be removed from the sheet stream, in which case the transport device also causes the sheets or sheet stream to move, the moving distance is determined by the number of leaves in the group and by the offset of the leaves.
• This clocked movement has the effect that first the now first sheet 412 is brought in the sheet stream to the output roller 402 and through this is removed, and subsequently the sheet 414 is brought to the exit roller 402 and is also removed.
• This type of output of the individual sheets from the sheet stream makes it possible to achieve the grouping of the individual sheets already illustrated with reference to FIG. 1 in a simple manner, namely by firstly outputting the single sheet a by the now existing scale stream or sheet stream by the offset X is moved so that only the sheet a is applied to the output rollers 402 during this movement.
• the movement of the shingled stream subsequently takes place at a somewhat greater distance, which is brought about by a cycle which is somewhat longer than the first cycle, so that the two sheets of group b are successively applied to the output rollers.
• the sheets of group c are output in groups.
• FIG. 5 shows the section which is described schematically with reference to FIG. 4 in an embodiment according to an embodiment.
• the section 500 comprises a second transport unit 502 and an output unit 504.
• the second transport unit 502 comprises a pair of guides 506 and 508 which extend from an input of the transport unit 502 to an output 512 thereof.
• the transport unit 502 further comprises a conveyor belt 514, which can be driven in a clocked manner by a motor, which is not shown in FIG. 5, and is carried over two rollers 516a and 516b.
• the rollers 516a and 516b are their attached to a frame 518, as shown schematically in Fig. 5.
• transport rollers 520a to 520d are provided, which interact with the transport belt 514 and are arranged displaced from one another by a predetermined distance.
• the individual transport rollers 520a to 520d are fastened to a chain 522, which is shown schematically in FIG. 5, the chain 522 in turn being guided over rollers 524a and 524b, also shown schematically.
• the rollers can be moved accordingly in order to enable adjustment to different formats.
• the transport unit described is only shown schematically, and it is obvious that the number and the distance of the rolls depends on the sheets or sheet formats used (form height) and the number of sheets to be picked up. An example is shown in the figure in which the rollers are spaced 3 "(7.62 cm) apart.
• the sheets picked up in the first transport unit shown in FIG. 3 are introduced as soon as the first transport unit has picked up the maximum possible or a predetermined number of sheets.
• the individual sheets are arranged in a scaled manner relative to one another and have a predetermined offset with respect to their respective front edges in the paper running direction.
• the output unit 504 is connected to the output 512 of the second transport unit 502 with its input 528, a stop device 530 being provided immediately after the input 528 and being attached to a section of the frame 532 of the output unit 504.
• the stopper device enables a group of sheets to be stopped or provided. Is the subsequent paper handling machine, e.g. the collecting station, riding, and if the sheets were provided at the stop or stopper device, the way to the collecting station is shorter, which enables a further increase in performance.
• an inserter downstream of the paper handling device is assumed. While this is inserting a group of sheets or single sheets located therein, no further sheets are output to the inserter.
• the stopper device can already move the next group or the next sheet to be processed in the direction of the exit of the paper handling machine and provide it at the stopper, so that when the inserter for receiving the next group or the next Sheet is ready, the distance to be bridged is shorter than with a feed from the second transport unit, so that the feed is faster.
• the stopper device opens up the possibility of "buffering" (buffering) a group, while the shingled stream in the example shown in FIG. 6A from the first transport unit to the second transport unit is handed over.
• the slightly longer intermediate cycle which may be required for the transfer, does not reduce performance.
• a pair of sensor rollers 534a and 534b is arranged behind the stop device 530 in the paper running direction P, by means of which the sheets passing between the two rollers 534a and 534b are counted.
• the counting is carried out in such a way that a corresponding spacing of the two rollers 534a and 534b is caused by the sheets passing through, which in turn causes the signaling lever 536 to be displaced with respect to an inductive measuring element 538, which results in a change in the inductance due to the number of sheets passing between the rollers 534a and 534b can be detected.
• the sensor can also be arranged in front of the output 512.
• rollers 534a and 540b which are driven continuously by motors, not shown in FIG. 5, at a predetermined speed, which is in the range from 2 m / s to 5 m / s, are preferably located at 4.75 m / s.
• Rollers 534 and 540 are attached to frame 532 of section 504.
• the exit rollers 540a, 540b and the last feed roller 520d are spaced a distance m that ensures that the sheet is engaged by the exit rollers when the shingled stream is moved.
• the distance between the rolls is smaller than the smallest possible form height (format length or length of a sheet measured in the direction of paper travel). With a format length of 3.5 "(8.89 cm), the distance is 3" (7.62 cm), so that the sheet is securely gripped by the following roll during further transport.
• section 500 it is first determined how many of the sheets contained in transport unit 502 are to be output to a subsequent processing device during a cycle. Depending on the number of sheets to be discharged, it is determined by how far the shingled stream arranged in the transport unit 502 is to be moved in the direction of the discharge unit, and this movement is then carried out, with the discharging rollers 540a and 540b pulling off the respective front sheet of the shingled stream in the direction of paper travel.
• the shingled stream is correspondingly moved by means of the transport unit 502 in such a way that only the foremost of the sheets is provided to the output rollers 540a and 540, so that during this cycle only this single sheet is output.
• the stream of shingles is moved for a period which is somewhat longer than the cycle time for the output of a single sheet, but is significantly lower than for the output of two separate sheets, so that the sheets arriving in this case one after the other at the output rollers are fed to the subsequent processing unit.
• a group is provided within a period of time that is significantly shorter than the time period that is conventionally required, for example, to feed three individual sheets for a group to a subsequent processing unit.
• the sheets are accelerated more in order to achieve the highest possible speed when dispensing.
• FIG. 6A shows the entire paper handling machine 600, and as can be seen, it is composed of the section 300 and the section 500, the section 500 following the section 300 in the paper running direction P.
• the configuration of the paper handling machine shown in FIG. 6A instead of the configuration of the paper handling machine shown in FIG. 6A, however, other configurations are also possible.
• FIG. 6B shows a further exemplary embodiment of the paper handling machine 602, in which the transport units 304 and 502 are arranged parallel to one another, between the inlet unit 302 and the output unit 504.
• a deflection device 604 is arranged between the inlet unit 302 and the two transport units 304 and 502 , which is effective to first feed double sheets of one of the two transport devices. As soon as the predetermined or maximum possible number of sheets is received in one of the transport devices, the deflection device is switched over to the other of the two transport units, and the double sheets are fed to the further transport unit in a continuous form. At the same time, the operation of the first transport unit is switched from continuously to clocked, and the predetermined number of sheets forwarded in groups in the manner described above clocked via the device 606 to the output unit 504.
• FIG. 7A shows the two transport units 304 and 502, the corresponding setting of the formats being achieved by a corresponding increase and reduction in the number of scale rollers 334 or transport rollers 520. Depending on the format, more or fewer roles are used.
• 7B shows the transport units 304 and 502, in which case the transport belts are realized by so-called vacuum belts.
• 7C shows a further embodiment in which the transport units 304 and 502 are made in one piece.
• 7D shows a further exemplary embodiment for setting the format.
• the 2-ply printed sheets are placed on top of each other, with a slight longitudinal offset, so that these sheets are pre-scaled and later easy to separate. If larger groups are formed, a larger stream of scales is formed with the further, pre-scaled leaves. In the machines known from the prior art, this is only possible with single sheets or with non-offset double benefit. Staggered, ie pre-scaled leaves would slide together again in such machines. As described above, this problem is solved by braking the leading sheet on the leading edge of the sheet and the trailing sheet on the trailing edge of the sheet. For the further transport of the group, the stream of shingles is moved to a subsequent transport which takes over the group, the path by which the stream of shingles is moved equal to the number of leaves times the length of the shed.
• the paper handling machine described above enables the continuous entry of merged sheets and thus a high increase in performance, since even if the sheets within the merged sheets are separated, the precursor can output them together. This means that only one cycle is required. This enables the use of continuously running precursors, e.g. Rotary cutting machines, among other things, which means a further increase in performance.
• a paper handling machine which essentially consists of a feed transport with brake, a trap, a scales transport, and an output transport, as described above with reference to the figures.
• the feed transport device with a brake serves to prevent the incoming sheets from slipping or being damaged, and, as has already been described, the scale transports can be arranged on two levels and can be operated independently of one another.
• a paper web is first cut lengthways and crossways in a cutting machine (FIG. 1).
• the sheets cut in this way are placed side by side in pairs hand over the merger (Fig. 1), which overlaps the sheets with a slight longitudinal offset.
• the sheets (merged) guided one above the other by the precursor are taken over by the feed transport 302 of the paper handling machine with a small longitudinal offset of approximately 20 mm.
• the leading edge of the leading sheet is braked on the scale roller 334a, the trailing sheet is braked on the trailing edge. This prevents the sheets from being pushed over one another again.
• optionally scaled ascending or descending, further “double sheets” are continuously transported into the transport unit 304 of the buffer until the distance is completely filled.
• the transport units or buffers are arranged one behind the other, the newly formed scale flow in the first transport unit 302 after reaching a predetermined number of sheets, and when the second transport unit has been emptied, in an intermediate cycle completely from the first transport unit to the second transport unit is handed over.
• the switching device 604 is activated when the filling state of the first transport unit 302 is reached, so that while the sheets are now entering the second level in the manner described above, the first level is emptied in a clocked manner.
• rapid group formation can be achieved at a low speed by the pre-clutching.
• paired or unpaired groups there are no differences in performance, large groups can be handled with only a slightly longer cycle, start-stop operation of the cutting machine is avoided, so that there is a higher sheet output, and there is a low risk of operation due to the relatively low transport speeds.

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• 1999
  • 1999-08-25 DE DE19940405A patent/DE19940405C2/de not_active Expired - Fee Related
• 2000
  • 2000-08-10 DE DE50004096T patent/DE50004096D1/de not_active Expired - Lifetime
  • 2000-08-10 ES ES00958420T patent/ES2204680T3/es not_active Expired - Lifetime
  • 2000-08-10 EP EP00958420A patent/EP1206402B1/fr not_active Expired - Lifetime
  • 2000-08-10 AT AT00958420T patent/ATE252041T1/de not_active IP Right Cessation
  • 2000-08-10 US US10/069,411 patent/US6942216B1/en not_active Expired - Fee Related
  • 2000-08-10 WO PCT/EP2000/007800 patent/WO2001014229A1/fr active IP Right Grant

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