EP4320060B1 - Machine d'impression comportant plusieurs stations de traitement des feuilles - Google Patents

Machine d'impression comportant plusieurs stations de traitement des feuilles Download PDF

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Publication number
EP4320060B1
EP4320060B1 EP22737433.7A EP22737433A EP4320060B1 EP 4320060 B1 EP4320060 B1 EP 4320060B1 EP 22737433 A EP22737433 A EP 22737433A EP 4320060 B1 EP4320060 B1 EP 4320060B1
Authority
EP
European Patent Office
Prior art keywords
sheets
transport
suction belt
suction
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP22737433.7A
Other languages
German (de)
English (en)
Other versions
EP4320060A1 (fr
Inventor
Heinz Michael Koch
Benjamin GOHL
Volker Kessler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer AG
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Filing date
Publication date
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP4320060A1 publication Critical patent/EP4320060A1/fr
Application granted granted Critical
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Active legal-status Critical Current
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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
    • B65H11/00—Feed tables
    • B65H11/002—Feed tables incorporating transport belts
    • B65H11/005—Suction belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/54—Auxiliary folding, cutting, collecting or depositing of sheets or webs
    • B41F13/64—Collecting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/001—Apparatus or machines for carrying out printing operations combined with other operations with means for coating or laminating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/007—Apparatus or machines for carrying out printing operations combined with other operations with selective printing mechanisms, e.g. ink-jet or thermal printers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
    • B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
    • B41F23/0456—Drying sheets, e.g. between two printing stations by radiation by infrared dryers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/0463—Drying sheets, e.g. between two printing stations by convection
    • B41F23/0466—Drying sheets, e.g. between two printing stations by convection by using heated air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0476—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0483—Drying combined with cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/08—Print finishing devices, e.g. for glossing prints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/06—Tripping devices or stop-motions for starting or stopping operation of sheet or web feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0085—Using suction for maintaining printing material flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/0009—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/009—Diverting sheets at a section where at least two sheet conveying paths converge, e.g. by a movable switching guide that blocks access to one conveying path and guides the sheet to another path, e.g. when a sheet conveying direction is reversed after printing on the front of the sheet has been finished and the sheet is guided to a sheet turning path for printing on the back
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/08—Conveyor bands or like feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
    • B41J3/546—Combination of different types, e.g. using a thermal transfer head and an inkjet print head
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/02—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains
    • B65H5/021—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
    • B65H5/222—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices
    • B65H5/224—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices by suction belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/36—Article guides or smoothers, e.g. movable in operation
    • B65H5/38—Article guides or smoothers, e.g. movable in operation immovable in operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/12—Adjusting leading edges, e.g. front stops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/61—Longitudinally-extending strips, tubes, plates, or wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/12—Means using fluid made only for exhausting gaseous medium producing gas blast
    • B65H2406/122—Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to a printing machine with a non-impact printing device according to claim 1.
  • the suction belt table described below is a machine unit for use in a machine arrangement for processing sheet-shaped substrates (referred to as sheets for short), such a machine arrangement having several machine units arranged one after the other in the transport direction of the sheets. At least two of these machine units each have the transport devices that transport the sheets.
  • a suction belt table is used to transport processed sheets or sheets to be processed along a linear transport path in the machine arrangement in question, these sheets being transported individually on at least one conveyor belt.
  • the individual sheets are held frictionally or force-fittedly on the conveyor belt in question while they are resting on the at least one conveyor belt by a suction force, i.e. by a holding force caused by a suction flow.
  • the suction force is usually achieved by a negative pressure acting on the respective sheet with reference to the surrounding barometric air pressure using a suction device.
  • the suction belt table in a sheet-processing machine arrangement is arranged in the transport direction of the sheets after a dryer that dries the sheets.
  • the dryer is first followed by a cooling section for air-conditioning and/or conditioning the sheets heated in the dryer, so that the suction belt table is only arranged after the cooling section.
  • a machine arrangement of the aforementioned type, whether with or without a cooling section after the dryer, has several in the transport direction of the sheets one after the other. arranged processing stations each acting on the sheets, each of these processing stations being designed, for example, as a machine unit in this machine arrangement for processing sheets.
  • the suction belt table can - as mentioned - be arranged immediately after the dryer, so that no further processing station is arranged between the aforementioned dryer and the suction belt table, or only after the cooling section designed after the dryer.
  • at least the transport device of the dryer arranged upstream of the suction belt table or the associated cooling section is designed as a transport device that transports the sheets lying down along a linear transport path.
  • the dryer is thus designed in particular as a continuous dryer for sheets in individual layers.
  • a further transport device arranged downstream of the suction belt table in the transport direction of the sheets is designed as a transport device that transports the sheets along a preferably curved, in particular circular-arc-shaped transport path.
  • This further transport device is preferably arranged immediately after the suction belt table, i.e. no further processing station is arranged between the suction belt table and the downstream transport device in the machine arrangement in question.
  • the sheets to be transported by this machine arrangement thus change from a linear transport path to a preferably curved, in particular circular-arc-shaped transport path after they leave the suction belt table.
  • changing from a linear transport path to a preferably curved, in particular circular-arc-shaped transport path on a suction belt table is sometimes very problematic.
  • a sheet transport arrangement for transporting a sheet along a process unit which is used to apply a process to the sheet is configured, the sheet transport arrangement comprising: a conveyor unit comprising a transport belt and a deflection element, the transport belt being configured to advance the sheet in a transport direction along the process unit to the deflection element, the sheet being placed with a feed side on the belt and with a process side towards the process unit, the deflection element being arranged in contact with the transport belt to deflect the transport belt downstream in the transport direction relative to the process unit; a separating unit for separating the sheet from the conveyor belt, the separating unit being connected to an air supply source and comprising a holding blower arranged in a holding region for directing a holding air flow to the process side of the sheet to drive the sheet towards the conveyor belt near the deflection element arranged to separate the sheet from the conveyor belt, and comprising a lifting blower arranged in a lifting region for directing a lifting air flow to the contact side of
  • a printing machine comprising a first conveyor belt and a downstream second conveyor belt for transporting sheets and a guide element for the sheets in between, wherein a blowing device is provided for lifting a front edge of the respective sheet in the region of the transition from the first conveyor belt to the guide element, wherein the blowing device is preferably arranged in front of the guide element as seen in the transport direction of the sheets.
  • a sheet processing machine wherein at least one protrusion sensor for detecting at least one spatial extension of sheets is arranged along a transport path provided for transporting sheets, and wherein at least one compression device is arranged, which has at least one first compression body and at least one second compression body and at least one force element, and wherein the at least one first compression body is arranged to be movable by means of the at least one force element from a passage position towards the at least one second compression body into a compression position, and wherein when the first compression element is arranged in the passage position, the at least one force element is prestressed, and wherein the at least one compression device has at least one retaining device which can be switched at least between a retaining state and a release state and which in the retaining state allows a movement of the at least one first compression body from its passage position into its compression position.
  • the invention is based on the object of creating a printing press with a non-impact printing device.
  • a second dryer 17 that dries the printed sheets is arranged downstream of the non-impact printing device 13, with this second dryer 17 also being able to e.g. B. as a hot air dryer and/or as a dryer drying by IR radiation or by UV radiation.
  • the second dryer 17 has a transport device 18 which transports the sheets lying down in a translational manner, ie along a linear transport path. This transport device 18 is in the Fig. 1
  • the third conveyor belt 18 is also designed as a circulating endless belt.
  • the suction holes 53 in the switching area 52 form and open a fluidic connection to at least one of the preferably several suction chambers 41 each arranged below the conveying plane E19 of the suction belt table 19, whereby these suction chambers 41 are controlled by the control unit 71 in particular, their respective pressure is switched or at least switchable individually and independently of one another, so that a negative pressure can be set or at least adjusted in this switching area 52 by means of the suction bores 53 and by the respective adjustment of the pressure in the relevant suction chamber 41 in the conveying plane E19 of the suction belt table 19.
  • the suction bores 53 arranged in the switching area 52 are, for example, symmetrical to the center line M of the conveying plane E19 of the suction belt table 19 in several rows, for example in two rows, and each is designed, for example, as a suction cup utilizing the Bernoulli effect.
  • the switching area 52 is adjoined, for example. B. in an overlapping manner with the switching area 52 at least one feed belt 54, in particular designed as a suction belt, wherein the suction belt has a perforation at least in sections, wherein the at least one feed belt 54 extends in the transport direction T of the sheets preferably to below the blow box 37 of the shingling device.
  • the at least one feed belt 54 is preferably designed as a circulating endless belt.
  • several, e.g. two, feed belts 54 are provided symmetrically to the center line M of the conveying plane E19 of the suction belt table 19.
  • braking belts 56 which are arranged symmetrically to their center line M and are preferably designed as a continuous endless belt, which have the function of controlling the respective transport speed of the approaching to a swing gripper 21.
  • the sheets are then gripped as they continue to move in the transport direction T by a rotating or at least rotatable suction roller 57 subjected to negative pressure by a suction device, with this suction roller 57 extending transversely to the transport direction T of the sheets, preferably at least over the entire width of the sheets or over the entire width B19 of the suction belt table 19.
  • Each of the sheets then arrives one after the other, individually held by the suction roller 57, with its front edge in the transport direction T, i.e. its front edge, e.g. B. to the front lays 36 of the oscillating gripper 21 arranged immediately downstream of the suction belt table 19.
  • the sheets which were previously transported individually, one behind the other, with a gap between them, are transferred into a shingled stream before these sheets are transferred to a transport device arranged immediately downstream of the suction belt table 19, e.g. to an oscillating gripper 21, in order to then be transported in a rotary manner in a machine arrangement designed as a digital printing machine having this suction belt table 19 to a coating device 22, e.g. to a coating device 22 designed as a varnishing device, and through this.
  • a malfunction can occur for various reasons in a processing station downstream of the suction belt table 19, e.g. designed as a coating device 22.
  • a serious malfunction in such a processing station results in the transfer of sheets to the transport device downstream of the suction belt table 19 having to be abruptly interrupted.
  • This operating case forms a stopper.
  • a stopper the following must be done in the Machine arrangement, sheets being transported can be collected and stacked very quickly and effectively.
  • a suction belt table 19 with a catching device 58 is therefore proposed, with which catching device 58 individual sheets following one another in a sequence are caught and stacked on the suction belt table 19 before they are transferred to a transport device arranged downstream of the suction belt table 19.
  • this suction belt table 19 which preferably has an under-shingling device, is arranged in the transport direction T of the sheets after a dryer 17 arranged downstream of a non-impact printing device 13.
  • the suction belt table 19 is arranged in a machine arrangement at a point at which the sheets are transferred from a linear transport path arranged immediately upstream of this suction belt table 19 to a curved, in particular circular-arc-shaped, transport path arranged immediately downstream of this suction belt table 19.
  • the proposed catching device 58 has a slider crank mechanism, the coupling of which has at least one stop surface 66 for the sheets to be caught. Details of the catching device 58 and its functionality are explained below using the Fig. 4 to 6 described.
  • Fig. 4 shows an example of a side view of the catching device 58.
  • This catching device 58 is arranged, as long as it is inactive, ie not actuated by the control unit 71, below the conveying plane E19 of the suction belt table 19, preferably approximately one sheet length extending in the transport direction T of the sheets from a line drawn by the catching blower 51 perpendicular to the conveying plane E19 of the suction belt table 19 corresponding to the distance A51 at the end of the switching area 52 of this suction belt table 19 having suction holes 53.
  • the catching device 58 has a drive 59, which is preferably designed as a double-acting pneumatic cylinder 81, the cylinder piston 82 of which can be pressurized with compressed air on both sides ( Fig. 8 ).
  • a bidirectionally linearly movable piston rod 61 of the pneumatic cylinder 81 is connected to a crank 62 designed as an angle lever, forming a pivot point G61, wherein the crank 62 is rotatably mounted in a pivot point D62 arranged in a fixed position in the suction belt table 19.
  • the crank 62 designed as an angle lever has a short lever and a lever which is longer than this short lever, wherein the short lever connects the pivot point G61, at which the piston rod 61 of the pneumatic cylinder 81 is connected to the crank 62, to the pivot point D62 of the crank 62.
  • the crank 62 is in turn connected to a coupling 63, forming a pivot point G62.
  • the longer lever of the crank 62 extends between its pivot point D62 and the pivot point G62, at which the crank 62 is connected to the coupling 63.
  • the coupling 63 and the crank 62 driving the coupling 63 form a slider crank mechanism in their interaction, wherein an end point E2 of the coupling 63 facing away from the drive 59 of the catching device 58 is bidirectionally linearly movable along a path 64 arranged parallel to the conveying plane E19 of the suction belt table 19.
  • the end point E2 of the coupling 63 facing away from the drive 59 of the catching device 58 and the pivot point D62 of the crank 62 are therefore located on a straight line G64 connecting them, wherein this straight line G64 runs parallel to the conveying plane E19 of the suction belt table 19.
  • the coupling 63 has at least one stop surface 66 for sheets to be caught in an area between its end point E1 facing the drive 59 of the catching device 58 and the articulation point G62 at which the crank 62 is connected to the coupling 63.
  • the stop surface 66 in question is therefore preferably a component of the coupling 63.
  • the stop surface 66 in question is preferably made of a plastic, e.g. of a polyamide (abbreviation PA) or of a thermoplastic such as polyoxymethylene (abbreviation POM).
  • the slider crank mechanism has a centric slider crank, which means that the three Fig. 4 the sections G62-D62, G62-E2 and G62-E1 shown are each of the same length and the end points E1; E2 of the coupling 63 together with the articulation point G62 arranged between them all lie on a straight line G63 connecting the end points E1; E2 of the coupling 63.
  • the short lever and the longer lever of the crank 62 are designed in their length ratio to one another such that they translate a movement triggered by the drive 59 of the arresting device 58 and acting on the coupling 63 into a faster speed.
  • FIG. 2 and 5 show the catching device 58 in its inactive, ie unactuated starting position or parking position, in which the at least one stop surface 66 formed on the coupling 63 is arranged below the conveying plane E19 of the suction belt table 19.
  • the sheets can pass the suction belt table 19 in its conveying plane E19 unhindered, which in the Fig. 5 indicated by two consecutive directional arrows.
  • the piston rod 61 of the pneumatic cylinder 81 forming the drive 59 of the safety device 58 is extended by a corresponding application of compressed air to this pneumatic cylinder 81 and the end point E2 of the coupling 63 facing away from the drive 59 of the safety device 58 takes up its position on the track 64 furthest from the drive 59 of the safety device 58.
  • the Fig. 6 and 7 show the catching device 58 in its catching position.
  • the at least one stop surface 66 preferably formed on the coupling 63, penetrates through a corresponding, e.g. slot-shaped opening 67 ( Fig. 3 ) the conveying plane E19 of the suction belt table 19 and adjusts itself by a swiveling movement from a position previously set at a preferably acute angle to the Conveying plane E19 of the suction belt table 19 inclined position preferably perpendicular to this conveying plane E19 ( Fig.
  • the piston rod 61 of the pneumatic cylinder 81 forming the drive 59 of the catching device 58 is retracted by appropriately applying compressed air to this pneumatic cylinder 81 and the end point E2 of the coupling 63 facing away from the drive 59 of the catching device 58 assumes its position on the track 64 which is closest to the drive 59 of the catching device 58.
  • Fig. 7 shows an excerpt from the Fig. 2 with skid belts 48, which are shown in their operating state protruding obliquely upwards from the previous conveyor level E19 of the suction belt table 19 at an acute angle opening in the transport direction T of the sheets, as well as with a catch blower 51 activated, for example, by the control unit 71, the activation of which in the Fig. 7 is indicated by a blowing direction arrow directed towards the conveying plane E19 of the suction belt table 19.
  • the catching device 58 is returned to its Catch position is switched by the drive 59 of the catch device 58 being automatically, in particular program-controlled, operated by a control unit 71, usually by the further control unit 71, which preferably controls all functions of the suction belt table 19.
  • This control unit 71 also controls, for example, the valves of the blow box 37 ( Fig. 2 ).
  • the transport speed of the sheets can be reduced, for example, by transport devices arranged upstream of the catching device 58 in the transport direction T of the sheets reducing their respective transport speed. Even if the transport speed of a transport device arranged upstream of the catching device 58 in the transport direction T of the sheets is not immediately reduced when the catching device 58 is actuated, e.g.
  • the negative pressure set in the relevant suction chamber 41 by means of a suction device 72 controlled by the control unit 71 is switched off in any case, this suction chamber 41 being fluidically connected to the relevant switching area 52 by means of the suction bores 53 formed in the conveying plane E19 of the suction belt table 19 and at least partially overlapping with a floor plan of the stack of sheets to be caught that is to be formed. Then, the at least one stop surface 66 of the catching device 58 is inserted into a sheet gap between the rear edge of a previous sheet and a front edge of a first subsequent sheet to be caught.
  • control unit 71 actuates at least one pneumatic switching valve 86, preferably two pneumatic switching valves 86; 87 at the same time, so that the piston rod 61 of the pneumatic cylinder 81 forming the drive 59 of the catching device 58 is retracted.
  • this pneumatic cylinder 81 has a bottom chamber 68 and a bearing chamber 69 separated from the bottom chamber 68 by a cylinder piston 82 firmly connected to the piston rod 61, wherein a first pneumatic switching valve 86 is connected to the bottom chamber 68 and a second pneumatic Switching valve 87 is connected to the bearing chamber 69.
  • These two switching valves 86; 87 are each controlled by the control unit 71 of the catching device 58.
  • the bottom chamber 68 can have barometric pressure.
  • the bottom chamber 68 can have a differential pressure greater than the barometric pressure and less than the pressure in the bearing chamber 69.
  • the piston rod 61 of the pneumatic cylinder 81 forming the drive 59 of the catching device 58 is retracted by pressurizing the bearing chamber 69, e.g. with 7 bar.
  • the cylinder piston 82 of the pneumatic cylinder works against the pressure in the bottom chamber 68, e.g. B. compressed air pre-pressurized with 2 bar, which can escape in a throttled manner via the open pneumatic switching valve 86 of the bottom chamber 68 and, if necessary, via a connected throttle valve 91.
  • the proposed slider-crank mechanism it is possible to bring at least one stop surface 66 of the catching device 58 into the catching position even at a high sheet transport speed of several thousand sheets per hour, e.g. of around 10,000 sheets per hour, through a sheet gap measuring only around 20 mm.
  • the reaction time achievable with the proposed slider-crank mechanism thus significantly exceeds the switching times of simple folding and/or sliding mechanisms, which are operated by switching magnets or directly, ie without a gear, driven by a pneumatic cylinder 81.
  • a further advantage of the solution found is that the proposed slider crank mechanism is comparatively simple and space-saving.
  • a control unit 71 provided for the suction belt table 19 actuates the catching device 58 depending on a fault that has occurred in a processing station downstream of the suction belt table 19 such that the catching device 58 assumes its catching position.
  • the transport device 18 arranged upstream of the suction belt table 19, which transports the sheets lying down along a linear transport path, belongs to a dryer 17.
  • This dryer 17 is arranged downstream of a processing station designed as a non-impact printing device 13.
  • the suction belt table 19 is also preferably arranged upstream of a processing station designed as a coating device 22, in particular a painting device.
  • the Coating device 22 has, as a transport device for sheets to be transported, in particular a transport cylinder 23, with this transport cylinder 23 preferably interacting with a printing unit cylinder 24 with an application roller 26 which is or can at least be adjusted to this printing unit cylinder 24, with at least one doctor blade 27 or a chamber doctor blade system 27 extending in the axial direction of the application roller 26.
  • This machine arrangement is designed to transport the sheets at a transport speed of preferably several thousand sheets per hour, in particular of approximately 10,000 sheets per hour.
  • the transport device 18 arranged upstream of the suction belt table 19, which transports the sheets lying down along a linear transport path, is designed to transport the individual sheets which follow one another in a sequence, each with a sheet gap preferably measuring approximately 20 mm.
  • a suction belt table 19 for sheet-shaped substrates to be transported lying individually the suction belt table 19 being arranged between a transport device arranged upstream in the transport direction T of the substrates and a correspondingly downstream transport device, the suction belt table 19 having a catching device 58 with a catching position assumed as a result of its actuation for individual substrates following one another in a sequence, the catching device 58 in its catching position catching substrates fed to the suction belt table 19 from the upstream transport device on the suction belt table 19 before they are respectively transferred to the transport device arranged downstream of the suction belt table 19, i.e. preventing them from moving forward in the transport direction T and stacking them.
  • the transport device arranged upstream of the suction belt table 19 has a translatory transport path for the sheet-shaped substrates to be transported individually and/or the transport device arranged downstream of the suction belt table 19 has a rotary transport path or a translatory transport path for the sheet-shaped substrates to be transported. It is a in particular a digital control unit 71 is provided, this control unit 71 actuating the catching device 58 as a function of a disturbance that has occurred along the transport path belonging to the transport device downstream of the suction belt table 19, such that the catching device 58 assumes its catching position.
  • the catching device 58 has at least one pivotable stop surface 66 for substrates to be caught, the stop surface 66 in question being arranged below a conveying plane E19 of the suction belt table 19 when the catching device 58 is not actuated by the control unit 71, and when the catching device 58 is actuated by the control unit 71, it is pivoted through an opening 67 in the conveying plane E19 of the suction belt table 19 and positioned perpendicular to this conveying plane E19, so that substrates transported on the suction belt table 19 strike against the at least one positioned stop surface 66 protruding from the conveying plane E19 of the suction belt table 19.
  • the catching device 58 has a slider-crank mechanism, the slider-crank mechanism having a coupling 63 and a crank 62 that interacts with the coupling 63, the crank 62 being driven by a drive 59.
  • the crank 62 is rotatably mounted in a pivot point D62 that is fixed in place in the suction belt table 19, the crank 62 being designed as an angle lever and having a short lever and a lever that is longer than this short lever, the short lever connecting a pivot point G61, at which the drive 59 engages the crank 62, to the pivot point D62 of the crank 62, the longer lever of the crank 62 extending between its pivot point D62 and a pivot point G62, at which the crank 62 is connected to the coupling 63.
  • the short lever and the longer lever of the crank 62 are designed in their length ratio to one another in such a way that they translate a movement acting on the coupling 63 from the drive 59 of the catching device 58 into a faster one.
  • the transmission ratio i into a faster one is preferably at least 1:5.
  • An end point E2 of the coupling 63 facing away from the drive 59 of the catching device 58 is bidirectionally linearly movable along a track 64 arranged parallel to the conveying plane E19 of the suction belt table 19, wherein the movement of the drive 59 of the catching device 58 facing away end point E2 of the coupling 63 and the pivot point D62 of the crank 62 are arranged on a straight line G64 connecting these two points, this straight line G64 running parallel to the conveying plane E19 of the suction belt table 19.
  • the at least one stop surface 66 for substrates to be caught is formed in an area between an end point E1 of the coupling 63 facing the drive 59 of the catching device 58 and the articulation point G62 at which the crank 62 is connected to the coupling 63.
  • the slider crank mechanism preferably has a centric slider crank in which the three sections G62-D62; G62-E2; G62-E1 are each of the same length and the end points E1; E2 of the coupling 63 together with the articulation point G62 arranged between them are all arranged on a straight line G63 connecting the end points E1; E2 of the coupling 63.
  • the drive 59 of the catching device 58 is advantageously designed as a double-acting pneumatic cylinder 81, this pneumatic cylinder 81 having a bottom chamber 68 and a bearing chamber 69 separated from the bottom chamber 68 by a cylinder piston 82 firmly connected to its piston rod 61.
  • the bearing chamber 69 is arranged at that end of the pneumatic cylinder 81 which faces the articulation point G61 at which the drive 59 engages the crank 62.
  • the bottom chamber 68 is arranged at that end of the pneumatic cylinder 81 which faces away from the articulation point G61 at which the drive 59 engages the crank 62.
  • a first pneumatic switching valve 86 is connected to the bottom chamber 68 and a second pneumatic switching valve 87 is connected to the bearing chamber 69, these two switching valves 86; 87 are each controlled by the control unit 71 of the catching device 58.
  • the bottom chamber 68 has either barometric pressure or the bottom chamber 68 has a differential pressure greater than the barometric pressure and less than the pressure in the storage chamber 69.
  • the piston rod 61 of the pneumatic cylinder 81 is retracted by applying pressure to the storage chamber 69, e.g. with 7 bar.
  • the cylinder piston 82 of the pneumatic cylinder 81 works against compressed air in the bottom chamber 68, e.g. with 2 bar pre-pressurized, whereby this compressed air comes from a connected compressed air source 93.
  • a suction belt table 19 for the horizontal transport of individual sheet-shaped substrates in a conveying plane E19 wherein the suction belt table 19 has a catching device 58 and at least one skid belt 48, wherein the catching device 58 and the at least one skid belt 48 are each designed to assume one of two different operating states under the control of a control unit 71, wherein with respect to the catching device 58 and the at least one skid belt 48, the first operating state is an inactive operating state and the second operating state is an activated operating state, wherein the catching device 58 in its activated state has at least one stop surface 66 for substrates to be caught, which stop surface is set up perpendicular to the conveying plane E19 of the suction belt table 19, wherein the at least one skid belt 48 is positioned in the transport direction T of the substrates by at least one substrate length extending in the transport direction T of the substrates in front of the at least one perpendicular to the conveying plane E19 of the suction belt table 19 is
  • the suction belt table 19 is arranged between a transport device arranged upstream in the transport direction T of the substrates and a correspondingly downstream transport device, wherein the transport device arranged upstream of the suction belt table 19 has a translatory transport path for the sheet-shaped substrates to be transported individually lying down and/or the transport device arranged downstream of the suction belt table 19 has a rotary transport path or a translatory transport path for the sheet-shaped substrates to be transported.
  • a catch blower 51 with several blowing nozzles arranged in a row extending transversely to the transport direction T of the substrates is arranged, wherein the catch blower 51, in its activated state, blows blowing air from its blowing nozzles, e.g. vertically in the direction of the conveying plane E19 of the suction belt table 19.
  • the control unit 71 actuates the catching device 58 as a function of a fault that has occurred along the transport path belonging to the transport device downstream of the suction belt table 19 in such a way that the catching device 58 sets up its at least one stop surface 66 for substrates to be caught perpendicular to the conveying plane E19 of the suction belt table 19 and/or this control unit 71 actuates the at least one skid belt 48 as a function of the fault that has occurred along the transport path belonging to the transport device downstream of the suction belt table 19 in such a way that the at least one skid belt 48 is pivoted out of the conveying plane E19 of the suction belt table 19 at an acute angle obliquely upwards and/or this control unit 71 actuates the catching blower 51 as a function of the fault that has occurred along the transport path belonging to the transport device downstream of the suction belt table 19 in such a way that the catching blower 51 blows air from its Blow nozzles in the direction of the conveying plane E19 of
  • the suction belt table 19 is preferably designed in such a way that in the transport direction T of the substrates, after the catching device 58, above the conveying plane E19 of the suction belt table 19, a blow box 37 of a shingling device belonging to the suction belt table 19 is arranged.
  • a guide device 42 with several lifting nozzles 43 is arranged, extending transversely to the transport direction T of the substrates.
  • At least one suction chamber 41 is arranged below the conveying plane E19 of the suction belt table 19, the respective pressure of the suction chamber 41 being set or at least adjustable by the control unit 71, a negative pressure being set or at least adjustable by the control unit 71 through suction bores 53 formed in the conveying plane E19 of the suction belt table 19 to the relevant suction chamber 41 in the conveying plane E19 of the suction belt table 19.
  • the negative pressure set in the conveying plane E19 of the suction belt table 19 by means of the suction chamber 41 is switched off in the event of a fault occurring along the transport route belonging to the transport device downstream of the suction belt table 19.
  • the control unit 71 is preferably designed such that it reduces a transport speed of the substrates at least in the transport device arranged upstream of the catching device 58 in the transport direction T of the substrates.
  • two skid belts 48 arranged parallel to one another in the form of circulating endless belts are provided in the transport direction T of the sheets, wherein these two skid belts 48 are arranged symmetrically to the center line M of the conveying plane E19 of the suction belt table 19.
  • a pneumatic drive 59 controlled by the control unit 71 actuates the catching device 58.
  • a stopper when a stopper is in operation, due to the high transport speed of several thousand sheets transported in the conveying plane E19 of the suction belt table 19 per hour, e.g. of about 10,000 sheets per hour, and the relatively small gap of e.g. only about 20 mm between individual sheets that follow one another directly in their transport direction T, it is necessary to set up at least one stop surface 66 of the catching device 58 in the conveying plane E19 of the suction belt table 19 in a very short time and thus to insert it into the linear transport path of the sheets.
  • a pneumatic circuit be provided for the operation of the double-acting pneumatic cylinder 81 of the catching device 58, which pneumatic circuit controls the movement of the cylinder piston 82 in such a way that a positive acceleration is set for the cylinder piston 82 in a first half of its stroke and a negative acceleration is set in a second half of its stroke following the first half.
  • This pneumatic cylinder 81 has a base chamber 68 and a bearing chamber 69 separated from the base chamber 68 by the cylinder piston 82, the cylinder piston 82 being firmly connected to the piston rod 61.
  • the bearing chamber 69 is arranged at that end of the pneumatic cylinder 81 which faces the articulation point G61 at which the drive 59 engages the crank 62.
  • the bottom chamber 68 is arranged at the end of the pneumatic cylinder 81 which faces away from the articulation point G61, at which the drive 59 engages the crank 62.
  • the cylinder piston 82 preferably has an end position damping element 83; 84 on both sides.
  • the pneumatic circuit described in detail below implements a change in a dynamic pressure equilibrium in the two chambers 68; 69 of the pneumatic cylinder 81. controlled acceleration phase and a controlled braking phase over the entire stroke of the cylinder piston 82.
  • the pneumatic circuit has a first pneumatic switching valve 86 and a second pneumatic switching valve 87, wherein both switching valves 86; 87 are each preferably electrically operated by the control unit 71. Both switching valves 86; 87 are each connected to their respective compressed air source 93 in one of their switching positions.
  • Fig. 8 shows the operating position of the pneumatic cylinder 81 in which the piston rod 61 of the pneumatic cylinder 81 forming the drive 59 of the catching device 58 is retracted and the catching device 58 is thus activated, which means that the stop surface 66 of the catching device 58 is positioned in the conveying plane E19 of the suction belt table 19.
  • At least the switching valve 86 for the bottom chamber 68 is preferably preceded by a pressure reducer 88 in order to build up a defined initial counterpressure in the bottom chamber 68 when the compressed air flows out.
  • a pressure reducer 89 can also be preceded by the switching valve 87 for the storage chamber 69.
  • a throttle valve 91 is arranged downstream of the switching valve 86 of the base chamber 68 in order to use this throttle valve 91, the cross-section of which is preferably adjustable, to influence the outflow speed of the compressed air from the base chamber 68 and thus the dynamic pressure curve in the pneumatic cylinder 81 and thus the speed of the cylinder piston 82.
  • a throttle valve 92 is also arranged in the air outlet from the bearing chamber 69 of the pneumatic cylinder 81 in order to limit the speed of the cylinder piston 82.
  • the throttle valve 91 of the base chamber 68 and, if applicable, the throttle valve 92 of the bearing chamber 69 are only used when compressed air flows out of the respective chamber 68; 69 into the atmosphere.
  • the bearing chamber 69 of the pneumatic cylinder 81 is preferably depressurized, ie there is a pressure in it, e.g. equal to the barometric pressure.
  • the bearing chamber 69 of the pneumatic cylinder 81 is subjected to a pressure greater than the barometric pressure via the pressure reducer 89 that may be connected to it, e.g. with a pressure that corresponds to the pressure in the bottom chamber 68, i.e. preferably with a pressure of e.g. 2 bar. If the pressure set in both chambers 68; 69 is the same, the cylinder piston 82 is held in a stable end position.
  • the bottom chamber 68 which is pre-tensioned with compressed air, e.g. 2 bar, an air mass that can be controlled via the pressure is provided, which is required to brake the movement of the cylinder piston 82 that occurs when the catch device 58 is activated.
  • the activation of the catching device 58 with the shooting of its at least one stop surface 66 into a sheet gap between the rear edge of a previous sheet and the front edge of a first subsequent sheet to be caught takes place in that the two switching valves 86; 87 are actuated by the control unit 71, in particular simultaneously.
  • the storage chamber 69 is filled with compressed air from its compressed air source 93 with more than 5 bar, in particular with a pressure of e.g.
  • the braking effect sets in such a way that the movement of the cylinder piston 82 initially experiences a very large acceleration with resulting speed, before this movement of the cylinder piston 82 is largely braked at the end by the actively clamped air column and only a remaining residual speed of less than, for example, 10% of the previously achieved maximum possible speed is braked at the end position damping element 83 of the pneumatic cylinder 81.
  • the catch device 58 is activated, the cylinder piston 82 is accelerated over the first half of its stroke and braked over its second half. In the first half of its stroke, the cylinder piston 82 reaches its maximum possible speed.
  • the cylinder piston 82 arrives at its respective end position at zero speed. In real operation, however, this is not achieved. Therefore, the small amount of residual energy still present must be dissipated at the respective end position damping element 83; 84.
  • This very fast movement of the cylinder piston 82 is transmitted with a high gear ratio by the crank 62 to the coupling 63, which is preferably arranged in a central slider crank position.
  • the pneumatic circuit described and the pressure setting values given as examples make it possible to bring at least one stop surface 66 of the catching device 58 into a catching position even at the high transport speed of the sheets mentioned above through the very narrow sheet gap mentioned above.
  • the solution shown advantageously avoids high impact loads and load peaks in the entire kinematic system. This is because the clamped air column, which dampens the drive movement of the cylinder piston 82 at the end, particularly in the base chamber 68, effectively prevents the cylinder base from being destroyed.
  • a safe end position of the cylinder piston 82 in its retracted state is achieved without additional mechanical elements and therefore without additional costs.
  • the pressure reduction in the storage chamber 69 also saves energy and reduces any leakage.
  • Fig. 9 to 12 illustrate once again, by way of example, in a diagram over the time t plotted on the abscissa, the dynamic behavior of some physical variables with reference to the cylinder piston 82 of the pneumatic cylinder 81 during a switching process when the catching device 58 of the respective suction belt table 19 is moved from its starting position to its catching position, in particular actuated by a control signal from the control unit 71.
  • Fig. 9 shows a change in position of the cylinder piston 82 between its two end positions in the pneumatic cylinder 81. A travel z and thus the stroke of the cylinder piston 82 is here e.g. shown as 10 mm.
  • FIG. 10 shows, by way of example, the speed v of the cylinder piston 82 during its movement along the travel z.
  • Fig. 11 shows as an example the corresponding acceleration a with which the cylinder piston 82 executes its movement along the travel z.
  • Fig. 12 The piston force F exerted by the cylinder piston 82 is then shown as an example.
  • both switching valves 86; 87 are each preferably electrically operated by the control unit 71.
  • the catching device 58 has a slider crank mechanism driven by the cylinder piston 82 of the pneumatic cylinder 81 in accordance with the previous description. The movement of the cylinder piston 82 is controlled by the control unit 71 in such a way that a positive acceleration is set for the cylinder piston 82 in a first half of its stroke and a negative acceleration is set in a second half of its stroke following the first half.
  • a pressure reducer 88 is connected upstream of at least the first switching valve 86 connected to the bottom chamber 68.
  • At least the first switching valve 86 connected to the bottom chamber 68 is provided with, for example, a preferably adjustable opening cross-section Throttle valve 91 is arranged downstream.
  • the opening cross-section of the throttle valve 91 is set, for example by the control unit 71, in such a way that the movement of the cylinder piston 82 at the end of the second half of its stroke has a residual speed of less than 10% of the maximum speed previously reached in the first half of its stroke.
  • the cylinder piston 82 preferably has an end position damping element 83; 84 on both sides, wherein the residual speed of the cylinder piston 82 remaining at the end of the second half of its stroke is braked at the relevant end position damping element 83; 84.
  • the control unit 71 switches the first switching valve 86 connected to the bottom chamber 68 into a position that diverts the air mass from the bottom chamber 68 and at the same time the second switching valve 87 connected to the storage chamber 69, so that the storage chamber 69 is pressurized with compressed air at a pressure of more than 5 bar.
  • the suction belt table 19 has in its conveying plane E19 a switching area 52 with a plurality of suction holes 53 extending in the transport direction T of the sheets, wherein preferably a plurality of suction chambers 41 are arranged below the conveying plane E19 of the suction belt table 19, each of which can be controlled in terms of their respective fluidic effect.
  • These suction chambers 41 are preferably arranged one behind the other in the transport direction T of the sheets and in particular are switched or at least switchable individually and independently of one another in terms of their respective pressure.
  • the suction holes 53 in the switching area 52 form a fluidic connection to at least one of the preferably several suction chambers 41 each arranged below the conveying plane E19 of the suction belt table 19, wherein in this switching area 52 by the respective setting of the pressure in the respective suction chamber 41 by means of a suction device 72 controlled by the control unit 71 a negative pressure is set or at least adjustable at the suction holes 53 in the conveying plane E19 of the suction belt table 19.
  • This negative pressure has the effect that a sheet resting on the at least one feed belt 54 in the conveying plane E19 of the suction belt table 19 is held in a frictional or force-locking manner. This is because the switching area 52 at least partially overlaps with the outline of the sheet to be caught.
  • At least one pneumatic timing valve 74 controlled by a control unit 71 is arranged in a supply line 73 pneumatically connecting the suction chamber 41 in question to the respective suction bores 53, the timing valve 74 in question interrupting the pneumatic connection when the catching device 58 is moved into its catching position.
  • the timing valve 74 in question is designed such that, at the same time as the pneumatic connection between the suction chamber 41 in question and the respective suction bores 53 is interrupted, a section of the supply line 73 between the timing valve 74 in question and the respective suction bores 53 is ventilated with barometric pressure or with a pressure that is 3% to 10%, preferably 5%, higher than the barometric pressure.
  • the transport speed of the sheets corresponds to a cycle time in which immediately successive sheets reach the position of at least one stop surface 66 of the catching device 58 protruding from the conveying plane E19 of the suction belt table 19.
  • a switching time of the relevant timing valve 74 is shorter than the cycle time of immediately successive sheets and is preferably in a range between 20 ms and 100 ms, in particular 40 ms.
  • the switching time of the relevant timing valve 74 is the time starting from the time of its actuation until the time at which the relevant timing valve 74 has stably changed from its first operating position to its second operating position.
  • the control unit 71 is preferably designed in such a way that it sets the relevant timing valve 74 into the state which interrupts the pneumatic connection between the relevant suction chamber 41 and the respective suction bores 53 earlier by the duration of a cycle time before the catching device 58 is actuated.
  • the advantage of this solution is that when a stopper is in operation, the first sheet caught by the catching device 58 is not pushed together or crumpled. Rather, the arrangement of at least one timing valve 74 controlled by the control unit 71 in the feed line 73 between the relevant suction chamber 41 and the respective suction holes 53 ensures that the catching process is independent of the inevitable after-running of the at least one feed belt 54 and/or a sustained suction effect of the relevant suction chamber 41 after the stopper has been detected.
  • a plurality of sheets are fed to the suction belt table 19 from a transport device arranged immediately upstream of the suction belt table 19, wherein these sheets are transported one behind the other along a linear transport path, at least in this transport device and on the suction belt table 19, lying individually, each with a narrow gap between them.
  • these sheets are transported by means of a plurality of transport belts arranged one behind the other in the transport direction T of the sheets, starting from the revolving transport belt 18 of the transport device arranged immediately upstream of the suction belt table 19 via at least one transfer belt 44 belonging to the suction belt table 19, which is designed, for example, as a revolving flat belt preferably arranged in the middle region of the conveying plane E19 of the suction belt table 19, wherein in the transport direction T the sheets after the transfer belt 44, for example, have two jump belts 48 arranged parallel to one another.
  • B. are arranged in the form of circulating endless belts, followed by at least one feed belt 54, in particular designed as a suction belt, and e.g.
  • the deflection roller 76 arranged at the point of discontinuity 78 has, for example, several nozzle-shaped openings on its outer surface, with a compressed air jet emerging from each of these openings, with one of the compressed air jets being directed at least in the direction of the at least one lifting nozzle 43.
  • Fig. 14 shows an example in a top view of a section of the e.g. in connection with the Fig. 3 described suction belt table 19.
  • a sheet-shaped substrate preferably a printed sheet, called a sheet 77 for short, is transferred to the suction belt table 19 on a conveyor plane E19 as a result of its translatory movement on a rotating conveyor belt 18 belonging to a dryer 17, for example.
  • Transferred sheets 77 are e.g. B. by a transfer belt 44 belonging to the suction belt table 19, wherein this transfer belt 44 is designed e.g. as a revolving flat belt arranged in the middle area of the conveyor plane E19 of the suction belt table 19 and/or as a suction belt.
  • the transfer belt 44 is followed in the transport direction T of the sheets 77 e.g. by two parallel jump belts 48 e.g. in the form of revolving endless belts.
  • Fig. 15 shows schematically and in a highly simplified manner, by way of example, the guide device 42 arranged in a discontinuity point 78 relating to the mechanical support of the sheets 77 to be transported, with at least one lifting nozzle 43, preferably with several lifting nozzles 43, wherein this discontinuity point 78 is arranged, for example, between a circulating conveyor belt 16 belonging to a non-impact printing device 13 and a circulating conveyor belt 18 belonging to a dryer 17.
  • a sheet 77 transported in the transport direction T tends to be drawn with its front edge into a gap located at the discontinuity point 78 in the periphery of the deflection roller 76 and extending transversely to the transport direction T of the sheets 77 as a result of the rotation of the deflection roller 76, thereby causing an operational disruption.
  • Such a discontinuity point 78 in the mechanical support of the sheets 77 to be transported consists in a Fig. 1 digital printing machine shown as an example, which transports sheets 77 lying down, at several positions, at the respective transition to and after the non-impact printing device 13 and at the transition from the dryer 17 to the suction belt table 19.
  • Fig. 16 to 19 explain the functioning of the guide device 42 arranged in such a discontinuity point 78 with reference to a digital printing machine transporting sheets 77 lying down at the transition of the sheets 77 from the non-impact printing device 13 to a dryer 17 arranged immediately downstream of the non-impact printing device 13.
  • These explanations also apply mutatis mutandis to all other positions at which a generic guide device 42 is arranged or at least can be arranged in the relevant machine arrangement designed as a digital printing machine.
  • Fig. 16 shows the initial situation for the function of the guide device 42 arranged in the discontinuity point 78.
  • a sheet 77 resting on the circulating conveyor belt 16 belonging to the non-impact printing device 13 reaches with its Front edge of the discontinuity point 78 at the transition of the sheets 77, e.g. from the conveyor belt 16 of the non-impact printing device 13 to a conveyor belt 18 of a dryer 17 arranged immediately downstream of the non-impact printing device 13.
  • the guide device 42 has a tapered profile element 79 extending transversely to the transport direction T of the sheets 77, preferably in the form of a doctor blade, the tip of this profile element 79 preferably being arranged approximately tangentially opposite to the transport direction T of the sheets 77 to the conveyor belt 16 of the non-impact printing device 13, the tip of this profile element 79 being spaced apart from the conveyor belt 16 of the non-impact printing device 13 deflected at the rotating deflection roller 76 by a gap, this gap having a larger width in relation to the thickness of the sheets 77 in the range between 1 mm and 5 mm.
  • At least one lifting nozzle 43 is arranged in the profile element 79, which opens in the direction of its tip, through which lifting nozzle 43, when the guide device 42, ie at least one of its lifting nozzles 43, is activated by the control unit 71, a Fig. 17
  • An air jet indicated by a direction arrow is directed against the conveyor belt 16 of the non-impact printing device 13 deflected at the deflection roller 76.
  • the sheet 77 resting on the conveyor belt 16 of the non-impact printing device 13 has rotated due to the rotation of the deflection roller 76 in comparison to the Fig. 16 shown initial situation, the gap formed to the guide device 42 is increasingly approached, with the front edge of the sheet 77 in question continuing to follow the curvature of the deflection roller 76 in a manner that potentially provokes a malfunction.
  • the air jet blown out of the at least one lifting nozzle 43 arranged in the profile element 79 when the guide device 42 is activated flows against the conveyor belt 16 of the non-impact printing device 13 deflected at the deflection roller 76.
  • This air jet hits the conveyor belt 16 in such a way that the direction of the core jet of this air jet is the circular circumferential line of the deflection roller 76 as a secant.
  • this air jet is directed towards the conveyor belt 16 in such a way that a free upper limit of this air jet facing the front edge of the relevant sheet 77 neither intersects nor exceeds a tangent between the circumferential line of the deflection roller 76 and the relevant lifting nozzle 43 of the guide device 42.
  • the air jet directed against the convex surface of the conveyor belt 16 of the non-impact printing device 13 deflected at the deflection roller 76 is directed there by the curvature of the deflection roller 76 in the direction of the approaching front edge of the relevant sheet 77.
  • This air jet which follows the curvature of the deflection roller 76 due to the Coanda effect and is converted into a wall flow, finally detaches the front edge of the relevant sheet 77 from the conveyor belt 16 of the non-impact printing device 13 ( Fig. 18 ) and, as the deflection roller 76 continues to rotate, the leading edge of the respective sheet 77 is increasingly lifted away from the conveyor belt 16 of the non-impact printing device 13 due to the resulting dynamic pressure ( Fig. 19 ), so that the front edge of the sheet 77, which is still mostly resting on the conveyor belt 16 of the non-impact printing device 13, is lifted onto the profile element 79 and thus onto the guide device 42 during its further transport.
  • the transport device of the non-impact printing device 13 mentioned here which is arranged immediately upstream of the discontinuity point 78 in the transport direction T of the sheets 77, has several, e.g. at least two, conveyor belts 16 arranged parallel to one another in the transport direction T of the sheets 77, it can be provided that at least one blow nozzle ejecting compressed air in the direction of the sheet 77 resting on these conveyor belts 16 is arranged between adjacently arranged conveyor belts 16.
  • the at least one conveyor belt 16 of the transport device arranged immediately upstream of the discontinuity point 78 in the transport direction T of the sheets 77 has raised longitudinal webs, wherein a groove is formed between each adjacent belt web, wherein the tip of the profile element 79 of the guide device 42 is arranged in a comb-like manner protruding into the grooves of the conveyor belt 16 having belt webs.
  • the guide device 42 is preferably deactivated by the control unit 71 by switching off the air jet flowing out of the at least one lifting nozzle 43.
  • the air jet flowing out of the at least one lifting nozzle 43 is thus preferably active in a clocked manner, this clock being synchronized with the arrival of the front edge of the relevant sheet 77 at the deflection roller 76 of the conveyor belt 16 deflected by this deflection roller 76.
  • An air jet flowing out of the at least one lifting nozzle 43 of the guide device 42 is therefore preferably only maintained until the front edge of the relevant sheet 77 has passed the gap at the point of discontinuity 78 located in the periphery of the deflection roller 76 and extending transversely to the transport direction T of the sheets 77 and the front edge of the relevant sheet 77 has been lifted onto the profile element 79 of the guide device 42.
  • a guide device 42 extending transversely to the transport direction T of the sheets 77 with a tapered profile element 79 is arranged at this point of discontinuity 78, wherein the tip of this profile element 79 is directed against the transport direction T of the sheets 77 towards the conveyor belt 16 of the first transport device, wherein at least one lifting nozzle 43 is constructed in the profile element 79, wherein the lifting nozzle 43 in question is designed to open in the direction of the tip of this profile element 79.
  • the tip of the profile element 79 is spaced apart from the conveyor belt 16 of the first conveyor device, which is deflected at the rotating deflection roller 76, by a gap, this gap having a larger width in relation to the thickness of the sheets 77 in the range between 1 mm and 5 mm.
  • the air jet in question is also particularly aligned in such a way that a free upper limit of this air jet facing a front edge of a sheet 77 transported on the conveyor belt 16 of the first transport device neither intersects nor exceeds a tangent between the circumferential line of the deflection roller 76 and the relevant lifting nozzle 43 of the guide device 42.
  • the guide device 42 is activated by the control unit 71.
  • the control unit 71 activates the guide device 42, for example in a clocked manner, with this clock is synchronized with the arrival of the front edge of the respective sheet 77 at the deflection roller 76 of the conveyor belt 16 of the first conveyor device deflected by this deflection roller 76.
  • the guide device 42 is therefore preferably designed to maintain the air jet flowing out of the respective lifting nozzle 43 only until the front edge of the respective sheet 77 has passed the gap at the point of discontinuity 78 located in the periphery of the deflection roller 76 and extending transversely to the transport direction T of the sheets 77 and the front edge of the respective sheet 77 has been lifted onto the tip of the profile element 79 of the guide device 42 by the air jet flowing out of the respective lifting nozzle 43.
  • the deflection roller 76 deflecting the at least one conveyor belt 16 of the first transport device and the guide device 42 together with its profile element 79 are each arranged below the conveying plane E19 of the sheets 77 to be transported and preferably flush with this conveying plane E19 at the top.
  • the blowing direction of the nozzles 49 arranged in this area is either orthogonal to the edge 94 laterally delimiting the conveying plane E19 of the suction belt table 19 or inclined by 45° in the transport direction T of the arc to the edge 94 laterally delimiting the conveying plane E19 of the suction belt table 19. It can also advantageously be provided that the blowing direction of a first subset of the nozzles 49 is e.g. orthogonal to the edge 94 laterally delimiting the conveying plane E19 of the suction belt table 19 and the blowing direction of a second subset of the nozzles 49 is e.g. inclined by 45° in the transport direction T of the arc to the edge 94 laterally delimiting the conveying plane E19 of the suction belt table 19.
  • nozzles 49 are arranged ( Fig. 3 and 20 ). These nozzles 49 are designed in particular as Venturi nozzles and are connected to a compressed air source 93 by means of a pneumatically connecting supply line 96.
  • a control valve 97 for setting and/or regulating the pressure of an air stream flowing out of the respective nozzle 49 is arranged in the supply line 96 connecting at least one of the nozzles 49 to the compressed air source 93.
  • a width of the area having the arrangement of nozzles 49 extending transversely to the transport direction T of the sheets is designed to be significantly larger than the width of the suction belt in question extending transversely to the transport direction T of the sheets, so that the width of the area having the arrangement of nozzles 49 lying outside the width of the suction belt in question is in a much more favorable ratio to the width of the highly curved front edge of the suction belt in question. sheet. Consequently, an effective area formed by the arrangement of the nozzles 49 and acting on the highly curved front edge of the sheet in question is significantly larger than the effective area acting on the highly curved front edge of the sheet in question by the suction belt in question.
  • control unit 71 is thus designed in such a way that it first supplies the nozzles 49 with compressed air and only then, i.e. after a time delay, does a suction force exerted on the sheet by at least one transfer belt 44 designed as a suction belt begin to act.

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Claims (15)

  1. Machine d'impression avec un dispositif d'impression sans impact (13), dans laquelle cette machine d'impression présente plusieurs stations de traitement traitant respectivement des feuilles (77), dans laquelle ces stations de traitement sont disposées les unes derrière les autres dans la direction de transport (T) des feuilles (77), dans laquelle une de ces stations de traitement présente le dispositif d'impression sans impact (13), dans laquelle la station de traitement concernée présentant le dispositif d'impression sans impact (13) ou une autre des stations de traitement présente un premier dispositif de transport transportant les feuilles (77) le long d'un trajet de transport linéaire avec au moins une bande de transport (16) à circulation sans fin renvoyée sur un rouleau de renvoi (76) rotatif, dans laquelle ce premier dispositif de transport est réalisé de manière à transporter des feuilles (77) individuelles voisines, se succédant directement dans une séquence respectivement couchées sur leur au moins une bande de transport (16), dans laquelle un deuxième dispositif de transport transportant les feuilles (77) également couchées sur au moins une bande de transport (18) à circulation sans fin le long d'un trajet de transport linéaire est situé en aval de cette station de traitement présentant le premier dispositif de transport, dans laquelle à l'emplacement d'un transfert des feuilles (77) à transporter à partir de la bande de transport (16) concernée du premier dispositif de transport vers la bande de transport (18) concernée du deuxième dispositif de transport suivant dans la direction de transport (T) des feuilles (77) dans un plan de convoyage (E19) de ces feuilles (77) à transporter est réalisé un point de discontinuité (78) dans le support mécanique de ces feuilles (77) respectivement à transférer, dans laquelle le rouleau de renvoi (76) renvoyant la au moins une bande de transport (16) du premier dispositif de transport est disposé sur le point de discontinuité (78) dans le support mécanique des feuilles (77) à transférer, dans laquelle un dispositif de guidage (42) s'étendant transversalement par rapport à la direction de transport (T) des feuilles (77) avec un élément profilé (79) se terminant en pointe est disposé sur ce point de discontinuité (78), dans laquelle le dispositif de guidage (42) est disposé dans le point de discontinuité (78) entre les deux bandes de transport (16 ; 18) disposées l'une derrière l'autre dans la direction de transport (T) des feuilles (77), dans laquelle la pointe de l'élément profilé (79) est dirigée à l'encontre de la direction de transport (T) des feuilles (77) vers la bande de transport (16) concernée du premier dispositif de transport, dans laquelle la pointe de l'élément profilé (79) est espacée de la bande de transport (16) concernée du premier dispositif de transport renvoyée sur le rouleau de renvoi (76) rotatif par une fente, dans laquelle la fente entre la pointe de l'élément profilé (79) et la bande de transport (16) concernée du premier dispositif de transport renvoyée sur le rouleau de renvoi (76) rotatif présente une largeur dans la plage comprise entre 1 mm et 5 mm, dans laquelle une unité de commande (71) et au moins une buse de levage (43) sont prévues, dans laquelle la au moins une buse de levage (43) est activée ou au moins peut être activée par l'unité de commande (71), dans laquelle la station de traitement située directement en aval de la station de traitement avec le premier dispositif de transport est réalisée sous la forme d'une table à bande aspirante (19), caractérisée en ce que la au moins une buse de levage (43) est disposée dans l'élément profilé (79) du dispositif de guidage (42), dans laquelle la buse de levage (43) concernée est réalisée de manière à déboucher en direction de la pointe de cet élément profilé (79), dans laquelle la table à bande aspirante (19) présente un dispositif de saisie (58) avec une position de saisie occupée à la suite d'un actionnement pour les feuilles (77) individuelles se succédant de manière voisine, dans laquelle le dispositif de saisie (58) dans sa position de saisie saisit les feuilles (77) amenées par le premier dispositif de transport (18) situé en amont de la table à bande aspirante (19) à la table à bande aspirante (19) avant un transfert respectif sur un dispositif de transport situé en aval de la table à bande aspirante (19) sur la table à bande aspirante (19) et les empile.
  2. Machine d'impression selon la revendication 1, caractérisée en ce que le rouleau de renvoi (76) renvoyant la au moins une bande de transport (16) du premier dispositif de transport et le dispositif de guidage (42) sont disposés respectivement au-dessous du plan de convoyage (E19) des feuilles (77) à transporter et de manière à se terminer en affleurement vers le haut avec ce plan de convoyage (E19).
  3. Machine d'impression selon la revendication 1 ou 2, caractérisée en ce que dans l'élément profilé (79) plusieurs buses de levage (43) sont disposées dans une rangée s'étendant transversalement par rapport à la direction de transport (T) des feuilles (77).
  4. Machine d'impression selon la revendication 1 ou 2 ou 3, caractérisée en ce que lors d'une activation du dispositif de guidage (42) un jet d'air s'échappant de l'embouchure de la buse de levage (43) respective est dirigé contre la bande de transport (16) concernée du premier dispositif de transport renvoyée sur le rouleau de renvoi (76).
  5. Machine d'impression selon la revendication 4, caractérisée en ce que le jet d'air dirigé contre la bande de transport (16) concernée du premier dispositif de transport est dirigé sur la bande de transport (16) concernée, de telle sorte qu'aucun jet central de ce jet d'air ne coupe la ligne circonférentielle du rouleau de renvoi (76) sous la forme d'une sécante.
  6. Machine d'impression selon la revendication 4 ou 5, caractérisée en ce que le jet d'air s'échappant de l'embouchure de la buse de levage (43) respective est dirigé sur la bande de transport (16) concernée, de telle sorte qu'une limite supérieure libre de ce jet d'air tournée vers une arête avant d'une feuille (77) transportée sur la bande de transport (16) concernée du premier dispositif de transport ne coupe ni dépasse une tangente entre la ligne circonférentielle du rouleau de renvoi (76) et la buse de levage (43) concernée du dispositif de guidage (42).
  7. Machine d'impression selon la revendication 1 ou 2 ou 3 ou 4 ou 5 ou 6, caractérisée en ce que le dispositif de guidage (42) est activé de manière cadencée par l'unité de commande (71), dans laquelle cette cadence est synchronisée avec l'arrivée de l'arête avant de la feuille (77) respective sur le rouleau de renvoi (76) de la bande de transport (16) concernée du premier dispositif de transport renvoyée au moyen de ce rouleau de renvoi (76).
  8. Machine d'impression selon la revendication 1 ou 2 ou 3 ou 4 ou 5 ou 6 ou 7, caractérisée en ce que la au moins une buse de levage (43) du dispositif de guidage (42) est commandée par l'unité de commande (71), de telle sorte que le dispositif de guidage (42) maintient le jet d'air s'échappant de la buse de levage (43) concernée jusqu'à ce que l'arête avant de la feuille (77) respective soit passée par la fente se trouvant dans la périphérie du rouleau de renvoi (76), s'étendant transversalement par rapport à la direction de transport (T) des feuilles (77) sur le point de discontinuité (78) et que l'arête avant de la feuille (77) respective ait été soulevée par le jet d'air s'échappant de la buse de levage (43) concernée sur la pointe de l'élément profilé (79) du dispositif de guidage (42).
  9. Machine d'impression selon la revendication 1 ou 2 ou 3 ou 4 ou 5 ou 6 ou 7 ou 8, caractérisée en ce que l'unité de commande (71) commandant le dispositif de guidage (42) actionne le dispositif de saisie (58) en fonction d'une défaillance apparue dans une station de traitement située en aval de la table à bande aspirante (19), de telle sorte que le dispositif de saisie (58) occupe sa position de saisie.
  10. Machine d'impression selon la revendication 9, caractérisée en ce que l'unité de commande (71) commandant le dispositif de guidage (42) est réalisée de telle sorte que dans le cas d'une défaillance apparue dans une station de traitement située en aval de la table à bande aspirante (19), elle diminue une vitesse de transport des feuilles (77) au moins dans le dispositif de transport situé en amont du dispositif de saisie (58) dans la direction de transport (T) des feuilles (77).
  11. Machine d'impression selon la revendication 1 ou 2 ou 3 ou 4 ou 5 ou 6 ou 7 ou 8 ou 9 ou 10, caractérisée en ce que la table à bande aspirante (19) présente au moins une bande de prise en charge (44) à circulation sans fin réalisée sous la forme d'une bande aspirante pour la prise en charge des feuilles (77) transportées couchées individuellement dans le plan de convoyage (E19) à partir de la bande de transport (18) située en amont de la table à bande aspirante (19) dans la direction de transport (T) des feuilles (77), dans laquelle la table à bande aspirante (19) présente dans son plan de convoyage (E19) au moins dans une zone entre la au moins une bande de prise en charge (44) s'étendant longitudinalement par rapport à la direction de transport (T) des feuilles (77) et un bord (94) délimitant latéralement le plan de convoyage (E19) de la table à bande aspirante (19) un ensemble de plusieurs buses (49), dans laquelle les buses (49) disposées dans la zone entre la au moins une bande de prise en charge (44) s'étendant longitudinalement par rapport à la direction de transport (T) des feuilles (77) et un bord (94) délimitant latéralement le plan de convoyage (E19) de la table à bande aspirante (19) sont réalisées respectivement sous la forme de venturis.
  12. Machine d'impression selon la revendication 11, caractérisée en ce que l'ensemble des venturis dans la direction de transport (T) des feuilles (77) commence à une distance inférieure à 200 mm derrière la au moins une buse de levage (43) .
  13. Machine d'impression selon la revendication 11 ou 12, caractérisée en ce que le rouleau de renvoi (76) disposé sur le point de discontinuité (78) présente sur sa surface d'enveloppe au moins une ouverture en forme de buse, dans laquelle respectivement un jet d'air comprimé sort de l'ouverture concernée, dans laquelle l'un des jets d'airs comprimé est dirigé au moins en direction de la au moins une buse de levage (43) .
  14. Machine d'impression selon la revendication 1 ou 2 ou 3 ou 4 ou 5 ou 6 ou 7 ou 8 ou 9 ou 10 ou 11 ou 12 ou 13, caractérisée en ce que le premier dispositif de transport présente plusieurs bandes de transport (16) disposées parallèlement les unes aux autres dans la direction de transport (T) des feuilles (77), dans laquelle au moins une buse de soufflage expulsant de l'air comprimé en direction d'une feuille (77) reposant sur ces bandes de transport (16) est disposée entre des bandes de transport (16) disposées de manière voisine.
  15. Machine d'impression selon la revendication 1 ou 2 ou 3 ou 5 ou 6 ou 7 ou 8 ou 9 ou 10 ou 11 ou 12 ou 13 ou 14, caractérisée en ce que la au moins une bande de transport (16) du dispositif de transport situé directement en amont du point de discontinuité (78) dans la direction de transport (T) des feuilles (77) présente des nervures longitudinales saillantes, dans laquelle respectivement une rainure est réalisée entre des nervures longitudinales voisines, dans laquelle la pointe de l'élément profilé (79) du dispositif de guidage (42) est disposée de manière à faire saillie à la façon d'un peigne dans les rainures de la bande de transport (16) présentant les nervures longitudinales.
EP22737433.7A 2021-07-16 2022-06-21 Machine d'impression comportant plusieurs stations de traitement des feuilles Active EP4320060B1 (fr)

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DE102021118468.1A DE102021118468B3 (de) 2021-07-16 2021-07-16 Maschinenanordnung mit mehreren jeweils Bogen bearbeitenden Bearbeitungsstationen
PCT/EP2022/066842 WO2023285080A1 (fr) 2021-07-16 2022-06-21 Machine d'impression comportant plusieurs stations de traitement, chacune traitant des feuilles

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DE102023103065B3 (de) 2023-02-08 2023-12-21 Koenig & Bauer Ag Maschinenanordnung zum Fördern bogenförmiger Substrate, aufweisend einen ersten Bandförderer und einen zweiten Bandförderer, und eine Druckmaschine mit dieser Maschinenanordnung

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CN117320985A (zh) 2023-12-29
EP4320060A1 (fr) 2024-02-14
DE102021118468B3 (de) 2022-08-18
US12116226B2 (en) 2024-10-15
US20240246786A1 (en) 2024-07-25
WO2023285080A1 (fr) 2023-01-19

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