EP4209349B1 - Machine de traitement de feuilles, utilisation de la machine de traitement de feuilles, procédé de transport de feuilles et utilisation d'éléments conducteurs de feuilles contenant des dispositifs de désionisation - Google Patents

Machine de traitement de feuilles, utilisation de la machine de traitement de feuilles, procédé de transport de feuilles et utilisation d'éléments conducteurs de feuilles contenant des dispositifs de désionisation

Info

Publication number
EP4209349B1
EP4209349B1 EP23159098.5A EP23159098A EP4209349B1 EP 4209349 B1 EP4209349 B1 EP 4209349B1 EP 23159098 A EP23159098 A EP 23159098A EP 4209349 B1 EP4209349 B1 EP 4209349B1
Authority
EP
European Patent Office
Prior art keywords
sheet
sheets
sheet guide
processing machine
cylinder
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
EP23159098.5A
Other languages
German (de)
English (en)
Other versions
EP4209349A1 (fr
Inventor
Heinz Michael Koch
Mario Herzog
Tilo Hanke
Dietmar Lange
Michael GEIHSLER
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP4209349A1 publication Critical patent/EP4209349A1/fr
Application granted granted Critical
Publication of EP4209349B1 publication Critical patent/EP4209349B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0804—Machines for printing sheets
    • B41F15/0809—Machines for printing sheets with cylindrical or belt-like screens
    • 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
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/106—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/04—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs
    • B41F7/06—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs for printing on sheets
    • 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
    • B41J11/0015—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 for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • 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
    • B41J13/22—Clamps or grippers
    • 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
    • B41J13/22—Clamps or grippers
    • B41J13/223—Clamps or grippers on rotatable drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H15/00—Overturning articles
    • 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
    • B65H29/20—Delivering or advancing articles from machines; Advancing articles to or into piles by contact with rotating friction members, e.g. rollers, brushes, or cylinders
    • 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
    • B65H29/52—Stationary guides or smoothers
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • 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
    • B41J3/60—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/513—Modifying electric properties
    • B65H2301/5133—Removing electrostatic charge
    • 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
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/11—Dimensional aspect of article or web
    • B65H2701/113—Size
    • B65H2701/1131—Size of sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • 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
    • 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 sheet-processing machine, a use of the sheet-processing machine, a method for conveying sheets in a sheet-processing machine and the use of a sheet-guiding element containing a deionization device in a sheet-processing machine.
  • a sheet guiding device with an electrically insulated, comb-shaped edge is known, with a discharge device for discharging the printing substrate sheets located near the edge.
  • the edge, made of non-conductive material, is subject to increased wear, especially in the critical area of the sheet transfer zone, and causes stability weaknesses in the event of a crash.
  • the arrangement of the discharge device in the concentric guide path makes it difficult to maintain the optimal electrode spacing, which leads to reduced effectiveness.
  • a device for electrostatically influencing signatures in which a flat charging electrode is applied to the guide surface of a sheet guide plate.
  • the device is designed to attract the sheets to the sheet guide plate and keep them suspended by a blowing air flow.
  • a stable suspension height of the sheets is achieved by It's impossible to maintain such a device at a constant level.
  • the flat support electrode disrupts the nozzle distribution, which must be designed according to the arc support requirements.
  • a device for turning a sheet during conveyance through a printing press wherein a braking arrangement for the sheet is arranged fixedly to the frame.
  • the braking arrangement consists of a generator for an alternating magnetic field and a pneumatic guide device for the sheet.
  • a current is induced in the ferromagnetic material of the sheet or the printing ink on the sheet.
  • a magnetic field emanating from the eddy current is intended to counteract the field of the generator, thus braking the sheet.
  • the effectiveness of this principle is questionable.
  • the sheets are also not discharged, since no ions are emitted by the generator.
  • the DE 100 56 018 A1 shows a device for supporting sheet guiding and sheet depositing, wherein a sheet guiding element blowing air encloses a deionizing device inside.
  • the DE 10 2008 001 165 A1 shows a sheet-guiding cylinder of a processing machine, wherein the cylinder contains a base body on which a cylinder jacket electrically insulated from the base body is arranged.
  • the invention is based on the object of creating an alternative sheet-processing machine or an alternative method for conveying sheets in a sheet-processing machine, or of improving sheet guidance in general in a sheet-processing machine, in particular a turning device of a sheet-processing machine.
  • reliable sheet guidance is to be improved, especially in the area of a turning device, especially with low grammage or film sheets.
  • deionization of a sheet can be achieved after the sheet has been detached from a sheet guide cylinder, in particular a storage drum, in a turning device.
  • the machine can be suitable or equipped for processing low-grammage sheets and/or for processing foil sheets.
  • the machine can process, in particular print and/or varnish, sheet material with a grammage of over 250 g/m 2 , but preferably of under 250 g/m 2 , particularly preferably of under 150 g/m 2 , and most particularly preferably of under 80 g/m 2 .
  • a device in particular a tensioning suction device on the storage drum, can be provided which additionally stretches or tauts the sheet near the cylinder tangent between the storage drum and the turning drum, so that not only the optimal electrode spacing is maintained over the entire length of the sheet, but the influence can be exerted on the sheet where it remains free on the top and bottom sides from ion-binding contact with mass-bearing machine parts, so that the ions can flow into the activated deionizing ambient air, which ultimately leads to the maximum possible discharge of the arc.
  • a discharge cassette is installed in the sheet guide element, in particular a sheet guide plate under the perfecting unit for discharging the sheets. This frees a discharged sheet from electrostatic forces and allows it to be flattened, allowing it to pass through the subsequent processing station or printing zone without waves or wrinkles.
  • deionization devices in addition to the deionization device in the perfecting unit, in other or preferably all printing units and, if necessary, in other units and/or a delivery, since the substrate is always recharged in a printing zone.
  • sheet guide elements designed as sheet guide plates containing deionization devices are used for this purpose. These, at a suitable distance from the sheet conveyor path, ensure optimal unloading and guidance of the substrates.
  • the Fig. 1 shows, for example, a section of a sheet-processing machine 1, in particular a sheet-fed printing machine, here specifically a
  • the machine 1 can contain a feeder for sheet feeding or an output device for outputting the processed sheets.
  • the machine 1 could also have inline processing devices and/or one or more inline processing units, which can be designed, for example, as a foil finishing unit, cold foil unit, calender unit, die-cutting unit, numbering unit, screen printing unit, perforating unit, embossing unit, etc.
  • a turning device 3 is arranged, with which the sheets are turned in a front-and-back printing mode.
  • the machine 1 is preferably designed so that it can be switched between the front-and-back printing and front-and-back printing modes.
  • the press 1 contains, in particular, at least two or a plurality of printing units 2 and/or one or more coating units for processing sheets.
  • the printing units 2 of the press 1 each contain a transfer cylinder or blanket cylinder 6 and a forme cylinder or plate cylinder (not shown in detail).
  • a blanket cylinder 6 of a printing unit 2 interacts with a respective sheet-guiding cylinder, in particular an impression cylinder 5.
  • a sheet-conveying system preferably a sheet-conveying drum 7 or a transfer drum or a transfer cylinder, is provided between two sheet-guiding cylinders, in particular impression cylinders 5.
  • the impression cylinders 5 and the sheet-conveying drum 7 are double-sized here, and the blanket cylinders 6 and the plate cylinders are single-sized.
  • Single-sized cylinders can accommodate approximately one sheet of maximum format, and double-sized cylinders can accommodate approximately two sheets of maximum format simultaneously.
  • the sheet-guiding cylinders in particular impression cylinder 5, or transfer drums, could also be single-sized, triple-sized, or larger.
  • the double-sized printing cylinders 5 and the sheet conveyor drum 7 preferably each have two gripper systems for securing sheets to be conveyed, in particular foil sheets. These gripper systems, arranged diametrically opposite one another, for example in gripper channels, hold the sheet to be processed for conveyance.
  • the gripper systems preferably have fixed gripper stops that interact with gripper fingers that can be moved, for example, by means of control cams and cam rollers via roller levers to clamp the sheets.
  • the gripper stops of the printing cylinder 5 and the sheet conveyor drum 7 describe a gripper stop path during their respective rotations that largely corresponds to the sheet conveyor path.
  • the sheets can rest on the respective cylinder or the cylinder surface of a sheet guide cylinder, in particular printing cylinder 5.
  • the sheets are transferred between the sheet guide cylinders, in particular printing cylinders 5, and the sheet conveyor systems, in particular sheet conveyor drums 7, of the printing units 2 of the machine 1, preferably at gripper closure.
  • the last unit of machine 1 is preferably followed by a delivery unit 4 with a delivery chain circuit, which, by means of gripper carriages, receives the sheets from the last sheet-guiding cylinder, in particular a printing cylinder 5, and conveys them to a delivery stack.
  • a last unit of machine 1 upstream of delivery unit 4 can be designed as a printing, coating, drying, inspection, or finishing unit, such as an inline processing unit.
  • the blanket cylinders 6 are operatively connected to the plate cylinders and known inking or inking and dampening units are arranged, which apply the corresponding printing ink to a printing plate stretched on the respective plate cylinder.
  • a plate cylinder is inked by at least one, but preferably several, rollers of the associated inking or inking and dampening unit during its rotation.
  • the printing ink is applied in accordance with the motif to the printing plate covered with a rubber blanket. covered blanket cylinder 6.
  • a printing nip or printing zone is formed between a blanket cylinder 6 and an impression cylinder 5, through which the sheet to be printed is conveyed by the impression cylinder 5 by means of the gripper systems.
  • deionization devices 8 are therefore provided at least in the printing units 2 and/or coating units of the machine 1, which are arranged downstream of the printing nip of the first printing unit 2 of the machine 1 with respect to the sheet conveying direction BFR. Deionization devices 8 are preferably provided in all units of the machine 1 arranged downstream of the first printing unit 2. However, a deionization device 8 can also be assigned to a feed unit and/or the first printing unit 2 of the machine 1 in a further development.
  • the sheets, in particular foil sheets, are conveyed or transported along a sheet conveying path by the sheet guiding cylinders, in particular impression cylinders 5, and the sheet conveying systems, in particular sheet conveying drums 7, of the machine 1.
  • a sheet guiding element beginning in the area of the sheet guiding cylinder, in particular the impression cylinder 5.
  • Such a sheet guiding element is preferably designed as a metallic sheet guiding plate 9, which extends in particular across the width of the machine.
  • such a sheet guiding plate 9 has comb fingers 10 in the area facing the sheet guiding cylinder, in particular the impression cylinder 5.
  • the deionization device 8 is assigned to the sheet guiding element or the sheet guiding surface of the sheet guiding element in the region of the upstream sheet guiding cylinder, in particular the printing cylinder 5.
  • the deionization device 8 forms the sheet guiding surface in its arrangement region.
  • the section or a second region of the sheet guiding element, in particular sheet guiding plate 9, arranged downstream with respect to the sheet conveying direction BFR, is designed concentrically to the axis of rotation of the sheet conveying system, in particular the sheet conveying drum 7.
  • the sheet guiding surface of the second section of the sheet guiding element, in particular sheet guiding plate 9, is designed concentrically around the axis of rotation or the gripper impact path of the sheet conveying drum 7.
  • the first section of the sheet guiding element, in particular sheet guiding plate 9, can have a sheet guiding surface in or from the area of the sheet guiding cylinder, in particular impression cylinder 5, that continuously approaches the axis of rotation of the sheet conveying system, in particular sheet conveying drum 7.
  • the sheet guiding element is thus designed spirally.
  • the first section can also be designed concentrically around an axis spaced from the axis of rotation of the sheet conveying drum 7.
  • At least one fan 14 can be assigned to a sheet guiding element, in particular a sheet guiding plate 9, which fan can be controlled in particular to generate blowing and/or suction air.
  • a fan 14 is arranged on the sheet guiding element, in particular a sheet guiding plate 9, in such a way that it generates blowing and/or suction air in the region of the sheet guiding surface of the sheet guiding element, in particular the sheet guiding plate 9.
  • corresponding openings for example Venturi nozzles, are assigned to the sheet guiding element, in particular the sheet guiding plate 9, facing the sheet conveying path. Outside of any openings provided
  • the sheet guiding element, in particular sheet guiding plate 9, preferably has a closed sheet guiding surface.
  • a sheet guiding element in particular sheet guiding plate 9, can be designed such that a sheet guiding surface extends in the region of the outer surface of the sheet guiding cylinder, in particular impression cylinder 5, starting as far as the downstream sheet guiding cylinder, in particular impression cylinder 5, below the sheet conveying system, in particular sheet conveying drum 7.
  • a first region of the sheet guiding element, in particular sheet guiding plate 9, starting in the region of the upstream sheet guiding cylinder, in particular impression cylinder 5, can have the comb fingers 10 and be spaced further from the axis of rotation of the sheet conveying system, in particular sheet conveying drum 7, than a subsequent second region of the sheet guiding element, in particular sheet guiding plate 9.
  • the comb fingers 10 and the first region of the sheet guiding plate 9 preferably form a largely closed sheet guiding surface for the sheets.
  • the first region of the sheet guide plate 9 can begin in a rotation angle range of the sheet conveyor drum 7 that is spaced between 15° and 25°, in particular approximately 20°, from the transfer center formed by the gripper closure between the upstream printing cylinder 5 and the sheet conveyor drum 7.
  • the sheet guide plate 9 or the comb fingers 10 can be arranged at a distance of, for example, 2 mm to 50 mm, in particular between 25 mm and 30 mm, from the sheet conveyor path formed by the gripper impacts of the sheet conveyor drum 7.
  • the first region of the sheet guide plate 9 preferably steadily approaches the rotation axis of the sheet conveyor drum 7 or the sheet conveyor path.
  • the sheets are preferably guided concentrically to the axis of rotation of the sheet conveying drum 7 or a guide parallel to the gripper impact path of the sheet conveyor drum 7 or parallel to the sheet conveyor path.
  • the second region of the sheet guide plate 9 can, for example, be designed at a distance of 5 mm to 10 mm from the sheet conveyor path.
  • the second region of the sheet guide plate 9 can, for example, begin in a rotation angle range of 60° to 90° from the transfer center between the printing cylinder 5 and the sheet conveyor drum 7.
  • the sheet guide element in particular the sheet guide plate 9, can thus be designed such that its first region, which is upstream with respect to the sheet conveyor direction BFR, has a multiple, for example double or triple, distance from the gripper impact path or the sheet conveyor path compared to the downstream second region.
  • a deionization device 8 is arranged in the first region of the sheet guide plate 9, wherein, if comb fingers 10 are provided, said deionization device is arranged downstream of the comb fingers 10 in the sheet conveying direction BFR.
  • Comb fingers 10 can, for example, extend over a rotation angle range of the sheet conveying drum 7 of approximately 5°.
  • a deionization device 8 can be directly adjacent to the comb fingers 10 or extend over a rotation angle range of the sheet conveying drum 7 of at least approximately 10°.
  • the first region of the sheet guide plate 9 can merge into the second region within a rotation angle range of the sheet conveying drum 7 of, for example, approximately 60°, which is largely concentric with the sheet conveying path.
  • the machine 1 can have additional units or printing units 2, wherein some or preferably all units or printing units 2 comprise or contain sheet guiding elements, in particular sheet guiding plates 9, for sheet guidance.
  • the sheet guiding elements, in particular sheet guiding plates 9, of the machine 1 are in particular of identical construction.
  • the Fig. 2 shows an enlarged view of a sheet guide element designed as a sheet guide plate 9 with a deionization device 8.
  • the deionization device 8 here has a cassette arranged in the sheet guide plate 9 with at least one discharge electrode 12.
  • the cassette can preferably be embedded in the sheet guide plate 9 below a sheet conveyor system, in particular the sheet conveyor drum 7, and can also have several preferably identical discharge electrodes 12.
  • the cassette here preferably has two discharge electrodes 12.
  • the cassette is preferably arranged downstream of metallic comb fingers 10, wherein an upstream guide surface section 9.1 can also be formed between the comb fingers 10 and the cassette.
  • a downstream guide surface section 9.2 of the sheet guide plate 9 is preferably directly adjacent to the cassette of the deionization device 8.
  • the upstream guide surface section 9.1 and the downstream guide surface section 9.2 are part of a common guide surface of the sheet guiding element 9.
  • the upstream guide surface section 9.1 and/or the downstream guide surface section 9.2 are also made of metal.
  • the sheet guiding element in particular the sheet guiding plate 9, preferably merges tangentially into a concentric radius to the sheet conveying system, in particular the sheet conveying drum 7, in order to realize the optimal electrode spacing in the areas of the greatest distance of the guiding plate spiral, excluding the comb fingers 10.
  • the guide surface of the Sheet guiding element 9 in the sheet conveying direction BFR approaches the radius of the sheet conveying drum 7 and then guides around it concentrically to the radius of the sheet conveying drum 7.
  • the insulators 11 of the deionization device 8 are each arranged transversely to the sheet conveying direction BFR, preferably across the entire width of the sheet guide plate 9, and have surfaces arranged perpendicular to the sheet conveying path or to the sheet guiding surface of the sheet guide plate 9.
  • Each discharge electrode 12 is arranged here, in particular, between two insulators 11.
  • a front insulator 11 with respect to the sheet conveying direction BFR adjoins, with its vertical or tangential surface, the comb fingers 10, in particular metallic ones.
  • the sheet guide plate 9 preferably directly adjoins a vertical or tangential surface of a rear insulator 11, or the last insulator 11 with respect to the sheet conveying direction BFR.
  • the Fig. 4 shows an enlarged view of a sheet guiding element having a cover, in particular a sheet guiding plate 9.
  • the complete deionization device 8 or the complete discharge cassette can be arranged interchangeably in the sheet guiding plate 9.
  • the deionization device 8 can also be left in the sheet guiding element, for example rigidly or by displacement, wherein a cover, for example a cover part 13, can also close the opening.
  • a cover of the discharge-generating elements is provided by means of a cover made of non-conductive material, in particular plastic, which in particular has openings or cutouts.
  • the cutouts are preferably arranged such that the charge carriers of the discharge electrodes 12 are not influenced.
  • An arrangement above the discharge cassette is preferably such that the ions exit through preferably narrow slits and can thus reach the underside of the sheet.
  • the Fig. 5 shows, for example, a cover for a deionization device 8 of a sheet-processing machine, as described above.
  • the cover is arranged as a cover part 13 transversely to the sheet conveying direction BFR above the deionization device 8 (not shown), in particular a discharge electrode 12, and is in particular made entirely of a non-conductive material, in particular plastic.
  • the cover part 13 has a plurality of preferably uniformly arranged elongated holes oriented transversely to the sheet conveying direction BFR, which here, for example, have a dimension of 25 mm transversely to the sheet conveying direction BFR and 8 mm in the sheet conveying direction BFR.
  • each elongated hole is assigned a positive ion-emitting and a negative ion-emitting electrode tip of the deionization device 8, in particular the discharge electrode 12.
  • the electrode tips indicated here act through the elongated holes, but in particular do not protrude into the sheet guiding surface of the cover. The electrode tips are therefore preferably below the surface or spaced from the The arc guide surface of the cover part 13 is arranged.
  • a discharge electrode 12 has alternating, particularly equally spaced, positive and negative ion-emitting electrode tips, which can operate with or without blast air support.
  • the Fig. 6 shows a perspective view of a sheet guiding element, in particular a sheet guiding plate 9, having a cover part 13.
  • the cover part 13 is inserted in the sheet guiding plate 9 in such a way that a preferably continuous sheet guiding surface is formed which is as free from disruption as possible.
  • Blowing air openings in the sheet guiding element, in particular the sheet guiding plate 9, can be provided and are not shown.
  • Venturi nozzles are provided in the sheet guiding surface of the sheet guiding element, in particular the sheet guiding plate 9, which preferably blow to the side. These are particularly preferably arranged on the inlet and/or outlet side with a blowing direction component towards the edges of the sheet guiding surface.
  • the pressure forces of the flow on the sheet are merely a counterpart to its surface load, which for example is only 1 Pa for a 100 g/ m2 sheet and 0.5 Pa for e.g. For example, for a 28 g/ m2 sheet, the pressure drop would be almost 0 Pa.
  • the forces acting on the sheet through the Venturi nozzles depend on the flow gap between the sheet guide surface and the sheet. If the flow deviates from the balanced floating height, the force always aligns back to this balanced floating height.
  • the increase in pressure forces below the floating height as the sheet approaches the sheet guide surface is comparatively higher than the increase in suction forces as it moves away from the sheet guide surface beyond the floating height.
  • the mechanism of action is that disturbances are caused by the extreme adhesion forces resulting from the printing pressure between the sheet, in particular the foil sheet, and the sheet guide cylinder, in particular the printing cylinder 5.
  • the detachment forces only act tangentially.
  • the detachment forces in the sheet cause the sheet to intersect the radius of the sheet conveying drum as a secant, and the resulting "excess" of unwound sheet length allows the sheet adhering to the impression cylinder surface to continue following impression cylinder 5.
  • the electrostatic charge during such withdrawal from the sheet guide cylinder, in particular impression cylinder 5, would attract the sheet to the sheet guide element, in particular sheet guide plate 9, and would rest on it.
  • the existing air cushion of the sheet guide plate 9, as a surface load, could not create an equilibrium and thus a state of suspension against the unevenly distributed field forces of the electrostatic charge. This would lead to areas of intensive contact with the sheet guide plate 9.
  • any intensive contact with the sheet guide plate 9 leads to visible scratches in the surface of the sheets, in particular foil sheets, or to smearing phenomena, especially on paper sheets.
  • the special design of the sheet guide element described above, in particular a sheet guide plate 9, provides an effective distance-maintaining measure for scratch-free or smear-free guidance of sheets, in particular foil sheets, on the sheet guide surface under a sheet conveyor system, in particular the sheet conveyor drum 7, after the sheet has been detached from the sheet guide cylinder. in particular, printing cylinder 5.
  • the solution created prevents contact of the sheet, in particular the foil sheet, with the sheet guide element, in particular the sheet guide plate 9, especially with the comb and the following guide surface portions, and thus prevents scratches or smearing.
  • a control system or an automatic sensor-controlled regulation of one, several, or all of the discharge electrodes 12 of one, several, or all of the deionization devices 8 of the machine 1 can be provided in the machine 1.
  • individual discharge electrodes 12 or several discharge electrodes 12 of a deionization device 8 or several or all of the deionization devices 8 of the machine can be connected to a generator, in particular a high-voltage generator.
  • the discharge effect can be adjusted by controlling the generator.
  • the intensity of the deionization device 8 can be controlled or regulated using measuring technology in such a way that it is possible to control or regulate the discharge in accordance with the existing static on the sheet, in particular a foil sheet.
  • exchangeable discharge cassettes these can be arranged at a different location on the machine 1.
  • a cassette or deionization device 8 can be used in the turning area.
  • the unloading cassettes can thus be designed to be interchangeable or modular in machine 1.
  • the Fig. 7 shows a section of a sheet-processing machine 1, for example, equipped for foil sheet processing, in particular as described above, with a turning device 3 and with a sheet guiding element.
  • the turning device 3 is designed here as a three-drum turning device and contains a transfer drum 15, a storage drum 16 and a turning drum 17.
  • the turning device 3 is preferably arranged between printing units 2 of the machine 1, wherein the transfer drum 15 is directly connected to a sheet-guiding cylinder, in particular a printing cylinder 5, of a printing unit 2.
  • a sheet-guiding cylinder, in particular an impression cylinder 5, of the following printing unit 2 is arranged upstream of the turning drum 17, or downstream of the turning drum 17.
  • the impression cylinders 5 are in turn operatively connected to a blanket cylinder 6, and this further to a plate cylinder (not shown) in the printing units 2, as described above.
  • the machine 1 can be switched between the straight-printing and perfecting modes, whereby in the straight-printing mode, the sheet is conveyed without turning by transferring the leading edge of the sheet between the drums.
  • the transfer drum 15 and the turning drum 17 of the turning device 3 are, for example, single-sized, and the storage drum 16 is, for example, double-sized.
  • the transfer drum 15 has a gripper system (not shown) arranged in a gripper channel for clamping the sheets at the leading edge.
  • the sheets are transferred at the gripper closure to a gripper system (also not shown) of the storage drum 16, which is also arranged in a gripper channel.
  • the turning drum 17 contains a gripper system (also not shown) for sheet conveying, in particular grippers and/or suction cups, which are pivotally mounted in the turning drum 17.
  • the turning drum 17 can also contain a pincer gripper system for receiving or conveying the sheets.
  • Other cylinder arrangements or other cylinder sizes are also usable.
  • the transfer drum 15 can also be double-sized.
  • the sheets are picked up by the gripper system of the turning drum 17 in a transfer center at the leading edge by a gripper system of the storage drum 16.
  • this sheet is guided past the transfer center by the storage drum 16 and picked up by the gripper system of the turning drum 17 at the trailing edge.
  • This picked up sheet is then The sheet is turned according to the trailing edge turning principle as the turning drum 17 rotates, so that its old trailing edge becomes the new leading edge upon reversal of its movement, and the old leading edge lying on the storage drum 16 becomes the new trailing edge.
  • a sheet guiding element is assigned to the turning device 3 to assist sheet guidance, particularly in the perfecting mode of operation.
  • a sheet guiding element particularly designed as a sheet guiding plate 9, can be arranged below the storage drum 16 and turning drum 17 to assist sheet guidance.
  • the sheet guiding element, in particular sheet guiding plate 9, can also be designed, for example, as a sheet guiding element that can be displaced depending on the mode of operation, in particular sheet guiding plate 9.
  • Such a displaceable sheet guiding element, in particular sheet guiding plate 9, can be fed to the sheet conveying path for sheet guidance, at least in the perfecting mode of operation.
  • the storage drum 16 can, for example, have format-adjustable shell segments that interlock like a comb when the format is adjusted and form the sheet-supporting shell surface.
  • the two gripper systems of the double-sized storage drum 16, arranged diametrically opposite one another, for the leading edges of the sheets are located on preferably fixed front shell segments.
  • the rear shell segments, which are adjustable relative to the front shell segments, can each have fixing systems, in particular suction systems, for example rotary suction cups and/or tensioning suction cups, for taking over and guiding the trailing edges of the sheets.
  • suction systems for example rotary suction cups and/or tensioning suction cups
  • the sheet can preferably be tightened by the fixing systems, in particular suction systems such as the rotary suction cups or also tightening suction cups in the tines of the rear adjustable casing segments of the storage drum 16.
  • the sheet guiding element arranged below the storage drum 16 and the turning drum 17 can be designed to be adjustable so that its sheet guiding surface is aligned at least approximately parallel to the sheet conveying path.
  • the sheet conveying path corresponds at least approximately to a surface that is tangential to both the outer surface of the storage drum 16 and the turning drum 17.
  • the sheet guiding surface of the sheet guiding element, in particular of the sheet guiding plate 9, can also be slightly approximated to the turning drum 17.
  • the sheet guiding element, in particular the sheet guiding plate 9, has, at least in some regions, a flat guide surface 9.3, which is particularly preferably located below the turning drum 17, in particular below the rotational axis of the turning drum 17.
  • a deionization device 8 is assigned to the sheet guiding element, in particular to the flat guide surface 9.3 of the sheet guiding plate 9.
  • the deionization device 8 has at least one discharge electrode 12 for discharging a sheet.
  • the deionization device 8, in particular the at least one discharge electrode 12, ensures that a discharged sheet is freed from electrostatic forces, allowing it to be flattened and pass through the subsequent printing nip or printing zone without waves or wrinkles.
  • the Fig. 8a shows an embodiment of a sheet guide plate 9 of the turning device 3 with a discharge electrode 12 mounted thereon.
  • the discharge electrode 12 is arranged transversely to the sheet conveying direction BFR, preferably across the machine width, and is provided with corresponding electrical connections.
  • the discharge electrode 12 is preferably assigned to the flat guide surface 9.3 of the sheet guide plate 9, wherein the flat guide surface 9.3 in the sheet conveying direction BFR can be adjoined by an area approximating the turning drum 17.
  • at least one fan 14 can be assigned to the sheet guide element, in particular the sheet guide plate 9, which fan can be controlled in particular to generate blowing and/or suction air.
  • the sheet guiding element in particular the sheet guiding plate 9, is provided with corresponding openings, for example Venturi nozzles, facing the sheet conveying path.
  • suction and/or blowing air can be generated by the fan 14 at least in the area of the flat guide surface 9.3 of the sheet guiding plate 9.
  • the fan 14 can be provided in the area of the discharge electrode 12 on the opposite side of the sheet guiding plate 9.
  • the sheet guiding element, in particular the sheet guiding plate 9, can also be designed as a single piece or consist of several sections, whereby a fan 14 can also be assigned to an upstream section arranged largely below the storage drum 16.
  • the Fig. 8b shows an embodiment of a sheet guide plate 9 of the turning device 3 with an integrated deionization device 8.
  • the deionization device 8 can have a cassette, which is particularly designed to be replaceable and is embedded in the sheet guide plate 9.
  • the deionization device 8 preferably has a plurality of discharge electrodes 12, which are arranged at a distance from one another transversely to the sheet conveying direction BFR, preferably across the machine width. Between the discharge electrodes 12, which are preferably embedded here, insulators 11 are preferably positioned, the surfaces of which adjoin tangentially to the sheet guide plate 9, in particular as already described above.
  • the sheet guide element in particular sheet guide plate 9, can preferably be assigned at least one fan 14 for generating blowing and/or suction air, in particular at least in the region of the flat guide surface 9.3, as described above.
  • a cover can be provided for the at least one embedded discharge electrode 12 to create a largely closed sheet guide surface in the region of the discharge electrode 12.
  • a cover part (not shown) having openings adapted to one or more discharge electrodes 12 can be assigned to the sheet guide plate 9, in particular directly above the discharge electrode 12 or discharge electrodes 12, in particular as described above.
  • the cover part (not shown) can be designed or arranged as described above.
  • One of the described sheet guiding elements is assigned to the transfer area between the storage drum 16 and the turning drum 17 in the machine 1.
  • a sheet guiding plate 9 delimits in particular the long side of the turning area downwards and is arranged at a distance from the cylinder tangent between the storage drum 16 and the turning drum 17 such that the distance to the sheet corresponds to the optimal electrode spacing.
  • the fixing systems in particular suction systems such as rotary suction cups and/or tensioning suction cups, of the storage drum 16 can be used to fix the sheet lying on the storage drum 16 so that the sheet is additionally stretched or taut near the cylinder tangent between the storage drum 16 and the turning drum 17.
  • This sheet conveyor system is preferably designed as a chain conveyor system with two delivery chains, each guided laterally on the frame of the delivery 4, between which gripper carriages are arranged at equal distances and are arranged parallel to each other.
  • the gripper carriages have sheet-fixing systems with which the sheets to be conveyed are gripped at the leading edge.
  • the gripper carriages can accordingly pick up the leading edges of the sheets from the last sheet-guiding cylinder of machine 1 at the gripper closure.
  • the continuously rotating, driven and guided gripper carriages have gripper fingers that can be moved, particularly against fixed gripper impacts, for picking up the sheets, preferably at the leading edge, from the last sheet-guiding cylinder of machine 1.
  • the gripper carriages are guided by the delivery chains on a gripper carriage track in the sheet conveying direction BFR up over the delivery pile, where the gripper carriages release the sheets for stacking.
  • the clamped leading edges of the sheets are released by lifting the gripper fingers from the gripper stops permanently attached to the gripper carriage.
  • the movement of the gripper fingers can be controlled by control cams and control levers via a gripper shaft on which the gripper fingers are permanently attached.
  • a sheet brake is preferably arranged upstream of the delivery pile, which decelerates the sheets to be deposited from machine speed to stacking speed after they have been released.
  • the sheets After deceleration by the sheet brake, the sheets are aligned, for example, against leading, trailing and/or side edge stops and neatly deposited on the delivery pile.
  • the delivery pile is lowered by a pile lifting drive during the sheet depositing process in such a way that the delivery pile surface forms an at least approximately constant deposit level for the incoming sheets.
  • At least one mechanical sheet guide element is arranged below the sheet conveyor path in delivery 4, which guides the sheets after the last sheet guide cylinder on their way to the delivery pile.
  • the endlessly rotating gripper carriages of the chain conveyor system for example, the sheets that have been fully printed on both sides in machine 1, are picked up from the last Sheet guiding cylinders convey the sheet to the delivery pile.
  • the gripper stops rotating with the gripper carriages describe a gripper stop path which largely corresponds to the sheet conveying path or limits and thus defines it on one side.
  • the last sheet guiding cylinder of the machine 1 is in particular an impression cylinder 5 of the last printing, coating, drying, inspection or finishing unit, which in particular has an at least approximately closed outer surface.
  • the impression cylinder 5 is preferably double-sized and contains two gripper systems arranged diametrically opposite one another in gripper channels, as already described above. These gripper systems in particular also have movable gripper fingers corresponding to the gripper stops which limit or define the sheet conveying path. The leading edges of the sheets are taken over by these gripper systems by the gripper carriages of the chain conveyor system in the gripper closure. To take over the leading edge of the sheet, the gripper fingers of the impression cylinder 5 are set at a gap to the gripper fingers of the gripper carriages. This transfer of the sheet leading edge takes place in a transfer center, in which the sheet leading edge is briefly fixed by both grippers.
  • the chain conveyor system in the delivery 4 has a sprocket shaft arranged adjacent to the last sheet guiding cylinder, in particular printing cylinder 5, with two coaxial and spaced-apart sprockets 18, which are firmly connected to the sprocket shaft.
  • the delivery chains run over the sprockets 18 and can be driven by them in rotation.
  • the sprocket shaft can be driven, for example, via the continuous drive gear train together with sheet conveying systems and sheet guiding cylinders in the units or printing units 2 of the machine 1.
  • the sheet guiding element which is preferably designed as a sheet guiding plate 9 extending across the machine width and arranged between the side walls. This sheet guiding plate 9 preferably has an at least approximately closed surface for the sliding and/or floating guidance of the sheets.
  • the sheet guide plate 9 can be provided with an ink-repellent coating. Furthermore, nozzle openings, in particular Venturi nozzles, can be assigned to the sheet guide plate 9 for pneumatically guiding the sheets.
  • one or more blow boxes or fans 14 can be arranged below the sheet guide plate 9, which can also be formed from joined partial guide plates, via which blow boxes or fans 14 can be supplied with blow air and/or suction air to the blow air nozzles of the sheet guide plate 9, so that a supporting air cushion can be formed between the sheet guide plate 9 and the sheets conveyed or transported by the gripper carriages, in particular for perfecting.
  • the sheet guide element, in particular sheet guide plate 9, can be assigned a preferably deactivatable smoothing device. Such a smoothing device can be deactivated or is not used when sheets with fresh ink, for example in perfecting or foil sheets, are transported or guided.
  • the sheet guide elements, in particular sheet guide plates 9, of the machine 1 are in particular of identical construction. To prevent the sheets from sticking to the delivery pile, dryers and/or powder devices (not shown in detail) can be provided in the delivery 4. It is also possible to integrate a coolant circuit in the sheet guide element in order to control or regulate the heating of the sheet guide element.
  • the sprocket shaft can contain, in addition to the sprockets 18 for the circulating delivery chains, two or more support discs or suction discs or individual suction cups, such as corner suction cups.
  • the support discs can be designed with or without corner suction cups, or the suction discs can be axially displaceable and adjustable to the respective sheet side edges.
  • Such discs can also be axially adjusted automatically and/or independently of one another.
  • Such discs in particular, contain circumferential support surfaces which ensure a minimal axial extension.
  • a respective sheet can be fixed on the outer surface of the sheet guide cylinder, in particular impression cylinder 5, during sheet transfer. A sheet fall is thus avoided as long as the sheet is located between the disks and the last sheet guide cylinder, in particular impression cylinder 5.
  • the sheets are pressed against the outer surface of the impression cylinder 5 in small press gaps by support elements arranged on brackets.
  • the support elements can have elastic surfaces.
  • Such disks are preferably also designed to be twice the size and can preferably have recesses for the rotating gripper carriages of the chain conveyor system.
  • the Fig. 10 shows a final sheet guiding cylinder, in particular impression cylinder 5, of machine 1 with a downstream sprocket 18 of the sprocket shaft and a sheet guiding element arranged below the sprocket shaft, in particular a sheet guiding plate 9 described above.
  • a connecting line is drawn between the rotational axis of the sprocket 18 and the rotational axis of the impression cylinder 5, on which the transfer center is located in the transfer area.
  • the sheet guiding plate 9 Arranged below the sprocket shaft is the sheet guiding plate 9, which, in the area facing the impression cylinder 5, has, in particular, metallic comb fingers 10, in particular as already described for the printing unit 2.
  • the sheet guide plate 9 is preferably spaced further from the axis of rotation of the sprocket shaft or sprocket 18 than the adjoining areas of the sheet guide plate 9 in the sheet conveying direction BFR.
  • the comb fingers 10 can, for example, be arranged at a distance of a few millimeters, for example between 1 and 10 mm, preferably between 2 mm and 3 mm, from the outer surface of the impression cylinder 5.
  • the sheet guide plate 9 in the delivery 4 is designed to be at least approximately identical in construction to the sheet guide plates 9 in the printing units 2 or units of the machine 1. This preferably ensures the same favorable sheet guiding conditions throughout the entire machine 1.
  • the Fig. 11 shows a sheet guiding cylinder, in particular a printing cylinder 5, for example as described above, with a downstream sprocket shaft and a sheet guiding element, in particular a sheet guiding plate 9, arranged below the sprocket shaft and having a cover, as described above.
  • the sheet guiding plate 9, shown in side view, has a cover, in particular a cover part 13 containing the above-described non-conductive or non-metallic material or consisting of non-conductive or non-metallic material.
  • the deionization device 8 can, for example, be removed from the sheet guiding element, in particular the sheet guiding plate 9.
  • the deionization device 8 can, for example, be removed below or between sprockets 18 of the sprocket shaft.
  • the deionization device 8 can, for example, be removed laterally and/or by displacing at least part of the sheet guiding plate 9.
  • the cover in particular the cover part 13, closes the opening required by the deionization device 8.
  • the cover is preferably dimensioned or attachable in such a way that a continuous or almost full-surface sheet guide surface of the sheet guide plate 9 is created.
  • the cover part 13 can be designed or arranged as already described above.
  • a sheet conveying system in the turning device 3 and/or in a unit or printing unit 2 in particular a turning drum 17 or sheet conveying drum 7 or a gripper carriage in the delivery 4, the sheets are taken over by a sheet guiding cylinder, in particular a storage drum 16 or a printing cylinder 5, and guided along the sheet guiding element, in particular the sheet guiding plate 9, on the sheet conveying path past a deionization device 8.
  • a device can be provided in the area of a transfer drum or a sprocket shaft, which additionally guides the sheet past the gripper impact path in a defined manner, held only at the edges, so that the optimal electrode spacing is maintained over the entire sheet length and the sheet does not prematurely touch the sheet guide plate 9 and falls below the said optimal electrode distance.
  • the detachment of the sheets, in particular foil sheets, from the outer surface of the sheet guide cylinder, in particular the printing cylinder 5, is carried out by the sheet guide element, in particular the sheet guide plate 9, preferably with a spiral shape.
  • the comb fingers 10 of the sheet release loop deviate from the outer surface at a suitable distance during withdrawal. Allowing a minimal withdrawal loop advantageously increases the detaching radial component of the withdrawal forces.
  • the at least one discharge electrode 12, particularly embedded at the beginning of the guide plate, ensures charge equalization on the sheet until it is sufficiently neutral, so that the sheet is not attracted to the sheet guide element, in particular the sheet guide plate 9, as an electrical conductor.
  • the deionization device 8, in particular, provides positive and negative ions to compensate for the changing charge states on the sheet surface.
  • a deionization device 8 is used in particular in each printing unit 2 or unit of the press 1, because the sheet, especially foil sheets, is extremely recharged during each printing process.
  • the sheets are optimally unloaded, in particular, by the deionization device 8 of the or each printing unit 2, preferably each unit, the turning device 3 and/or the delivery 4. Unloading makes it possible to continuously deliver the sheet in a suspended state to the next conveyor system, for example, a printing cylinder 5 or a gripper carriage. without the sheet being scratched by contact with the sheet guiding element, in particular a sheet guiding plate 9.
  • the one or more discharge electrodes 12 of a respective deionization device 8 ensure, in particular, an active discharge with both positive and negative ions.
  • the generators provided preferably operate in a range of 3 to 6 kV, optimally with a high voltage of at least approximately 4.5 kV. The high voltage can also be adjusted depending on the determined electrostatic charge.
  • the deionization devices 8 discharge a respective sheet so that the deionized sheets, free from electrostatic forces, lie flat on the sheet guiding plate 9 or the air cushion generated by the sheet guiding plate 9. The sheets remain deformed and smear-free across the entire machine 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)
  • Registering Or Overturning Sheets (AREA)

Claims (35)

  1. Machine de traitement de feuilles (1) comprenant des groupes traitant des feuilles, dans laquelle la machine (1) contient au moins deux groupes d'impression (2) pour traiter des feuilles, dans laquelle les groupes d'impression (2) contiennent respectivement un cylindre porte-blanchet (6) et un cylindre porte-plaque et un cylindre porte-blanchet (6) d'un groupe d'impression (2) coopère avec respectivement un cylindre de guidage de feuilles (5), dans laquelle un système de transport de feuilles (7) est prévu entre deux cylindres de guidage de feuilles (5), dans laquelle les feuilles sont transportées le long d'une voie de transport de feuilles par les cylindres de guidage de feuilles (5) et les systèmes de transport de feuilles (7) de la machine (1), dans laquelle un élément conducteur de feuilles (9) commençant dans la zone du cylindre de guidage de feuilles (5) est prévu au-dessous et le long de la voie de transport de feuilles dans un ou tous les groupes d'impression (2) et dans laquelle des systèmes de déionisation (8) sont prévus au moins dans les groupes d'impression (2) de la machine (1), lesquels sont situés en aval de la fente d'impression du premier groupe d'impression (2) de la machine (1) par rapport à la direction de transport de feuilles (BFR).
  2. Machine de traitement de feuilles selon la revendication 1, dans laquelle la machine (1) contient une pluralité de groupes d'impression (2) et un ou plusieurs groupes de vernissage pour traiter des feuilles et des systèmes de déionisation (8) sont prévus au moins dans les groupes d'impression (2) et groupes de vernissage de la machine (1), lesquels sont situés en aval de la fente d'impression du premier groupe d'impression (2) de la machine (1) par rapport à la direction de transport de feuilles (BFR).
  3. Machine de traitement de feuilles selon la revendication 1 ou 2, dans laquelle respectivement un dispositif de déionisation (8) de ce type est prévu également dans un ou chaque groupe supplémentaire, comme un groupe de séchage, d'inspection ou de finition.
  4. Machine de traitement de feuilles selon la revendication 1, 2 ou 3, dans laquelle un dispositif de déionisation (8) est également associé à un groupe de contact et/ou au premier groupe d'impression (2) de la machine (1).
  5. Machine de traitement de feuilles selon la revendication 1, 2, 3 ou 4, dans laquelle exclusivement un dispositif de déionisation (8) est disposé dans chaque groupe d'impression (2) et/ou groupe de vernissage.
  6. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4 ou 5, dans laquelle les éléments conducteurs de feuilles (9), en particulier tôles conductrices de feuilles (9), de la machine (1) sont conçus avec une structure identique.
  7. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5 ou 6, dans laquelle la tôle conductrice de feuilles (9) dans le dispositif de réception (4) est conçue avec une structure au moins à peu près identique à celle des tôles conductrices de feuilles (9) dans les groupes d'impression (2) ou groupes de la machine (1).
  8. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6 ou 7, dans laquelle l'intégralité du dispositif de déionisation (8) ou l'intégralité de la cassette de déchargement est disposée de manière interchangeable dans la tôle conductrice de feuilles (9).
  9. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7 ou 8, dans laquelle les cassettes de déchargement dans la machine (1) sont conçues de manière mutuellement interchangeable ou présentent une structure modulaire.
  10. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8 ou 9, dans laquelle un tel élément conducteur de feuilles (9) est conçu sous la forme d'une tôle conductrice de feuilles (9) et présente dans la zone tournée vers le cylindre de guidage de feuilles (5) des doigts de peigne (10), dans laquelle respectivement un dispositif de déionisation (8) se raccorde aux doigts de peigne (10) par rapport à la direction de transport de feuilles (BFR).
  11. Machine de traitement de feuilles selon la revendication 10, dans laquelle des ouvertures d'air de soufflage pouvant être sollicitées avec une surpression sont associées aux surfaces de guidage de feuilles des doigts de peigne (10).
  12. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ou 11, dans laquelle le premier tronçon de l'élément conducteur de feuilles (9) présente à partir de la zone du cylindre de guidage de feuilles (5) une surface de guidage de feuilles se rapprochant progressivement de l'axe de rotation du système de transport de feuilles (7).
  13. Machine de traitement de feuilles selon la revendication 10, 11 ou 12, dans laquelle les doigts de peigne (10) de la tôle conductrice de feuilles (9) sont constitués en partie ou entièrement d'un matériau métallique.
  14. Machine de traitement de feuilles selon la revendication 10, 11, 12 ou 13, dans laquelle une première zone de l'élément conducteur de feuilles (9) commençant dans la zone du cylindre de guidage de feuilles (5) situé en amont présente les doigts de peigne (10) et est plus espacée de l'axe de rotation du système de transport de feuilles (7) qu'une deuxième zone suivante de l'élément conducteur de feuilles (9).
  15. Machine de traitement de feuilles selon la revendication 10, 11, 12, 13 ou 14, dans laquelle une surface de guidage de feuilles en grande partie fermée pour les feuilles est formée par les doigts de peigne (10) et la première zone de la tôle conductrice de feuilles (9).
  16. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 ou 15, dans laquelle la tôle conductrice de feuilles (9) ou les doigts de peigne (10) sont disposés à une distance de 2 mm à 50 mm, en particulier comprise entre 25 mm et 30 mm, de la voie de transport de feuilles formée par les butées de pinces d'un tambour de transport de feuilles (7).
  17. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 ou 16, dans laquelle la surface de guidage de feuilles de la tôle conductrice de feuilles (9) formée par les doigts de peigne (10) et/ou le dispositif de déionisation (8) se rapproche progressivement de l'axe de rotation du tambour de transport de feuilles (7) ou de la voie de transport de feuilles vu dans la direction de transport de feuilles (BFR).
  18. Machine de traitement de feuilles selon la revendication 10, 11, 12, 13, 14, 15, 16 ou 17, dans laquelle les doigts de peigne (10) sont disposés à une distance comprise entre 1 et 10 mm, de préférence entre 2 mm et 3 mm, de la surface d'enveloppe d'un cylindre d'impression (5).
  19. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 ou 18 pour le traitement de feuilles filmées avec un dispositif de réception (4), dans laquelle un dispositif de réception (4) avec un circuit à chaîne de dispositif de réception (18), qui au moyen de chariots à pinces réceptionne les feuilles du dernier cylindre de guidage de feuilles (5) et les transporte vers une pile de réception, est situé en aval du dernier groupe de la machine (1), dans laquelle au moins un élément conducteur de feuilles (9) mécanique est disposé sur la voie de transport de feuilles menant à la pile de réception dans le dispositif de réception (4) au-dessous de la voie de transport de feuilles, lequel guide les feuilles après le dernier cylindre de guidage de feuilles (5) sur la voie menant à la pile de réception et dans laquelle un dispositif de déionisation (8) est associé à la première partie de l'élément conducteur de feuilles (9).
  20. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 ou 19, dans laquelle la machine (1) présente un paquet de traitement de feuilles filmées, lequel est particulièrement adapté au matériau en film, en particulier film en PVC, PP, PS, PET.
  21. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 ou 20, dans laquelle la machine (1) contient au moins un groupe d'application de couche de fond et/ou contient un système de contrôle de double feuille spécial et/ou les systèmes de pinces de la machine (1) sont adaptés à la faible épaisseur du matériau de feuilles filmée et/ou les encres d'impression et/ou vernis ou les sécheurs utilisés sont adaptés au matériau de film.
  22. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 ou 21, dans laquelle la machine (1) contient au moins un groupe d'application de couche de fond situé en amont des groupes d'impression (2).
  23. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 ou 22, dans laquelle un système de lissage désactivable est associé à l'élément conducteur de feuilles (9) dans le dispositif de réception (4).
  24. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 ou 23, dans laquelle un recouvrement des éléments générant une décharge est prévu au moyen d'un cache en matériau non conducteur, en particulier une matière plastique, lequel présente en particulier des ouvertures ou découpes qui sont disposées de sorte que les porteurs de charge des électrodes de décharge (12) ne sont pas influencés.
  25. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 ou 24, dans laquelle l'intensité du dispositif de déionisation (8) est commandée ou régulée par technique de mesure, de sorte qu'il est possible de commander ou réguler la décharge de manière adaptée à la statique présente sur la feuille, en particulier feuille filmée.
  26. Machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 ou 25 avec un système de renversement (3), dans laquelle dans le système de renversement (3) les feuilles peuvent être réceptionnées d'un cylindre de guidage de feuilles (16) par un système de transport de feuilles (17) et peuvent être transportées sur une voie de transport de feuilles dans la direction de transport de feuilles (BFR), dans laquelle un élément conducteur de feuilles (9) est prévu au-dessous et/ou le long de la voie de transport de feuilles et dans laquelle un dispositif de déionisation (8) est associé à l'élément conducteur de feuilles (9).
  27. Utilisation de la machine de traitement de feuilles selon la revendication 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 ou 26 pour le traitement de feuilles filmées, dans laquelle le matériau de film est un film en PVC, PP, PS, PET.
  28. Procédé pour transporter des feuilles dans une machine de traitement de feuilles (1), dans lequel les feuilles sont transportées dans plusieurs groupes d'impression (2) ou dans plusieurs groupes d'impression (2) et un dispositif de réception (4) de la machine (1), dans lequel les feuilles dans les groupes d'impression (2) sont imprimées dans des fentes d'impression, dans lequel les feuilles dans les groupes d'impression (2) ou dans les groupes d'impression (2) et le dispositif de réception (4) sont réceptionnées respectivement d'un cylindre de guidage de feuilles (5) par un système de transport de feuilles (7, 18) et transportées dans la direction de transport de feuilles (BFR) sur une voie de transport de feuilles le long d'un élément conducteur de feuilles (9), dans lequel les feuilles sont guidées dans les groupes d'impression (2) ou dans les groupes d'impression (2) et le dispositif de réception (4) respectivement par un élément conducteur de feuilles (9) commençant au-dessous et le long de la voie de transport de feuilles dans la zone du cylindre de guidage de feuilles (5), dans lequel les feuilles sont amenées à passer devant un dispositif de déionisation (8) associé à l'élément conducteur de feuilles (9), dans lequel une fourniture d'ions positifs et négatifs est effectuée par le dispositif de déionisation (8) afin de compenser les états de charge variables sur la surface des feuilles et dans lequel les feuilles après chaque fente d'impression dans les groupes d'impression (2) ou dans les groupes d'impression (2) et le dispositif de réception (4) sont amenées à passer devant un dispositif de déionisation (8).
  29. Procédé selon la revendication 28, dans lequel les feuilles dans au moins un groupe (2) et/ou le dispositif de réception (4) de la machine (1) sont réceptionnées d'un cylindre de guidage de feuilles (5) par un système de transport de feuilles (7, 18) et sont transportées dans la direction de transport de feuilles (BFR) sur une voie de transport de feuilles, dans lequel les feuilles sont guidées par un élément conducteur de feuilles (9) disposé au-dessous et le long de la voie de transport de feuilles, dans lequel les feuilles sont tout d'abord guidées sur une surface de guidage de feuilles de l'élément conducteur de feuilles (9) présentant un dispositif de déionisation (8), laquelle est plus espacée d'un axe de rotation du système de transport de feuilles (7, 18) associé que d'une surface de guidage de feuilles de l'élément conducteur de feuilles (9) se raccordant dans la direction de transport de feuilles (BFR).
  30. Procédé selon la revendication 28 ou 29, dans lequel les feuilles sont enlevées de la surface d'enveloppe du cylindre de guidage de feuilles (5) par des doigts de peigne (10) en particulier à action pneumatique et/ou métalliques de l'élément conducteur de feuilles (9) commençant dans la zone du cylindre de guidage de feuilles (5) et guidées vers un ou le dispositif de déionisation (8).
  31. Procédé selon la revendication 28, 29 ou 30, dans lequel les feuilles sont guidées après un ou le dispositif de déionisation (8) de manière concentrique par rapport à l'axe de rotation du système de transport de feuilles (7, 18) jusqu'à un cylindre de guidage de feuilles (5) situé en aval.
  32. Procédé selon la revendication 28 ou 29, dans lequel une adaptation de la décharge par un ou plusieurs systèmes de déionisation (8) à l'électrostatique d'une feuille respective ou d'une pluralité de feuilles est prévue par un système de commande ou de régulation.
  33. Procédé selon la revendication 28, 29 ou 32, dans lequel en fonction de l'ordre actuel un cache (13) avec ou sans ouvertures est utilisé pour la fabrication d'une surface de guidage de feuilles sur le dispositif de déionisation (8).
  34. Procédé selon la revendication 28, 29, 32 ou 33, dans lequel des substrats d'impression de faible grammage inférieur à 150 g/m2 et de préférence inférieur à 80 g/m2 et/ou des feuilles filmées sont traités ou imprimés par la machine (1).
  35. Utilisation d'un élément conducteur de feuilles (9) contenant un dispositif de déionisation (8) dans tous les groupes d'impression (2) et un dispositif de réception (4) ou dans tous les groupes d'impression (2), un système de renversement (3) et un dispositif de réception (4) d'une presse à feuilles, en particulier d'une presse offset à feuilles en construction modulaire et en série.
EP23159098.5A 2019-07-09 2020-06-02 Machine de traitement de feuilles, utilisation de la machine de traitement de feuilles, procédé de transport de feuilles et utilisation d'éléments conducteurs de feuilles contenant des dispositifs de désionisation Active EP4209349B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102019118568.8A DE102019118568A1 (de) 2019-07-09 2019-07-09 Bogenverarbeitende Maschine mit einer Wendeeinrichtung und Verfahren zum Fördern von Bogen
EP20730020.3A EP3953181B1 (fr) 2019-07-09 2020-06-02 Machine de traitement de feuilles comprenant un dispositif d'inversion, procédé de transport de feuilles et utilisation d'éléments de guidage de feuilles contenant des dispositifs de désionisation
PCT/EP2020/065174 WO2021004696A1 (fr) 2019-07-09 2020-06-02 Machine de traitement de feuilles comprenant un dispositif d'inversion, procédé de transport de feuilles et utilisation d'éléments de guidage de feuilles contenant des dispositifs de désionisation

Related Parent Applications (1)

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EP20730020.3A Division EP3953181B1 (fr) 2019-07-09 2020-06-02 Machine de traitement de feuilles comprenant un dispositif d'inversion, procédé de transport de feuilles et utilisation d'éléments de guidage de feuilles contenant des dispositifs de désionisation

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EP4209349A1 EP4209349A1 (fr) 2023-07-12
EP4209349B1 true EP4209349B1 (fr) 2025-10-08

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EP20730020.3A Active EP3953181B1 (fr) 2019-07-09 2020-06-02 Machine de traitement de feuilles comprenant un dispositif d'inversion, procédé de transport de feuilles et utilisation d'éléments de guidage de feuilles contenant des dispositifs de désionisation
EP23159101.7A Active EP4209351B1 (fr) 2019-07-09 2020-06-02 Machine de traitement de feuilles, utilisation de la machine de traitement de feuilles, procédé de transport de feuilles et utilisation d'éléments conducteurs de feuilles contenant des dispositifs de désionisation
EP23159100.9A Active EP4209350B1 (fr) 2019-07-09 2020-06-02 Machine de traitement de feuilles, utilisation de la machine de traitement de feuilles et procédé de transport de feuilles
EP23159098.5A Active EP4209349B1 (fr) 2019-07-09 2020-06-02 Machine de traitement de feuilles, utilisation de la machine de traitement de feuilles, procédé de transport de feuilles et utilisation d'éléments conducteurs de feuilles contenant des dispositifs de désionisation
EP23159102.5A Active EP4209352B1 (fr) 2019-07-09 2020-06-02 Machine de traitement de feuilles, utilisation de la machine de traitement de feuilles, procédé de transport de feuilles et utilisation d'éléments conducteurs de feuilles contenant des dispositifs de désionisation

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EP20730020.3A Active EP3953181B1 (fr) 2019-07-09 2020-06-02 Machine de traitement de feuilles comprenant un dispositif d'inversion, procédé de transport de feuilles et utilisation d'éléments de guidage de feuilles contenant des dispositifs de désionisation
EP23159101.7A Active EP4209351B1 (fr) 2019-07-09 2020-06-02 Machine de traitement de feuilles, utilisation de la machine de traitement de feuilles, procédé de transport de feuilles et utilisation d'éléments conducteurs de feuilles contenant des dispositifs de désionisation
EP23159100.9A Active EP4209350B1 (fr) 2019-07-09 2020-06-02 Machine de traitement de feuilles, utilisation de la machine de traitement de feuilles et procédé de transport de feuilles

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US (1) US11498790B2 (fr)
EP (5) EP3953181B1 (fr)
JP (2) JP7315720B2 (fr)
CN (2) CN113891801A (fr)
DE (1) DE102019118568A1 (fr)
WO (1) WO2021004696A1 (fr)

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DE102021105640A1 (de) 2021-03-09 2022-09-15 Koenig & Bauer Ag Siebdruckeinheit mit zwei Basismodulen
DE102021105636A1 (de) 2021-03-09 2022-09-15 Koenig & Bauer Ag Siebdruckeinheit und eine als Siebdruckeinheit ausgebildete Bogendruckeinheit
DE102021105634A1 (de) * 2021-03-09 2022-09-15 Koenig & Bauer Ag Siebdruckeinheit und ein Verfahren zum Betreiben einer als Siebdruckeinheit ausgebildeten Bogendruckeinheit
DE102023104095A1 (de) * 2023-02-20 2024-08-22 Koenig & Bauer Ag Bogenrotationsdruckmaschine mit Elektrodeneinheit
WO2025049121A1 (fr) * 2023-08-30 2025-03-06 Applied Materials, Inc. Détection triboélectrique pour la caractérisation d'un substrat polymère
CN117445562B (zh) * 2023-12-08 2025-09-30 潍坊瑞可智能科技有限公司 免叼牙滚筒式单喷头数字喷墨印刷机及印刷控制方法

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JP2022525694A (ja) 2022-05-18
JP2023100742A (ja) 2023-07-19
JP7573063B2 (ja) 2024-10-24
WO2021004696A1 (fr) 2021-01-14
DE102019118568A1 (de) 2021-01-14
US11498790B2 (en) 2022-11-15
CN116039240A (zh) 2023-05-02
EP4209352B1 (fr) 2025-10-08
EP3953181A1 (fr) 2022-02-16
EP4209350A1 (fr) 2023-07-12
US20220204295A1 (en) 2022-06-30
EP3953181B1 (fr) 2023-03-01
EP4209351B1 (fr) 2023-10-18
EP4209350B1 (fr) 2025-10-29
CN113891801A (zh) 2022-01-04
EP4209351A1 (fr) 2023-07-12
EP4209352A1 (fr) 2023-07-12
EP4209349A1 (fr) 2023-07-12
JP7315720B2 (ja) 2023-07-26

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