EP2574463B1 - Machine d'impression à feuilles - Google Patents

Machine d'impression à feuilles Download PDF

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Publication number
EP2574463B1
EP2574463B1 EP12151878.1A EP12151878A EP2574463B1 EP 2574463 B1 EP2574463 B1 EP 2574463B1 EP 12151878 A EP12151878 A EP 12151878A EP 2574463 B1 EP2574463 B1 EP 2574463B1
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EP
European Patent Office
Prior art keywords
sheet
printing
printed
cylinder
free
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
EP12151878.1A
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German (de)
English (en)
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EP2574463A1 (fr
Inventor
Rainer Gebhardt
Sarayut Leeratanaphanit
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.)
Manroland Sheetfed GmbH
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Manroland Sheetfed GmbH
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Publication date
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Application filed by Manroland Sheetfed GmbH filed Critical Manroland Sheetfed GmbH
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Classifications

    • 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
    • B41F21/005—Electrostatic holding down devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F25/00—Devices for pressing sheets or webs against cylinders, e.g. for smoothing purposes
    • 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
    • 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

Definitions

  • the invention relates to a sheet-fed printing machine according to the preamble of claim 1.
  • printing-form-free printing devices which are preferably used to individualize printed products produced by offset printing using, for example, barcodes, numbering or other markings.
  • Such printing formless printing devices are also referred to as non-impact print (NIP) printing devices and can be embodied, for example, as inkjet printing devices which have at least one inkjet print head, wherein the or each inkjet print head according to the so-called continuous inkjet principle,
  • NIP non-impact print
  • the drop-on-demand inkjet principle, the thermal inkjet principle or any other inkjet principle can work.
  • the pressure-formless or NIP printing devices can also be designed as laser printing devices.
  • Printing presses increasingly require the integration of different working steps in one machining operation.
  • new printing processes and various finishing steps of the print material In addition to the classic flat gravure and high-pressure processes, new printing processes and various finishing steps of the print material.
  • the combination of offset printing and flexographic printing is standard, and finishing steps such as cold foil transfer, embossing and stamping components are also partially realized.
  • digital printing processes are increasingly entering the market, which are offered as a stand-alone application.
  • the present invention enables the use of high-quality digital printing systems, in particular for inkjet printing in the environment of a sheet-fed printing machine.
  • the sheet to be printed can have very different mechanical properties, depending on the process conditions (printing speed, color assignment) the usually guided only at the leading edge sheet during transport does not hold on the impression cylinder surface, but take off, flutter or the end of the sheet will whip-like whipping. This leads to a reduction in the print quality with a fluctuating distance between the print head and the surface or disturbances in the printing by striking the freshly printed sheet. It is therefore essential that the sheet is held on the cylinder diameter or at a defined distance from the inkjet system.
  • a sheet-fed printing machine in which a designed as an inkjet printing device or as a laser printing device, pressure-free printing device is integrated in an offset printing unit of the sheet-fed press.
  • the pressure-formless printing device with respect to a sheet-guiding impression cylinder in the area after the passage of sheet is arranged by a pressure gap formed by the impression cylinder and a blanket cylinder.
  • the printing machine according to DE 197 04 003 A1 In particular, the printing of printed sheets with a high rigidity in the area of the inkjet printing device or laser printing device is problematic.
  • Another sheet-fed press with a built-in pressure-free printing device is from the DE 195 14 259 A1 known, the pressure-formless printing device seen in the transport direction of the sheet seen behind the last offset printing unit and in the transport direction of the sheet seen before a boom of the sheet-fed press integrated into the same according to this prior art.
  • the printing formless printing devices can be arranged with a small distance to the sheet without rolling on the sheet to be printed Sheet guide rollers are required, which on the one hand affect the print quality and on the other hand limit the printable in the range of or any pressure-free device width of the sheet.
  • the printing forme printing devices can be arranged with a small distance to the sheet without rolling on the printing side of the sheet Sheet guide rollers are required, which on the one hand affect the print quality and on the other hand limit the printable in the range of or any pressure-free device width of the sheet.
  • a pressure-free printing device is designed to be mobile or displaceable, so that they can be used on the one hand within the same sheet-fed printing machine at different installation positions and on the other hand on different sheet-fed presses.
  • a pressure-formless printing device is therefore, if it should be done with the same at an installation position no printing of the sheet, from this installation position disassembled and therefore displaceable. Cleaning and maintenance work on pressure-free printing devices can be carried out independently of the sheet-fed press.
  • a sheetfed press known.
  • the solution described there relates to a sheet-fed printing press, with a sheet feeder for feeding sheet to be printed in the sheet-fed press, with at least one printing unit and / or a coating unit for printing the sheet with a static, identical for all sheets printed image and further with a boom for discharging the printed sheet from the sheetfed press.
  • a sheet feeder for feeding sheet to be printed in the sheet-fed press
  • at least one printing unit and / or a coating unit for printing the sheet with a static, identical for all sheets printed image and further with a boom for discharging the printed sheet from the sheetfed press.
  • there is at least one integrated pressure-free sheetfed press Printing device for printing the sheet with a particular dynamic and variable print image provided.
  • the or each pressure-formless pressure device is integrated into the sheet-fed printing press in conjunction with guide elements arranged opposite a sheet guiding surface.
  • inkjet print heads are provided as pressure-free printing devices.
  • EP 0 737 572 A1 For example, a method for imprinting bar codes in printed sheets and an apparatus for carrying out the method are described.
  • the sheets are to be treated immediately after printing.
  • the printing takes place on a sheet guide drum, at which the sheet end is held firmly fitting.
  • a number of grippers and a series of suction heads are provided on the sheet guiding drum. This tight-fitting guide the arc can also be done by means of an electrostatic charge to the sheet guiding drum.
  • a sheet-fed printing machine which comprises a feeder, at least one printing unit or coating unit for printing a static, identical for all printing sheet image and a boom.
  • a pressure-free printing device for dynamic, variable images is integrated.
  • the pressure-formless printing devices are provided with respect to a sheet guiding surface arranged guide elements.
  • a sheet-fed printing machine and a method for transporting printed sheets in a sheet-fed printing press are known with a plurality of sheet-guiding cylinders designed either as printing cylinders or as transfer cylinders.
  • the sheet guiding cylinder sheets are transported through the sheet printing machine, wherein relative to the transport direction of the sheet a transfer cylinder positioned upstream of a printing cylinder is associated with a Bogenglätt issued to smooth sheet before or when transferring the same to the impression cylinder.
  • an ionization device is arranged downstream of the sheet smoother in a transfer / transfer area to the impression cylinder to the impression cylinder to the impression cylinder to the impression cylinder.
  • the present invention is based on the problem to provide a novel sheet-fed printing machine.
  • the or each pressure-formless printing device is integrated into the sheet-fed printing press in the area of cylinders guiding sheets.
  • the surface of the serving for the pressure-formless printing device as a counter surface cylinder is formed adhesive to accurately spaced the sheets to be printed and safely lead to the pressure-formless printing devices over.
  • an electrostatic device is mounted in a certain area of the printing press, in the transport direction of the sheet in front of one or all pressure-formless printing devices, by means of which a charge can be introduced into the sheet to be printed so that it adheres to the surface leading him.
  • a blowpipe is preferably provided here on the outlet side of the printing nip.
  • Fig. 1 shows a schematic representation of a sheet-fed printing machine 10, wherein the sheet-fed printing machine 10 comprises a sheet feeder 11, a plurality formed as offset printing units 12, a printing units 12 downstream coating unit 13 and the coating unit 13 downstream boom 14.
  • the sheet feeder 11 is used for feeding sheet to be printed in the sheet-fed press 10, wherein the sheets are moved through the printing units 12 and the coating unit 13 and printed in the same with a print sheet for all the same or unchanging and thus static printed image.
  • printed signatures are discharged from the sheet-fed printing press to form a delivery stack 15.
  • the sheetfed press 10 designed as a so-called turning machine, which serves the two-sided printing of printed sheets in the so-called perfecting.
  • a arranged between the first two printing units 12 transfer cylinder is this formed as a turning cylinder 16.
  • At least one pressure-formless printing device is integrated, which serves to print the printed sheet with a dynamic or variable print image.
  • the or each pressure-formless printing device can be integrated in the sheet feeder 11 in the sheet-fed press 10, wherein in Fig. 1 possible installation positions 17 and 18 are shown schematically for the or each pressure-formless printing device. In both installation positions 17 and 18, the printed sheets are printed in the area of the sheet feeder 11 via the or each pressure-formless printing device from above.
  • the installation position 18 is preferred for each pressure-formless printing device, namely above an investment table 19, via which printed sheets lifted from an feeder stack 20 are fed to the first printing unit 12 of the printing press.
  • the printed sheets are guided on their underside by at least one suction belt, so that the printing sheets of the or each printing forme printing device on an upper side thereof are printable, namely over the entire format width and format length thereof.
  • the sheets are flat or flat. It can be maintained a small distance between the or each pressure-free printing device and the sheet and thus a high print quality can be provided.
  • a pressure-formless printing device is integrated in the installation position 18 above a support table 19 in the sheet feeder 11, the installation position along the support table 19 can be freely selected.
  • the pressure-free printing device then at least a leading edge and a side edge of the sheet must be detected and evaluated to print the sheets in the desired zones of the same.
  • the sensors required to detect the leading edge and side edge may be provided via infrared or ultrasonic sensors or capacitive sensors.
  • the installation position 17 is preferred for the or each pressure-formless printing device, namely above an in Fig. 1 not shown investment sheet of the flaker feeder, wherein the sheet separated in the region of the contact plate and detected by a so-called pre-gripper 21 and the first printing unit 12 of the sheet-fed press 10 are supplied.
  • the printed sheets of the or each printing formless printing device over the entire format width and format length can be printed with a dynamic or variable printed image.
  • a printing formless printing device in the installation position 17 adjacent to the pre-gripper 21 integrated into the sheet feeder 11, so at least one leading edge of the sheet must be detected and evaluated to control the printing formless printing device to the sheets in the desired zones thereof to print.
  • the required for detecting the leading edge sensor can be provided in turn via infrared or ultrasonic sensors or capacitive sensors.
  • a sheet guiding device is preferably positioned which can be displaced into regions or zones of the printed sheets which are not to be printed by the printing-formless printing device.
  • At least one characteristic line is preferably stored in a control device of the printing-formless printing device, which depends on substrate parameters such as the grammage and / or the fiber direction and / or the stiffness of the printed sheet is.
  • the pressure-formless printing device is then controlled based on one of these characteristics.
  • the characteristic curves are determined in advance for printed sheets from different substrates.
  • the or each in the sheet-fed printing machine 10 integrated pressure-free printing device is preferably designed as an inkjet printing device, such printing devices seen transversely to the transport direction of the sheet several juxtaposed inkjet printheads and seen in the transport direction of the sheet several successively arranged inkjet printheads, the array-like or are arranged in a matrix-like manner to one another and are preferably interconnected on the control side.
  • the number of print heads required transversely to the printing direction is primarily defined by the desired total print width relative to the given print width of the print head used.
  • the required number of printheads in the transport direction of the sheet is, however, determined by the fact that the desired printing speed is greater than the given printing speed of a printhead and in that a plurality of inks are to be applied to the sheets by means of pressure-free printing device. Furthermore, the number of print heads in the transport direction of the print sheets is defined by the desired print resolution in relation to the given print resolution of the print head used.
  • the printing units 12 and the coating unit 13 of the sheet-fed printing machine 10 of the embodiment of the invention Fig. 1 printing on the printed sheets with a static, identical for all sheets printed image.
  • the or each integrated in the sheetfed press 10 in the sheet feeder 10 pressure-free device serves to print the sheet with a dynamic or variable print image
  • the printing with the dynamic or variable print image inline for printing the printing sheet is carried out with the static printed image, namely before the printing of the printed sheets in the printing units 12 and the coating unit 13.
  • pressure-free printing devices are provided in mounting positions 30, 31 on impression cylinders 40 in printing units 12.
  • the pressure-formless printing devices are arranged downstream of a printing gap serving as ink transfer on the printing sheet in the sheet running direction.
  • a pressure-formless printing device is also provided for an installation position 32 on a counter-pressure cylinder 40 in a coating unit 13. Furthermore, pressure-formless printing devices in installation positions 33, 34 may be provided on sheet guides 41 in the boom 14, so that they act on the underside of the sheet.
  • the compression-free printing devices are not intended for use in the Fig. 1 shown configuration of a sheet-fed press limited, but they can be used in any sheetfed presses.
  • Fig. 2 an application in a sheet-fed printing machine 22, as viewed in the transport direction of the sheet after the sheet feeder 11 designed as a flexographic printing unit 23 and seen in the transport direction of the sheet before the boom 14 a coating unit 24 is arranged, and wherein between the flexographic printing unit 23 and the coating unit 24th two drying devices 25 are positioned.
  • Fig. 2 is integrated into the sheet-fed press 22 at least one printing forme pressure device in the region of the sheet feeder 11, namely either in the field of installation position 17 or in the field of installation position 18, so that the comments on the embodiment of Fig. 1 can be referenced.
  • the mounting position 17 is preferred in a sheet feeder designed as a sheet feeder and the mounting position 18 in a sheet feeder designed as a sheet feeder.
  • printing formless printing devices can also this sheet-fed printing press 22 in installation positions 32 on impression cylinders 40 in the printing units 23, 24 may be provided which are designed in the manner of flexographic printing units or coating units.
  • pressure-formless printing devices may be provided in an installed position 35 on sheet guides 42 in the boom 14 so that they act on the printed sheets from the top.
  • pressure-formless printing devices can be used in sheet-fed presses, in which the sheet feeder is designed as a roll-sheet feeder.
  • the roll sheet feeder includes a sheet cutter and is also referred to as an inline sheeter.
  • the sheet-cutting device are cut from a web-shaped substrate sheet, which are then fed via an investment table the first printing unit of the following sheet-fed press.
  • the or each pressure-formless printing device is preferably integrated at the installation position in the sheet feeder, where the sheets are guided horizontally over a conveying surface and are largely accessible from above.
  • the or each printing plateless printing device of the sheet printing machine is removable, in such a way that the or each of the formless printing devices can be used on another sheet printing machine 10, 22 or within the same sheet printing machine 10, 22 at different mounting positions.
  • the or each of the pressure-free printing devices each have an interface that is designed for supply, namely mechanical or Druckmaschinee wornem way, and an interface that is used for control, namely in relation to electrical or electronic operations and over the or Each of the pressure-free printing devices to a system for supply Printing colors or can be connected to a control device of the respective printing press.
  • the electrical and mechanical interfaces for these printing devices can be centralized at one point of the sheet-fed printing machine 10, 22.
  • leading supply lines be it electrical supply lines or mechanical or printing ink side supply lines can either be permanently installed on the sheet-fed press according to the invention or mobile to the sheet-fed press 10, 22 are introduced. Due to the disassembly of the or each printing formless printing device of the sheet-fed printing machine according to the invention maintenance and cleaning of the printing formless printing devices outside the range of the sheet-fed press 10, 22 can be performed.
  • the printing formless printing device is preferably arranged downstream of a drying device or curing device and / or a suction device, wherein the drying device serves to dry the printing ink applied via the printing formless printing device and the suction device to remove solvent vapors from the ink applied via the printing plate free printing device.
  • Compression-free printing devices may also be pivotally mounted in the area of the sheet feeder 11 (e.g., mounting position 17 and / or 18), preferably on a pivot arm engaging a side frame of the sheet feeder 11 or the first printing unit. As a result, the sheet feeder 11 is freely accessible for setup work.
  • FIG. 3 illustrated embodiment allows the use of high-quality digital printing systems, in particular by the method of inkjet printing in the technical environment of a sheet-fed press.
  • a printing sheet B in a processing unit 1 on the smooth surface of a impression cylinder 2 resting and transported at its front edge by grippers 3 in the working direction A is transported.
  • a counter-pressure cylinder 2 - see also the arrangements of counter-pressure cylinders 40 in Fig. 1 and 2 - In the treatment plant 1 assigned a pressure device.
  • the pressure device is designed here as a pressure roller 4, but can also be carried out according to the invention, depending on the configuration of the processing plant 1 as a blanket cylinder, blanket cylinder, forme cylinder or pressure roller.
  • the pressure roller 4 forms a pressure nip 5 with the impression cylinder 2, so that there the sheet B of the pressure roller 4 is smoothly placed on the surface of the impression cylinder 2.
  • a blowing tube 6 is arranged on the outlet side of the printing gap 5 located in the working direction A of the machine movement, the blowing air jet of which blows into the printing gap 5. In this way, an evasive movement of the printed sheet B upon exiting the printing nip 5 can be prevented.
  • an ionizer 7 is arranged opposite the surface of the impression cylinder 2.
  • a printed sheet B resting on the counter-pressure cylinder can be charged by means of contact-free charged charged particles, so that it subsequently firmly adheres to the impression cylinder 2 by means of the electrostatic effect.
  • an insulating support sheet 2A can be applied to the impression cylinder.
  • an inkjet print head 8 Downstream of the ionizer 7 in the working direction A, an inkjet print head 8 is arranged, by means of which the print-form-free image parts can be applied to the print sheet B, while the print sheet B is held completely flat against the impression cylinder 2.
  • the inkjet printhead 8 downstream in the direction A of the impression cylinder 2 a de-ionizer 9 is assigned.
  • the electrostatic charge of the sheet is reduced again, so that disturbances in the sheet transport can be minimized.
  • a printed sheet B as used for example in sheetfed offset printing, have very different mechanical properties. It follows that, depending on the prevailing process conditions within the selected printing press depending on the printing speed, the number of process steps, the mechanical properties of the sheet B or the color assignment on the sheet B, this is subject to different stresses. As in Fig. 3 shown, the sheet B is usually guided at its front edge of grippers 3 and can not always be held securely on the surface of the impression cylinder 2 due to the stress during transport. It may come as a result of the stresses that the sheet B lift off, flutter or that he will beat at its end of the sheet.
  • the measures described in the solution according to the invention serve to ensure that the printed sheet B rests on the circumference of the cylinder, for example on the impression cylinder 2 and that it is at a defined distance from an inkjet print head 8 (see also the installation positions 30, 31 and 32 in FIG Figures 1 and 2 ) can be maintained to optimize the printing conditions of the inkjet printhead 8.
  • the surface of a impression cylinder 40 can be equipped with elastic and functional elements that cause adhesion of the sheet on the cylinder surface. Then it is provided that the corresponding printing unit 12, 13, 23, 24 is used only for inkjet printing.
  • electrostatic processes should now also be used for sheet adhesion to the impression cylinder 2.
  • the description refers to a processing plant 1, whose configuration is described above with reference to FIG. 3 was explained.
  • the printed sheet B is electrically charged with respect to its electrically conductive base, which is formed here by a counter-pressure cylinder 2, with a relatively high voltage of up to several 10,000 volts.
  • the charging can be effected without contact by flowing, ie free-flying, electrons which are generated by corona discharge or peak discharge or plasma discharge or other discharge processes.
  • the sheet B can then unload again become.
  • an ionization device is provided as an ionizer 7 associated with the counter-pressure cylinder 2 and, on the other hand, a de-ionizer 9 is arranged opposite the impression cylinder surface.
  • the generation of a holding force between the underside of the paper surface of the printing sheet B and the cylinder surface, ie the outside of the impression cylinder 2, is possible. This ensures that the printed sheet B and in particular the sheet end of the held by the gripper 3 at the leading edge of printed sheet B adhere to the cylinder surface.
  • the targeted charge distribution in the printing material leads to a polarization between the paper surface and the cylinder surface. This results in a clearly detectable attraction between the relatively large surfaces of the two elements sheet B and impression cylinder.
  • the adhesion can be supported because the support film 2A obstructs the flow of electrical charges from the sheet B on the impression cylinder 2.
  • the printing sheet B is quasi ironed in a printing nip 5 between a pressure roller 4 and the impression cylinder 2 by being pressed by a printing operation or the unwinding of a pressure roller formed as a blanket cylinder 4, a wrinkle-free installation of the sheet B on the cylinder surface is possible .
  • a so-called Druckzylinderblasvorraum which is arranged in front of the printing nip 5, can be used to assist.
  • the arrangement of a blower tube 6 between the nip 5 and the ionizer 7 is helpful if it comes to a running, ie adhesion of the sheet to the pressure roller 4 or the blanket cylinder or the forme cylinder.
  • the printed sheet B is removed from the blanket cylinder prior to ionization and ironed onto the impression cylinder 2.
  • a modification of the impression cylinder surface has a supporting effect.
  • a coating or a coated elevator such as in the manner of the above-mentioned support film 2A, can also be used to increase the cylinder diameter.
  • this measure in addition to the obstruction of the charge discharge and the charge distribution is favorably influenced.
  • Such a non-conductive plastic layer supports the polarization and thus also the adhesion of the printing sheet B is reinforced on the impression cylinder 2.
  • a sufficient adhesive effect for the printing process can be achieved even with a reduced impact strength or exposure time by means of the ionizer 8.
  • the device according to the invention for the ionization of printed sheets after a printing nip described here can also be used in conjunction with an sheet inspection device or a color measuring device which is arranged at the location of the inkjet printing head. Then, the same advantageous effect of the adhesion of the sheet end to the cylinder surface of the impression cylinder after exiting the printing nip for the measurement on the surface of the printing sheet occurs.

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  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Claims (9)

  1. Machine d'impression de feuilles (10, 22), comprenant un margeur de feuilles (11), au moins un groupe d'impression (12 ; 23) et/ou groupes de vernissage (13 ; 24) pour l'impression de feuilles d'impression (B) avec une image d'impression statique (B) identique pour toutes les feuilles d'impression, un extracteur (14) et au moins un dispositif d'impression (8, 17, 18 ; 29 ; 31-35) sans cliché d'impression intégré dans la machine d'impression de feuilles (10, 22) pour l'impression des feuilles d'impression (B) avec une image d'impression variable, en particulier dynamique, que le ou chaque dispositif d'impression (8, 17, 18 ; 29-35) sans cliché d'impression est intégré au niveau de cylindres de guidage de feuilles (2, 40) dans la machine d'impression de feuilles et que, au niveau des cylindres de guidage de feuilles (2, 40), des dispositifs de guidage adhérent des feuilles d'impression (B) sont prévus par la génération d'une force de retenue entre le dessous de la surface en papier de la feuille d'impression (B) et la surface du cylindre, donc la face extérieure d'un cylindre de contre-pression (2),
    dans laquelle le cylindre de guidage de feuilles (2, 40) est pourvu d'une surface conductrice d'électricité et un dispositif de chargement pour le chargement électrostatique des feuilles d'impression (B) est associé au cylindre de guidage de feuilles (2, 40),
    de sorte qu'au moins les parties opposées au dispositif d'impression (8, 17, 18 ; 29-35) sans cliché des cylindres de guidage des feuilles d'impression (B) sont attirées par électricité par le cylindre de guidage de feuilles (2, 40),
    caractérisée en ce que le dispositif de chargement se présentant sous forme d'un dispositif d'ionisation (7) est disposé dans le sens de passage des feuilles (A) en aval d'un interstice d'impression (5) constitué par un dispositif de compression qui se présente sous forme d'un rouleau compresseur (4), d'un cylindre porte-blanche, d'un cylindre en caoutchouc, d'un cylindre porte-cliché ou d'un rouleau compresseur et le cylindre des guidages de feuilles (2, 40) et est disposé en amont du dispositif d'impression (8, 30-32) sans cliché à l'opposé de la surface du cylindre de guidage de feuilles (2, 40).
  2. Machine d'impression de feuilles selon la revendication 1, caractérisée en ce que, dans le sens de passage des feuilles (A), en amont du dispositif d'ionisation (7), il est prévu un dispositif de soufflage (6) dont le jet de soufflage (6A) dans l'interstice d'impression (5) est dirigé sur la surface de la feuille d'impression guidée (B).
  3. Machine d'impression de feuilles selon les revendications 1 à 2, caractérisée en ce que, dans le sens de passage des feuilles (A), en aval du dispositif d'ionisation (7) et avant le détachement de la feuille d'impression (B) du cylindre de guidage de feuilles (2, 40), il est prévu un dispositif de déionisation (9) dont l'effet est dirigé sur la surface de la feuille d'impression guidée (B), de sorte que sa force d'adhérence au cylindre de guidage de feuilles (2, 40) est réduite.
  4. Machine d'impression de feuilles selon la revendication 1 à 3, caractérisée en ce que, sur la surface du cylindre de guidage de feuilles (2, 40), il est prévu un film de couverture isolant du point de vue électrique (2A) de manière à ce qu'une évacuation de charge depuis la feuille d'impression chargée (B) sur le cylindre de guidage de feuilles (2, 40) soit réduite et qu'une homogénéisation de la répartition de charge sur la surface de la feuille d'impression (B) soit établie.
  5. Machine d'impression de feuilles selon la revendication 1 à 4, caractérisée en ce que, sur la surface du cylindre de guidage de feuilles (2, 40), il est prévu un film de couverture isolant du point de vue électrique (2A) de manière à ce qu'une évacuation de charge depuis la feuille d'impression chargée (B) sur le cylindre des guidages de feuilles (2, 40) soit réduite.
  6. Machine d'impression de feuilles selon la revendication 5, caractérisée en ce que, sur la surface du cylindre de guidage de feuilles (2, 40), il est prévu un film de couverture isolant du point de vue électrique (2A) de manière à ce que le diamètre du cylindre de guidage de feuilles (2, 40) soit agrandi pour approcher la feuille d'impression (B) vers le dispositif d'impression (8, 30-32) sans cliché.
  7. Machine d'impression de feuilles selon la revendication 1 à 5, caractérisée en ce que, dans un dispositif de commande du dispositif d'impression (8 ; 17, 18 ; 29-35) sans cliché d'impression, est enregistrée au moins une caractéristique qui est fonction de paramètres du support d'impression comme le grammage et/ou le sens des fibres et/ou la rigidité des feuilles d'impression (B), le dispositif d'impression (8 ; 17, 18 ; 29-35) sans cliché d'impression étant contrôlable à partir de ces caractéristiques.
  8. Machine d'impression de feuilles selon une ou plusieurs des revendications 1 à 6, caractérisée en ce que le ou chaque dispositif d'impression (8 ; 17, 18 ; 29-35) sans cliché d'impression se présente sous forme d'un dispositif d'impression à jet d'encre, les feuilles d'impression (B) pouvant être imprimées sur toute la largeur du format et/ou la longueur du format du ou de chaque dispositif d'impression (8 ; 17, 18 ; 29-35) sans cliché d'impression.
  9. Machine d'impression de feuilles selon la revendication 7, caractérisée en ce que le ou chaque dispositif d'impression (8 ; 17, 18 ; 29-35) sans cliché d'impression présente, vu transversalement au sens de passage des feuilles (A), plusieurs têtes d'impression à jet d'encre juxtaposées et/ou, vu dans le sens de passage des feuilles (A), plusieurs têtes d'impression à jet d'encre successives qui sont branchées entre elles au niveau commande.
EP12151878.1A 2011-02-08 2012-01-20 Machine d'impression à feuilles Active EP2574463B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011003804 2011-02-08
DE201210200650 DE102012200650A1 (de) 2011-02-08 2012-01-18 Bogendruckmaschine

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EP2574463B1 true EP2574463B1 (fr) 2018-04-04

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Cited By (2)

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DE102018125033A1 (de) * 2018-10-10 2020-04-16 Koenig & Bauer Ag Vorrichtung, Verfahren und Druckmaschine zum mehrfachen Bedrucken von Bedruckstoffbogen
WO2020200703A1 (fr) 2019-04-03 2020-10-08 Koenig & Bauer Ag Machine à imprimer et procédé de fabrication de produits imprimés

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DE102014011411B4 (de) 2014-07-31 2022-06-23 Heidelberger Druckmaschinen Ag Bogentransportvorrichtung
DE102015111525A1 (de) * 2014-08-08 2016-02-11 manroland sheetfed GmbH Modulare Inkjet-Druckeinrichtung
EP3253574B1 (fr) 2015-04-30 2018-09-26 Koenig & Bauer AG Procédé et systèmes de machines à imprimer pour traiter en séquence substrats en forme de feuille
DE102016207398B3 (de) * 2015-09-09 2016-08-18 Koenig & Bauer Ag Maschinenanordnung zum sequentiellen Bearbeiten mehrerer bogenförmiger jeweils eine Vorderseite und eine Rückseite aufweisender Substrate
CN106827831A (zh) * 2017-02-27 2017-06-13 天津长荣数码科技有限公司 一种单张纸喷码印刷机
JP2021009226A (ja) 2019-07-01 2021-01-28 ヒューレット−パッカード デベロップメント カンパニー エル．ピー．Ｈｅｗｌｅｔｔ‐Ｐａｃｋａｒｄ Ｄｅｖｅｌｏｐｍｅｎｔ Ｃｏｍｐａｎｙ， Ｌ．Ｐ． 選択的に制御されるイオナイザを備えた画像形成システム
CN114132070A (zh) * 2021-11-30 2022-03-04 赣州惠彩印刷有限公司 一种环保印刷装置

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US3174748A (en) 1963-06-17 1965-03-23 Harris Intertype Corp Electrostatic sheet hold-down
DE1286051B (de) 1965-03-29 1969-01-02 Harris Intertype Corp Einrichtung zum Fuehren eines Blattes an einem Zylinder insbesondere einer Rotationsdruckmaschine
DE19514259A1 (de) 1995-04-15 1996-10-17 Roland Man Druckmasch Verfahren zum Eindrucken von Strichcodes in Druckbogen und Vorrichtung zur Durchführung des Verfahrens
DE19704003A1 (de) 1997-02-04 1998-08-06 Kba Planeta Ag Verfahren und Vorrichtung zum Eindrucken von individualisierenden Kennzeichnungen
EP1303406B1 (fr) 2000-07-12 2008-10-15 manroland AG Dispositif de guidage de feuilles
US20090284561A1 (en) 2008-05-13 2009-11-19 Takashi Fukui Image forming apparatus and maintenance method

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DE102006002302A1 (de) 2006-01-18 2007-07-19 Man Roland Druckmaschinen Ag Bogendruckmaschine
DE102006002312B4 (de) 2006-01-18 2023-11-16 manroland sheetfed GmbH Bogendruckmaschine
DE102006002304A1 (de) 2006-01-18 2007-07-19 Man Roland Druckmaschinen Ag Bogendruckmaschine
DE102009000521A1 (de) 2009-01-30 2010-08-05 Manroland Ag Bogendruckmaschine

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US3174748A (en) 1963-06-17 1965-03-23 Harris Intertype Corp Electrostatic sheet hold-down
DE1286051B (de) 1965-03-29 1969-01-02 Harris Intertype Corp Einrichtung zum Fuehren eines Blattes an einem Zylinder insbesondere einer Rotationsdruckmaschine
DE19514259A1 (de) 1995-04-15 1996-10-17 Roland Man Druckmasch Verfahren zum Eindrucken von Strichcodes in Druckbogen und Vorrichtung zur Durchführung des Verfahrens
DE19704003A1 (de) 1997-02-04 1998-08-06 Kba Planeta Ag Verfahren und Vorrichtung zum Eindrucken von individualisierenden Kennzeichnungen
EP1303406B1 (fr) 2000-07-12 2008-10-15 manroland AG Dispositif de guidage de feuilles
US20090284561A1 (en) 2008-05-13 2009-11-19 Takashi Fukui Image forming apparatus and maintenance method

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Publication number Priority date Publication date Assignee Title
DE102018125033A1 (de) * 2018-10-10 2020-04-16 Koenig & Bauer Ag Vorrichtung, Verfahren und Druckmaschine zum mehrfachen Bedrucken von Bedruckstoffbogen
US11207880B2 (en) 2018-10-10 2021-12-28 Koenig & Bauer Ag Device, method and printing press for multiple printing of printing substrate sheets
WO2020200703A1 (fr) 2019-04-03 2020-10-08 Koenig & Bauer Ag Machine à imprimer et procédé de fabrication de produits imprimés
DE102019108765A1 (de) * 2019-04-03 2020-10-08 Koenig & Bauer Ag Druckmaschine und Verfahren zur Herstellung von Druckprodukten
US11214053B2 (en) 2019-04-03 2022-01-04 Koenig & Bauer Ag Printing press and method for producing printed products

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DE102012200650A1 (de) 2012-08-09

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