EP3532297B1 - Dispositif et procédé pour imprimer un substrat en forme de feuille - Google Patents

Dispositif et procédé pour imprimer un substrat en forme de feuille Download PDF

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Publication number
EP3532297B1
EP3532297B1 EP17788237.0A EP17788237A EP3532297B1 EP 3532297 B1 EP3532297 B1 EP 3532297B1 EP 17788237 A EP17788237 A EP 17788237A EP 3532297 B1 EP3532297 B1 EP 3532297B1
Authority
EP
European Patent Office
Prior art keywords
substrate
deflection roller
section
roller
additional
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
EP17788237.0A
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German (de)
English (en)
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EP3532297A1 (fr
Inventor
Hans-Peter Seijo-Bollin
James Zerbel
Arthur Mathea
Marko Breternitz
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.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei GmbH
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Publication date
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Publication of EP3532297A1 publication Critical patent/EP3532297A1/fr
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Publication of EP3532297B1 publication Critical patent/EP3532297B1/fr
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Classifications

    • 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
    • B41J13/226—Clamps or grippers on rotatable drums using suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F11/00—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination
    • B41F11/02—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination for securities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B41F13/025—Registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/28—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing downwardly on flat surfaces, e.g. of books, drawings, boxes, envelopes, e.g. flat-bed ink-jet printers
    • B41J3/283—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing downwardly on flat surfaces, e.g. of books, drawings, boxes, envelopes, e.g. flat-bed ink-jet printers on bank books or the like
    • 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
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J2025/008—Actions or mechanisms not otherwise provided for comprising a plurality of print heads placed around a drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing

Definitions

  • the invention relates to an apparatus and a method for printing on a sheet-like substrate.
  • both sides of a substrate are printed on.
  • a substrate is generally transported completely into a printing area of a printing device.
  • a first top side is then printed by moving at least one print head over the flat substrate.
  • the substrate is transported out of the printing area, turned and transported back into the printing area, in order to then print the further top side.
  • the technical problem arises of creating a device and a method for printing a sheet-like substrate which enable the sheet-like substrate to be printed quickly, in particular on both sides, while minimizing the installation space required for the device.
  • the DE 10 2016 207 398 B3 discloses a machine arrangement for sequentially processing a plurality of arcuate substrates each having a front side and a rear side.
  • the EP 3 016 365 A1 discloses an imaging device.
  • the EP 2 657 035 A1 discloses a digital printing device which prints on a sheet in an inkjet process.
  • the DE 20 2013 102 257 U1 discloses a device for printing printed sheets by means of an inkjet print head in a sheet-fed printing machine, with at least one printing unit and / or coating unit, one or more inkjet printing heads each being assigned to a cylinder that guides the sheet.
  • the EP 1 041 806 A2 discloses a printer with an image scanner, particularly a printer for printing and processing checks.
  • the US 2010/060693 A1 discloses a printer having a print head and a first rotatable body and an attachment mechanism for attaching a print medium to the first rotatable body.
  • the WO99 / 11551 A1 discloses arrangements of vacuum drums for printing machines.
  • the DE 197 45 136 A1 discloses a rotary printing press for printing on sheets or webs.
  • JP 2008 100458 A discloses an ink jet printer which can reverse a printing medium at high speed and smoothly.
  • JP 2012 196832 A discloses an image recording apparatus for recording a high resolution image by holding a recording medium in consideration of paper stretch due to ink.
  • the JP 2010 179583 A discloses a printhead positioning device.
  • EP 1 607 234 A1 discloses a method and apparatus intended to provide variable data to security documents, each
  • Security document receives an individualized identity marking, which offers improved security against copies or forgery.
  • the EP 2 067 628 A1 discloses a device for double-sided printing.
  • the GB 2,455,923 A discloses a double-sided imaging apparatus for forming an image on a first side of a sheet of paper and then reversing the sheet of paper and re-feeding the sheet of paper to an imaging section.
  • the present invention achieves this object by a device having the features of claim 1 and by a method having the features of claim 7.
  • a device for printing is proposed, the proposed device being suitable for printing on a sheet-shaped substrate.
  • the substrate is in particular flexible so that it can be guided on a curved path, in particular on a circular path.
  • the substrate can be a sheet of paper, e.g. made of natural or synthetic paper, and in particular a plastic sheet, an already printed substrate or a metal-plastic composite, e.g. a flexible aluminum-plastic composite panel.
  • the substrate can have a width from a range from 120 mm to 1200 mm, a length from a range from 300 mm to 1200 mm and a thickness from a range from 40 ⁇ m to 300 ⁇ m.
  • the length can be measured in the direction of transport and the width across the direction of transport.
  • the substrate preferably comprises one or more strips, each with a plurality of panels. These panels can be separated from the substrate after printing and, if necessary, after further process steps, e.g. by punching. However, it is also possible for the substrate to form a single panel.
  • the substrate can, for example, be made of several layers which have been combined to form a layer composite to form the substrate, for example by lamination.
  • a layer can be designed as a plastic film, for example.
  • the substrate itself or one of the layers can previously be provided with at least one position mark and / or a background image, for example by means of a print. This can be done, for example, by offset printing.
  • a print for example, by offset printing.
  • the device itself can preferably an inkjet process can be used for printing. However, other digital printing methods can also be used.
  • the device can thus be an inkjet device or a digital printing device.
  • the device comprises at least one printing module.
  • a print module can preferably comprise a print head or a plurality of print heads.
  • the print module can also be a print head array or a nozzle bar, among other things. These arrays or nozzle bars can be used, for example, in printing processes with a continuous feed rate of the substrate.
  • a printing module can also comprise a carriage on which one or more print heads are arranged.
  • the device also has at least one first deflection roller for transporting the substrate.
  • the first deflection roller is used to convey the substrate during, before and / or after printing.
  • the first deflection roller can enable a change in the orientation of the substrate or a change in direction of the transport direction of the substrate during transport.
  • the substrate can preferably be guided on or along a circular path or a circular segment path by means of the deflection roller.
  • the device comprises at least one feed device, wherein the substrate can be fed to the first deflecting roller by means of the feed device.
  • the feed device can be an active or a passive feed device.
  • it can be an infeed table which has a suction device for suctioning the substrate.
  • the feed device can also be designed, for example, as a conveyor belt
  • the at least one printing module is arranged in such a way that a first side of the substrate, in particular its front or top side, can be printed in at least one section of the substrate.
  • This portion can be, for example, a portion of the substrate formed by a panel.
  • the printing module or the printing modules are preferably arranged along a vertical direction above the first deflecting roller or a further deflecting roller of the device.
  • a lateral direction can be perpendicular to the vertical direction and perpendicular to the The axis of rotation of the first and / or a further deflection roller can be oriented.
  • a longitudinal axis or direction can be oriented parallel to the axis of rotation of the first and / or a further deflection roller.
  • the vertical direction, the lateral direction and the longitudinal direction denote spatial directions.
  • the aforementioned section rests, for example with the back or underside, on the first deflecting roller, in particular an outer circumferential surface of the deflecting roller, during printing, or is arranged in a feed section of the first deflecting roller.
  • the vertical direction can denote a spatial direction which is oriented orthogonally to a storage surface of the device and / or parallel and opposite to the direction of a gravitational force.
  • the substrate By means of the first deflection roller, the substrate can be guided along a circular segment path, the circle segment lying between the contact point of the deflection roller with the substrate and an output point of the first deflection roller, e.g. on a further transport device, e.g. on a discharge table or on a further deflection roller.
  • a central angle of such a circle segment can be in a range of preferably between 1.6 to 4.9 rad and particularly preferably between 2.0 to 4.3 rad and very particularly preferably between 3.3 to 4.1 rad.
  • the feed can preferably take place in such a way that a section of the substrate has an uncurved, flat surface before contact with the first deflecting roller.
  • a section of the substrate which lies against the first deflection roller has a curved surface.
  • the substrate can be transported along the feed direction by means of the first deflection roller.
  • the at least one printing module can thus be arranged in such a way that the first side of the substrate can be printed on in a section of the substrate which rests against the first deflection roller and thus has a curved surface.
  • the print module comprises at least one inkjet print head
  • the print module can be arranged in such a way that an application direction of ink droplets is oriented from the print head to the center of the circle segment path.
  • the application direction is preferably oriented in the direction of a gravitational force or has at least a portion oriented in the direction of the gravitational force. However, this is not mandatory.
  • the device further comprises at least one control and evaluation device.
  • a spatial position of the substrate can be determined by means of the control and evaluation device, in particular before or during the feed to the first deflecting roller.
  • a positioning device, in particular for the printing module can be controlled as a function of the spatial position. Furthermore, the positioning device for the printing module can be controlled in such a way that the desired areas of the substrate can be printed through it. This minimizes the risk of misprints.
  • a spatial position here denotes a spatial position and / or a spatial orientation of the substrate, in particular in a reference coordinate system.
  • the reference coordinate system can, for example, comprise a z-axis as axes which is oriented parallel to the explained vertical direction and opposite to an acting weight force.
  • the reference coordinate system can furthermore comprise a y-axis which is oriented parallel to the explained lateral direction.
  • the reference coordinate system can furthermore comprise an x-axis which is oriented parallel to the explained longitudinal direction.
  • the control and evaluation device can in particular be designed as a microcontroller or comprise such a microcontroller.
  • the control and evaluation device can evaluate output signals from at least one sensor, the sensor generating output signals which enable the spatial position to be determined.
  • the device can include at least one such sensor.
  • a sensor can be designed as an image acquisition device.
  • a sensor that is not an image capturing device can also be used.
  • the device can furthermore comprise at least one positioning device.
  • the at least one positioning device and the at least one printing module can be connected to one another, in particular mechanically, in such a way that the spatial position of the printing module can be changed, in particular adjusted to a desired spatial position, by the positioning device.
  • the spatial position of several, in particular all, print modules can be changed by a single positioning device being.
  • the device can comprise a plurality of positioning devices, in particular one positioning device per printing module, the spatial position of a printing module being able to be changed by a positioning device.
  • a positioning device can comprise a movable part.
  • a translational movement and / or a rotational movement of at least one printing module can be carried out by means of the positioning device.
  • a translational movement can be carried out along exactly one or along several, in particular along two or three, spatial direction (s). If a translational movement can be carried out along several spatial directions, then these can be oriented perpendicular to one another.
  • a positioning device can, for example, comprise a device for generating drive energy.
  • a positioning device can be designed as a linear drive device.
  • control and evaluation device can control the positioning device in such a way that the spatial position of the printing module is set to a desired spatial position.
  • the desired spatial position can in particular be determined in such a way that one or more desired area (s) of the substrate can be printed by the printing module.
  • the control and evaluation device can generate corresponding output signals for the at least one positioning device.
  • control and evaluation device and the at least one positioning device can be connected in terms of signals and / or data.
  • the at least one sensor explained above can also be connected to the control and evaluation device in terms of signals and / or data.
  • the device further comprises at least one first cover device for closing holes of the first deflecting roller, which holes are arranged in a section of the surface.
  • This first covering device can advantageously be used to generate a dead zone in the area of the surface of the first deflecting roller.
  • the device comprises a further cover device for closing holes of the further deflection roller, which in a section of the Surface are arranged.
  • This further covering device can advantageously be used to generate a further dead zone in the area of the surface of the further deflecting roller.
  • the cover devices are each arranged in a stationary manner relative to the axes of rotation.
  • the suction and dead areas of a deflecting roller can be specified by the arrangement and / or design of the covering devices.
  • the cover device can for example be designed as a curved plate and be arranged in the inner volume of a hollow cylindrical deflecting roller.
  • the first and / or second cover device can be arranged in a stationary manner relative to the axis of rotation of the respective deflecting roller. In this case, the cover device covers holes in various sections of the deflection roller during the rotation of the respective deflection roller, whereby the provision of a negative pressure through these holes is interrupted.
  • the substrate can be fixed in a contact point on the surface of the first deflecting roller, the fixing in the dispensing point being releasable, the fixed substrate being transported or conveyed between the contact point and the dispensing point by the first deflecting roller along a segment of a circle path.
  • the contact point and the output point of the first deflecting roller are arranged in a stationary manner relative to an axis of rotation of the first deflecting roller. This can mean that the points in a global reference coordinate system, relative to which the first deflection roller rotates, are arranged in a stationary manner.
  • the substrate can thus advantageously be fixed on the surface of the first deflection roller for pressure and to protect against slipping, in particular in such a way that the deflection roller deflects the arcuate substrate onto a circular path, in particular for turning or inverting the substrate.
  • the device comprises at least one device for drying a printing material, the device for drying being arranged behind the at least one printing module in the transport direction or advance direction of the substrate.
  • the device comprises at least one positioning device for the at least one printing module, wherein the printing module can be moved transversely to the feed direction of the substrate by means of the positioning device.
  • a print head of the print module can thus also be moved transversely to the transport direction.
  • the device comprises at least one further deflecting roller, wherein the substrate can be transported from the first deflecting roller to the further deflecting roller.
  • the substrate can be transported by the first deflecting roller from a contact point of the substrate with the first deflecting roller to a first transfer point along a first circular path segment, the substrate being in contact with the further deflecting roller at the first transfer point.
  • the substrate can be transported by the further deflecting roller from the contact point of the substrate with the further deflecting roller to a further output point along a further circular path segment.
  • the further deflection roller can advantageously enable an optimal feeding of the substrate to a further print head.
  • the first and further deflecting rollers are preferably rotatable in opposite directions and transfer the substrate at a transfer point and / or transfer section.
  • An axis of rotation of the further deflecting roller can be arranged in the vertical direction below or above the axis of rotation of the first deflecting roller. Furthermore, the axis of rotation of the further deflecting roller can be oriented along the lateral direction offset to the axis of rotation of the first deflecting roller.
  • the first and the further deflection roller can touch in at least the transfer point or section.
  • a minimum distance between the deflection rollers, in particular at the transfer point can correspond to the substrate thickness.
  • the substrate thickness is the thickness of the substrate, e.g. the paper thickness of a sheet of paper.
  • the substrate can be fixable in the contact point with the further deflecting roller on the surface of the further deflecting roller, the fixing in an output point being releasable, the fixed substrate being transported between the contact point and the further output point by the further deflecting roller along the further circular segment path .
  • This contact point and the further output point can also be arranged in a stationary manner relative to the axis of rotation of the further deflection roller.
  • the contact point and the further starting point can also be arranged so as to be movable relative to the axis of rotation of the further deflecting roller, wherein a maximum movement distance can correspond to a thickness of the substrate.
  • the device comprises at least one further printing module which is arranged in such a way that a further side of the substrate, in particular its rear or underside, can be printed in a section of the substrate, the section, in particular a front side of the section, on the second deflection roller rests or is arranged in an output section.
  • the output section can designate a spatial region which is arranged above or below the first deflecting roller, extending along the lateral direction from an edge of the first deflecting roller to an edge of the second deflecting roller and extends along a longitudinal direction parallel to the axis of rotation of the second turning roller.
  • the at least one further printing module can thus be arranged in such a way that the further side of the substrate can be printed on in a section of the substrate which rests against the further deflecting roller and thus has a curved surface.
  • the further print module can be arranged in such a way that an application direction of ink droplets is oriented from the print head to the center of the circle segment path, along which the substrate is conveyed by means of the further deflecting roller.
  • This application direction is also preferably oriented in the direction of a gravitational force or has at least a portion oriented in the direction of the gravitational force. However, this is not mandatory.
  • double-sided printing is already made possible in an advantageous manner by the device described above.
  • the printing of the back of the substrate can be done by a further printing device, but it is more economical and more compact if the two-sided printing takes place in the device according to the invention.
  • first and / or further deflection roller and / or the feed device can be controlled by the control and evaluation device as a function of the spatial position.
  • a movement of the deflection rollers and the feed device can be controlled in such a way that different sections of the substrate are conveyed at the same conveying speed. This reduces the risk of damage to the substrate.
  • the device comprises at least one image capturing device, the image capturing device being arranged in such a way that at least a partial area of the first page can be mapped by the image capturing device.
  • the image acquisition device can be connected to the control and evaluation device in terms of signals and / or data.
  • an image-based determination of the spatial position by the control and evaluation device can take place as a function of the image data generated by the image acquisition device.
  • a position mark of the substrate can be detected in an image-based manner and a spatial position of the position mark can be determined in a reference coordinate system.
  • the spatial position of the position mark relative to the substrate can be known in advance. A spatial position of the substrate can then be determined as a function of the spatial position of the position marker. This advantageously enables a reliable and precise determination of the spatial position.
  • the device further comprises at least one fastening means for fastening the substrate to at least a section of a surface of the first and / or at least one fastening means for fastening the substrate to at least a section of a surface of the second deflecting roller.
  • This subsection can also be referred to as a fastening section.
  • This can be, for example, a mechanical means such as a counter-pressure roller or a clamp. As a result, the substrate is fixed on the surface of the respective deflection roller.
  • the fastening means can be arranged and / or designed in such a way that the substrate is fastened to the respective deflection roller only in a section of the surface, while the substrate is not fastened to the surface in the remaining section.
  • This remaining section can also be called the dead zone, since the deflection roller cannot be covered with substrate on this section.
  • the substrate can be attached to different sections of the surface in each rotational state.
  • the fastening section and the dead zone can be arranged in a stationary manner relative to the axis of rotation, while the surface of the deflecting roller rotates.
  • the substrate cannot be fixed to a further section of the surface of the first and / or to a further section of the surface of the further deflecting roller.
  • the device further comprises at least one device for generating a negative pressure in the at least one section of the surface of the first and / or at least one device for generating a negative pressure in the at least one section of the surface of the second deflecting roller.
  • the The device can be arranged and / or designed in such a way that the substrate is sucked into the surface of the corresponding deflecting roller by the negative pressure generated. This possibility of fixing is very gentle on the material. Kinks are advantageously avoided and superficial soiling of the substrate can be suctioned off.
  • a deflection roller can be designed as a hollow cylinder.
  • the surface of the first and / or the surface of the second deflection roller has an adhesive layer and / or a rubber coating.
  • the adhesive layer and / or the rubber coating are used to fasten the substrate and to reliably transmit drive forces.
  • the adhesive layer can be designed in such a way that the adhesive material or the rubber coating seeped into the material of the deflection roller and was then cured. The adhesive layer thus always remains on the deflection roller and is not transferred to the substrate.
  • the adhesive force of such a layer can be adjusted in different ways, e.g. by adding additives. It should be set in such a way that the substrate can adhere, but that it can also be separated again with little force.
  • the device can further comprise at least one device for setting a roller temperature of one or both deflection roller (s), in particular a temperature of an outer lateral surface / surface.
  • a device can comprise, for example, a device for generating thermal energy and possibly a device for transmitting thermal energy.
  • a roller temperature in particular the temperature of the outer jacket surface / surface of the roller, can be set to a desired temperature, in particular to a temperature different from room temperature. In this way, drying of an application medium, in particular ink, on the substrate, which is guided through the corresponding deflecting roller, can be brought about or supported.
  • the device can further comprise at least one device for setting a temperature of a fastening means for fastening the substrate to the surface of a deflection roller.
  • a device can for example also comprise a device for generating thermal energy and possibly a device for transmitting thermal energy.
  • a temperature of a fastening means in particular a substrate contact section of the fastening means, can be set to a desired temperature, in particular to a temperature different from room temperature. This allows drying of an application medium, in particular ink, on the substrate, which is attached to the substrate by the fastening means Surface of the deflection roller is attached, effected or supported.
  • a method for printing a sheet-like substrate is also proposed, the substrate being fed to a first deflecting roller, a first side of the substrate being printed in a section of the substrate, the section resting against the first deflecting roller or in a feed section assigned to the first deflecting roller is arranged.
  • the method can be carried out by means of a device according to one of the embodiments described in this disclosure.
  • the device is thus also designed in such a way that a method according to one of the embodiments described in this disclosure can be carried out by means of the device.
  • a spatial position of the substrate is determined, a positioning device for the at least one printing module being controlled as a function of the spatial position.
  • an image-based determination of the spatial position can take place, further in particular as a function of image data.
  • a further side of the substrate is printed in a section of the substrate, the section resting against a further deflection roller or being arranged in an output section of the device.
  • This output section can be arranged in the vertical direction below the first deflecting roller or above the first deflecting roller.
  • the substrate is transported by means of the first deflection roller along a segment of a circle path, the portion of the substrate lying against the first deflection roller along the segment path being fastened to a surface of the first deflection roller.
  • the substrate can be fastened to the surface of the deflection roller, the fastening being released at the end of the circular segment path.
  • the beginning can be given, for example, by the contact point of the substrate with the first deflection roller.
  • the end can be given, for example, by the output point of the first deflection roller.
  • the section of the substrate is transported along a further circular segment path by means of a further deflecting roller, the section of the substrate lying against the further deflecting roller along the further circular segment path being fastened to the surface of the further deflecting roller.
  • An embodiment is further described in which a negative pressure is generated in at least a partial section of the surface of the first deflecting roller and / or in at least a partial section of the surface of the further deflecting roller. As a result, the substrate can be sucked in accordingly and thus attached to the surface.
  • Fig. 1 an embodiment variant of a device 1 according to the invention is shown as an inkjet printing device.
  • the solution according to the invention can also be applied to other printing devices.
  • a so-called panel can be printed on a substrate 2 by means of the device 1.
  • a substrate 2 can be a sheet of paper, e.g. made of natural or synthetic paper, and in particular a plastic sheet, an already printed substrate or a metal-plastic composite, e.g. an aluminum-plastic composite panel.
  • the substrate 2 can be a pliable, pliable and / or flexible substrate 2.
  • the substrate 2 can have a thickness in the range from 40 ⁇ m to 300 ⁇ m.
  • the printing device in Fig. 1 comprises as a feed device an infeed table 15 for depositing a substrate 2.
  • This substrate 2 is first fed in a feed direction R along a straight path to a first deflecting roller 6 and guided through this on a first curved circular path segment.
  • a transfer point 16 there is a deflection with a change of direction, the substrate 2 being fed to a second deflecting roller 11 at the transfer point 16 and being guided by this on a second curved circular path segment.
  • the substrate 2 is guided from the second circular path segment onto an execution device designed as a discharge table 14, on which the substrate 2 is then guided along a straight path.
  • the device comprises the first deflecting roller 6 and the second deflecting roller 11.
  • the deflecting rollers 6, 11 can preferably have a cylindrical jacket surface. These deflection rollers 6, 11 serve to turn over and / or turn inside out the substrate 2.
  • the terms turning over, turning over and turning over are known from printing technology. Both the turning over and the turning inside out lead to the substrate 2 being turned over, so that both the front side and the rear side of the substrate 2 can be printed with the same application direction.
  • the direction of application is determined by the positioning of the respective print modules of a corresponding device.
  • the run-out table 14 can be designed to be flat at least in a partial area and defines an run-out plane which can be oriented orthogonally to a vertical direction z.
  • the device 1 according to the invention takes place.
  • the exit level in turn defines an output section.
  • the outlet plane can be arranged at different heights along the vertical direction.
  • the outlet plane can also be arranged below the first deflecting roller 6 in the vertical direction.
  • the output section can designate a spatial area which is arranged below the first deflecting roller 6, extending along the lateral direction from an edge of the first deflecting roller 6 to an edge of the second deflecting roller 11 and along a longitudinal direction parallel to the axis of rotation of the second Deflection roller 11 extends.
  • the feed section can denote a spatial region which is arranged above the second deflecting roller 11, extends along the lateral direction from an edge of the first deflecting roller 6 to an edge of the second deflecting roller 11 and along a longitudinal direction parallel to the axis of rotation of the first deflecting roller 11 .
  • the output section can also be arranged above the first deflecting roller 6 in the vertical direction.
  • the output section can denote a spatial region which is arranged above the first deflecting roller 6, extending along the lateral direction from an edge of the first deflecting roller 6 to an edge of the second deflecting roller 11 and along a longitudinal direction parallel to the axis of rotation of the second Deflection roller 11 extends.
  • the feed section can denote a spatial region which is arranged below the second deflecting roller 6, extends along the lateral direction from an edge of the first deflecting roller 6 to an edge of the second deflecting roller 11 and along a longitudinal direction parallel to the axis of rotation of the first deflecting roller 11 .
  • this outlet plane is arranged below the first deflecting roller 6.
  • the substrate 2 can, for example, be guided around the second deflecting roller 11 approximately in a semicircle.
  • the present device of the Fig. 1 has a total of four printing modules 3, 4, 5, 10.
  • the term print module in the context of the present invention includes besides
  • Individual printheads including printhead arrays, linearly or diagonally offset, with several individual printheads and / or nozzle bars.
  • Individual print modules or a plurality of print modules 3-5, 10 can be arranged as one or more print heads on a carriage which is preferably movable above the front side of the substrate 2 and perpendicular to the direction of advance R.
  • the print heads can also be stationary. This is particularly advantageous for printing with a continuous feed.
  • a multicolor print can be applied to the substrate 2 by means of the printing modules 3-5.
  • At least one application medium preferably ink, including UV ink, primer, varnish, including UV varnish, or the like, can be applied to the substrate 2 by the printing modules 3-5, 10.
  • the printing module has corresponding storage spaces in CMYK colors and / or RGB colors.
  • a UV ink or a UV varnish can be an ink or varnish that cross-links by UV radiation.
  • Inks and / or lacquers can also be oxidatively drying inks. These can include, for example, water, organic solvents or oils as solvents.
  • An infeed table plane or a substrate plane of the substrate 2 is defined by the infeed table 15 and / or the substrate 2 before it is deflected onto the first circular path.
  • the printing modules 3-5 are preferably arranged in such a way that one or more application media are dispensed perpendicular to the substrate plane or to the infeed table plane.
  • one or more application media to be applied to the substrate 2 in an area in which the substrate 2 has already been deflected onto the circular arc. This enables a more individual arrangement of the printing modules 3-5, 10 within the device 1.
  • Drying takes place along the feed direction R behind the printing modules 3, 4, 5.
  • a first drying device 9 is arranged in the feed direction R after the printing modules 3-5.
  • An operating principle of the drying device 9 can be selected depending on the application medium used.
  • the drying device 9 can be designed, for example, as an air drying device. Drying can be carried out with warm air in a temperature range from 30 ° C to 80 ° C, preferably in a temperature range from 30 ° C to 55 ° C.
  • temperatures of the deflecting rollers 6, 11 and / or a counter roller 7 can be set in a range from 30.degree. C. to 80.degree.
  • the drying device can also be designed as a UV illumination source, e.g. as a UV lamp or as a UV LED.
  • a drying device 9 can bring about UV crosslinking of a UV ink or a UV lacquer.
  • the substrate 2 is deflected onto the first circular path segment.
  • a central angle of this first circular path segment from a contact point 17 of the substrate 2 with the first deflecting roller 6 to the transfer point 16 to the second deflecting roller 11 is preferably between 1.6 to 4.9 rad and particularly preferably between 2.0 to 4.3 rad and completely particularly preferably between 3.3 to 4.1 rad.
  • the substrate 2 is in contact with the surface of the first deflecting roller 6 and mechanically fastened to it. By rotating the first deflecting roller 6, the substrate 2 is conveyed along the first circular path segment.
  • a central angle of this second circular path segment from the transfer point 16, which can designate a contact point of the substrate 2 with the second deflecting roller 6, to an exit point 18, at which the substrate 2 is transferred to a preferably flat exit table 14, is preferably between 0.3 - 2.6 rad, and more preferably between 0.5 and 2.0 rad.
  • the central angle of the second circular path segment can be selected as a function of an available installation space and / or the installation space requirement of the printing modules and / or a desired discharge direction.
  • the desired discharge direction can be selected depending on a desired removal direction.
  • the substrate 2 is in contact with the surface of the second deflecting roller 11 and mechanically on it attached. By rotating the second deflection roller 11, the substrate 2 is conveyed along the second circular path segment.
  • the substrate 2 For conveying and deflecting the substrate 2 along the first and / or second circular path, the substrate 2 needs to be fixed at least in some areas on the surface of the first and / or the second deflecting roller 6, 11.
  • this fixation is achieved by two different means, whereby one of the means can allow sufficient fixation.
  • the substrate 2 is guided by one or more counter roller (s) 7 on the circular path segment defined by the first deflecting roller 6.
  • Fig. 1 only one counter roller 7 is shown.
  • a roller guide can also be selected for guiding the substrate along the second deflecting roller 11. This can take place in particular when the printing of the second side or the rear side of the substrate 2 only takes place in the area of the discharge table 14, so that the counter rollers of the roller guide do not get dirty.
  • the counter-roller 7 serves only for additional guidance of the substrate 2.
  • the counter-roller can preferably be arranged at a distance between 50% and 200% of the substrate height from the first deflecting roller 6.
  • the counter roller 7 can preferably have an elastic material and in particular a compressible material. This can be rubber, foam or the like, for example.
  • the substrate 2 can be pressed against the deflection roller 6 by a counter roller 7 with a pressure in a range from 10 to 100 Pa.
  • the counter roller 7 can be pressed against the substrate 2 by spring force, for example.
  • the deflecting rollers 6, 11 shown also have one or more suction opening (s) through which a negative pressure can be provided in the area of the surface of the deflecting roller 6, 11.
  • the substrate 2 can be fastened to the surface of the respective deflecting roller 6, 11 by the negative pressure.
  • the negative pressure within the deflection roller 6, 11, which can also be referred to as the residual pressure, can preferably be between 200 and 980 hPa, preferably between 700 and 900 hPa. In this case, a negative pressure within the second deflecting roller 11 is higher than the negative pressure in the first deflecting roller 6 in order to facilitate a transfer.
  • the suction openings can be, for example, the pores of a porous material.
  • the deflection roller 6, 11 can also be designed as a perforated roller, preferably with a plurality of holes.
  • the entirety of the holes and / or pores through which the substrate 2 is sucked define a hole area opposite a closed area.
  • the ratio of the perforated area to the closed area in the case of the first deflecting roller 6 can preferably be in a range from 10% to 20%.
  • a maximum diameter of a hole can be 2 mm, for example. However, the diameter of a hole is preferably smaller than 2 mm. Such a diameter advantageously minimizes temperature differences between the substrate 2 and the roller 6, 11, unevenness in the roller surfaces, and an application medium being sucked through the substrate 2.
  • the deflecting rollers 6, 11 can be designed as hollow cylindrical rollers with a perforated and / or porous outer surface. A negative pressure can then be generated in the inner volume of the hollow cylindrical deflecting roller 6, 11.
  • a cover device in the form of a curved cover plate 19, 20 can be arranged in the inner volume of the hollow cylindrical deflecting roller 6, 11. This is arranged in a stationary manner and closes part of the holes in the outer surface, so that no negative pressure can be provided in the area of the surface of the deflecting roller 6, 11 through these holes. If the deflecting roller 6, 11 rotates to convey the substrate 2, the holes of various subregions of the deflecting roller 6, 11 are closed by the fixedly arranged covering device 19, 20 in each rotational state.
  • the deflecting rollers 6, 11 thus each have suction areas in which the substrate 2 is sucked onto the respective surface, and dead zones 8, 12 in which no suction takes place. These dead zones 8, 11 are also stationary.
  • a suction area can denote, for example, an area in which a negative pressure can be provided in the area of the surface of the deflecting roller 6, 11 through the holes.
  • the holes cannot be closed by the cover plates 19, 20.
  • a dead zone 8, 12 can, for example, designate an area in which no through the holes Vacuum in the area of the surface of the deflecting roller 6, 11 can be provided.
  • the holes can be closed by the cover plates 19, 20.
  • the suction area is thus the area which is not covered by the covering device 20, 21. Due to a negative pressure prevailing in the respective deflecting roller, air is sucked in through the holes, whereby the substrate 2 remains fixed on the surface of the deflecting roller 6, 11 along this suction area.
  • the aforementioned variant of the deflection rollers 6, 11 with one or more suction openings is only a particularly preferred embodiment of the fixation of a printed substrate on a deflection roller 6, 11 for the purpose of turning over or turning over the substrate 2 called, which as an alternative or in addition to the fixation variant of the Fig. 1 can be chosen.
  • the deflection roller 6 having an adhesive layer so that the substrate 2 adheres to the adhesive layer at least in a central segment and can be carried along on the circular path segment.
  • the adhesive layer only forms weak adhesive forces with respect to the substrate 2, so that permanent adhesion is avoided.
  • a separating element for example a wedge-shaped bar, can be provided for detachment, which deflection roller 6, 11 is threaded between the substrate 2 and the deflection roller 6, 11 with continuous movement and enables the substrate 2 to be detached.
  • compressed air nozzles can also be provided on the wall of the deflecting roller 6, 11, which enable the substrate 2 to be detached from the adhesive layer.
  • the substrate 2 can also be releasably fixed to the deflecting rollers 6, 11 in some other way.
  • mechanical or magnetic fixation is possible.
  • the first deflecting roller 6 preferably has a radius of at least 20 mm, particularly preferably of at least 50 mm. However, a radius can also be in a range from 100 mm to 500 mm. This radius is particularly preferred for deflecting comparatively less flexible substrate materials, such as Cardboard boxes or flexible plastic cards, e.g. for ID cards and the like. The rule here is that the greater the radius, the lower the flexibility of the substrate 2. In the case of flexible plastic cards, for example, a radius greater than 100 mm, greater than 200 mm or even greater than 500 mm can be selected as the substrate 2. In contrast to sheets of paper, these would be kinked if the radius of the deflection roller was too small.
  • a fourth printing module 10 is arranged in the vertical direction z above the second deflection roller 11.
  • This fourth printing module 10 enables the back side of the substrate 2 to be printed in one or more colors. This enables the substrate 2 to be printed on both sides.
  • the printing module can also only be arranged in the area of the discharge table 14 and, if necessary, further printing modules can also be provided.
  • a second drying device 13 is arranged, which can dry the application medium applied to the rear side of the substrate 2, for example using warm air.
  • the printing and drying of the rear side of the substrate 2 can advantageously take place if the substrate 2 is still guided by the second circulating roller 11 on the circular path segment. However, it is also possible to carry out these two steps only when the substrate 2 has reached the discharge point 18 and is placed on the discharge table 14.
  • the feed direction R is to be understood as a direction along a transport trajectory which has several partial directions R1 to R6 in the course.
  • R1 is a first linear partial direction. This partial direction corresponds to the direction of conveyance along the infeed table 15 up to the deflection roller 6.
  • the substrate 2 can be printed on the front side on the section with this first partial direction R1.
  • R2 is a first curved partial direction, in particular a direction of a conveyance running in the shape of a circular arc.
  • a radius of the circular arc is specified by the first deflecting roller 6.
  • a Turning of the substrate 2. This turning can be done either as turning over or turning inside out, whereby turning over is particularly preferred in which a shorter front edge is arranged parallel to the longitudinal axis of the two deflection rollers 6, 11, while the two longer side edges of the substrate 2 when passing through the Procedure assume a partially curved shape.
  • the substrate 2 can be printed on the front side on the section with this second partial direction R2.
  • R3 describes a partial direction of the conveyance from the first circular path segment to the second circular path segment of the second deflecting roller 11.
  • This partial direction is in FIG Fig. 1 only one transfer point, but it is also possible that with a slight distance between the two deflection rollers 6 and 11, a guided transfer, e.g. by means of roller guides, or an unguided transfer by detaching or falling off the substrate 2 from the first deflection roller 6 and by picking up the substrate the second deflection roller 11 can take place.
  • R4 is a further curved partial direction, in particular a conveyance along a further circular arc section.
  • a radius of this circular arc is specified by the second deflecting roller 11.
  • the second deflection roller 11 enables the substrate 2 to be bent.
  • R5 then describes a curved partial direction of a conveyance away from the deflecting roller 11 towards a discharge table 14.
  • R6 is then a linear partial direction of a conveyance on the discharge table 14, for example until the substrate 2 is deposited, for example on a deposit pile.
  • the substrate 2 has one or more reference marks or position marks, on the basis of which a spatial position of the substrate 2 and of areas to be printed on the front and the rear of the substrate 2 can be determined.
  • the device 1 can comprise an image acquisition device, not shown, by means of which the substrate 2 can be imaged with the position marks.
  • the carriage with the printing modules 3, 4, 5 can be positioned relative to the substrate 2 in such a way that desired areas of the substrate 2 can be printed.
  • the guidance accuracy of the device can be displayed visually to the user or to the device using the position marks, for example by means of a scan.
  • These can be arranged on the substrate 2 before the substrate 2 is fed into the device 1 and facilitate the adjustment of the substrate 2 before and during printing.
  • the substrate 2 can comprise only a single copy or a plurality of copies which are arranged, for example, on a sheet.
  • the substrate preferably has a density of 0.8 g / cm 3 to 1.2 g / cm 3 .
  • the suction strength of the pulleys, the adhesive strength of the adhesive layer and the like must be selected accordingly.
  • a document of value and / or security document can be produced by printing a sheet.
  • This sheet can have several panels and at least one plastic layer, in particular a transparent plastic layer.
  • Any document that is a physical entity that is protected against unauthorized production and / or falsification by security features or elements can be referred to as a value and / or security document.
  • the background for example an emblem
  • the panel can be personalized using an inkjet method using the device according to the invention.
  • a value and / or security document has, in particular, security features.
  • Security features are features that at least make falsification and / or duplication more difficult than simple copying. Physical entities that comprise or form a security feature can be referred to as security elements.
  • a security document can contain several security features and / or comprise security elements. In the sense of the definition given here, a security document also always represents a security element. Examples of security documents which also include documents of value that represent a value include, for example, passports, identity cards, driver's licenses, identity cards, access control cards, health insurance cards, banknotes, postage stamps, bank cards, credit cards , Smart cards, tickets and labels.
  • the aforementioned print modules can each have one or more print heads. In a preferred embodiment variant, a color is assigned to each print head.
  • the print modules, in particular the print heads of the print modules, have discharge nozzles.
  • a distance between the print head (discharge nozzle) and the substrate 2 can preferably be between 0.7 mm and 2 mm.
  • a distance between a discharge nozzle, in particular a discharge nozzle row, to a discharge nozzle or discharge nozzle row following in the transport direction should preferably be less than 0.3 mm.
  • a further variant embodiment of a device 1 according to the invention is shown as an inkjet printing device.
  • the embodiment variant of the device 1 shown here is essentially like that in Figure 1
  • the illustrated embodiment of the device 1 is formed. Therefore, on the explanations too Figure 1 to get expelled.
  • the illustrated embodiment comprises the device 1 positioning devices 21, 22, 23 as well as a control and evaluation device 24.
  • the control and evaluation device 24 is connected to the positioning devices 21, 22, 23 in terms of signals and / or data.
  • a spatial position of a substrate 2 can be determined by means of the control and evaluation device 24, in particular if a section of the substrate 2 rests against the deflection roller 6 or is arranged in a feed section.
  • This spatial position can be determined in a coordinate system whose z-axis is oriented parallel and in the same direction as a vertical direction z.
  • a y-axis can be oriented perpendicular to the z-axis and perpendicular to the axis of rotation of the deflecting rollers 6, 11.
  • An x-axis not shown, can be oriented perpendicular to the z-axis and perpendicular to the y-axis.
  • the x-axis, the y-axis and the z-axis can form a Cartesian coordinate system.
  • control and evaluation device 24 can control the positioning devices 21, 22, 23 in order to position the printing modules 3, 4, 5 in a desired spatial position position.
  • the desired spatial position can in particular be a spatial position in which a printing module 3, 4, 5 can print on a desired area of the substrate 2.
  • This spatial position can also be determined in the coordinate system explained. It is possible here for the printing modules 3, 4, 5 to be moved along the explained x-axis by means of the positioning devices 21, 22, 23. This can correspond to a movement transverse to the feed direction R of the substrate 2. In addition, it may be possible to move the printing modules 3, 4, 5 by means of the positioning devices 21, 22, 23 also along the y-axis and / or along the z-axis.
  • a first positioning device 21 is used here for positioning the first printing module 3, a second positioning device 22 for positioning a second printing module 4 and a third positioning device 23 for positioning a third printing module 5.
  • the positioning devices 21, 22, 23 can be designed as linear drive devices or a include such.
  • a fourth positioning device 25 is also shown. This can also be connected to the control and evaluation device 24 in terms of signals and / or data.
  • the fourth printing module 10 can be moved along the explained x-axis by the fourth positioning device 25. It is of course also possible to move the fourth printing module 10 along the y-axis and / or along the z-axis. In this case, however, it is not absolutely necessary to provide a fourth positioning device 25 for the fourth printing module 10.
  • a further variant embodiment of a device 1 according to the invention is shown as an inkjet printing device.
  • the embodiment variant of the device 1 shown here is essentially like that in Figure 2
  • the illustrated embodiment of the device 1 is formed. Therefore, on the explanations too Figure 2 to get expelled.
  • the device 1 does not include a positioning device 25 for the fourth printing module 10.
  • the device 1 also includes an image acquisition device 26. This can be designed, for example, as a CCD or CMOS camera.
  • the image capturing device 26 is arranged in such a way that at least a partial area of the first side of a substrate 2 can be imaged by the image capturing device 26.
  • the sub-area can be mapped in particular when a section of the substrate 2 rests against the deflecting roller 6 or is arranged in a feed section.
  • the image acquisition device 26 can be connected to the control and evaluation device 24 in terms of signals and / or data. Output signals, in particular image data, of the Image acquisition device 26 can thus be transmitted to control and evaluation device 24. Furthermore, an image-based determination of the spatial position by the control and evaluation device 24 can take place as a function of the image data generated by the image acquisition device 26.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ink Jet (AREA)

Claims (8)

  1. Dispositif (1) d'impression sur un substrat (2) en forme de feuille, le dispositif comprenant au moins un module d'impression (3-5), au moins un premier rouleau de renvoi (6) destiné à transporter le substrat et au moins une unité d'alimentation, le substrat (2) pouvant être amené au premier rouleau de renvoi (6) au moyen de l'unité d'alimentation, l'au moins un module d'impression (3-5) étant disposé de telle sorte qu'une première face du substrat (2) peut être imprimée dans une portion du substrat (2), laquelle portion est en appui sur le rouleau de renvoi (6) ou est disposée dans une portion d'alimentation, le dispositif comprenant au moins une unité de commande et d'évaluation (24), une position du substrat (2) dans l'espace pouvant être déterminée au moyen de l'unité de commande et d'évaluation, le dispositif comprenant au moins une unité de recouvrement (19) destinée à fermer des trous ménagés dans une portion de la surface du premier rouleau de renvoi (6), l'au moins une unité de recouvrement (19) étant disposée de manière fixe par rapport à l'axe de rotation du rouleau de renvoi (6),
    caractérisé en ce que
    une unité de positionnement (21, 22, 23, 25) destinée à l'au moins un module d'impression (3-5) peut être commandée en fonction de la position dans l'espace au moyen de l'unité de commande et d'évaluation (24), le dispositif comprenant au moins un autre rouleau de renvoi (11), le substrat (2) pouvant être transporté du premier rouleau de renvoi (6) à l'autre rouleau de renvoi (11), le premier et l'autre rouleau de renvoi (6, 11) se touchant en au moins un point de transfert (16) ou au moins une portion de transfert ou une distance minimale entre les rouleaux de renvoi (6, 11) correspondant à l'épaisseur du substrat, au moins une portion d'une surface du premier et de l'autre rouleau de renvoi (11) étant perforée pour produire une pression négative dans la zone de la surface, le dispositif comprenant au moins un moyen de fixation destiné à fixer le substrat (2) à au moins une portion d'une surface du premier et de l'autre rouleau de renvoi (6, 11), le dispositif comprenant au moins une unité destinée à générer une pression négative dans l'au moins une portion de la surface du premier et de l'autre rouleau de renvoi (11), au moyen de laquelle le substrat (2) est fixé à la surface, la pression négative dans l'autre rouleau de renvoi (11) étant supérieure à une pression négative dans le premier rouleau de renvoi (6).
  2. Dispositif selon la revendication 1, caractérisé en ce que le substrat (2) peut être fixé en un point de contact (17) sur la surface du premier rouleau de renvoi (6), la fixation en un point de transfert (16) étant amovible, le substrat fixe (2) pouvant être transporté entre le point de contact (17) et le point de transfert (16) par le premier rouleau de renvoi (6) le long d'un trajet en segment de cercle.
  3. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le dispositif comprend au moins une unité de positionnement de l'au moins un module d'impression (3-5), le module d'impression (3-5) pouvant être déplacé transversalement à la direction d'avancement (R) du substrat (2) au moyen de l'unité de positionnement.
  4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le dispositif comprend au moins un autre module d'impression (10), l'au moins un autre module d'impression (10) étant disposé de telle sorte qu'une autre face du substrat (2) puisse être imprimée dans une portion du substrat (2), laquelle portion est en appui sur l'autre rouleau de renvoi (11) ou est disposée dans une portion de sortie.
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le dispositif comprend au moins une unité de capture d'images (26), l'unité de capture d'images (26) étant disposée de telle sorte qu'au moins une zone partielle de la première face puisse être reproduite par l'unité de capture d'images (26).
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le dispositif comprend une autre unité de recouvrement (20) destinée à fermer des trous ménagés dans une portion de la surface de l'autre rouleau de renvoi (11).
  7. Procédé d'impression d'un substrat (2) en forme de feuille au moyen d'un dispositif selon l'une des revendications 1 à 6, le substrat (2) étant amené à un premier rouleau de renvoi (6), une première face du substrat (2) étant imprimée dans une portion du substrat (2), la portion étant en appui sur le premier rouleau de renvoi (6) ou étant disposée dans une portion d'alimentation associée au premier rouleau de renvoi (6), une position du substrat (2) dans l'espace étant déterminée, une unité de positionnement (21, 22, 23) destinée à l'au moins un module d'impression (3-5) étant commandée en fonction de la position dans l'espace, le substrat (2) étant transporté le long d'un trajet en segment de cercle au moyen du premier rouleau de renvoi (6), la portion du substrat (2) en appui sur le premier rouleau de renvoi (6) le long du trajet en segment de cercle étant fixée à une surface du premier rouleau de renvoi (6), la portion du substrat (2) étant transportée le long d'un autre trajet en segment de cercle au moyen de l'autre rouleau de renvoi (11) après que la fixation sur la surface du premier rouleau de renvoi (6) a été libérée, la portion du substrat (2) en appui sur l'autre rouleau de renvoi (11) le long de l'autre trajet en segment de cercle étant fixée à la surface de l'autre rouleau de renvoi (11), une pression négative dans l'autre rouleau de renvoi (11) étant supérieure à une pression négative dans le premier rouleau de renvoi (6).
  8. Procédé selon la revendication 7, caractérisé en ce qu'une autre face du substrat (2) est imprimée dans une portion du substrat (2), la portion étant en appui sur un autre rouleau de renvoi (11) ou étant disposée dans une portion de sortie du dispositif.
EP17788237.0A 2016-10-27 2017-10-25 Dispositif et procédé pour imprimer un substrat en forme de feuille Active EP3532297B1 (fr)

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DE102016221192.7A DE102016221192A1 (de) 2016-10-27 2016-10-27 Vorrichtung und Verfahren zum Bedrucken eines bogenförmigen Substrats
PCT/EP2017/077265 WO2018077927A1 (fr) 2016-10-27 2017-10-25 Dispositif et procédé pour imprimer un substrat en forme de feuille

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DE102020110185A1 (de) 2020-04-14 2021-10-14 Bundesdruckerei Gmbh Trommel für eine druckvorrichtung, druckvorrichtung und verfahren zum zeitweisen fixieren eines bogenförmigen substrats an einer trommel

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EP3532297A1 (fr) 2019-09-04
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