EP2855161B1 - Imprimante additionnelle dans une presse offset - Google Patents

Imprimante additionnelle dans une presse offset Download PDF

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Publication number
EP2855161B1
EP2855161B1 EP13727097.1A EP13727097A EP2855161B1 EP 2855161 B1 EP2855161 B1 EP 2855161B1 EP 13727097 A EP13727097 A EP 13727097A EP 2855161 B1 EP2855161 B1 EP 2855161B1
Authority
EP
European Patent Office
Prior art keywords
printing
sheet
dryer
impression cylinder
print head
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
EP13727097.1A
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German (de)
English (en)
Other versions
EP2855161A1 (fr
Inventor
Rainer Gebhardt
Hans-Bernd Jäger
Edgar Werber
Holger Wiese
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
Original Assignee
Manroland Sheetfed GmbH
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Filing date
Publication date
Application filed by Manroland Sheetfed GmbH filed Critical Manroland Sheetfed GmbH
Publication of EP2855161A1 publication Critical patent/EP2855161A1/fr
Application granted granted Critical
Publication of EP2855161B1 publication Critical patent/EP2855161B1/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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
    • B41J3/546—Combination of different types, e.g. using a thermal transfer head and an inkjet print head
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • 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
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface

Definitions

  • the invention relates to a pressure-formless printing device in a sheet-fed printing machine according to the preamble of claim 1.
  • NTP non-impact print
  • laser printing devices or thermographic printing devices are known.
  • the NIP devices may also be embodied as inkjet printing devices having one or more inkjet printheads, which may operate on any inkjet principle.
  • inkjet devices are used for the processing of solvent-based or wax-based inks, lacquers or other coating media that print on different principles (Continouos Inkjet, Drop on Demand) and allow to dry (UV radiation, infrared radiation, Electron beam, hot air, etc.).
  • a sheet-fed printing machine in which a formed as an inkjet printing device or as a laser printing device, pressure-free printing device is integrated into an offset printing unit.
  • 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.
  • Another sheet-fed press with a built-in pressure-free printing device is from the DE 195 14 259 A1 known according to this prior art, the printing formless printing device in the transport direction of the Printing sheet seen after the last offset printing unit and before a boom of the sheet-fed press is integrated into the same.
  • the sheet-fed printing machine is provided with a feeder for feeding sheet to be printed in the sheet-fed press, with several printing units and / or coating units for printing the sheet with a static, identical for all sheets printed image, with a boom for discharging printed sheet from the sheetfed press, and at least a built-in sheetfed press formless printing device provided.
  • a multi-color inkjet printing unit is integrated in the sheet-fed press in the field of a printing unit or coating unit.
  • Another sheet-fed printing machine which is provided with a feeder, with a boom and with several printing units and / or coating units.
  • the sheets to be printed are transported by means of sheet transfer cylinders from the feeder in the direction of the delivery arm through each printing unit and / or each coating unit.
  • At least one sheet transfer cylinder has at least one gripping device for printed sheets, which lies completely within a contour defined by an outer surrounding surface of the sheet transfer cylinder, wherein at least one of these sheet transfer cylinders is associated with an inkjet printing device such that printed sheets guided on the sheet transfer cylinder can be printed with the aid of the inkjet printing device are.
  • An ink jet printing device comprises an ink jet head having a nozzle surface in which ink jet nozzles are arranged; and a cleaner for scraping off the nozzle surface. Furthermore, a supply spindle and a receiving spindle for rolling a strip-shaped scraper element are present.
  • the scraper member runs along a predetermined raceway parallel to the nozzle surface, being wound around a peripheral surface of a pressure roller. Guide devices guide the wiper element between the supply spindle and the pressure roller and between the pressure roller and the receiving spindle. The stripping element wrapped around the pressure roller is applied against the nozzle surface.
  • the nozzle surface is inclined to the horizontal and inclined with respect to the axes of the spindles.
  • each formless printing devices inkjet printing device are firmly integrated within the facilities of the printing or sheet transport units, so that at each interesting for a pressure-formless printing device installation position a corresponding pressure-formless printing device must be kept. This increases the investment requirement for such sheet-fed presses.
  • a device and a method with which the control of the application of a substance to a substrate can be controlled.
  • a substrate web is guided over two special guide rollers close to a non-impact printhead over.
  • the print head is fixedly connected to the holder of the guide rollers, which is arranged to be displaceable.
  • the impact-free pressure takes place within the displaceable web guiding device.
  • the pivotability of the web guiding device serves to change the web guiding path.
  • a means for saving ribbon in a thermal printer by moving the ribbon through a printing nip described.
  • the thermal printer is described as a movable printhead opposite a fixed plate, with a substrate supported on the plate.
  • the print head must therefore be movable in order to be able to cover the working area of the substrate. For better utilization of the ribbon this is moved during printing through the printing nip.
  • the present improvement is based on the problem to provide a novel inkjet device as an additional printing device for a sheet-fed press according to the preamble of claims 1 and 8, in which an easier handling in connection with aggregates for offset printing or painting integrated use of printing press units , It should continue to be a safe operation to produce high-quality inkjet prints are made possible.
  • the pressure-formless printing device in the printing machine is arranged movable and adjustable such that it can be removed at least from the surface of the associated cylinder and at least from the working space of alternatively applicable coating devices.
  • a stray radiation of a dryer used for the curing or drying of inkjet prints on the substrates is prevented by means of bulkheads and / or control measures from influencing the inkjet devices
  • the printing device is designed to be displaceable or pivotable, so that it can be positioned within a printing unit of a sheet-fed printing machine relative to a cylinder associated therewith.
  • the printing device is preferably mounted on an adjusting device, by means of which they can be spaced from the associated, a printing material leading cylinder.
  • a printing device is therefore, if it should be done with this no printing of the sheet, at its installation position off the cylinder.
  • the printing device can be assigned to a cleaning device.
  • the printing device may be further positioned to perform maintenance or cleaning operations so that the process of cleaning itself can be effectively performed.
  • it is provided to attach the pressure-formless printing device to a pivoting mechanism, which moves to a working position on a sheet-leading counter-pressure cylinder and a parking position outside the working range of, for example, executed as a paint module printing unit.
  • a displacement carried out radially to the surface of the associated sheet can be effected in a stowed position.
  • the printing device in the printing unit of the sheet-fed printing press is mounted on a guide device which executes a settling movement.
  • a guide means allows a movement for positioning the printing heads parallel to the axis of the impression cylinder.
  • the printing device is guided in parallel between a working position on the impression cylinder and a parking or maintenance position outside an installation, maintenance or operating area of a displaced as a paint module.
  • the pivoting movement of the printing device can be done with built-in and removed chamber doctor blades and anilox rollers.
  • Each print head of the printing device can be positioned on the guide devices in their working position on the impression cylinder in a closed position or a shutdown position.
  • the printheads are designed as inkjet printhead.
  • the printheads are associated with capping means which are effective or applied when a printhead is brought into the shutdown position or the printing formless printing device in maintenance or parking position.
  • the printing device is downstream of a dryer (14) in the transport direction.
  • shielding devices are provided for keeping a stray dryer radiation away from the nozzle surface.
  • Shielding devices are located on the printhead / inkjet printhead and / or on the dryer and / or between dryers (14) and the inkjet printheads.
  • the dryer may be associated with a suction device.
  • the dryer can be controlled and switched off in the area of non-printed areas or in the cylinder channel.
  • the dryer can be an LED UV dryer connected to the press control.
  • the device according to the invention is integrated in a sheet-fed printing machine with at least one pressure-formless printing device D, which serves for printing the printed sheet with a particularly dynamic or variable printed image or variable image components such as numbering, coding or addressing.
  • the printing of the printed sheet with the dynamic or variable printed image is preferably carried out inline for printing of printed sheets with a static or invariable printed image, which is printed in the printing units or coating units of the sheet-fed press.
  • FIG. 1 shows a schematic representation of a device according to the invention with an outline of a printing unit 1, which may be formed as an offset printing or coating unit or base module of a sheet-fed press.
  • the printing unit 1 is then part of a multi-color sheetfed press.
  • This is a bow leading impression cylinder 2 with a cylinder channel 3 and associated therewith a gripper assembly 4 is provided.
  • This illustrated gripper assembly 4 is used to grab a sheet B at its seen in a direction of transport T of the sheet printing machine forward edge to hold while doing on the surface of the impression cylinder 2 through the printing unit 1.
  • an inkjet printhead 5 is integrated into a printing unit 1 or a varnish module of a sheet-fed offset printing machine, the inkjet printhead 5 is arranged in each case opposite a sheet leading cylinder in the area after the passage of sheet by a printing gap formed by the impression cylinder and a blanket cylinder ,
  • the printing unit 1 configured as a paint module in which a forme cylinder 12 is associated with the impression cylinder 2.
  • an applicator roller 22 which is usually designed as an anilox roller, and a chambered doctor blade 21 arranged removable.
  • the paint module is still referred to as printing unit 1.
  • an inkjet print head 5 is assigned.
  • the inkjet printhead 5 has on its underside a nozzle surface 5.1 with nozzle rows or nozzle arrays from which the printing ink is ejected in the desired image patterns.
  • the inkjet print head 5 must be positioned very accurately relative to the sheet guiding surface on the impression cylinder 2, since the quality of the inkjet printing process depends strongly on a nozzle surface 5.1 held at a uniform and short distance from the substrate surface.
  • the inkjet print head must also be positioned in the width direction to the printing material so parallel to the axial direction of the impression cylinder 2 in order to determine the position of the dynamic impressions can.
  • the inkjet print head 5 is therefore (possibly by means of a drive) slidably received via a guide 6 on a traverse 7 in the axial direction of the impression cylinder 2. Furthermore, the cross member 7 is provided at its ends with brackets 8, respectively, at each of which upper and lower hinge points 8.1 and 8.2 are provided for the articulated receiving a lower end of a respective upper arm 9A and a lower arm 9B.
  • the upper arm 9A is at its upper end at a hinge point 9.1 and the lower arm 9B is disposed at its upper end at a pivot point 9.2.
  • the hinge points 9.1, 9.2 are arranged on both sides of the impression cylinder 2 fixed to the frame brackets 10 fixed to the frame in the printing unit 1.
  • the traverse 7 can be positioned both horizontally to the impression cylinder 2, as well as radially to the impression cylinder 2 on and off.
  • the arrangement of the upper and lower links 9A and 9B forms as in FIG FIG. 1 illustrated a parallelogram. Therefore, it is ensured that during a pivoting operation of the arrangement of the inkjet print head 5 is always positioned in a vertical orientation, so that it can not come to unintentional ink leakage on the print head.
  • the arrangement of the printing formless printing device D in the printing unit 1 is designed so that this can be used efficiently. Therefore, the arrangement of the handlebars 9A and 9B may be provided in a first variant so that the inkjet print head 5 in a chambered doctor blade 21 removed from the printing unit or paint module 1 and a developed anilox roller 22 in a very close to the remaining in the printing unit 1 forme cylinder 12 Working position can be brought. Furthermore, the arrangement of the handlebars 9A and 9B may be provided in a second variant so that the inkjet printing head 5 in the printing unit or paint module 1 remaining anilox roller 22 and possibly also in the printing unit 1 remaining chamber doctor blade 21 in a very close to in the printing unit 1 remaining form cylinder 12 lying working position can be brought. It is essential here that the inkjet print head 5 is aligned as vertically as possible in the working position with ideally radial assignment to the impression cylinder 2 in order to ensure optimum printing functionality.
  • the printing formless printing device D can, as shown in the exemplary embodiment, be guided past holders (which are only symbolically indicated here) arranged in connection with the side walls of the printing unit 1 for the chambered doctor blade 21 and the anilox roller 22.
  • This positioning stops 11 may for example be mounted eccentrically and so be aligned in its altitude relative to the surface of the impression cylinder 2.
  • the distance of the inkjet print head 5 can be adjusted in relation to the impression cylinder 2, wherein preferably a minimum distance of the inkjet print head 5 is prepared for each predetermined substrate surface. The distance results from the thickness of the printing material used in each case when a printed sheet rests on the impression cylinder 2.
  • Means may be provided for locking the printing formless printing device D in contact with the crosshead 7 and the holders 8 on the positioning stops 11 in order to secure the position of the inkjet printing heads 5 in the working position.
  • FIGS. 2A and 2B further positions of the printing formless printing device D are shown in which the printing formless printing device D are pivoted on the links 9A, 9B from the working position on the impression cylinder 2 upwards in the range of a movement range C.
  • the range of movement C can be defined by appropriate construction and attachment of the links 9A, 9B.
  • the FIGS. 2A and 2B represent a possible embodiment in which it is assumed that the chamber doctor blade 21 and anilox roller 22 are removed from the printing unit 1, when the printing formless printing device D is to be used.
  • the printing formless printing device D and its pivoting mechanism can also be designed such that a removal of chambered doctor blade 21 and anilox roller 22 is not absolutely necessary.
  • a motor drive can be provided, by means of which one or more of the links 9A, 9B are pivoted on one or both sides synchronously, starting from the frame-fixed bearings in the bearing points 9.1 and / or 9.2.
  • a manual operation is possible, wherein the pivoting movement can then be supported by weight balance, for example by means of a gas spring.
  • the movement can then be secured by the means of locking and unlocking the handlebars 9A, 9B on the printing unit 1, starting from the traverse.
  • the locking and unlocking can be carried out continuously by one or more braking mechanisms in one or more hinge points 8.1, 8.2, 9.1 and / or 9.2 within the range of movement C of the printing formless printing device D.
  • FIG. 2A shows a lifted off the impression cylinder 2 position in which the printing forme printing device D is positioned by means of the handlebars 9A, 9B approximately horizontal to the frame-fixed brackets 10. Such a position may be used to perform maintenance during the printing operation where improved access to the inkjet printheads 5 and / or nozzle surfaces 5.1 thereof is required.
  • FIG. 2B shows the working position opposite end position of the pivoting portion C of the printing formless printing device D.
  • the inkjet printheads 5 are now pivoted to its upper end position, where the printing formless printing device D is also locked.
  • the printing unit 1 is again used in its function as a paint module. Therefore, here are the chamber doctor blade 21 and the anilox roller 22 is used in their brackets in the area 20 and assigned to the forme cylinder 12.
  • the inkjet printheads 5 are closed in the parking position, so that the ink can not dry in the nozzle surface.
  • the nozzle surface is therefore provided with a cover 5.2, which ensures a tight seal and the nozzle surface also protects against accidental contact.
  • FIG. 1 the working position of the inkjet print head 5 is shown on the impression cylinder 2.
  • the inkjet printhead 5 has been moved to the handlebars 9A, 9B manually or by means of an associated drive to close over the surface of the counter-pressure cylinder 2 carrying the signature B.
  • The, as shown here, lowered gripper gripper device 4 protrude not or only minimally over the surface of the sheet B, so that the inkjet printhead 5 for effective and accurate imaging with its nozzle surface 5.1 as far as possible to the surface to be printed can be approximated.
  • the leaking ink drops are thus transferred by the shortest route and exactly to the desired image locations.
  • FIG. 3 is the printing formless printing device D on the impression cylinder 2 shown in plan view.
  • the form cylinder 12 is therefore located in front of the impression cylinder 2.
  • the position of the cylinder axes is shown in each case with dashed dotted lines, wherein the axis of the forme cylinder 12 is denoted by 12A.
  • the link 9A is now seen hinged to the brackets 8 at the two-sided end of the cross member 7.
  • the hinge points 8.1 are provided on the brackets 8 on the traverse 7.
  • the link 9A is further assigned to the brackets 10 via the hinge points 9.1 frame fixed in the printing unit 1.
  • the handlebar 9B and the hinge points 8.2 and 9.2 are not visible in this representation.
  • the positioning stops 11 are shown in the area of the brackets 8 on the traverse 7, the positioning stops 11 are shown.
  • the bearing points 20 for the chamber doctor blade 21 and the anilox roller 22 are also symbolically shown, which are above the positioning stops and at which the printing plateless printing device D must be guided past the impression cylinder 2 for employment.
  • the position of the link 9A, 9B is chosen so that they can be performed when hiring the printing formless printing device D to the impression cylinder 2 on the lateral faces of the forme cylinder 12 to the vicinity of the forme cylinder 12 frontally associated bearing pin 13.
  • FIG. 4 the printing formless printing device D is shown on the impression cylinder 2 in a frontal view.
  • the printing formless printing device D with the inkjet printing head 5 is shown here in its working position close to the impression cylinder 2.
  • the position of the forme cylinder 12 is characterized by the position of its axis 12A.
  • the form cylinder 12 is in this view, therefore, partially behind the counter-pressure cylinder 2 shown cut.
  • the traverse 7 is here so parallel to the extension of the impression cylinder 2.
  • the handlebars 9A and 9B are arranged in the illustrated working position to the left and right of the working surface of the forme cylinder 12 near its cylinder pin 13.
  • the upper hinge points 9.1 and 9.2 are shown on the frame-fixed brackets 10 and the lower arm 9B, since the upper arm 9A is cut away in the upper area.
  • FIG. 4 the attachment of two inkjet printheads 5 is shown on the traverse 7.
  • the inkjet print head 5 shown on the right is positioned in working position on the impression cylinder 2.
  • the illustrated on the left inkjet printhead 5 is switched to an inactive position by the inkjet printhead 5 has been moved at its arranged on the cross member 7 bracket 6 up in a shutdown position.
  • This function is of particular advantage when a plurality of inkjet printheads 5 are arranged on the traverse 7, but not all printheads are required for a print job, but the inkjet printheads 5 should remain permanently in the printing unit 1.
  • a suitable (not shown here) sliding mechanism can be used between inkjet printhead 5 and holder 6, on which the inkjet printhead 5 between two detent positions in the on position (see inkjet printhead 5 shown on the right) and shutdown (see inkjet printhead 5 shown on the left) relative to the respective holder 6 and thus also the traverse 7 is displaceable.
  • the device of the pivot mechanism of the parallel link mechanism for the printing formless printing device D and the device of the sliding mechanism for each inkjet printhead 5 is to ensure that the working position of an inkjet printhead 5 with respect to the surface of the impression cylinder 2 accurately and can be determined vibration-free or low vibration.
  • a closure 5.2 is placed on the region of the nozzle surface 5.1.
  • the closure 5.2 is designed so that it prevents a displacement of the inkjet print head 5 in the on position with the closure 5.2.
  • the closure 5.2 can be designed as an automatically latching cover, which is pushed, retracted or folded in the shutdown position from a region near the nozzle surface 5.1 automatically from the inkjet print head 5 or its holder 6 from the nozzle surface 5.1 when moving the inkjet printhead can.
  • Each inkjet printhead 5 is provided with a supply-side, ie mechanical or ink side, as well as a control-side, so electrically or electronically pronounced interface. Via the interface of the inkjet printhead 5 can be connected to a holder, an ink supply system and a control device of the respective sheet-fed press. As a result, easy disassembly and assembly of the inkjet printhead 5 is ensured at an installation position of a sheet-fed press.
  • inkjet printheads 5 are to be integrated into a sheet-fed printing machine at several installation positions, then the supply-side, namely mechanical or ink side, interfaces as well as the control-side, namely the electrical or electronic interfaces for these inkjet printheads 5 can be centralized , All in one sheet-fed press integrated inkjet printheads 5 are preferably connected via a central ink supply device and to a central control device. There are also decentralized and mobile ink supply facilities and controls for the inkjet printheads 5 possible.
  • Each inkjet printhead 5 or each printing formless printing device D with a plurality of inkjet printheads 5 is preferably assigned its own control panel in order to be able to carry out control tasks and maintenance work on the inkjet printheads 5 independently of the sheet-fed printing press.
  • the required number of print heads of the printing formless printing device D can also be varied in the transport direction of the printed sheet. Functionally, such an arrangement is determined by the fact that a desired printing speed may be greater than the performance of an inkjet printhead 5 allows for a given printing speed, so that the desired patterns could not be completely printed. Furthermore, it may be necessary that a plurality of printing inks or inks or different coating media should be applied to the printed sheets with the aid of inkjet printheads 5. Finally, the number of inkjet printheads 5 in the transport direction of the print sheets is defined by the desired print resolution in relation to the given print resolution of the printhead used, such that a maximum print speed is achieved by consecutively adding complementary inkjet printheads 5 to each other Print image samples. Thus, the printing performance requirement, which is determined with respect to the resolution of an image by the repetition frequency of the ink drops, is halved for each print head and the printing speed can be increased accordingly.
  • variable image produced by the printing formless printing device D it is furthermore necessary for the variable image produced by the printing formless printing device D to be protected against damage within the printing press. This is particularly necessary for inkjet devices, since the inkjet inks have system-related low viscosity and therefore are initially very sensitive to touch and movement. For this reason, drying the variable image as soon as possible is of great importance.
  • UV systems In connection with pressure-free printing devices different drying methods can be used. Of particular advantage are UV systems. This UV-curable curable inks or coating media are used, which are then treated with a UV lamp. UV lamps are currently often designed as LED spotlights, which are variably controllable.
  • the basis for the solution according to the invention is a very rapid drying and, accordingly, the drying device to be arranged as close as possible to the printing location.
  • the following embodiment relates to a UV system.
  • FIG. 5 is in a representation according to FIG. 1 in addition to the inkjet printing device D, a drying device 14 is shown.
  • the printing sheet B seen in the transport direction or the inkjet printheads 5 preferably downstream of a drying device or curing device and / or a suction device 19 downstream.
  • the drying device 14 serves to dry or harden the ink applied by means of the inkjet print heads 5 or 5.
  • the inkjet ink is relatively thin and does not beat fast enough at the high printing speeds of the press.
  • a suction device 19 can be used for the extraction of solvent vapors or UV radiation resulting decomposition products of the air or the ink or the coating medium applied via the inkjet print head 5.
  • dryers are arranged downstream of one or more inkjet printheads in a sheet-fed printing machine, it is provided to shield the dryer radiation from the inkjet printheads 5, so that the residual ink on the nozzle surface 5.1 is not dried, thus hindering the printing process and thereby the print quality is worsened.
  • FIG. 5 a whole series of facilities are shown, all of which serve to dry and at the same time ensure the functioning of the inkjet printhead.
  • These devices are all to be seen in conjunction with a dryer 14, which is associated with the impression cylinder 2 in the transport direction T after the inkjet print head 5.
  • This dryer is preferably designed as a UV dryer, so that also UV ink in the inkjet print head 5 will be used for the printing operation.
  • a first shielding device 15 is attached to the inkjet printhead 5. It is mounted, constructed and equipped from such a material and / or with such a surface that the shielding 15 well absorbed or reflected dryer radiation of the dryer 14 and thus prevents it from entering the area of the nozzle surface 5.1 of the inkjet printhead 5.
  • a second shielding device 18 is attached to the inkjet printhead 5 facing side of the dryer 14. It is mounted, constructed and made of such a material and / or provided with such a surface that the shielding 15 well absorbed or reflected dryer radiation of the dryer 14 and thus prevents it in the area of the inkjet print head 5 or in the region of the nozzle surface 5.1 of the inkjet printhead 5 to get.
  • a radially directed to the impression cylinder 1 Schott is arranged as a third shielding 16 in the area between the inkjet printhead 5 and the dryer 14.
  • a sheet guiding device 17 may be provided which serves as protection against unintentional turning over of the sheet end of the printed sheet B.
  • a pneumatic impingement of the printed sheet B take place, in which there is provided a blast air device.
  • the targeted control of the dryer 14 with regard to the exposure time is also provided.
  • the targeted control of the dryer 14 with regard to the exposure time is also provided.
  • when passing through the cylinder channel 3 under the dryer 14 is provided to shut down the dryer 14 or completely off. This is possible with modern, very fast switchable LED dryers for UV radiation.
  • a monitoring device in the form of an inspection system can be provided in connection with the pressure-free printing system.
  • a camera 30 is provided, which is mounted in connection with the inkjet printhead 5 on the traverse 7.
  • the camera 30 can be designed as a line camera and directs a scanning beam 31 directly to the printing area of the printing sheet B in the sheet transport direction T behind the inkjet printing head 5. From this area, the printing result is recorded and then stored in a memory.
  • a prerequisite for the most accurate possible operation of the inspection device is a sufficient illumination of the scanning of the camera 30. For this purpose, special lighting devices may be provided.
  • a control device of the inspection system connected to the camera 30 and the machine control or the control of the pressure-free printing device D prepares the image scanned on the printed sheet B and makes it available in a memory for a quality comparison.
  • the comparison may optionally relate to the content in terms of printed and recognizable characters and to match this digitally with a template containing the corresponding digital characters.
  • the device can also be designed to be able to perform an image comparison with a digital image template. From the comparison operations there are indications for the usability of the produced prints. In this case, a distinction can be made according to absolute accuracy or relative freedom from errors. When comparing the image, the result will be based on the composition of the image and its quality as well as the sparkleness and defects.
  • the possibly security-relevant content is compared with a memory content, so that required data is identified.
  • the image content has important and less important areas that can be distinguished in the evaluation.

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  • Ink Jet (AREA)
  • Printers Characterized By Their Purpose (AREA)
  • Common Mechanisms (AREA)

Claims (13)

  1. Dispositif d'impression de feuilles d'impression (B) au moyen d'un dispositif d'impression sans cliché (D) dans une machine d'impression de feuilles comportant au moins un groupe d'impression (1),
    dans lequel un cylindre de contre-pression guidant les feuilles (2) est prévu, une ou plusieurs têtes d'impression (5) sont disposées respectivement en face de la surface du cylindre de contre-pression guidant les feuilles (2),
    le dispositif d'impression sans cliché (D) est disposé dans un des groupes d'impression (1) de la machine d'impression de feuilles sur un dispositif de guidage (9) exécutant un mouvement de dépôt,
    le dispositif d'impression sans cliché (D) est intégrable à un dispositif de guidage exécutant un mouvement présentant au moins un composant radial par rapport au cylindre de contre-pression (2) dans la machine d'impression de feuilles et est positionnable en face de la surface guidant les feuilles au niveau du cylindre de contre-pression (2),
    caractérisé en ce que le dispositif d'impression sans cliché (D) est intégrable en liaison avec un dispositif de guidage (9) réalisé sous forme d'un guide en parallélogramme pour exécuter un mouvement de pivotement d'approche et d'éloignement par rapport à la surface du cylindre de contre-pression (2) dans la machine d'impression de feuilles.
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif d'impression sans cliché (D) est pourvu d'un dispositif de guidage (7) qui permet un mouvement de positionnement de la tête d'impression (5) parallèlement à l'axe (2A) du cylindre de contre-pression (2).
  3. Dispositif selon les revendications 1 et 2, caractérisé en ce que le dispositif d'impression sans cliché (D) est intégrable au niveau d'un dispositif de guidage (9) exécutant un mouvement de pivotement à guidage parallèle depuis une position opérationnelle au niveau du cylindre de contre-pression (2) vers une position de parking ou de maintenance en dehors d'une zone de montage ou de maintenance ou de manœuvre de dispositifs d'alimentation en peinture ou en vernis d'un groupe d'impression (1) réalisé sous forme d'un module de vernissage dans la machine d'impression de feuilles.
  4. Dispositif selon une ou plusieurs des revendications 1 à 3, caractérisé en ce que le dispositif d'impression sans cliché (D) est intégrable en liaison avec un dispositif de guidage (9) réalisé sous forme d'un guide en parallélogramme pour exécuter un mouvement de pivotement d'approche et d'éloignement dans un groupe d'impression (1) réalisé sous forme d'un module de vernissage dans la machine d'impression de feuilles.
  5. Dispositif selon la revendication 4, caractérisé en ce que le dispositif d'impression sans cliché (D) est intégrable en liaison avec un dispositif de guidage (9) réalisé sous forme d'un guide en parallélogramme pour exécuter un mouvement de pivotement d'approche et d'éloignement dans le groupe d'impression (1), la racle de chambre (21) étant montée et le rouleau tramé (22) étant monté ou la racle de chambre (21) étant déposée ou la racle de chambre (21) étant déposée et le rouleau tramé (22) étant déposé, dans la machine d'impression de feuilles.
  6. Dispositif selon une ou plusieurs des revendications 1 à 5, caractérisé en ce que la ou chaque tête d'impression (5) du dispositif d'impression sans cliché (D) est intégrable au niveau des dispositifs de guidage (7, 9) dans la machine d'impression de feuilles de manière à ce que la ou chaque tête d'impression (5) soit positionnable au niveau du dispositif de guidage (9) dans sa position opérationnelle dans une position d'activation associée au cylindre de contre-pression (2) ou dans une position de désactivation dissociée du cylindre de contre-pression (2).
  7. Dispositif selon une ou plusieurs des revendications 1 à 6, caractérisé en ce que la ou chaque tête d'impression (5) est réalisée sous forme d'une tête d'impression à jet d'encre.
  8. Dispositif selon une ou plusieurs des revendications 1 à 7, caractérisé en ce que la ou chaque tête d'impression ou tête d'impression à jet d'encre (5) est pourvue d'un dispositif de découvrement (5.2) qui devient actif lorsque la tête d'impression à jet d'encre (5), en position opérationnelle du dispositif d'impression sans cliché (D) au niveau de son support (6), est amenée en position de désactivation ou lorsque le dispositif d'impression sans cliché (D) est amené dans une position de maintenance ou de parking qui est éloignée de la position opérationnelle au niveau du cylindre de contre-pression (2) du groupe d'impression (1).
  9. Dispositif selon une ou plusieurs des revendications 1 à 8, caractérisé en ce qu'un dispositif de séchage (14) est installé en aval du dispositif d'impression sans cliché (D), vu dans le sens de transport des feuilles d'impression (B), et que des dispositifs de blindage (15 ; 16 ; 17 ; 18) permettant de tenir à distance un rayonnement de séchage erratique de la surface des buses (5.1) sont prévus.
  10. Dispositif selon la revendication 9, caractérisé en ce que les dispositifs de blindage (15 ; 16 ; 17 ; 18) permettant de tenir à distance un rayonnement de séchage erratique de la surface des buses (5.1) sont disposés au niveau de la tête d'impression et/ou de la tête d'impression à jet d'encre (5) et/ou au niveau du sécheur (14) et/ou entre le sécheur (14) et la ou les têtes d'impression à jet d'encre (5).
  11. Dispositif selon une ou plusieurs des revendications 1 à 10, caractérisé en ce qu'un dispositif de séchage (14) et un dispositif d'aspiration (19) sont installés en aval du dispositif d'impression sans cliché (D), vu dans le sens de transport des feuilles d'impression (B).
  12. Dispositif selon une ou plusieurs des revendications 1 à 10, caractérisé en ce qu'un sécheur (14) est installé en aval du dispositif d'impression sans cliché (D), vu dans le sens de transport des feuilles d'impression, et qu'est associé au sécheur (14) un dispositif de commande par la commande duquel l'effet du rayonnement sécheur sur des zones du support d'impression ou du support d'impression imprimé dynamiquement qui sont exposées au rayonnement sécheur (14) est limité.
  13. Dispositif selon la revendication 12, caractérisé en ce que le sécheur (14) est un sécheur UV à LED et que le dispositif de commande est conçu et raccordé à la commande de la machine d'impression de manière à ce que, par sa commande, un effet du rayonnement sécheur soit interrompu pendant un passage dans le canal du cylindre (3).
EP13727097.1A 2012-05-29 2013-05-29 Imprimante additionnelle dans une presse offset Active EP2855161B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE202012101944 2012-05-29
DE201310209908 DE102013209908A1 (de) 2012-05-29 2013-05-28 Zusatz-Druckeinrichtung in einer Bogendruckmaschine
PCT/EP2013/061055 WO2013178675A1 (fr) 2012-05-29 2013-05-29 Dispositif d'impression supplémentaire dans une presse à feuilles

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EP2855161A1 EP2855161A1 (fr) 2015-04-08
EP2855161B1 true EP2855161B1 (fr) 2019-11-20

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JP (1) JP2015522447A (fr)
CN (1) CN104619507B (fr)
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WO (1) WO2013178675A1 (fr)

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DE202016102026U1 (de) * 2016-04-18 2017-07-20 Cyklop Gmbh Vorrichtung zum Bedrucken eines Packstücks
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Publication number Publication date
CN104619507B (zh) 2017-05-31
WO2013178675A1 (fr) 2013-12-05
CN104619507A (zh) 2015-05-13
DE202013102257U1 (de) 2013-06-12
JP2015522447A (ja) 2015-08-06
EP2855161A1 (fr) 2015-04-08
DE102013209908A1 (de) 2013-12-05

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