EP2855161B1 - Additional printing device in an offset printing amachine - Google Patents

Additional printing device in an offset printing amachine 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
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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)
French (fr)
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EP2855161A1 (en
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/en
Application granted granted Critical
Publication of EP2855161B1 publication Critical patent/EP2855161B1/en
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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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Description

Die Erfindung betrifft eine druckformlose Druckeinrichtung in einer Bogendruckmaschine gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a pressure-formless printing device in a sheet-fed printing machine according to the preamble of claim 1.

In nach dem Offset-Druckprinzip arbeitenden Bogendruckmaschinen finden zunehmend druckformlose Druckeinrichtungen Verwendung, die vorzugsweise der Individualisierung von über den Offsetdruck hergestellten Druckerzeugnissen mit zum Beispiel Adressen, Barcodes, Nummerierungen oder sonstigen Markierungen dient. Derartige druckformlose Druckeinrichtungen werden auch als Non Impact Print (NIP) Einrichtungen bezeichnet. Bekannt sind hierzu Laserdruck-Einrichtungen oder Thermographie-Druckeinrichtungen.In sheet-fed printing presses working according to the offset printing principle, increasingly pressure-free printing devices are used, which preferably serve to individualize printed products produced by offset printing with, for example, addresses, barcodes, numbering or other markings. Such pressure-formless printing devices are also referred to as non-impact print (NIP) devices. For this purpose, laser printing devices or thermographic printing devices are known.

Die NIP-Einrichtungen können zum Beispiel auch als Inkjet-Druckeinrichtungen ausgeführt sein, die über einen oder mehrere Inkjet-Druckköpfe verfügen, wobei diese nach einem beliebigen Inkjet-Prinzip arbeiten kann. Diese Inkjet-Einrichtungen werden für die Verarbeitung von Tinten, die auf Lösungsmittelbasis oder auf Wachsbasis hergestellt sind, Lack oder anderen Beschichtungsmedien verwendet, die sich nach unterschiedlichen Prinzipien drucken (Continouos Inkjet, Drop on Demand) und trocknen lassen (UV-Strahlung, Infrarotstrahlung, Elektronenstrahl, Heißluft, etc.).For example, the NIP devices may also be embodied as inkjet printing devices having one or more inkjet printheads, which may operate on any inkjet principle. These 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.).

Aus der DE 197 04 003 A1 ist eine Bogendruckmaschine bekannt, bei welcher eine als Inkjet-Druckeinrichtung bzw. als Laser-Druckeinrichtung ausgebildete, druckformlose Druckeinrichtung in ein Offsetdruckwerk integriert ist. Dabei ist die druckformlose Druckeinrichtung gegenüber einem bogenführenden Gegendruckzylinder im Bereich nach dem Durchlauf von Druckbogen durch einen von dem Gegendruckzylinder und einem Gummizylinder gebildeten Druckspalt angeordnet. Eine weitere Bogendruckmaschine mit einer in dieselben integrierten, druckformlosen Druckeinrichtung ist aus der DE 195 14 259 A1 bekannt, wobei nach diesem Stand der Technik die druckformlose Druckeinrichtung in Transportrichtung der Druckbogen gesehen nach dem letzten Offset-Druckwerk und vor einem Ausleger der Bogendruckmaschine in dieselbe integriert ist.From the DE 197 04 003 A1 a sheet-fed printing machine is known, 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. In this case, 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.

Aus der DE 10 2009 000 513 A1 ist eine Bogendruckmaschine bekannt. Die Bogendruckmaschine ist mit einem Anleger zum Einschleusen zu bedruckender Druckbogen in die Bogendruckmaschine, mit mehreren Druckwerken und/oder Lackwerken zum Bedrucken der Druckbogen mit einem statischen, für alle Druckbogen identischen Druckbild, mit einem Ausleger zum Ausschleusen bedruckter Druckbogen aus der Bogendruckmaschine, und mit mindestens einer in die Bogendruckmaschine integrierten, druckformlosen Druckeinrichtung versehen. Zum Bedrucken der Druckbogen mit einem insbesondere dynamischen, veränderlichen Druckbild wird eine mehrfarbig arbeitende Inkjet-Druckeinheit im Bereich eines Druckwerkes oder Lackwerkes in die Bogendruckmaschine integriert.From the DE 10 2009 000 513 A1 is a sheetfed press known. 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. For printing the sheet with a particular dynamic, variable print image, a multi-color inkjet printing unit is integrated in the sheet-fed press in the field of a printing unit or coating unit.

Aus der DE 10 2009 003 202 A1 ist eine weitere Bogendruckmaschine bekannt, die mit einem Anleger, mit einem Ausleger und mit mehreren Druckwerken und/oder Lackwerken versehen ist. Die zu bedruckenden Druckbogen werden mit Hilfe von Bogentransferzylindern vom Anleger in Richtung auf den Ausleger durch jedes Druckwerk und/oder jedes Lackwerk transportiert. Mindestens ein Bogentransferzylinder weist mindestens eine Greifeinrichtung für Druckbogen auf, die vollständig innerhalb einer durch eine äußere Umgebungsfläche des Bogentransferzylinders definierten Kontur liegt, wobei mindestens einem dieser Bogentransferzylinder eine Inkjet-Druckeinrichtung derart zugeordnet ist, dass am Bogentransferzylinder geführte Druckbogen mit Hilfe der Inkjet-Druckeinrichtung bedruckbar sind.From the DE 10 2009 003 202 A1 Another sheet-fed printing machine is known, 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.

Aus der EP 2 230 182 B1 ist eine Tintenstrahldruckvorrichtung bekannt. Diese umfasst einen Tintenstrahlkopf mit einer Düsenfläche, in der Tintenstrahldüsen angeordnet sind; und einen Reiniger zum Abstreifen der Düsenfläche. Weiterhin sind eine Vorratsspindel und eine Aufnahmespindel für Rollen eines bandförmigen Abstreifelementes vorhanden. Das Abstreifelement läuft entlang einer vorbestimmten Laufbahn parallel zu der Düsenfläche, wobei es um eine Umfangsfläche einer Andrückrolle geschlungen ist. Führungseinrichtungen führen das Abstreifelement zwischen der Vorratsspindel und der Andrückrolle und zwischen der Andrückrolle und der Aufnahmespindel. Das um die Andrückrolle geschlungene Abstreifelement wird gegen die Düsenfläche angelegt. Die Düsenfläche ist schräg zur Horizontalen und bezüglich der Achsen der Spindeln geneigt angeordnet.From the EP 2 230 182 B1 An ink jet printing device is known. This 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.

Bei derartigen aus dem Stand der Technik bekannten Bogendruckmaschinen sind jeweils druckformlose Druckeinrichtungen Inkjet-Druckeinrichtung fest innerhalb der von Einrichtungen der Druck- oder Bogentransportaggregate integriert, so dass an jeder für eine druckformlose Druckeinrichtung interessanten Einbauposition eine entsprechende druckformlose Druckeinrichtung bereitgehalten werden muss. Dies erhöht den Investitionsbedarf für derartige Bogendruckmaschinen.In such known from the prior art sheet printing 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.

Weiterhin ist aus der US 2011/0132213 A1 eine Vorrichtung und ein Verfahren bekannt, mit dem die Steuerung der Applikation einer Substanz auf ein Substrat gesteuert werden kann. Hierbei wird eine Bedruckstoffbahn über zwei spezielle Führungswalzen dicht an einem anschlaglosen Druckkopf vorbei geführt. Der Druckkopf ist fest mit der Halterung der Führungswalzen verbunden, wobei diese verlagerbar angeordnet ist. Der anschlaglose Druck findet innerhalb der verlagerbaren Bahnführungseinrichtung statt. Die Schwenkbarkeit der Bahnführungseinrichtung dient einer Veränderung des Bahnführungsweges.Furthermore, from the US 2011/0132213 A1 a device and a method with which the control of the application of a substance to a substrate can be controlled. Here, 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.

Weiterhin wird in GB 2 335 887 A eine Einrichtung zum Einsparen von Farbband in einem Thermodrucker mittels Bewegens des Farbbandes durch einen Druckspalt beschrieben. Der Thermodrucker ist als beweglicher Druckkopf gegenüber einer fest stehenden Platte beschrieben, wobei auf der Platte ein Substrat gehaltert ist. Der Druckkopf muss also beweglich sein, um das Arbeitsfeld des Substrats überstreichen zu können. Zur besseren Ausnutzung des Farbbandes wird dieses während dem Drucken durch den Druckspalt bewegt.Furthermore, in GB 2 335 887 A 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.

Hiervon ausgehend liegt der vorliegenden Verbesserung das Problem zugrunde, eine neuartige Inkjet-Einrichtung als Zusatzdruckeinrichtung für eine Bogendruckmaschine nach dem Oberbegriff der Ansprüche 1 und 8 zu schaffen, bei der eine einfachere Handhabung im Zusammenhang mit Aggregaten für einen Offsetdruck oder eine Lackierung integrierten Nutzung an Druckmaschineneinheiten. Dabei soll weiterhin eine sichere Betriebsweise zur Erzeugung qualitativ hochwertiger Inkjet-Drucke ermöglicht werden.On this basis, 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.

Diese Aufgabe wird durch eine Inkjet-Einrichtung für eine Druckmaschine gemäß Anspruch 1 gelöst.This object is achieved by an inkjet device for a printing press according to claim 1.

Erfindungsgemäß ist die druckformlose Druckeinrichtung in der Druckmaschine derart bewegbar und verstellbar angeordnet, dass sie zumindest von der Oberfläche des zugeordneten Zylinders und wenigstens aus dem Arbeitsraum alternativ anwendbarer Beschichtungseinrichtungen entfernbar ist.According to the invention, 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.

Weiterhin wird erfindungsgemäß im Zusammenhang mit der Zuordnung der druckformlosen Druckeinrichtung eine vagabundierende Abstrahlung eines für die Härtung bzw. Trocknung von Inkjet-Drucken auf den Bedruckstoffen genutzten Trockners durch Schottmittel und/oder Steuerungsmaßnahmen an einer Einwirkung auf die Inkjet-Einrichtungen gehindertFurthermore, in accordance with the invention, in connection with the assignment of the pressure-free printing device, 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

Im Sinne der hier vorliegenden Erfindung ist die Druckeinrichtung verschiebbar oder verschwenkbar ausgeführt, so dass diese innerhalb eines Druckwerkes einer Bogendruckmaschine gegenüber einem ihr zugeordneten Zylinder positioniert werden kann. Dazu ist die Druckeinrichtung vorzugsweise auf einer Verstelleinrichtung montiert, mittels derer sie vom zugeordneten, einen Bedruckstoff führenden Zylinder beabstandet werden kann.
Eine Druckeinrichtung ist demnach dann, wenn mit dieser kein Bedrucken der Druckbogen erfolgen soll, an ihrer Einbauposition vom Zylinder abstellbar. Für Reinigungsarbeiten von Druckköpfen der Druckeinrichtung kann der Druckeinrichtung einer Reinigungseinrichtung zugeordnet werden.
Die Druckeinrichtung kann weiterhin zur Durchführung von Wartungs- oder Reinigungsarbeiten so positioniert werden, so dass der Vorgang der Reinigung selbst auf effektive Weise durchgeführt werden kann.
Weiterhin ist vorgesehen, die druckformlose Druckeinrichtung an einem Schwenkmechanismus anzubringen, der eine Arbeitsposition an einem Bogen führenden Gegendruckzylinder und eine Parkposition außerhalb des Arbeitsbereichs des beispielsweise als Lackmodul ausgeführten Druckwerks anfährt.For the purposes of the present invention, 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. For this purpose, 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. For cleaning work of printheads of the printing device, 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.
Furthermore, 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.

Zur Positionierung eines in der druckformlosen Druckeinrichtung enthaltenen Inkjet-Druckkopfes zum Zweck der Inaktivstellung bei Verbleib an der Druckeinrichtung kann eine radial zur Oberfläche des zugeordneten Bogen führenden Zylinders ausgeführte Verlagerung in einer Abstellposition erfolgen.For positioning an ink jet printhead contained in the printing formless printing device for the purpose of inactive position while remaining on the printing device, a displacement carried out radially to the surface of the associated sheet can be effected in a stowed position.

Erfindungsgemäß ist daher für die druckformlose Druckeinrichtung Folgendes vorgesehen:
Die Druckeinrichtung im Druckwerk der Bogendruckmaschine wird auf einer eine Absetzbewegung ausführende Führungseinrichtung gelagert.
Eine Führungseinrichtung erlaubt eine Bewegung zur Positionierung der Druccköpfe parallel zur Achse des Gegendruckzylinders.
Die Druckeinrichtung wird parallel geführt zwischen einer Arbeitsstellung am Gegendruckzylinder und einer Park- oder Wartungsstellung außerhalb eines Einbau-, Wartungs- oder Bedienbereichs eines als Lackmodul verstellt.According to the invention, therefore, the following is provided for the pressure-formless printing device:
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.

Die Schwenkbewegung der Druckeinrichtung kann bei ein- oder ausgebauten Kammerrakeln und Rasterwalzen erfolgen.The pivoting movement of the printing device can be done with built-in and removed chamber doctor blades and anilox rollers.

Jeder Druckkopf der Druckeinrichtung ist an den Führungseinrichtungen in deren Arbeitsposition am Gegendruckzylinder in eine Einschaltstellung oder eine Abschaltstellung positionierbar.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.

Die Druckköpfe sind als Inkjet-Druckkopf ausgebildet.The printheads are designed as inkjet printhead.

Den Druckköpfen sind Abdeckeinrichtungen zugeordnet, die wirksam oder angebracht werden, wenn ein Druckkopf in Abschaltstellung oder die druckformlosen Druckeinrichtung in Wartungs- oder Parkstellung gebracht wird.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.

Der Druckeinrichtung ist in Transportrichtung ein Trockner (14) nachgeordnet ist. Dazu sind Abschirmeinrichtungen zum Fernhalten einer vagabundierenden Trocknerstrahlung von der Düsenfläche vorgesehen.The printing device is downstream of a dryer (14) in the transport direction. For this purpose, shielding devices are provided for keeping a stray dryer radiation away from the nozzle surface.

Abschirmeinrichtungen sind am Druckkopf / Inkjet-Druckkopf und/oder am Trockner und/oder zwischen Trockner (14) und den Inkjet-Druckköpfen angeordnet. Dem Trockner kann eine Absaugeinrichtung zugeordnet sein.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.

Der Trockner steuerbar und im Bereich nicht bedruckter Flächen oder im Zylinderkanal abgeschaltet werden.The dryer can be controlled and switched off in the area of non-printed areas or in the cylinder channel.

Als Trockner kann ein LED-UV-Trockner verwendet werden, der mit der Steuerung der Druckmaschine verbunden ist.The dryer can be an LED UV dryer connected to the press control.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung.Preferred embodiments of the invention will become apparent from the dependent claims and the description below.

Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert.Embodiments of the invention will be described, without being limited thereto, with reference to the drawings.

Dabei zeigt:

Fig. 1:
eine erfindungsgemäße Einrichtung in schematischer Schnittdarstellung in einer Arbeitsposition,
Fig. 2A, 2B:
die erfindungsgemäße Einrichtung in zwei verschiedenen Abstellpositionen,
Fig. 3:
die erfindungsgemäße Einrichtung in Draufsicht,
Fig. 4:
die erfindungsgemäße Einrichtung in frontaler Ansicht und
Fig. 5:
eine weitere erfindungsgemäße Einrichtung in schematischer Schnittdarstellung in einer Arbeitsposition.
Showing:
Fig. 1:
a device according to the invention in a schematic sectional view in a working position,
FIGS. 2A, 2B:
the device according to the invention in two different parking positions,
3:
the device according to the invention in plan view,
4:
the device according to the invention in frontal view and
Fig. 5:
a further device according to the invention in a schematic sectional view in a working position.

Die erfindungsgemäße Einrichtung ist in einer Bogendruckmaschine mit mindestens einer druckformlosen Druckeinrichtung D integriert, die dem Bedrucken der Druckbogen mit einem insbesondere dynamischen bzw. veränderlichen Druckbild oder variablen Bildbestandteilen wie Nummerierungen, Codierungen oder Adressierungen dient. Das Bedrucken der Druckbogen mit dem dynamischen bzw. veränderlichen Druckbild erfolgt dabei vorzugsweise inline zum Bedrucken von Druckbogen mit einem statischen bzw. unveränderlichen Druckbild, das in den Druckwerken bzw. Lackwerken der Bogendruckmaschine gedruckt wird.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.

Die nachfolgende Beschreibung erfolgt in Bezug auf eine mögliche Ausführungsform von druckformlosen Druckeinrichtungen, die jeweils in der Art von Inkjet-Druckköpfen ausgebildet sind. Dies soll insofern die Anwendbarkeit der Erfindung nicht auf Inkjet-Druckeinrichtungen beschränken.
Bei der Benennung von Beschichtungsmedien, die mittels der druckformlosen Druckeinrichtung D verarbeitet werden, werden Begriffe wie Druckfarbe, Farbe, Tinte oder Lack verwendet. Damit sind grundsätzlich immer alle für das druckformlose Beschichten in Form eines Mustereindruckes erforderlichen Beschichtungsmedien umfasst und nicht auf jeweilige Spezialbegriffe beschränkt.The following description will be made as to one possible embodiment of pressure-free printing devices, each of which is formed in the manner of inkjet printheads. This is not intended to limit the applicability of the invention to inkjet printing devices.
When naming coating media that are processed by means of the printing formless printing device D, terms such as printing ink, ink, paint or lacquer are used. Thus, in principle, all the coating media required for printing formless coating in the form of a pattern impression are always included and are not restricted to particular special terms.

Figur 1 zeigt eine schematisierte Darstellung einer erfindungsgemäßen Einrichtung mit einem Umriss eines Druckwerks 1, das als Offsetdruckwerk oder Lackierwerk oder Basismodul einer Bogendruckmaschine ausgebildet sein kann. 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.

Das Druckwerk 1 ist dann auch Teil einer Mehrfarben-Bogendruckmaschine. Darin ist ein einen Bogen führender Gegendruckzylinder 2 mit einem Zylinderkanal 3 und darin zugeordnet einer Greiferanordnung 4 versehen. Diese dargestellte Greiferanordnung 4 dient dazu einen Druckbogen B an dessen in einer Transportrichtung T der Bogendruckmaschine gesehen vorne liegenden Kante zu greifen, zu halten und dabei an der Oberfläche des Gegendruckzylinders 2 durch das Druckwerk 1 zu führen.
Dann, wenn ein Inkjet-Druckkopf 5 in ein Druckwerk 1 oder ein Lackmodul einer Bogenoffsetdruckmaschine integriert ist, ist der Inkjet-Druckkopf 5 jeweils gegenüber einem Bogen führenden Zylinder im Bereich nach dem Durchlauf von Druckbogen durch einen von dem Gegendruckzylinder und einem Gummizylinder gebildeten Druckspalt angeordnet.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.
Then, when 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 ,

Nach Figur 1 ist das Druckwerk 1 als Lackmodul konfiguriert, in dem ein Formzylinder 12 dem Gegendruckzylinder 2 zugeordnet ist. An dem Formzylinder 12 sind eine Auftragwalze 22, die üblicherweise als Rasterwalze ausgebildet ist, und ein Kammerrakel 21 demontierbar angeordnet. Im Folgenden wird das Lackmodul jedoch weiterhin als Druckwerk 1 bezeichnet.After FIG. 1 is the printing unit 1 configured as a paint module in which a forme cylinder 12 is associated with the impression cylinder 2. On the forme cylinder 12 are an applicator roller 22, which is usually designed as an anilox roller, and a chambered doctor blade 21 arranged removable. In the following, however, the paint module is still referred to as printing unit 1.

Im Druckwerk 1 ist dem Gegendruckzylinder 2 ein Inkjet-Druckkopf 5 zugeordnet. Der Inkjet-Druckkopf 5 weist an seiner Unterseite eine Düsenfläche 5.1 mit Düsenreihen oder Düsenarrays auf, aus denen die Drucktinte in den gewünschten Bildmustern ausgestoßen wird.
Der Inkjet-Druckkopf 5 muss gegenüber der Bogen führenden Oberfläche an dem Gegendruckzylinder 2 sehr genau positioniert werden, da der Inkjet-Druckvorgang in seiner Qualität stark von einer in gleichmäßigem und kurzem Abstand zur Bedruckstoffoberfläche gehaltenen Düsenfläche 5.1 abhängig ist.
Weiterhin muss der Inkjet-Druckkopf auch in Breitenrichtung zum Bedruckstoff also parallel zur Achsrichtung des Gegendruckzylinders 2 positioniert werden, um die Lage der dynamischen Eindrucke festlegen zu können.In the printing unit 1, the impression cylinder 2, 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.
Furthermore, 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.

Der Inkjet-Druckkopf 5 ist daher (ggf. mittels eines Antriebes) über eine Führung 6 an einer Traverse 7 in Achsrichtung des Gegendruckzylinders 2 verschiebbar aufgenommen.
Weiterhin ist die Traverse 7 an ihren Enden jeweils mit Halterungen 8 versehen, an denen jeweils obere und untere Gelenkpunkte 8.1 und 8.2 für die gelenkige Aufnahme eines unteren Endes von je einem oberen Lenker 9A und einem unteren Lenker 9B vorgesehen sind.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.

Weiterhin ist der obere Lenker 9A an seinem oberen Ende an einem Gelenkpunkt 9.1 und der untere Lenker 9B ist an seinem oberen Ende an einem Gelenkpunkt 9.2 angeordnet. Die Gelenkpunkte 9.1, 9.2 sind über an beidseitig zum Gegendruckzylinder 2 angeordnete gestellfeste Halterungen 10 gestellfest im Druckwerk 1 angeordnet.Furthermore, 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.

Daher kann die Traverse 7 sowohl in horizontaler Ausrichtung zum Gegendruckzylinder 2 positioniert, als auch radial zum Gegendruckzylinder 2 an- und abgestellt werden.Therefore, 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.

Die Anordnung der oberen und unteren Lenker 9A und 9B bildet wie in Figur 1 dargestellt eine Parallelogrammführung. Daher ist sichergestellt, dass bei einem Schwenkvorgang der Anordnung der Inkjet-Druckkopf 5 stets in senkrechter Ausrichtung positioniert bleibt, so dass es nicht zu unbeabsichtigten Tintenleckagen am Druckkopf kommen kann.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.

Die Anordnung der Druckformlosen Druckeinrichtung D in dem Druckwerk 1 ist so konzipiert, dass dieses effizient nutzbar wird.
Daher kann die Anordnung der Lenker 9A und 9B in einer ersten Variante so vorgesehen sein, dass der Inkjet-Druckkopf 5 bei aus dem Druckwerk bzw. Lackmodul 1 entnommenem Kammerrakel 21 und ausgebauter Rasterwalze 22 in eine sehr dicht am im Druckwerk 1 verbleibenden Formzylinder 12 liegende Arbeitsposition gebracht werden kann.
Weiterhin kann die Anordnung der Lenker 9A und 9B in einer zweiten Variante so vorgesehen sein, dass der Inkjet-Druckkopf 5 bei in dem Druckwerk bzw. Lackmodul 1 verbleibender Rasterwalze 22 und ggf. auch bei im Druckwerk 1 verbleibendem Kammerrakel 21 in eine möglichst eng am im Druckwerk 1 verbleibenden Formzylinder 12 liegende Arbeitsposition gebracht werden kann. Wesentlich ist hierbei, dass der Inkjet-Druckkopf 5 in Arbeitsposition bei idealerweise radialer Zuordnung zum Gegendruckzylinder 2 möglichst vertikal ausgerichtet ist, um eine optimale Druckfunktionalität sicherzustellen.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.

Die Druckformlose Druckeinrichtung D kann dabei, wie im Ausführungsbeispiel gezeigt wird, an in Verbindung mit den Seitenwänden des Druckwerks 1 angeordneten Halterungen 20 (hier nur symbolisch angedeutet) für das Kammerrakel 21 und die Rasterwalze 22 vorbeigeführt werden.
In dieser Arbeitsposition liegt die Anordnung der Traverse 7 samt Halterungen 8 auf gestellfest angeordneten Positionieranschlägen 11 auf. Diese Positionieranschläge 11 können beispielsweise exzentrisch gelagert und so in ihrer Höhenlage gegenüber der Oberfläche des Gegendruckzylinders 2 ausrichtbar sein. Damit kann also der Abstand des Inkjet-Druckkopfes 5 in Relation zum Gegendruckzylinder 2 justiert werden, wobei vorzugsweise ein Minimalabstand des Inkjet-Druckkopfes 5 zur jeweils vorgegebenen Bedruckstoffoberfläche hergestellt wird. Der Abstand ergibt sich aus der Dicke des jeweils verwendeten Bedruckstoffs, wenn ein Druckbogen auf dem Gegendruckzylinder 2 aufliegt.
Es können Mittel vorgesehen sein, um die Druckformlose Druckeinrichtung D in der Anlage an der Traverse 7 und der Halterungen 8 an den Positionieranschlägen 11 zu verriegeln, um die Lage der Inkjet-Druckköpfe 5 in Arbeitsposition zu sichern.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.
In this working position, the arrangement of the traverse 7 including brackets 8 on fixed to the frame arranged positioning stops 11. 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. Thus, therefore, 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.

In Figuren 2A und 2B sind weitere Positionen der Druckformlosen Druckeinrichtung D dargestellt, bei denen die Druckformlose Druckeinrichtung D an den Lenkern 9A, 9B aus der Arbeitsposition am Gegendruckzylinder 2 nach oben im Umfang eines Bewegungsbereiches C abgeschwenkt werden. Der Bewegungsbereich C kann durch entsprechende Konstruktion und Anbringung der Lenker 9A, 9B definiert werden.
Die Figuren 2A und 2B stellen ein mögliches Ausführungsbeispiel dar, bei dem davon ausgegangen wird, das Kammerrakel 21 und Rasterwalze 22 aus dem Druckwerk 1 entnommen werden, wenn die Druckformlose Druckeinrichtung D zum Einsatz kommen soll.
Wie weiter oben ausgeführt können die Druckformlose Druckeinrichtung D und deren Schwenkmechanismus aber auch so konzipiert werden, dass eine Entnahme von Kammerrakel 21 und Rasterwalze 22 nicht zwingend notwendig ist.In 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.
As stated above, however, 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.

Für die Schwenkbewegung kann ein motorischer Antrieb vorgesehen sein, mittels dessen einer oder mehrere der Lenker 9A, 9B einseitig oder beidseitig synchron ausgehend von den gestellfesten Lagerungen in den Lagerpunkten 9.1 und/oder 9.2 geschwenkt werden.
Alternativ ist eine manuelle Bedienung möglich, wobei die Schwenkbewegung dann durch Gewichtsausgleich etwa mittels einer Gasdruckfeder unterstützt werden kann. Zusätzlich kann die Bewegung ausgehend von der Traverse dann durch Mittel zum Ver- und Entriegeln der Lenker 9A, 9B am Druckwerk 1 gesichert werden. Die Ver- und Entriegelung kann dabei durch einen oder mehrere Bremsmechanismen in einem oder mehreren Gelenkpunkten 8.1, 8.2, 9.1 und/oder 9.2 innerhalb des Bewegungsbereiches C der Druckformlosen Druckeinrichtung D stufenlos erfolgenFor the pivoting movement, 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.
Alternatively, a manual operation is possible, wherein the pivoting movement can then be supported by weight balance, for example by means of a gas spring. In addition, 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.

Figur 2A zeigt eine vom Gegendruckzylinder 2 abgehobene Position, in der die Druckformlose Druckeinrichtung D mittels der Lenker 9A, 9B etwa horizontal zu den gestellfesten Halterungen 10 positioniert ist. Eine derartige Position kann verwendet werden, um Wartungsarbeiten während des Druckbetriebes durchzuführen, bei denen ein verbesserter Zugang zu den Inkjet-Druckköpfen 5 und/oder zu deren Düsenflächen 5.1 erforderlich ist. 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.

Figur 2B zeigt die der Arbeitsposition gegenüber liegende Endlage des Schwenkbereichs C der Druckformlosen Druckeinrichtung D. Die Inkjet-Druckköpfe 5 sind nun in ihre obere Endlage geschwenkt, wo die Druckformlose Druckeinrichtung D ebenfalls verriegelt wird. In dieser als Parkposition zu bezeichnenden Lage ist vorgesehen, dass das Druckwerk 1 wieder in seiner Funktion als Lackmodul verwendet wird. Daher sind hier das Kammerrakel 21 und die Rasterwalze 22 wird in ihren Halterungen im Bereich 20 eingesetzt und dem Formzylinder 12 zugeordnet. 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. In this position to be designated as parking position, it is provided that 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.

Die Inkjet-Druckköpfe 5 sind in der Parkposition verschlossen, so dass die Tinte nicht in der Düsenfläche antrocknen kann. Die Düsenfläche ist daher mit einer Abdeckung 5.2 versehen, die für einen dichten Verschluss sorgt und die Düsenfläche auch gegen unbeabsichtigte Berührungen sichert.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.

In Figur 1 ist die Arbeitsposition des Inkjet-Druckkopfes 5 am Gegendruckzylinder 2 dargestellt. Dabei ist der Inkjet-Druckkopf 5 an den Lenkern 9A, 9B manuell oder mittels eines zugeordneten Antriebs bis dicht über die Oberfläche des den Druckbogen B tragenden Gegendruckzylinders 2 gefahren worden. Die, wie hier dargestellt, abgesenkten Greifer der Greifereinrichtung 4 ragen dabei nicht oder nur minimal über die Oberfläche des Druckbogens B, so dass der Inkjet-Druckkopf 5 für eine effektive und exakte Bebilderung mit seiner Düsenfläche 5.1 so weit wie möglich an die zu bedruckende Oberfläche angenähert werden kann. Die austretenden Tintentropfen werden so auf kürzestem Weg und exakt an die gewünschten Bildstellen übertragen.In FIG. 1 the working position of the inkjet print head 5 is shown on the impression cylinder 2. In this case, 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.

In Figur 3 ist die Druckformlose Druckeinrichtung D am Gegendruckzylinder 2 in der Draufsicht gezeigt. Der Formzylinder 12 liegt daher vor dem Gegendruckzylinder 2. Die Lage der Zylinderachsen ist jeweils mit Strichpunktlinien dargestellt, wobei die Achse des Formzylinders 12 mit 12A bezeichnet ist.
Die Lenker 9A ist nun als an den Halterungen 8 am beidseitigen Ende der Traverse 7 angelenkt erkennbar. Dazu sind an den Halterungen 8 an der Traverse 7 die Gelenkpunkte 8.1 vorgesehen.
Der Lenker 9A ist weiterhin an den Halterungen 10 über die Gelenkpunkte 9.1 gestellfest im Druckwerk 1 zugeordnet.
Der Lenker 9B und die Gelenkpunkte 8.2 und 9.2 sind in dieser Darstellungsweise nicht erkennbar.
Im Bereich der Halterungen 8 an der Traverse 7 sind die Positionieranschläge 11 dargestellt. Im Zusammenhang damit sind auch symbolisch die Lagerstellen 20 für das Kammerrakel 21 und die Rasterwalze 22 gezeigt, die oberhalb der Positionieranschläge liegen und an denen die Druckformlose Druckeinrichtung D zur Anstellung an den Gegendruckzylinder 2 vorbeigeführt werden muss.
Weiterhin ist die Lage der Lenker 9A, 9B so gewählt, dass diese beim Anstellen der Druckformlosen Druckeinrichtung D an den Gegendruckzylinder 2 an den seitlichen Stirnflächen des Formzylinders 12 bis in die Nähe von dem Formzylinder 12 stirnseitig zugeordneten Lagerzapfen 13 geführt werden können.In 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. For this purpose, 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.
In the area of the brackets 8 on the traverse 7, the positioning stops 11 are shown. In connection therewith, 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.
Furthermore, 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.

Auf der Traverse 7 sind neben einem Inkjet-Druckkopf 5 an einer Halterung 6 auch zwei weitere Inkjet-Druckköpfe 5 an Halterungen 6 jeweils in strichliierter Darstellung gezeigt. Damit wird klar dass ein oder mehrere Inkjet-Druckköpfe 5 auf der Traverse 7 angeordnet und dort frei positioniert werden können.On the traverse 7 next to an inkjet printhead 5 on a holder 6 and two other inkjet printheads 5 are shown on holders 6 each in dashed lines. This makes it clear that one or more inkjet printheads 5 can be arranged on the traverse 7 and freely positioned there.

In Figur 4 ist die Druckformlose Druckeinrichtung D am Gegendruckzylinder 2 in frontaler Ansicht gezeigt. Die Druckformlose Druckeinrichtung D mit dem Inkjet-Druckkopf 5 ist hierbei in ihrer Arbeitsposition nahe am Gegendruckzylinder 2 dargestellt.
Die Lage des Formzylinders 12 ist durch die Lage von dessen Achse 12A gekennzeichnet. Der Formzylinder 12 liegt in dieser Sicht also teilweise hinter dem angeschnitten dargestellten Gegendruckzylinder 2.
Die Traverse 7 liegt hier also parallel zur Erstreckung des Gegendruckzylinders 2. Dargestellt ist auch die Verbindung der Traverse 7 über die Halterungen 8 und die Gelenkpunkte 8.1, 8.2 mit den Lenkern 9A und 9B. Die Lenker 9A und 9B sind in der dargestellten Arbeitsposition links und rechts seitlich der Arbeitsfläche des Formzylinders 12 nahe an dessen Zylinderzapfen 13 angeordnet.
Weiterhin sind auch die oberen Gelenkpunkte 9.1 und 9.2 an den gestellfesten Halterungen 10 sowie die unteren Lenker 9B gezeigt, da der obere Lenker 9A im oberen Bereich weggeschnitten ist.In 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. Also shown is the connection of the traverse 7 on the brackets 8 and the hinge points 8.1, 8.2 with the links 9A and 9B. 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.
Furthermore, 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.

In Figur 4 ist die Anbringung von zwei Inkjet-Druckköpfen 5 an der Traverse 7 dargestellt. Der rechts dargestellte Inkjet-Druckkopf 5 ist in Arbeitsstellung am Gegendruckzylinder 2 positioniert.
Der links dargestellte Inkjet-Druckkopf 5 ist in einer inaktiven Stellung geschaltet, indem der Inkjet-Druckkopf 5 an seiner auf der Traverse 7 angeordneten Halterung 6 nach oben in eine Abschaltposition gerückt wurde. Diese Funktion ist dann von besonderem Vorteil, wenn mehrere Inkjet-Druckköpfe 5 auf der Traverse 7 angeordnet sind, aber für einen Druckauftrag nicht alle Druckköpfe benötigt werden, aber die Inkjet-Druckköpfe 5 ständig im Druckwerk 1 verbleiben sollen.In 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.

Hierzu kann zwischen Inkjet-Druckkopf 5 und Halterung 6 eine geeignete (hier nicht dargestellte) Schiebemechanik eingesetzt werden, auf der der Inkjet-Druckkopf 5 zwischen zwei Raststellungen in Einschaltposition (siehe rechts dargestellter Inkjet-Druckkopf 5) und Abschaltposition (siehe links dargestellter Inkjet-Druckkopf 5) gegenüber der jeweiligen Halterung 6 und damit auch der Traverse 7 verschiebbar ist.
Bei der Ausbildung sowohl der Vorrichtung der Schwenkmechanik des Parallellenker-Mechanismus für die Druckformlose Druckeinrichtung D als auch der Vorrichtung der Schiebemechanik für jeden Inkjet-Druckkopf 5 ist sicherzustellen, dass die Arbeitsposition eines Inkjet-Druckkopfes 5 in Bezug auf die Oberfläche des Gegendruckzylinders 2 genau und schwingungsfrei bzw. schwingungsarm festgelegt werden kann.
Damit die Düsenfläche 5.1 des Inkjet-Druckkopfes 5 in der Abschaltposition nicht verschmutzt bzw. eintrocknet, wird auf den Bereich der Düsenfläche 5.1 ein Verschluss 5.2 aufgesetzt. Der Verschluss 5.2 ist so ausgebildet, dass er ein Verschieben des Inkjet-Druckkopfes 5 in Einschaltposition bei aufgesetztem Verschluss 5.2 verhindert.
Der Verschluss 5.2 kann als automatisch einrastende Abdeckung ausgebildet sein, die bei Verschiebung des Inkjet-Druckkopfes 5 in die Abschaltstellung aus einem Bereich nahe der Düsenfläche 5.1 selbsttätig vom Inkjet-Druckkopf 5 oder dessen Halterung 6 aus vor die Düsenfläche 5.1 eingeschoben, eingefahren oder eingeklappt werden kann.For this purpose, 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.
In the formation of both 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.
So that the nozzle surface 5.1 of the inkjet printing head 5 does not become dirty or dry in the switch-off position, 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.

Der Schwenkmechanismus der druckformlosen Druckeinrichtung D nach den Figuren 1, 2 und 5The pivoting mechanism of the pressure-formless printing device D according to FIGS. 1, 2 and 5

Jeder Inkjet-Druckkopf 5 ist mit einer versorgungsseitigen, also mechanisch oder tintenseitig, sowie einer steuerungsseitigen, also elektrisch oder elektronisch ausgeprägten Schnittstelle versehen. Über die Schnittstelle kann der Inkjet-Druckkopf 5 an eine Halterung, ein Tintenversorgungssystem sowie eine Steuerungseinrichtung der jeweiligen Bogendruckmaschine angeschlossen werden. Hierdurch wird eine leichte Demontierbarkeit sowie Montierbarkeit des Inkjet-Druckkopfes 5 an einer Einbauposition einer Bogendruckmaschine gewährleistet.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.

Wenn vorgesehen ist, dass an mehreren Einbaupositionen Inkjet-Druckköpfe 5 in eine Bogendruckmaschine integriert werden sollen, so können die versorgungsseitigen, nämlich mechanischen bzw. tintenseitigen, Schnittstellen sowie die steuerungsseitigen, nämlich die elektrischen bzw. elektronischen Schnittstellen für diese Inkjet-Druckköpfe 5 zentralisiert sein. Sämtliche in eine Bogendruckmaschine integrierten Inkjet-Druckköpfe 5 sind vorzugsweise über eine zentrale Tintenversorgungseinrichtung und an eine zentrale Steuerungseinrichtung angeschlossen. Es sind auch dezentrale und mobile Tintenversorgungseinrichtungen sowie Steuerungseinrichtungen für die Inkjet-Druckköpfe 5 möglich.If it is provided that 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.

Jedem Inkjet-Druckkopf 5 oder jeder Druckformlosen Druckeinrichtung D mit mehreren Inkjet-Druckköpfen 5 ist vorzugsweise ein eigenes Steuerungspult zugeordnet, um Steuerungsaufgaben und Wartungsarbeiten an den Inkjet-Druckköpfen 5 unabhängig von der Bogendruckmaschine ausführen zu können.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.

Die benötigte Anzahl an Druckköpfen der druckformlosen Druckeinrichtung D kann auch in Transportrichtung der Druckbogen variiert werden. Funktionell wird eine solche Anordnung dadurch bestimmt, dass eine gewünschte Druckgeschwindigkeit größer sein kann als dies die Leistungsfähigkeit eines Inkjet-Druckkopfs 5 bei gegebene Druckgeschwindigkeit erlaubt, so dass die gewünschten Muster nicht vollständig gedruckt werden könnten. Weiterhin kann es erforderlich sein, dass mehrere Druckfarben bzw. Tinten oder auch unterschiedliche Beschichtungsmedien auf die Druckbogen mit Hilfe von Inkjet-Druckköpfen 5 aufgetragen werden sollen.
Schließlich wird die Anzahl an Inkjet-Druckköpfen 5 in Transportrichtung der Druckbogen durch die gewünschte Druckauflösung in Relation zur gegebenen Druckauflösung des verwendeten Druckkopfs definiert, in der Art, dass eine maximale Druckgeschwindigkeit erreicht wird, indem verschiedene Inkjet-Druckköpfe 5 nacheinander jeweils einander ergänzende Teile von Bildmustern drucken. Damit wird die Anforderung an die Druckleistung, die hinsichtlich der Auflösung eines Bildes durch die Folgefrequenz der Tintentropfen bestimmt ist für jeden Druckkopf halbiert und die Druckgeschwindigkeit kann entsprechend angehoben werden.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.

Zur Sicherstellung der Druckqualität ist weiterhin erforderlich, dass das mit der druckformlosen Druckeinrichtung D hergestellte variable Bild innerhalb der Druckmaschine gegen Beschädigungen zu sichern. Dies ist insbesondere bei Inkjet-Einrichtungen notwendig, da die Inkjet-Tinten systembedingt niedrige Viskosität aufweisen und daher zunächst sehr berührungs- und bewegungsempfindlich sind. Aus diesem Grund ist eine möglichst umgehende Trocknung des variablen Bildes von großer Bedeutung.In order to ensure the print quality, 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.

Im Zusammenhang mit druckformlosen Druckeinrichtungen können unterschiedliche Trocknungsverfahren zum Einsatz kommen.
Von besonderem Vorteil sind UV-Systeme. Hierbei werden UV-reaktiv härtbare Tinten oder Beschichtungsmedien verwendet, die dann mit einem UV-Strahler behandelt werden. UV-Strahler werden aktuell häufig als LED-Strahler ausgeführt, die variabel ansteuerbar sind.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.

Weiterhin können auch konventionelle Systeme verwendet werden, bei denen lösemittelbasierte Tinten oder Beschichtungsmedien mittel Infrarot- oder Heißlufttrocknung behandelt werden.Furthermore, conventional systems can also be used in which solvent-based inks or coating media are treated by means of infrared or hot-air drying.

Grundlage für die erfindungsgemäße Lösung ist eine sehr schnelle Trocknung und demgemäß die möglichst dicht am Druckort anzuordnende Trockungseinrichtung.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.

Das nachfolgende Ausführungsbeispiel bezieht sich auf ein UV-System.The following embodiment relates to a UV system.

In Figur 5 ist in einer Darstellung gemäß Figur 1 zusätzlich zur Inkjet-Druckeinrichtung D eine Trockungseinrichtung 14 gezeigt. Dabei wird in Transportrichtung der Druckbogen B gesehen dem bzw. den Inkjet-Druckköpfen 5 vorzugsweise eine Trocknungseinrichtung bzw. Härtungseinrichtung und/oder eine Absaugeinrichtung 19 nachgeordnet.
Die Trocknungseinrichtung 14 dient dazu, die mittels des bzw. der Inkjet-Druckköpfe 5 aufgetragene Druckfarbe zu trocknen bzw. zu härten. Die Inkjet-Tinte ist relativ dünnflüssig und schlägt bei den hohen Druckgeschwindigkeiten der Druckmaschine nicht schnell genug weg.
Zusätzlich kann eine Absaugeinrichtung 19 dem Absaugen von Lösungsmitteldämpfen oder aus UV-Strahlung resultierenden Zersetzungsprodukten der Luft oder der über den Inkjet-Druckkopf 5 aufgetragenen Tinte oder des Beschichtungsmediums dienen.In FIG. 5 is in a representation according to FIG. 1 in addition to the inkjet printing device D, a drying device 14 is shown. In this case, 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.
In addition, 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.

Wenn in einer Bogendruckmaschine einem oder mehreren Inkjet-Druckköpfen 5 Trockner nachgeordnet sind, ist vorgesehen, die Trocknerstrahlung von dem bzw. den Inkjet-Druckköpfen 5 abzuschirmen, damit die Resttinte auf der Düsenfläche 5.1 nicht angetrocknet wird und so der Druckvorgang behindert und dadurch die Druckqualität verschlechtert wird.
Dazu ist in Figur 5 eine ganze Reihe von Einrichtungen dargestellt, die alle der Trocknung und gleichzeitig der Sicherung der Funktionsfähigkeit des Inkjet-Druckkopfes dienen. Diese Einrichtungen sind alle in Verbindung mit einem Trockner 14 zu sehen, der dem Gegendruckzylinder 2 in Transportrichtung T nach dem Inkjet-Druckkopf 5 zugeordnet ist. Dieser Trockner ist bevorzugt als UV-Trockner ausgebildet, so dass für den Druckbetrieb auch UV-Tinte in dem Inkjet-Druckkopf 5 verwendet werden wird.If 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.
This is in 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.

Zunächst ist an dem Inkjet-Druckkopf 5 eine erste Abschirmeinrichtung 15 angebracht. Sie ist so montiert, ausgebildet und aus einem solchen Material und/oder mit einer solchen Oberfläche ausgestattet, dass die Abschirmeinrichtung 15 Trocknerstrahlung des Trockners 14 gut absorbiert oder reflektiert und so daran hindert in den Bereich der Düsenfläche 5.1 des Inkjet-Druckkopfes 5 zu gelangen.First, 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.

Weiterhin ist an der dem Inkjet-Druckkopf 5 zugewandten Seite des Trockners 14 eine zweite Abschirmeinrichtung 18 angebracht. Sie ist so montiert, ausgebildet und aus einem solchen Material und/oder mit einer solchen Oberfläche ausgestattet, dass die Abschirmeinrichtung 15 Trocknerstrahlung des Trockners 14 gut absorbiert oder reflektiert und so daran hindert in den Bereich des Inkjet-Druckkopfes 5 oder in den Bereich der Düsenfläche 5.1 des Inkjet-Druckkopfes 5 zu gelangen.Furthermore, 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.

Weiterhin ist eine radial zum Gegendruckzylinder 1 ausgerichtete Schotteinrichtung als dritte Abschirmeinrichtung 16 im Bereich zwischen dem Inkjet-Druckkopf 5 und dem Trockner 14 angeordnet. Damit werden aus dem Trockner 14 austretende Strahlungen gehindert in den Bereich des Inkjet-Druckkopfes 5 zu gelangen. In Verbindung mit der Abschirmeinrichtung 16 kann eine Bogenführungseinrichtung 17 vorgesehen sein, die als Schutz gegen ein unbeabsichtigtes Umschlagen des Bogenendes des Druckbogens B dient. In Verbindung mit der Bogenführungseinrichtung 17 kann eine pneumatische Beaufschlagung des Druckbogens B erfolgen, in dem dort eine Blaslufteinrichtung vorgesehen wird.Furthermore, a radially directed to the impression cylinder 1 Schotteinrichtung is arranged as a third shielding 16 in the area between the inkjet printhead 5 and the dryer 14. Thus, radiation leaving the dryer 14 is prevented from entering the area of the inkjet print head 5. In conjunction with the shielding device 16, 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. In conjunction with the sheet guiding device 17, a pneumatic impingement of the printed sheet B take place, in which there is provided a blast air device.

Neben derartigen mechanischen Schutzreinrichtungen gegen die vom Trockner 14 ausgehende Strahlungswirkung wird auch noch die gezielte Steuerung des Trockners 14 hinsichtlich der Einwirkzeit vorgesehen.
Insbesondere beim Durchlaufen des Zylinderkanals 3 unter dem Trockner 14 ist vorgesehen, den Trockner 14 herunterzufahren oder ganz auszuschalten. Dies ist mit modernen sehr schnell schaltbaren LED-Trocknern für UV-Strahlung möglich.In addition to such mechanical protection devices against the radiant effect emanating from the dryer 14, the targeted control of the dryer 14 with regard to the exposure time is also provided.
In particular, 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.

Weiterhin kann mit einem solchen LED-Trockner auch die Trocknerwirkung auf die dynamisch bedruckten Formatbereiche begrenzt werden.Furthermore, with such an LED dryer and the dryer effect can be limited to the dynamic printed format areas.

Zur Sicherstellung der Druckqualität kann in Verbindung mit dem druckformlosen Drucksystem eine Überwachungseinrichtung in Form einer Inspektionsanlage vorgesehen sein. Hierin ist eine Kamera 30 vorgesehen, die in Verbindung mit dem Inkjet-Druckkopf 5 an der Traverse 7 angebracht ist. Die Kamera 30 kann als Zeilenkamera ausgeführt sein und richtet einen Abtaststrahl 31 direkt auf den Druckbereich des Druckbogens B in Bogentransportrichtung T hinter dem Inkjet-Druckkopf 5. Aus diesem Bereich wird das Druckergebnis aufgenommen und danach in einem Speicher abgelegt.
Eine Voraussetzung für ein möglichst exaktes Arbeiten der Inspektionseinrichtung ist eine ausreichende Ausleuchtung des Abtastbereiches der Kamera 30. Hierzu können spezielle Beleuchtungseinrichtungen vorgesehen sein.To ensure print quality, a monitoring device in the form of an inspection system can be provided in connection with the pressure-free printing system. Herein, 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.

Eine mit der Kamera 30 und der Maschinensteuerung bzw. der Steuerung der druckformlosen Druckeinrichtung D verbundene Steuerungseinrichtung der Inspektionsanlage bereitet das am Druckbogen B abgetastete Bild auf und stellt es in einem Speicher für einen Qualitätsvergleich zur Verfügung.
Der Vergleich kann wahlweise den Inhalt hinsichtlich von gedruckten und erkennbaren Zeichen betreffen und diesen digital mit einer die entsprechenden digitalen Zeichen enthaltenden Vorlage abgleichen. Andererseits kann die Einrichtung auch ausgeführt sein, um einen Bildvergleich mit einer digitalen Bildvorlage ausführen zu können.
Aus den Vergleichsoperationen ergeben sich Hinweise für die Verwendbarkeit der angefertigten Drucke. Hierbei kann nach absoluter Fehlerfreiheit oder relativer Fehlerfreiheit unterschieden werden.
Beim Bildvergleich wird das Ergebnis sich an dem Bildaufbau und dessen Qualität sowie Farbigkeit und Fehlstellen orientieren.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. On the other hand, 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 colourfulness and defects.

Beim Zeichenvergleich wird der ggf. sicherheitsrelevante Inhalt mit einem Speicherinhalt abgeglichen, so dass erforderlich Daten identifiziert werden.
In beiden Fällen kann davon ausgegangen werden, dass der Bildinhalt wichtige und weniger wichtige Bereich aufweist, die bei der Bewertung unterschieden werden können.During the character comparison, the possibly security-relevant content is compared with a memory content, so that required data is identified.
In both cases it can be assumed that the image content has important and less important areas that can be distinguished in the evaluation.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Druckwerk, LackmodulPrinting unit, paint module
22
GegendruckzylinderImpression cylinder
2A2A
Achse des GegendruckzylindersAxis of the impression cylinder
33
Zylinderkanalcylinder gap
44
Greifergrab
55
Druckkopf, Inkjet-DruckkopfPrinthead, inkjet printhead
5.15.1
Düsenflächedie face
5.25.2
Düsenabdeckungnozzle cover
66
Halterung / FührungBracket / guide
77
Traverse, FührungseinrichtungTraverse, guide device
88th
Halter zur Anlenkung der TraverseHolder for the articulation of the traverse
8.18.1
oberes Gelenk / TraverseUpper joint / Traverse
8.28.2
unteres Gelenk / Traverselower joint / traverse
99
Parallellenker, FührungseinrichtungParallel link, guide device
9.19.1
oberes Gelenk, gestellfeste AnlenkungUpper joint, frame-fixed linkage
9.29.2
unteres Gelenk, gestellfeste Anlenkunglower joint, frame-fixed linkage
9A9A
oberer Lenkerupper handlebar
9B9B
unterer Lenkerlower handlebar
1010
gestellfeste Halterungfixed frame bracket
1111
Anschlag ArbeitsstellungStop working position
1212
Formzylinderform cylinder
12A12A
FormzylinderachseForm cylinder axis
1313
Lagerzapfen FormzylinderBearing Cylinder
1414
Trocknerdryer
1515
Abschirmungshielding
1616
Abschirmungshielding
1717
Bogenführungbowing
1818
Abschirmungshielding
1919
Absaugungsuction
2020
Befestigungsmittelfastener
2121
Kammerrakelchambered doctor blade
2222
Rasterwalzeanilox roller
3030
Inspektionssysteminspection system
3131
Messstrahlmeasuring beam
TT
Transportrichtungtransport direction
BB
Druckbogen / BogenSheet / bow
CC
Schwenkbereichswivel range
DD
druckformlose Druckeinrichtungpressure-free printing device

Claims (13)

  1. A device for printing printed sheets (B) by means of a printing forme-free printing device (D) in a sheet-fed printing press comprising at least one printing unit (1), in which a sheet-guiding impression cylinder (2) is provided, wherein one or a plurality of print heads (5) are each arranged opposite the surface of the impression cylinder (2), which guides a sheet,
    the printing forme-free printing device (D) is arranged in one of the printing units (1) of the sheet-fed printing press on a guide device (9), which performs a set-down movement,
    wherein the printing forme-free printing device (D) can be integrated into the sheet-fed printing press at a guide device, which performs a movement, which has at least one radial component, to the impression cylinder (2), and can be positioned on the impression cylinder (2) opposite the sheet-guiding surface,
    characterized in
    that the printing forme-free printing device (D), in combination with a guide device (9), which is configured as parallelogram guide, can be integrated into the sheet-fed printing press for performing a swing-in and swing-out movement relative to the surface of the impression cylinder (2).
  2. The device according to claim 1, characterized in that the printing forme-free printing device (D) is provided with a guide device (7), which allows for a movement for positioning the print heads (5) parallel to the axis (2A) of the impression cylinder (2).
  3. The device according to claim 1 to 2, characterized in that the printing forme-free printing device (D) can be integrated into the sheet-fed printing press on a guide device (9), which performs a parallel-guiding pivoting movement from an operating position on the impression cylinder (2) into a park or maintenance position outside of an installation or maintenance or operating area of ink or lacquer delivery devices of a printing unit (1) configured as lacquer module.
  4. The device according to one or a plurality of claims 1 to 3,
    characterized in
    that the printing forme-free printing device (D), in combination with a guide device (9), which is configured as parallelogram guide, can be integrated into the sheet-fed printing press for performing a swing-in and swing-out movement in a printing unit (1), which is configured as lacquer module.
  5. The device according to claim 4, characterized in
    that the printing forme-free printing device (D), in combination with a guide device (9), which is configured as parallelogram guide, can be integrated into the sheet-fed printing press, for performing a swing-in and swing-out movement in the printing unit (1), which is configured as lacquer module, in the case of installed chamber doctor (21) and installed screen roller (22) or in the case of removed chamber doctor (21) or in the case of removed chamber doctor (21) and removed screen roller (22).
  6. The device according to one or a plurality of claims 1 to 5,
    characterized in
    that the or each print head (5) of the printing forme-free printing device (D) can be integrated into the sheet-fed printing press at the guide devices (7, 9) in such a way that the or each print head (5) can be positioned into a turn-on position assigned to the impression cylinder (2) or into a turn-off position pulled back from the impression cylinder (2), on the guide device (9) in the operating position thereof.
  7. The device according to one or a plurality of claims 1 to 6,
    characterized in
    that the or each print head (5) is configured as inkjet print head.
  8. The device according to one or a plurality of claims 1 to 7,
    characterized in
    that the or each print head or inkjet print head (5) is provided with a cover device (5.2), which becomes effective when the inkjet print head (5), in operating position of the printing forme-free printing device (D), is brought into turn-off position on its holder (6), or when the printing forme-free printing device (D) is brought into a maintenance or park position, which is located at a distance from the operating position on the impression cylinder (2) of the printing unit (1).
  9. A sheet-fed printing press according to one or a plurality of claims 1 to 8,
    characterized in
    that a drying device (14) is arranged downstream from the printing forme-free printing device (D), viewed in the transport direction of the printed sheets (B), and that shielding devices (15; 16; 17; 18) are provided for keeping a straying dryer radiation away from the nozzle surface (5.1).
  10. The sheet-fed printing press according to claim 9,
    characterized in
    that the shielding devices (15; 16; 17; 18) for keeping a straying dryer radiation away from the nozzle surface (5.1), are arranged on the print head / inkjet print head (5) and/or on the dryer (14) and/or between the dryer (14) and the inkjet print head or heads (5), respectively.
  11. The sheet-fed printing press according to one or a plurality of claims 1 to 10,
    characterized in that a drying device (14) and a suction device (19) are arranged downstream from the printing forme-free printing device (D), viewed in the transport direction of the printed sheets (B).
  12. The sheet-fed printing press according to one or a plurality of claims 1 to 10,
    characterized in that a dryer (14) is arranged downstream from the or each printing forme-free printing device (D), viewed in the transport direction of the printed sheets, and that a control device is assigned to the dryer (14), by means of the controller of which the impact of the dryer radiation on areas of the printing material or of the dynamically printed printing material, which are subjected to the radiation of the dryer (14), is limited.
  13. The sheet-fed printing press according to claim 12,
    characterized in that the dryer (14) is an LED-UV dryer and that the control device is configured and is connected to the controller of the printing press in such a way that an impact of the dryer radiation is interrupted during a pass of the cylinder duct (3) by means of the controller of said printing press.
EP13727097.1A 2012-05-29 2013-05-29 Additional printing device in an offset printing amachine Active EP2855161B1 (en)

Applications Claiming Priority (3)

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DE202012101944 2012-05-29
DE201310209908 DE102013209908A1 (en) 2012-05-29 2013-05-28 Additional printing device in a sheetfed press
PCT/EP2013/061055 WO2013178675A1 (en) 2012-05-29 2013-05-29 Additional printing device in a sheet-fed printing press

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

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JP (1) JP2015522447A (en)
CN (1) CN104619507B (en)
DE (2) DE202013102257U1 (en)
WO (1) WO2013178675A1 (en)

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JP2015522447A (en) 2015-08-06
CN104619507B (en) 2017-05-31
WO2013178675A1 (en) 2013-12-05
DE102013209908A1 (en) 2013-12-05
CN104619507A (en) 2015-05-13
EP2855161A1 (en) 2015-04-08
DE202013102257U1 (en) 2013-06-12

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