EP3946949B1 - Druckmaschine und verfahren zur herstellung von druckprodukten - Google Patents

Druckmaschine und verfahren zur herstellung von druckprodukten Download PDF

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Publication number
EP3946949B1
EP3946949B1 EP20712880.2A EP20712880A EP3946949B1 EP 3946949 B1 EP3946949 B1 EP 3946949B1 EP 20712880 A EP20712880 A EP 20712880A EP 3946949 B1 EP3946949 B1 EP 3946949B1
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EP
European Patent Office
Prior art keywords
substrate
electrode
printing
cooling cylinder
printing press
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
EP20712880.2A
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German (de)
English (en)
French (fr)
Other versions
EP3946949A1 (de
Inventor
Axel Siemer
Helmut Endres
Manfred Kohrmann
Roman RAUHOFER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koenig and Bauer AG
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Koenig and Bauer AG
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Filing date
Publication date
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Publication of EP3946949A1 publication Critical patent/EP3946949A1/de
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F11/00—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination
    • B41F11/02—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination for securities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/005—Electrostatic holding down devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0476—Cooling
    • B41F23/0479—Cooling using chill rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0483—Drying combined with cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2200/00—Printing processes
    • B41P2200/40—Screen printing

Definitions

  • the invention relates to a printing machine, in particular a security printing machine, and a method for producing printed products, in particular securities or intermediate securities products, according to the preamble of claim 1 or 13.
  • a screen printing machine which has a device for aligning magnetic or magnetizable particles contained in the printing ink or the paint in the substrate path downstream of a screen printing unit.
  • This comprises a cylinder with a plurality of elements on the circumference that cause a magnetic field and a dryer directed towards the transport path in the area of the cylinder.
  • a further dryer for final drying is preferably provided downstream in the substrate path.
  • the EP 3 130 468 A2 discloses a combination printing machine with a first printing unit comprising numbering printing units and with varnishing devices for varnishing on both sides. The coated side is then dried by UV radiation.
  • a transfer drum following the two-sided painting can be designed as a cooling roller, in another variant as an inspection cylinder.
  • EP 2 574 463 B1 discloses a sheet-fed offset press and a Flexographic printing machine with at least one printing unit having an inkjet print head, in which the printed sheet is pressed onto the impression cylinder by electrostatic forces after it has first been placed on the impression cylinder by a pressure roller. For support, a blast of air is directed into the nip between the impression cylinder and the pressure roller.
  • the EP 1 795 347 A2 relates to the chill roll stand of a web-fed printing press, with an impression roller being provided on one of the chill rolls, by means of which the web is pressed against the chill roll.
  • the impression roller acts as an electrode to which DC voltage is applied and forms an electric field between itself and the cooling roller.
  • the EP 2 100 736 A1 discloses a cooling cylinder downstream of a work station in which film is applied to substrate sheets DE 10 2015 205 066 A1 a rotary body that can be adjusted against a counter-pressure cylinder, which can be designed in one version for cooling, and the DE 10 2008 001 165 A1 an electrode provided on the periphery of a printing cylinder.
  • the invention is based on the object of creating a printing machine, in particular a security printing machine, and a method for producing printed products, in particular securities or intermediate products of securities.
  • the advantages that can be achieved with the invention are, in particular, that further processing of z. B of the products present as intermediate products, in particular printed products, is possible without a longer idle time and/or without problematic blocking.
  • the printed products should also be understood to mean the intermediate products to be further processed.
  • the solution according to the invention ensures good heat transfer even for high machine speeds ensured and thus the above-mentioned avoidance of longer idle times and/or problematic blocking, e.g. B. to ensure higher machine speeds.
  • the substrate is repeatedly printed and treated in several successive steps. For example, if the substrate is to be printed again, it is of particular advantage if the substrate is in a state where it can be treated in the next unit as quickly as possible. For example, after printing the substrate in the screen printing process z. B. later printing in a machine with one or more numbering printing units with alphanumeric character strings - z. B. in high relief or letterset - are printed.
  • a particularly good heat transfer for cooling the substrate is achieved by the substrate clinging to its entire surface, based on electrostatic forces, on a stationary or preferably co-moving cooled supporting and/or guiding surface of a guiding and/or transport means guiding and/or conveying the substrate, in particular the Lateral surface of a rotating means of transport intended for cooling, e.g. B. a cooling cylinder achieved.
  • a printing machine comprises such a guide and/or transport means, which is to be provided in particular behind the last printing position, guides and/or conveys the substrate and has a stationary or preferably co-moving cooled or coolable support and/or guide surface, in particular a rotating transport means, e.g. B. a transport cylinder designed, for example, as a cooling cylinder, with at least one peripheral section to be cooled from the inside by coolant, over which the substrate is transported from a point at which the substrate runs onto the transport means to a point at which the substrate again separates from the lateral surface of the means of transport runs, is guided and/or promoted.
  • a rotating transport means e.g. B. a transport cylinder designed, for example, as a cooling cylinder, with at least one peripheral section to be cooled from the inside by coolant, over which the substrate is transported from a point at which the substrate runs onto the transport means to a point at which the substrate again separates from the lateral surface of the means of transport runs, is guided and/or promoted.
  • the substrate sheet is taken over by the rotating transport means from an upstream transport means in the area of the accumulation point and the sheet is discharged or transferred to a subsequent transport means in the area of the discharge point.
  • an electrode directed towards the substrate path is arranged in such a way that when electrical voltage is applied, in particular operating voltage, substrate guided past the electrode on the substrate path, in particular a substrate sheet guided past the electrode, can be electrostatically charged or is charged.
  • electrical voltage in particular operating voltage
  • substrate guided past the electrode on the substrate path in particular a substrate sheet guided past the electrode
  • a further one of this type can be placed on the substrate path on the cylinder circumference, spaced downstream in the circumferential direction directed electrode may be provided.
  • the printing machine is designed as a securities printing machine and/or as a sheet-fed printing machine processing a sheet-shaped substrate.
  • Printing press 01 for producing printed products or intermediate printed products, in particular securities or intermediate securities products, such as preferably sheets with printed images of banknotes on a substrate 02, e.g. a web or sheet of printing material 02, comprises a printing material template 03, e.g. a roll unwinder or preferably a sheet feeder 03, at least one application unit 04 embodied as a printing unit 04, through which coating means, e.g. As ink or paint, at least one application point, z. B. pressure point, on at least a first side of the substrate 02, z. g.
  • coating means e.g. As ink or paint
  • the printing substrate 02 can be applied over the entire surface or in partial areas in the form of printed image elements, as well as at least one product receptacle 05, for receiving the printing substrate 02, e.g. g. a rewinder in the case of web-type printing material 02 or a stack delivery 05 in the preferred case of sheet-type printing material 02 (see, e.g. 1 ).
  • optically variable coating material e.g. B. optically variable Printing ink or paint
  • at least one application point, z. B. pressure point, on at least a first side of the substrate 02, z. B. the printing material 02, can be applied over the entire surface or in partial areas in the form of printed image elements.
  • a device for aligning 07 the particles contained in the optically variable coating medium applied to the substrate 02 and responsible for the optical variability is provided in the substrate path between the application device 04 and the product holder 05.
  • This alignment device 07 is also referred to below as alignment device 07 for short.
  • the particles responsible for the optical variability are here in the coating agent, e.g. B. the printing ink or paint, magnetic or magnetizable, non-spherical particles, z. B. pigment particles, hereinafter referred to as magnetic flakes.
  • At least one cooling device 09 is provided in the substrate path, e.
  • This cooling device 09 can be part of a device 06 for conditioning the printed substrate 02, or conditioning device 06 for short, which, in addition to the cooling device 09, has one or more drying and/or hardening devices 08; 34 included.
  • the cooling device 09 or conditioning device 06 is preferably arranged downstream of it in the substrate path.
  • the cooling device 09 or conditioning device 06 is also located in the substrate path between this first printing unit 04 and the Product recording 05 provided.
  • a conditioning device 06 for conditioning the substrate 02 can also be installed between the printing unit 04 of the first type and a printing unit of another type and/or between the - e.g. B. the the last printing unit of the machine - printing unit of another type and the product receptacle 05 can be provided.
  • the printing unit 04 of the first type can be a printing unit 04 with one or more printing units that are processed using the offset process, a printing unit with one or more printing units that are processed using the gravure printing process, in particular the intaglio process, or preferably one Printing unit 04 with one or more printing units 11 using the screen printing method; 12 act.
  • the printing unit of the second type can be a printing unit with one or more printing units that use the gravure printing method, in particular the intaglio method, a printing unit with one or more printing units that use the screen printing method printing units or a printing unit with one or more printing units, in particular one or more numbering units, working according to a relief printing process, in particular a letterset process.
  • the teaching in connection with a hybrid printing machine is not limited to only two printing units of different types.
  • the conditioning device 06 preferably comprises at least one drying and/or hardening device 08, e.g. B. a dryer 08, for example a radiation dryer 08 with one or more radiation sources 13, preferably based on electromagnetic radiation, for IR or preferably UV radiation, e.g. B. IR or preferably UV light sources.
  • a drying and/or hardening device 08 e.g. B. a dryer 08
  • one or more radiation sources 13 preferably based on electromagnetic radiation, for IR or preferably UV radiation, e.g. B. IR or preferably UV light sources.
  • multiple radiation sources 13; 13' two radiation sources 13; 13' of different radiation spectrums, in particular UV radiation spectrums.
  • the drying and/or curing device 08 and the cooling device 09 can be located directly in the substrate path, e.g. B. without an intermediate unit, each other follow and/or preferably in the same structural unit, for example in a type of conditioning device 06 connecting the upstream conveyor section and the input of the product receptacle 05, for example in a module 06, e.g. B. conditioning module 06, ie, for example, with its own frame and / or except for the connections to the upstream and downstream conveyors 19; 26; 39 as a whole pre-installable and/or removable structural unit, or possibly provided in the transport path as independent units arranged at a distance from one another in the substrate path.
  • a type of conditioning device 06 connecting the upstream conveyor section and the input of the product receptacle 05
  • a module 06 e.g. B. conditioning module 06, ie, for example, with its own frame and / or except for the connections to the upstream and downstream conveyors 19; 26; 39 as a whole pre-installable
  • the conditioning device 06 can be used as an independent structural unit, e.g. B. in one of the above Module 06, upstream of the product receptacle 05 or integrated into it in an input-side area of the product receptacle 05.
  • Machine 01 is preferably used to produce securities, in particular banknotes, or intermediate products of such securities, e.g. B. printed images of a plurality of securities of this type as substrate sections containing blanks, in particular substrate sheets 02.
  • the substrate 02 e.g. B. the printing material 02
  • Application device 04 Before coating in the above Application device 04 may be uncoated or already coated, it may be unprinted or already printed once or several times or may have been mechanically processed in some other way. Multiple copies, e.g. B. banknotes to be produced, arranged in a row next to each other and several such rows of blanks or their printed image one after the other in the transport direction T or to be arranged in the course of the processing of the substrate 02.
  • the machine 01 embodied as a printing press 01 can, in principle, have one or more printing units 04, of the same type or of different types Types include one or more printing units of any printing process.
  • it comprises a printing unit 04 with at least one printing unit 11 that works according to the flexographic printing method or preferably according to the screen printing method; 12, through which optically variable coating medium is or can also be applied to a first side of printing substrate 02.
  • a greater layer thickness can be applied compared to other printing methods.
  • the term "first side" of the substrate 02 or printing material 02 is chosen arbitrarily and is intended to designate that side of the printing material 02 on which the optically variable coating medium is or was or can be applied.
  • the web-shaped or preferably sheet-shaped printing material 02 is transferred - if necessary via further printing or processing units - to the e.g. B. the optically variable coating agent applying printing unit 04, z. B. flexographic or in particular screen printing unit 04, with at least one printing unit 11; 12, e.g. B. flexo or especially screen printing unit 11; 12, supplied or can be supplied.
  • two screen printing units 11; 12 are provided, which are preferably combined in the same printing unit 04 and between a respective forme cylinder 14; 16, e.g. B.
  • a screen printing cylinder 14; 16, and a common impression cylinder 17 form two printing points for the same side, here the first side, of the printing material 02 (see e.g. 2 ).
  • a drying and/or curing device 18, e.g. B. a radiation dryer 18, in particular a UV dryer 18, in particular in the form of a UV LED dryer, may be provided. It can with only one or both of the screen printing units 11; 12 optically variable coating agent can be applied or applied.
  • the printing substrate 02 is conveyed via conveying means of at least one conveying device 19; 26, e.g. B. via conveying means of a conveying device 19 directly or via the aligning device 07 and, if necessary, conveying means of a second conveying device 26, of the conditioning device 06.
  • these means can be positively driven or non-driven rollers, over which the printing material 02 can be guided or is guided.
  • sheet-type printing material 02 ie individual sheets of printing material 02 passing through machine 01, sheet-conveying means are provided as conveying means.
  • these sheet-conveying means can be formed by one or more transfer cylinders or drums, which transfer the printing material sheet 02 from the printing unit 04, e.g. B. from the impression cylinder 17, and if necessary via one or more other transfer cylinders or drums - if necessary via the alignment device 07 and/or another printing unit - on the input side to the conditioning device 06.
  • transfer cylinders or drums which transfer the printing material sheet 02 from the printing unit 04, e.g. B. from the impression cylinder 17, and if necessary via one or more other transfer cylinders or drums - if necessary via the alignment device 07 and/or another printing unit - on the input side to the conditioning device 06.
  • z. B. at least the conveyor device 19 arranged upstream of the cooling device 09; 26, but for example the first and possibly second conveyor 19; 26 as gripper circulating conveyor 19; 26 with circulating endless traction means, e.g. B.
  • a chain wheel 23 is preferably located at least in the transfer area of the printing substrate sheet 02 from the printing unit 04 and in the transfer area of the cooling unit 09 and, if provided, in the transfer area of the alignment device 07 and in its discharge area; 24; 29; 31, also chain gripper wheel 23; 24; 29; 31 called.
  • the alignment device 07 that is preferably provided (see e.g. 3 ) includes preferably a cylinder 32 which, in the area of its outer circumference, has a plurality of elements, e.g. g. permanent magnets or electromagnets, in short magnetic elements that serve to orient at least some of the magnetic or magnetizable particles of the coating medium applied to the printing substrate 02 that is passing through.
  • a plurality of elements e.g. g. permanent magnets or electromagnets
  • several rows of magnetic elements spaced apart from one another transversely to the transport direction T are provided on the circumference, which, when developed on the substrate 02, correspond to the pattern of the image elements on the substrate 02 to which magnetic fields are to be applied.
  • the cylinder 32 comprising the magnetic elements is also referred to here as the magnetic cylinder 32 .
  • the particles are aligned or oriented through the substrate 02 by means of the magnetic elements.
  • the first, e.g. B. optically variable coating agent side having at least one drying and / or curing device 33 is arranged or can be arranged. Viewed in the transport direction T, this is preferably directed towards a lateral surface segment of the magnetic cylinder 32 lying in the transport path.
  • the drying and/or curing device 33 is preferably designed as a radiation dryer 33 and works on the basis of electromagnetic radiation, e.g. B. with IR or preferably UV radiation. To this end, it has one or more radiation sources, e.g. B. IR or preferably UV light sources, especially UV LEDs. Drying and/or curing device 33 is preferably designed to act on substrate 02 in a plurality of sections spaced apart from one another transversely to transport direction T.
  • a further drying and/or hardening device 34 can be provided, which is, for example, of a different type than the drying and/or hardening device 08 located directly upstream of cooling device 09 and/or in a further development of the Conditioning device 06 - at least functionally - can also be included.
  • This further z. B. IR-based or preferably hot-air-based drying and/or curing device 34 comprises one or more dryers, e.g. B. one or more IR radiation sources or in particular one or more hot air dryers.
  • the cooling system 09 included, e.g. B. a cylinder 36 designed as a transport cylinder 36, with at least one cylinder jacket section that is to be cooled from the inside by coolant, via which the substrate 02 is transported from a point at which the substrate runs onto the transport means 36 to a point at which the substrate 02 again runs off the lateral surface of the transport means 36 (see e.g. 4 ).
  • the guide and/or transport means 36 can be a cooled guide plate, for example, which is then preferably designed with a friction-reducing surface, e.g. B. is coated with friction-reducing agents.
  • a web-shaped substrate 02 this wraps around the preferably rotating guide and/or transport means 36 over a length or in an angular segment between the point of upward movement and the point of downward movement, with the peripheral section being cooled or to be cooled for the In the case of a rotating transport means 36 then preferably extends over the full circumference.
  • the substrate 02 accumulates in the region of a Acquisition of a leading end of the substrate sheet 02 by conveying means of the upstream conveying device 19; 26 by means of holding means 38 provided on the rotating means of transport 36, e.g. g. grippers of one or more gripper strips 38, and running off in the area of a sheet discharge or transfer to conveying means of a downstream conveying device 39.
  • the rotating transport means 36 is preferably designed as a cylinder 36 to be cooled from the inside, cooling cylinder 36 for short, and preferably has a coolant supply 47 and discharge on the cylinder end.
  • This coolant supply 47 is designed, for example, as a rotary feedthrough.
  • the inflow and outflow can be coaxial with one another.
  • the cooling cylinder 36 comprises one or more holding means 38 embodied as gripper bars 38 on its periphery.
  • the cooling cylinder 36 preferably has multiple zones, in particular two zones, i. H.
  • a revolving gripper conveyor 39 with revolving endless traction means, e.g. B. as a chain gripper system 39 conveyor 39 is provided downstream of cooling cylinder 36.
  • a revolving gripper conveyor 39 with revolving endless traction means e.g. B. as a chain gripper system 39 conveyor 39 is provided downstream of cooling cylinder 36.
  • This can be attributed to product receptacle 05, for example, and conveys substrate sheets 02 via a stacking space of product receptacle 05, where it is or can be delivered to a stack to be formed there.
  • a high-voltage electrode 37 is arranged in such a way that when electrical voltage is applied, in particular operating voltage, substrate 02, in particular a substrate sheet 02, which is being guided past electrode 37, can be electrostatically charged or is being charged on the substrate path.
  • a further electrode 41 of this type e.g. B. a high-voltage electrode 41 may be provided.
  • the substrate 02 in particular the substrate sheet 02
  • the support and/or guide surface in particular the circumference of the rotating and cooled transport means 36, in particular the cooling cylinder 36, by electrostatically effective forces, which results in improved heat transfer and, if necessary, a gravitational - and/or lift-off caused by centrifugal force, e.g. B. counteracts a trailing substrate sheet section of the substrate sheet 02 held, for example, at the front end.
  • the electrode 37; 41 is arranged on the transport path at a distance from the circumference of the guide and/or transport means 36, in particular cooling cylinder 36, such that there is no physical contact between printing substrate sheets 02 transported on the transport path and the relevant electrode 37; 41 is coming.
  • a distance from the lateral surface carrying the printing material sheet 02 of z. B. at least 30 mm, advantageously at least 40 mm, in particular at least 50 mm.
  • the electrode 37; 41 is preferably arranged on the frame, which carries the guide and/or transport means 36, of the printing press 01 or of the machine section or module 06 such that the distance between the electrode 37; 41 and guiding and/or transporting means 36 can be adjusted at least in the radial direction.
  • the supporting or Lateral surface with an electrode 37; 41 interacting guide and / or transport means 36, in particular cooling cylinder 36 is at least partially electrically conductive, z. B. formed by metal segments or preferably as a continuous metal sheet over at least the length of the printing material.
  • the - e.g. B. first - considered electrode 37 in the production direction of rotation of the cooling cylinder 36 z. B. at most 60 °, in particular at most 45 °, preferably at most 30 ° behind the point of sheet pickup from the preceding conveyor 19; 26 and/or is directed in the area of a lower half of the cooling cylinder 36 onto its surface lying in the transport path.
  • the latter is particularly advantageous when the location of the sheet pickup from the upstream conveyor 19; 26 is on the cooling cylinder 36 at the lower half.
  • a second electrode 41 viewed in the production direction of rotation of the cooling cylinder 36 is approximately, i.e. +/- 15°, halfway between the Point of accumulation or takeover and point of expiry or transfer to the following conveyor 39 is located.
  • the point where the sheet is picked up or taken over on the cooling cylinder 36 is z. B. that point be designated at which the peripheral line of the cooling cylinder 36 through which the axes of rotation of the cooling cylinder 36 and of the preceding conveyor 19; 26 included rotating funding, z. B.
  • z. B considered the point at which the peripheral line of the cooling cylinder 36 through the axes of rotation of the cooling cylinder 36 and the rotating conveying means comprised by the subsequent conveying device 39, e.g. B. a sprocket 51, z. B. chain gripper wheel 51 or in another embodiment of a transport cylinder, connecting plane is cut.
  • a linear peak count density of 80 to 120 peaks per meter is envisaged.
  • a voltage present during operation or to be provided for operation is e.g. B. at least 20 kV, preferably even more than 25 kV.
  • the electrode 37; 41 viewed in the circumferential direction of the cooling cylinder 36, a device 43 supporting the application of the substrate 02 to the lateral surface; 44; 46 provided.
  • This is - viewed in the circumferential direction of the cooling cylinder 36 - preferably at most 25 °, in particular at most 15 ° in front of the relevant electrode 37; 41 and thus supports the application of the printing material sheet 02 to the cooling cylinder 36 and/or counteracts unintentional physical contact between the printing material sheet 02 and the electrode 37; 41 against
  • This facility 43; 44; 46 can e.g. Am figure 5
  • a roller 43 that can be placed against the outer surface can be seen, which is connected to the electrode 37; 41 arranged upstream in the substrate path and/or can be mounted and removed on the frame or the electrode 37; 41 is stored.
  • a brush 44 that is or can be placed on the lateral surface can be provided as the device 44 that supports the application of the substrate 02, which brush 44 is attached to the electrode 37; 41 upstream in the substrate path and/or can be attached and removed from the frame is stored (see e.g. 6 ).
  • a blowing device 46 can be provided as the device 46 that supports the positioning of the substrate 02.
  • This is the electrode 37; 41 upstream in the substrate path and/or can be installed separately in the frame or, as shown here, on the electrode 37; 41 be arranged.
  • the blow device 46 in the housing of the electrode 37; 41 can be integrated in that, for example, the side facing the cooling cylinder 36 includes both the electrode tips 42 and blast air openings 49 . The latter can, for example, surround the electrode tips 42 in the manner of a ring.
  • a discharge electrode 52 and / or reversed polarity or grounded electrode 52 z. B.
  • high-voltage electrode 52 is provided. This has, for example, to the preceding electrode 37; 41 has reversed polarity, so that charge carriers carried on the substrate 02 are at least partially dissipated again and the electrostatic charge is thus reduced, ideally even eliminated.
  • the discharge electrode 52 is - in particular under the condition that it downstream of the first and possibly second electrode 37; 41 is provided on the periphery of the cooling cylinder 36 -. B. at a distance of at most 60 °, in particular at most 45 °, preferably even at most 30 ° to the point of transfer to a cooling cylinder 36 subsequent conveyor 39 is provided.
  • a distance from the lateral surface can advantageously be smaller than in the aforementioned electrode 37; 41, e.g. B. a distance of at least 10 mm, in particular at least 15 mm, and / or at most 40 mm, in particular at most 30 mm, preferably 20 ⁇ 3 mm.
  • a contact with an electrically conductive and grounded stripping device can also be provided, by means of which the charge carriers carried along on the substrate 02 can be stripped off.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
EP20712880.2A 2019-04-03 2020-03-13 Druckmaschine und verfahren zur herstellung von druckprodukten Active EP3946949B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019108765.1A DE102019108765A1 (de) 2019-04-03 2019-04-03 Druckmaschine und Verfahren zur Herstellung von Druckprodukten
PCT/EP2020/056903 WO2020200703A1 (de) 2019-04-03 2020-03-13 Druckmaschine und verfahren zur herstellung von druckprodukten

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EP3946949A1 EP3946949A1 (de) 2022-02-09
EP3946949B1 true EP3946949B1 (de) 2023-01-11

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US (1) US11214053B2 (ja)
EP (1) EP3946949B1 (ja)
JP (1) JP7031066B2 (ja)
CN (1) CN113508037B (ja)
DE (1) DE102019108765A1 (ja)
WO (1) WO2020200703A1 (ja)

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DE102021105926A1 (de) * 2021-03-11 2022-09-15 Koenig & Bauer Ag Transportzylinder, Trocknungseinheit mit diesem Transportzylinder und Bogendruckmaschine mit dieser Trocknungseinheit

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JP6953826B2 (ja) * 2017-06-22 2021-10-27 コニカミノルタ株式会社 画像形成装置
CN207669976U (zh) * 2017-11-26 2018-07-31 长葛市大阳纸业有限公司 除静电的纸张印刷机
CN109397867A (zh) * 2018-09-30 2019-03-01 吴明美 一种用于作业本印刷过程中的加湿除静电装置

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CN113508037A (zh) 2021-10-15
DE102019108765A1 (de) 2020-10-08
CN113508037B (zh) 2022-07-01
EP3946949A1 (de) 2022-02-09
US11214053B2 (en) 2022-01-04
WO2020200703A1 (de) 2020-10-08
US20210309005A1 (en) 2021-10-07
JP7031066B2 (ja) 2022-03-07

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