EP1401660B1 - Procede et dispositif permettant de produire differentes images imprimees a partir du meme support d'impression - Google Patents

Procede et dispositif permettant de produire differentes images imprimees a partir du meme support d'impression Download PDF

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Publication number
EP1401660B1
EP1401660B1 EP02754824A EP02754824A EP1401660B1 EP 1401660 B1 EP1401660 B1 EP 1401660B1 EP 02754824 A EP02754824 A EP 02754824A EP 02754824 A EP02754824 A EP 02754824A EP 1401660 B1 EP1401660 B1 EP 1401660B1
Authority
EP
European Patent Office
Prior art keywords
ink
print
attracting
regions
carrier
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.)
Expired - Lifetime
Application number
EP02754824A
Other languages
German (de)
English (en)
Other versions
EP1401660A1 (fr
Inventor
Manfred Wiedemer
Robert Link
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.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Oce Printing Systems GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE10132204A external-priority patent/DE10132204A1/de
Priority claimed from DE2002106943 external-priority patent/DE10206943A1/de
Application filed by Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Publication of EP1401660A1 publication Critical patent/EP1401660A1/fr
Application granted granted Critical
Publication of EP1401660B1 publication Critical patent/EP1401660B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1075—Mechanical aspects of on-press plate preparation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/06—Lithographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/70—Forming the printing surface directly on the form cylinder

Definitions

  • the invention relates to a method and apparatus for producing a printed image on a substrate, wherein on the surface of the print carrier ink-attracting and ink-repellent areas are generated according to the structure of the printed image to be printed on the surface of the print carrier is applied to the color adhering to ink-attracting areas and which is not accepted by the ink-repellent areas, and in which the surface-distributed ink is printed on the substrate.
  • ink-attracting and ink-repellent areas are distributed on the printing plate.
  • the printing plate can be used for a variety of transfer printing operations. For each print image, a new plate must be created with ink-attracting and ink-repellent areas.
  • a method which is called a direct imaging method in which a printing original is created in the printing device on a multilayer, silicone-coated film by selective burning away of the silicone top layer.
  • the silicone-free areas are the ink-attracting areas that accept printing ink during the printing process. Every new print requires a new foil.
  • hydrophobic and hydrophilic areas are formed on the surface of the print substrate in accordance with the structure of the printable Print image generated.
  • a thin film of moisture is first applied to the print substrate using applicator rollers or sprayers, which wets the hydrophilic area of the print substrate.
  • the inking roller transfers ink to the surface of the print substrate, which wets only those areas not covered by the moisture film. After dyeing, the color is finally transferred to the carrier material.
  • a hydrophobic layer is removed by partial burning away and exposing a hydrophilic layer.
  • the hydrophilic layer can be wetted with an ink-repellent fountain solution.
  • the hydrophobic areas are ink accepting and can absorb ink during the printing process.
  • a new printing plate must be used.
  • the aforementioned methods have the problem that the print carrier must be renewed before creating a new print image or the surface of the print carrier can only be cleaned outside the printing device or additional ink-absorbing substances are consumed.
  • An apparatus and method for imaging a printing form for wet offset printing is known.
  • the surface of the print carrier is completely wetted with a ink-repellent dampening solution. With the help of radiation, image areas are dried, which are then color-accepting.
  • the surface of the print carrier is completely covered with paint. With the help of radiation, this color is dried at image points. At non-image areas, the color is removed by a color-repellent dampening solution.
  • a method for producing a printed image in which a solvent layer is sprayed onto a lithographic printing substrate.
  • the solution is applied to the bare print carrier and / or removed therefrom.
  • Ink is applied to the ink-attracting solvent and then transferred to the recording medium. After each transfer operation, the print carrier is cleaned and can be re-provided with the same or a different solvent image.
  • a photosensitive substance is applied to a hydrophilic metal surface of a print substrate. By exposure, the substance is removed according to a printed image. Subsequently, ink is applied to the ink-attracting areas and the printed image is reprinted. After each transfer, the surface is cleaned again.
  • This device corresponds in principle to an electrophotographic printer.
  • a method of printing a substrate using a structured layer of ice on a print substrate is known.
  • ink-attracting and ink-repelling areas corresponding to the structure of the print image to be printed is generated on the surface of the print carrier.
  • the ink-repellent areas are produced by means of an ice layer as a result of condensation.
  • the surface of the print substrate is cleaned before a new patterning process and coated again with an ink-absorbing dampening layer.
  • the fountain solution layer is then structured in a patterning process according to the print image to be printed.
  • a carrier substance is applied, which adheres to ink-attracting areas.
  • the structured surface of the carrier is fixed.
  • On the ink-attracting areas can then be applied color, which will be reprinted in the next step.
  • the print carrier can therefore be used for a variety of structuring processes. With the same print carrier so different print content can be printed without the print carrier must be replaced.
  • the structure can be used for a variety of transfer operations where the applied ink is transferred to substrate. In the method according to the invention, the consumption of printing substrate is minimized. In addition, the handling simplified, since in contrast to conventional methods, an exchange of the carrier with the image structure does not have to be done.
  • the fountain solution layer is adapted to the applied color. If the paint contains water, this fountain solution layer is color-attracting.
  • the pressure-active surface of the print carrier is first completely provided with the fountain solution layer. In a subsequent structuring process, regions are generated which are free of said dampening solution layer. In this way, ink-attracting and ink-repellent areas can be generated according to the structure of the print image to be printed.
  • the surface of the print carrier does not have to be pretreated according to the structure of the print image to be printed, for example by etching. Rather, the pressure-active surface in the initial state is uniform and smooth.
  • the patterning process merely involves the generation of moisture-free areas corresponding to the structure of the print image to be printed. Accordingly, different printed images can be produced on the same surface of the print carrier, wherein for each print image the initial state of the surface of the print carrier is to be produced. If a new print image is to be applied to the print substrate, the print substrate must be cleaned of the areas provided with the fountain solution layer and any ink residues. So it is not consumed the print carrier. There are also no additional consumables, such as multi-layered Films with ink-repellent layer, necessary for the production of ink-repellent areas on the surface of the print carrier.
  • Radiation energy is used to selectively produce dampener-free areas on the surface of the print carrier.
  • the production of a structured fountain solution layer on the surface of the print carrier requires a comparatively low radiation energy. This automatically leads to a significant reduction of the writing time: it is at a range of 450 x 330 mm 2 (resolution 2540 dpi) with 16 laser diodes à 0.7 W only about 30 s; In comparison, for example, requires the direct imaging method of a known printing machine 10 min.
  • the moistening agent layer residues, the carrier substance residues and paint residues from the surface of the print carrier are eliminated by a cleaning station.
  • the surface of the print carrier is regenerated.
  • the surface of the print carrier can be brought back into a hydrophilic state again.
  • the surface of the print carrier can be coated again with a fountain solution layer.
  • the print carrier remains in this cleaning process and re-structuring in the printing device, resulting in a faster printing form production. In this way, different printed images can be produced on the same print carrier and colored once or several times and re-printed without the print carrier for the cleaning process or before the re-structuring of the printing device must be removed.
  • a device for printing is specified.
  • the device has a dampening unit, which is the surface of a print carrier with a fountain solution coating. Blasting agents structure the dampening solution layer on the print carrier in accordance with the structure of the print image to be printed.
  • An applicator applies a carrier to the surface.
  • a fixing unit fixes the carrier substance as a result of a fixing process.
  • a cleaning station cleans the surface of the print carrier before a new structuring process.
  • FIG. 1 schematically shows the structure of a device for printing, in which 20 different printed images can be generated on the same surface of a print carrier.
  • This device comprises an inking unit 10 with four rollers 12, 14, 16, 17, is transferred by the color from a paint reservoir 18 to the surface of the print carrier 19.
  • the inked surface of the plate cylinder 20 transfers the ink to a blanket cylinder 22. From there, the ink passes onto a paper web 24, which is pressed by a counter-pressure cylinder 26 against the blanket cylinder 22.
  • the in FIG. 1 at the plate cylinder 20 drawn arrow P 1 indicates the direction of transport.
  • a dampening unit 30 with its three rollers 32, 34, 36 transfers dampening solution, for example water, from a dampening solution reservoir 38 onto the surface of the plate cylinder 20.
  • dampening solution for example water
  • the surface of the print substrate 19 can be brought into a more hydrophilic state using wetting agents and / or surfactants or by corona and / or plasma treatment.
  • the application of dampening solution layer can be done by means of rollers, as in the present case, or it can be used a steam or spray process.
  • the pressure-active surface of the plate cylinder 20 is completely provided with a fountain solution layer.
  • the fountain solution layer is selectively removed by energy supply by means of a laser system 40 and there is the desired image patterning.
  • the exposure is carried out with a laser beam 42, as in FIG. 1 is indicated.
  • an ice layer can also be used.
  • the print carrier contains a cooling system (not shown).
  • the surface of the print carrier is cooled by the cooling system to a temperature below the solidification point of water.
  • the temperature of the surface of the print carrier is below 0 ° C.
  • the water vapor contained in the ambient air is deposited as an ice layer due to condensation on the surface of the print carrier.
  • an electrothermal cooling principle is used, for example by the use of Peltier elements. Another possibility is to apply a thin film of water with a thickness in the micron range. Cooling then creates a layer of ice.
  • a spraying process can be used, or the application can be made using rollers.
  • the pressure-active surface of the print carrier is completely covered with a layer of ice.
  • the ice layer is then selectively removed by energy supply by means of the laser system.
  • the exposure is made by the laser beam.
  • the water of the ice layer is converted into the vapor state by exposure to the laser beam.
  • the coloring of the surface of the plate cylinder 20 according to FIG. 1 takes place by means of the rollers 12, 14, 16, 17 of the inking unit, which transfer color from the ink reservoir 18.
  • the order of the paint is done here by a roller system.
  • the paint can also be applied to the surface of the print carrier by spraying, knife coating or condensing.
  • the above-mentioned carrier substance is therefore identical to the color in this example.
  • the applied after structuring paint is solidified by means of a fixing device 50. This is done by IR radiation, hot air, UV light or heat radiation.
  • the fixed color is then dyed once or more times with ink from the inking unit 10.
  • By curing the applied color a printing form is created as it were, which allows a multiple recording of color and a repeated transfer of color.
  • the applied to the plate cylinder ink is transferred to the blanket cylinder 22 and from there onto the substrate 24.
  • the on the plate cylinder 20 distributed color can alternatively be transferred directly to the substrate 24, in which case can be dispensed with the blanket cylinder 22.
  • a large number of printing processes takes place before the surface is restructured.
  • the print image on the print substrate is dyed and reprinted once per transfer print, i. There is a multiple coloring of the printed image.
  • the temperature of this surface is kept below the freezing point by means of the cooling system.
  • a cleaning station 60 is activated. It contains a brush 62 and a wiper lip 64, which are brought into contact with the surface of the print carrier and eliminate the structured layer and the color residues.
  • the removal of the patterned layer is performed using ultrasound, high pressure liquid and / or steam.
  • the surface of the print carrier is thereby cleaned by means of brushes, cloths, rollers and / or doctor blades. The cleaning may be done in one or more cycles using tools such as cleaning fluids and / or solvents.
  • For activating and deactivating the cleaning station is pivoted in the direction of the arrow P2 to the plate cylinder 20. Any existing cooling system may be inactive during cleaning.
  • a regeneration of the surface of the print substrate preferably using wetting agents and / or surfactants.
  • a corona or plasma treatment of the surface of the print substrate so that it is brought into a hydrophilic state.
  • the surface of the print carrier contains coatings which have a low optical penetration depth, low reflection values and poor heat conduction.
  • FIG. 2 shows the structure of a printing device, in the deviating from the example according to FIG. 1 after structuring the surface of the print carrier, a carrier 74 different from the color is applied by a separate applicator 70 by means of a roller 72.
  • the optimized for this process carrier 74 adheres to the ink-attracting areas and is not accepted by the ink-repellent areas.
  • the carrier substance is fixed by means of the fixing device 50. This is done by IR radiation, hot air, UV light and / or thermal radiation.
  • the fixed carrier substance 74 is colored once or several times by means of the inking unit 10 in the further printing process.
  • FIG. 3 shows the structure of a printing device according to another embodiment, wherein like elements are still designated the same.
  • an intermediate cylinder 76 is arranged, which causes an additional color splitting.
  • a higher amount of ink can be applied to the print substrate 20, whereby the printing plate has improved stability and wear is reduced in a large number of printing operations.
  • a suitable surface of the intermediate cylinder 76 a further load reduction of the printing plate can be achieved.
  • soft and flexible surfaces are used for the intermediate cylinder 76, which ensure a uniform color splitting.
  • a cleaning station 60 ' is arranged, which has the same structure as the cleaning station 60.
  • the brush 62 and the wiper lip 64 which are brought into contact with the surface of the intermediate cylinder 76 by a pivoting movement in the direction of the arrow P2, ink residues are removed.
  • the intermediate cylinder 76 is prepared for the color transfer with a new image structure.
  • the fixing unit 50 is effective for fixing the ink.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Methods (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (6)

  1. Procédé de réalisation d'une image imprimée sur un matériau support (24), dans lequel
    - la surface d'un support d'impression (20) est revêtue d'une couche d'agent humide chromophile,
    - dans un processus de structuration par des moyens de rayonnement, des zones de la couche d'agent humide sont éliminées conformément à la structure de l'image à imprimer, moyennant quoi il se forme des zones chromophiles et des zones chromophobes en correspondance avec l'image à imprimer,
    - un agent porteur est déposé sur la surface, lequel agent adhère aux zones chromophiles et n'est pas accepté par les zones chromophobes,
    - l'agent porteur est soumis à un processus de fixage,
    - le colorant est déposé sur la surface, moyennant quoi les zones chromophiles sont teintées une ou plusieurs fois avec le colorant,
    - le colorant et donc l'image imprimée sont transférés sur le matériau support (24), et
    - dans lequel, avant un nouveau processus de structuration, la surface du support d'impression (20) est nettoyée, et est à nouveau revêtue d'une couche d'agent humide chromophile.
  2. Procédé selon la revendication 1, caractérisé en ce que la surface du support d'impression (20) est amenée à un état hydrophile avant l'application de la couche d'agent humide.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un colorant est utilisé pour former l'agent porteur, et ledit colorant est soumis au processus de fixage, le colorant fixé étant teinté ensuite une ou plusieurs fois avec un colorant.
  4. Procédé selon la revendication 1, caractérisé en ce que, pendant le processus de fixage, on applique un rayonnement infrarouge, de l'air chaud, une lumière ultraviolette et/ou un rayonnement thermique.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une pluralité de processus d'impression sont mis en oeuvre avant un nouveau processus de structuration de la surface, de sorte que le support d'impression (20) est ainsi teinté à plusieurs reprises.
  6. Dispositif pour la réalisation d'une image imprimée sur un matériau support (24),
    - qui comporte un dispositif de mouillage (30), qui dépose une couche d'agent humide chromophile sur la surface d'un support d'impression (20),
    - qui comporte des moyens de rayonnement (40), par le rayonnement desquels des zones de la couche d'agent humide sont éliminées sur le support d'impression (20) conformément à la structure de l'image à imprimer,
    - qui comporte un dispositif de dépôt (10 ; 70), qui dépose sur la surface un agent porteur, qui adhère aux zones chromophiles et n'est pas accepté par les zones chromophobes,
    - qui comporte une unité de fixage (50), qui fixe l'agent porteur sous l'effet d'un processus de fixage,
    - qui comporte un dispositif de coloration (10), par lequel un colorant est déposé sur la surface, moyennant quoi les zones chromophiles sont teintées une ou plusieurs fois, et
    - qui comporte un poste de nettoyage (60), qui nettoie la surface du support d'impression (20) avant un nouveau processus de structuration.
EP02754824A 2001-07-03 2002-07-03 Procede et dispositif permettant de produire differentes images imprimees a partir du meme support d'impression Expired - Lifetime EP1401660B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10132204 2001-07-03
DE10132204A DE10132204A1 (de) 2001-07-03 2001-07-03 Verfahren und Vorrichtung zum Erzeugen unterschiedlicher Druckbilder auf demselben Druckträger
DE2002106943 DE10206943A1 (de) 2002-02-19 2002-02-19 Verfahren und Einrichtung zum Erzeugen unterschiedlicher Druckbilder auf demselben Druckträger
DE10206943 2002-02-19
PCT/EP2002/007393 WO2003004271A1 (fr) 2001-07-03 2002-07-03 Procede et dispositif permettant de produire differentes images imprimees a partir du meme support d'impression

Publications (2)

Publication Number Publication Date
EP1401660A1 EP1401660A1 (fr) 2004-03-31
EP1401660B1 true EP1401660B1 (fr) 2010-11-03

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Application Number Title Priority Date Filing Date
EP02754824A Expired - Lifetime EP1401660B1 (fr) 2001-07-03 2002-07-03 Procede et dispositif permettant de produire differentes images imprimees a partir du meme support d'impression

Country Status (4)

Country Link
EP (1) EP1401660B1 (fr)
AT (1) ATE486717T1 (fr)
DE (1) DE50214749D1 (fr)
WO (1) WO2003004271A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10206946A1 (de) * 2002-02-19 2003-09-04 Oce Printing Systems Gmbh Verfahren und Einrichtung zum Drucken, wobei eine Hydrophilisierung des Druckträgers durch freie Ionen erfolgt
JP6091106B2 (ja) * 2011-08-05 2017-03-08 パロ・アルト・リサーチ・センター・インコーポレーテッドＰａｌｏ Ａｌｔｏ Ｒｅｓｅａｒｃｈ Ｃｅｎｔｅｒ Ｉｎｃｏｒｐｏｒａｔｅｄ マーキング材料サブシステム

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3741118A (en) * 1970-06-17 1973-06-26 A Carley Method for electronic lithography
JPS5944225B2 (ja) * 1976-04-27 1984-10-27 株式会社東京機械製作所 製版装置を付設した印刷装置
US5379698A (en) 1992-07-20 1995-01-10 Presstek, Inc. Lithographic printing members for use with laser-discharge imaging
US5816161A (en) 1994-07-22 1998-10-06 Man Roland Druckmaschinen Ag Erasable printing plate having a smooth pore free metallic surface
WO1998032608A1 (fr) 1997-01-27 1998-07-30 Oce Printing Systems Gmbh Dispositif et procede d'impression sur un materiau de support a l'aide d'une couche de glace structuree
CA2302249C (fr) 1998-09-21 2003-03-18 Presstek, Inc. Plaques d'impression lithographique destinees a un appareil d'imagerie laser
DE19911906A1 (de) 1999-03-17 2000-09-28 Wifag Maschf Bebilderung einer Druckform für einen Nassoffsetdruck

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Publication number Publication date
WO2003004271A1 (fr) 2003-01-16
DE50214749D1 (de) 2010-12-16
ATE486717T1 (de) 2010-11-15
EP1401660A1 (fr) 2004-03-31

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