EP0339409B1 - Process and apparatus for flexographic printing - Google Patents

Process and apparatus for flexographic printing Download PDF

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Publication number
EP0339409B1
EP0339409B1 EP89106782A EP89106782A EP0339409B1 EP 0339409 B1 EP0339409 B1 EP 0339409B1 EP 89106782 A EP89106782 A EP 89106782A EP 89106782 A EP89106782 A EP 89106782A EP 0339409 B1 EP0339409 B1 EP 0339409B1
Authority
EP
European Patent Office
Prior art keywords
water
printing
temperature
degrees celsius
inking unit
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
EP89106782A
Other languages
German (de)
French (fr)
Other versions
EP0339409A2 (en
EP0339409A3 (en
Inventor
Heinrich Konrad Grosshauser
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
Original Assignee
Koenig and Bauer AG
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
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP0339409A2 publication Critical patent/EP0339409A2/en
Publication of EP0339409A3 publication Critical patent/EP0339409A3/en
Application granted granted Critical
Publication of EP0339409B1 publication Critical patent/EP0339409B1/en
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
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/02—Letterpress printing, e.g. book printing
    • B41M1/04—Flexographic printing
    • 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

Description

Die Erfindung betrifft ein Verfahren zum weitgehenden Verhindern des Zusetzens von gerasterten Druckplatten und eine Einrichtung zur Durchführung des Verfahrens nach dem Oberbegriff des Patentanspruches 1.The invention relates to a method for largely preventing the clogging of screened printing plates and a device for carrying out the method according to the preamble of claim 1.

Es ist bekannt unter Anwendung des Flexo-Druckverfahrens zum Druck von Periodicas, z. B. Zeitungen, mit dem Druckträger Papier sogenannte Flexo-Wasserfarben zu verwenden. Das Flexo-Druckverfahren ist charakterisiert durch die Anwendung von gerasterten Walzen, die von einem Kammerrakel ihren Farbauftrag erhalten und eine Kunststoff-Druckplatte, z. B. Photopolymere-Druckplatte, einfärben (siehe auch DE-OS 33 20 638; DE-OS 31 35 711). Die druckende Oberfläche der Druckplatte ist gerastert.It is known using the flexographic printing process to print periodicas, e.g. B. newspapers to use so-called flexographic watercolors with the printing medium paper. The flexographic printing process is characterized by the use of screened rollers, which receive their ink application from a chamber doctor blade, and a plastic printing plate, e.g. B. photopolymer printing plate, colorize (see also DE-OS 33 20 638; DE-OS 31 35 711). The printing surface of the printing plate is rasterized.

Es hat sich herausgestellt, daß neben allen Vorzügen, die "Wasserfarben", die im wesentlichen aus Farbpigmenten, einem Zusatz und Wasser bestehen, aufweisen, ein sogenanntes "plugging", das ist ein partielles "Zusetzen" des Rasters auf der Druckplatte, vorkommen kann. Diese Störung kann sich dann natürlich auch im gedruckten Bild zeigen. Die Gefahr des Zusetzens von Teilen der Druckplatte ist umso größer, je feiner das Raster und je größer der Flächenanteil der Rasterpunkte pro Flächeneinheit ist.It has been found that, in addition to all the advantages which "water colors" have, which consist essentially of color pigments, an additive and water, so-called "plugging", which is a partial "clogging" of the grid on the printing plate, can occur . This disturbance can of course also be shown in the printed image. The risk of clogging parts of the printing plate is greater, the finer the grid and the larger the proportion of the grid points per unit area.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Einrichtung zur Durchführung des Verfahrens zu schaffen, mit denen es möglich ist, das Zusetzen von gerasterten Flächen von Druckplatten auf Kunststoffbasis, die mittels Wasserfarben eingefärbt werden, weitgehendst zu vermeiden.The invention has for its object to provide a method and a device for performing the method with which it is possible to clog avoid as much as possible screened surfaces of plastic-based printing plates that are colored using water colors.

Diese Aufgabe wird durch die kennzeichnenden Teile der Ansprüche 1 oder 2 gelöst.This object is solved by the characterizing parts of claims 1 or 2.

Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß die Rollenrotationsdruckmaschine, in der wasserverdünnbaren Flexo-Druckfarbe (Wasserfarbe) verwendet wird, nicht angehalten werden muß, um die Oberfläche d. h. die Näpfchen der gerasterten Fläche der Druckplatte zu reinigen.The advantages that can be achieved with the invention are, in particular, that the web-fed rotary printing press, in which water-dilutable flexographic printing ink (water-based ink) is used, does not have to be stopped in order to remove the surface d. H. to clean the cells of the screened surface of the pressure plate.

Das Verfahren und ein Ausführungsbeispiel der Erfindung werden im folgenden näher beschrieben.The method and an embodiment of the invention are described in more detail below.

In einer das Flexo-Druckverfahren anwendenden Rollenrotationsdruckmaschine zum Drucken von z. B. Zeitungen besteht das Farbwerk z. B. aus einem sogenannten Spülfarbwerk, wie es in der DE-OS 31 35 711 bzw. DE-OS 33 20 638 beschrieben worden ist. In bekannter Weise ist in Seitengestellen eine angetriebene Rasterwalze gelagert. An die Rasterwalze an- und abstellbar sind eine oder mehrere Farbauftragsleisten angeordnet. An den Farbauftragsleisten sind ein oberes Rakelmesser und ein unteres Abstreifmesser befestigt. In angestellem Zustand liegen das Rakelmesser und das Abstreifmesser an einer Mantelfläche der Rasterwalze an. Die Farbauftragsleiste ist mit einer der Mantelfläche gegenüberliegenden, sich über die gesamte Länge der Farbauftragsleiste erstreckenden Ausnehmung versehen. Diese Ausnehmung steht über eine Durchgangsbohrung mit einer Farbzuführeinrichtung in Verbindung. Die Rasterwalze färbt die Druckplatten auf Kunststoffbasis, z. B. Photopolymere, ein.In a rotary printing press using the flexographic printing process for printing e.g. B. Newspapers there is the inking z. B. from a so-called flushing inking unit, as has been described in DE-OS 31 35 711 and DE-OS 33 20 638. In a known manner, a driven anilox roller is mounted in side frames. One or more ink application bars are arranged on and off the anilox roller. An upper doctor blade and a lower doctor blade are attached to the ink application bars. In the engaged state, the doctor blade and the doctor blade lie against a lateral surface of the anilox roller. The paint application bar is with one opposite the outer surface, over the entire length of the paint application bar extending recess provided. This recess is connected to a paint feed device via a through hole. The anilox roller colors the printing plates on a plastic basis, e.g. B. photopolymers.

Aus einer an sich bekannten Farbzuführ- und temperiereinrichtung wird der Kammer des Spülfarbwerkes über die Durchgangsbohrung fortwährend Wasserfarbe zugeführt, die auf einer Temperatur wahlweise zwischen 9 und 14 Grad Celsius gehalten wird. Diese Wasserfarbe wird fortwährend dem Spülfarbwerk zugeführt und die überschüssige Wasserfarbe fortwährend aus dem Farbwerk abgeführt und der Farbzuführ- und temperiereinrichtung zurückgeführt. Die Farbzuführ- und temperiereinrichtung hält die Temperatur der Wasserfarbe auf eine wahlweise eingestellte Temperatur zwischen 9 und 14 Grad Celsius konstant.From a paint supply and temperature control device known per se, water is continuously supplied to the chamber of the flushing inking unit via the through-hole, which is optionally kept at a temperature between 9 and 14 degrees Celsius. This water color is continuously fed to the flushing inking unit and the excess water color is continuously removed from the inking unit and returned to the ink supply and temperature control device. The ink supply and tempering device keeps the temperature of the water color constant at an optionally set temperature between 9 and 14 degrees Celsius.

Die Rasterwalze ist hohl und über bekannte Rotoranschlüsse über Vor- und Rücklaufleitungen mit einer Einrichtung zum Zuführen und Temperieren von Wasserfarbe einer vorwählbaren Temperatur verbunden. Die Wasserzirkulation wird dabei so eingestellt, daß die Oberflächentemperatur der Rasterwalze auf einer zwischen 18 und 22 Grad Celsius vorwählbaren Temperatur konstant gehalten wird.The anilox roller is hollow and is connected via known rotor connections via feed and return lines to a device for supplying and tempering water color of a preselectable temperature. The water circulation is adjusted so that the surface temperature of the anilox roller is kept constant at a temperature that can be preselected between 18 and 22 degrees Celsius.

Claims (2)

  1. Method of substantially preventing the clogging of screen surfaces of a printing plate, inked with water-based inks, of a web-fed rotary printing machine for printing a print carrier, preferably of paper, characterized in that water-based ink is continuously supplied to an inking unit at a preselectable temperature between 9 and 14 degrees Celsius, in that the unconsumed water-based ink is continuously conveyed away from the inking unit, and in that the surface temperature of the screen roller of the inking unit is kept constant at a temperature which is preselectable between 18 and 22 degrees Celsius.
  2. Device for implementing the method according to Claim 1, characterized in that the inking unit processing the water-based ink of a web-fed rotary printing machine, which operates according to the flexo printing process, for printing a print carrier, preferably of paper, is connected to a device which keeps the water-based ink at a temperature which is preselectable between 9 and 14 degrees Celsius, and in that the screen roller is connected to a device for keeping constant its surface temperature, which is selectable between 18 and 22 degrees Celsius.
EP89106782A 1988-04-26 1989-04-15 Process and apparatus for flexographic printing Expired - Lifetime EP0339409B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3814049 1988-04-26
DE3814049A DE3814049A1 (en) 1988-04-26 1988-04-26 METHOD AND DEVICE FOR FLEXO PRINTING

Publications (3)

Publication Number Publication Date
EP0339409A2 EP0339409A2 (en) 1989-11-02
EP0339409A3 EP0339409A3 (en) 1991-08-07
EP0339409B1 true EP0339409B1 (en) 1994-08-10

Family

ID=6352902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106782A Expired - Lifetime EP0339409B1 (en) 1988-04-26 1989-04-15 Process and apparatus for flexographic printing

Country Status (4)

Country Link
US (1) US5010817A (en)
EP (1) EP0339409B1 (en)
JP (1) JP2806968B2 (en)
DE (2) DE3814049A1 (en)

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US5226363A (en) * 1990-09-11 1993-07-13 The Langston Corporation Dual pressure preload system for maintaining a member
US5367982A (en) * 1993-02-25 1994-11-29 Howard W. DeMoore Automatic coating circulation and wash-up system for printing presses
DE9305552U1 (en) * 1993-04-16 1993-06-03 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE4413731C2 (en) * 1994-04-20 1998-07-02 Heidelberger Druckmasch Ag Process for controlling the temperature of the printing ink in a printing press
US5683508A (en) * 1995-08-25 1997-11-04 Fit Group, Inc. Coating apparatus and method for dispensing a liquid, and draining and cleaning a coating apparatus
US5826509A (en) * 1995-10-18 1998-10-27 Deneka; P. Kenneth Printing coating head device
US5694848A (en) * 1996-03-13 1997-12-09 Heidelberger Druckmaschinen Ag Printing unit for water based inks
US5768993A (en) * 1997-05-09 1998-06-23 Bryce International, L.L.C. Inking system for offset printers
US5927189A (en) * 1997-12-30 1999-07-27 Kimberly-Clark Worldwide, Inc. Method and apparatus for thermal fusing with two textured endless belts
AU2003248309B2 (en) * 1998-12-16 2004-09-02 Memjet Technology Limited A printer for incorporation into consumer electronic (CE) systems with limited access
SG116488A1 (en) * 1998-12-16 2005-11-28 Silverbrook Res Pty Ltd Printer transfer roller with internal drive motor.
US6631986B2 (en) * 1998-12-16 2003-10-14 Silverbrook Research Pty Ltd Printer transport roller with internal drive motor
AUPP773798A0 (en) * 1998-12-16 1999-01-21 Silverbrook Research Pty Ltd An image creation method and apparatus(CEP02)
US6383296B1 (en) 1999-11-22 2002-05-07 Harris & Bruno Machine Co. Chambered doctor blade with automatic cleanup and ink replacement
US6576059B2 (en) * 1999-11-22 2003-06-10 Harris & Bruno Company, Inc. Chambered doctor blade system for water-based and UV-based coatings
JP2002086886A (en) * 2000-09-08 2002-03-26 Nihon Tokkyo Kanri Co Ltd Gravure printing method for printing with water-based ink and gravure printing machine using water-based ink
DE102004042266A1 (en) * 2004-09-01 2006-03-02 Koenig & Bauer Ag Short inking system tempering method for printing machine, involves setting scanning roller to optimal and job specific temperature and setting ink to temperature of scanning roller, when ink is supplied to squeegee
US8960086B2 (en) 2009-06-26 2015-02-24 The Procter & Gamble Company Systems and methods for varying the repeat pitch distance of a substrate for use with absorbent articles

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DE442922C (en) * 1925-08-10 1927-04-12 Maschf Augsburg Nuernberg Ag Process for treating the color before printing in gravure printing machines
US2396946A (en) * 1939-08-18 1946-03-19 Interchem Corp Method and apparatus for applying thermoplastic material to sheets or webs
US2260364A (en) * 1940-05-18 1941-10-28 John Waldron Corp Ink distribution system
GB566461A (en) * 1942-08-19 1945-01-01 Goss Printing Press Co Ltd Method of printing with water base and like inks
DE1786295B2 (en) * 1968-09-13 1972-08-31 Keller, Leo P.H., Dipl.Rer.Pol., 7000 Stuttgart PROCESS FOR CONTROLLING THE MUTUAL BEHAVIOR OF SUBSTANCE TO BE PRINTED AND INK
DE1801622B2 (en) * 1968-10-07 1973-02-01 Keller, Leo P H , Dipl rer pol, 7000 Stuttgart Regulation in intaglio printing - of mutual ink/printing base retention by temperature differences during printing
DE1908043A1 (en) * 1969-02-18 1970-09-03 Leo Keller Ink transfer for surface or relief - printing
US4152986A (en) * 1976-12-03 1979-05-08 Dadowski Gilbert F Method and apparatus for printing raised ink images
US4362179A (en) * 1980-09-26 1982-12-07 Baldwin-Gegenheimer Corporation Method and apparatus for controlling ink viscosity
US4497250A (en) * 1983-02-08 1985-02-05 Motter Printing Press Co. Ink Fountain
DE3320638C2 (en) * 1983-06-08 1986-10-16 Koenig & Bauer AG, 8700 Würzburg Ink dividing device on ink fountain rollers of printing machines
DE3541458A1 (en) * 1985-11-23 1987-05-27 Koenig & Bauer Ag SHORT INKS FOR OFFSETROTATION PRINTING MACHINES
JPH01114442A (en) * 1987-10-28 1989-05-08 Tokyo Kikai Seisakusho Ltd Ink arrangement

Also Published As

Publication number Publication date
JPH01317789A (en) 1989-12-22
DE3814049A1 (en) 1989-11-09
US5010817A (en) 1991-04-30
DE58908162D1 (en) 1994-09-15
EP0339409A2 (en) 1989-11-02
JP2806968B2 (en) 1998-09-30
EP0339409A3 (en) 1991-08-07

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