EP0570879A2 - Procédé et dispositif pour effacer la couche d'alimentation d'encre sur la surface d'une forme d'impression imagée - Google Patents

Procédé et dispositif pour effacer la couche d'alimentation d'encre sur la surface d'une forme d'impression imagée Download PDF

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Publication number
EP0570879A2
EP0570879A2 EP93107980A EP93107980A EP0570879A2 EP 0570879 A2 EP0570879 A2 EP 0570879A2 EP 93107980 A EP93107980 A EP 93107980A EP 93107980 A EP93107980 A EP 93107980A EP 0570879 A2 EP0570879 A2 EP 0570879A2
Authority
EP
European Patent Office
Prior art keywords
printing form
jet
printing
ink
erasing
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.)
Granted
Application number
EP93107980A
Other languages
German (de)
English (en)
Other versions
EP0570879A3 (en
EP0570879B1 (fr
Inventor
Josef Göttling
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 AG
Original Assignee
MAN Roland Druckmaschinen 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0570879A2 publication Critical patent/EP0570879A2/fr
Publication of EP0570879A3 publication Critical patent/EP0570879A3/de
Application granted granted Critical
Publication of EP0570879B1 publication Critical patent/EP0570879B1/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
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/006—Cleaning, washing, rinsing or reclaiming of printing formes other than intaglio formes
    • 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
    • B41C1/1091—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by physical transfer from a donor sheet having an uniform coating of lithographic material using thermal means as provided by a thermal head or a laser; by mechanical pressure, e.g. from a typewriter by electrical recording ribbon therefor

Definitions

  • the invention relates to a method and a device for repeatedly erasing the ink-carrying layer from the surface of an imaged printing form suitable for offset printing.
  • the ink-carrying layer can also be anchored in the image on the surface of the printing form by means of the ink jet (ink) or an electrostatic method (toner).
  • ink jet ink jet
  • toner electrostatic method
  • a printing cylinder with a ceramic cylinder jacket or a solid ceramic or glass cylinder can also be used as the printing form.
  • printing forms imaged in the manner described above must be regenerated, ie the material forming the printing points must be removed or deleted and, if appropriate, the printing form surface may then additionally be subjected to a hydrophilization treatment.
  • the deletion of the surface of the printing form is usually carried out after the printing process.
  • the inking and dampening unit is first switched off and the remaining remnants of the printing ink on the forme cylinder are removed using the cleaning devices customary in the machine.
  • This method enables reactive erasure of organic substance parts on the surface of the printing form which have been applied to it by means of ink-jet, electrostatic as well as thermal transfer methods.
  • the invention has for its object to develop a method for deleting the ink-carrying layer (layers, inks, toner) for such an illustrated printing form, according to which repeated imaging of the water-carrying layer of the printing form is possible, which is comparatively simpler and a simple one Facility for performing the method allows.
  • Fig. 1 denotes a flat printing plate and thus outside of a printing press
  • 2 denotes an extinguishing device carrying a water jet 3.
  • Very small image elements 4 corresponding in size to a pixel were detached from the coating of a thermal transfer film and placed on the printing form 1. They have solidified on the surface of the printing form 1 and, because of their oleophilic property, form the ink-carrying layer on the water-carrying 5 of the printing form 1.
  • These elements 4 have been greatly enlarged in the drawing in order to be able to represent them at all.
  • the extinguishing device 2 essentially has a nozzle 6, which can be connected using the means of a commercially available high-pressure cleaning system, such as are known, for example, from car washes.
  • the nozzle 6 is directed obliquely onto the surface of the printing form 1, so that the water jet 3 strikes the surface of the printing form 1 at an angle ⁇ , which is less than 90 °.
  • the nozzle 6 can be guided either manually or automatically line by line and lengthwise in the direction of arrow a over the printing form 1, so that the water jet 3 can detach the image elements 4 from the water-bearing layer 5 of the printing form 1.
  • An area 7 that has already been deleted can be seen in the direction of arrow a behind the extinguishing device 2.
  • FIG. 2 A second example of an application of the invention is shown in FIG. 2.
  • a printing form 8 is mounted on a plate cylinder 9, the method for repeatedly erasing the ink-guiding layer, which is represented by the picture elements 10, is thus carried out within the printing press.
  • An erasing device 11 is arranged in the printing press in a printing form width over a region of the surface of the printing form 8.
  • the quenching device 11 has a plurality of nozzles 12 which are arranged in a line across the width of the printing form 8, in an analogous manner to the first example using the means of a commercially available high-pressure cleaning system and a plurality of jets 13 of a medium under pressure, preferably water at an angle at an angle , which is less than 90 ° on the surface of the printing form 8, while the printing form 8 is rotated under the quenching device 11.
  • the arrangement and number of nozzles 12 is selected so that the entire surface of the printing form 8 can be erased.
  • the nozzles 12 of the extinguishing device 11 have an encapsulation which is open towards the printing form 8 and protects the environment, the capsule 14 defining a working space 15 and being provided with a further opening 16 for disposal of the water introduced into the working space 15 and the removed coating.
  • the opening 16 is usually via a nozzle 17 to a pump, not shown connectable.
  • the capsule 14 is advantageously provided with suitable sealing elements 18 for placement on the printing form 8.
  • the advantageous sealing of the working space 15 against the printing form 8 takes place in the manner known from the sealing technology of rotary unions, for example in the form of sliding seals or through the use of ferrofluids.
  • the erasing device with its sealing elements is lifted off the printing form.
  • the arrangement of the extinguishing device is possible at all freely accessible locations on the circumference of the printing form cylinder (eg also "overhead”)
  • the medium preferably water
  • the medium is held in the extinguishing device 2 or 11 at least under a pressure which is greater than 5 bar.
  • a pressure which is greater than 5 bar.
  • the ink-carrying layer can be removed quickly and completely, preferably at a pressure of 100 bar and a water temperature of approximately 90.degree.
  • this can be done in a known manner by means of one or more radiation sources arranged in the interior of the plate cylinder 9, which are directed onto the inner lateral surface of the printing form 8 and cause the temperature on the surface of the printing form 8 to rise almost to the melting point of the substance forming the picture elements can.
  • the plate cylinder will advantageously be made of glass or glass ceramic.
  • the erasing device 2, 11 can be raised far from the printing form surface, so that there is always space for, for example, a CPT imaging unit in the printing press.
  • a gravure cylinder filled by a thermal transfer method can also be erased, that is to say the surface of the cylinder which is completely provided with cups and is filled with an organic substance in non-image-bearing areas.

Landscapes

  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Ink Jet (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Rotary Presses (AREA)
  • Cleaning In Electrography (AREA)
EP93107980A 1992-05-20 1993-05-17 Procédé et dispositif pour effacer la couche d'alimentation d'encre sur la surface d'une forme d'impression imagée Expired - Lifetime EP0570879B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4216636 1992-05-20
DE4216636A DE4216636C2 (de) 1992-05-20 1992-05-20 Verfahren und Vorrichtung zum Löschen und Hydrophilieren einer mittels eines Thermotransverfahrens bebilderten Druckform

Publications (3)

Publication Number Publication Date
EP0570879A2 true EP0570879A2 (fr) 1993-11-24
EP0570879A3 EP0570879A3 (en) 1994-08-03
EP0570879B1 EP0570879B1 (fr) 1997-01-02

Family

ID=6459306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107980A Expired - Lifetime EP0570879B1 (fr) 1992-05-20 1993-05-17 Procédé et dispositif pour effacer la couche d'alimentation d'encre sur la surface d'une forme d'impression imagée

Country Status (4)

Country Link
EP (1) EP0570879B1 (fr)
JP (1) JP3361145B2 (fr)
CA (1) CA2096170C (fr)
DE (2) DE4216636C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0813957A2 (fr) * 1996-06-19 1997-12-29 MAN Roland Druckmaschinen AG Procédé et appareil pour l'impression en creux utilisant une forme effaçable
EP0965444A1 (fr) * 1998-06-17 1999-12-22 Scitex Corporation Ltd. Système et méthode pour l'impression lithographique utilisant des supports à surface réutilisable
US6525008B2 (en) 1999-12-24 2003-02-25 Man Roland Druckmaschinen Ag Cleaning composition for printing presses
WO2003070481A1 (fr) * 2002-02-19 2003-08-28 OCé PRINTING SYSTEMS GMBH Procede et equipement d'impression selon lequel on applique une substance favorisant le mouillage avant d'appliquer la couche repoussant l'encre ou absorbant l'encre
WO2004108416A1 (fr) * 2003-06-05 2004-12-16 Omet Srl Procede et dispositif de nettoyage du cylindre d'une presse d'impression
WO2005084951A1 (fr) * 2004-03-04 2005-09-15 Perini, Fabio Dispositif, necessaire et procede destines a nettoyer des rouleaux dans des machines d'impression

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4426012C2 (de) * 1994-07-22 1998-05-20 Roland Man Druckmasch Löschbare Druckform, ihre Verwendung sowie Verfahren zum Löschen und Regenerieren der Druckform
US5816161A (en) * 1994-07-22 1998-10-06 Man Roland Druckmaschinen Ag Erasable printing plate having a smooth pore free metallic surface
DE4433834C1 (de) 1994-09-22 1995-10-12 Daimler Benz Ag Verfahren zur Rückgewinnung von Sekundärpolyolen aus mit nichtglykolysierbaren Stoffen vermischten Polyaddukten von Diolen und Diisocyanaten
US6631676B2 (en) * 1995-02-07 2003-10-14 Man Roland Druckmaschinen Ag Process and apparatus for gravure
DE29507416U1 (de) * 1995-05-04 1995-07-06 MAN Roland Druckmaschinen AG, 63075 Offenbach Einrichtung zum Reinigen von farbübertragenden Zylindern
DE19600846C1 (de) * 1996-01-12 1997-04-03 Heidelberger Druckmasch Ag Vorrichtung zur Reinigung direkt bebilderter Druckformen in einer Druckmaschine
DE19600844A1 (de) * 1996-01-12 1997-07-17 Heidelberger Druckmasch Ag Vorrichtung zur Reinigung direkt bebilderter Druckformen in einer Druckmaschine
DE19826377A1 (de) * 1998-06-12 1999-12-16 Heidelberger Druckmasch Ag Druckmaschine und Druckverfahren
DE10037998A1 (de) * 2000-08-04 2002-02-14 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zum Löschen einer wiederbebilderbaren Druckform
DE10054284B4 (de) * 2000-11-02 2010-04-08 Manroland Ag Verfahren zur Behandlung einer löschbaren lithographischen Druckform
DE102004006629B3 (de) * 2004-02-10 2005-11-17 Sundwig Gmbh Vorrichtung zum Reinigen der Oberfläche von zylindrischen Körpern, wie Walzen oder Rollen
DE102004028552A1 (de) * 2004-06-15 2006-01-05 Robo Paper B.V. Vorrichtung mit Waschdüsen und Verfahren zum Reinigen einer umlaufenden Auftragseinrichtung
DE102015200114B4 (de) * 2015-01-08 2018-12-20 Koenig & Bauer Ag Verfahren zum Wiederbenutzen einer Druckplatte

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2356771A (en) * 1942-01-03 1944-08-29 Rex V Mckinley Stencil washing apparatus
DE1013667B (de) * 1955-05-23 1957-08-14 Jaenecke Schneemann K G Druckf Vorrichtung zum Reinigen von Druckwalzen
DE2539025A1 (de) * 1974-09-02 1976-03-11 Australia Res Lab Verfahren zur herstellung von wiederverwendbaren lithographiedruckoberflaechen
DE3713801A1 (de) * 1987-04-24 1988-11-10 Forschungsgesellschaft Fuer Dr Druckform-material fuer den flachdruck
EP0523584A1 (fr) * 1991-07-19 1993-01-20 MAN Roland Druckmaschinen AG Procédé pour la régénération de formes d'impression offset avec image directe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE260971C (fr) * 1912-05-25
DE3248178C2 (de) * 1982-12-27 1987-02-19 Forschungsgesellschaft Druckmaschinen E.V., 6000 Frankfurt Bildmäßige Beschichtung von Druckformen für den Flachdruck

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2356771A (en) * 1942-01-03 1944-08-29 Rex V Mckinley Stencil washing apparatus
DE1013667B (de) * 1955-05-23 1957-08-14 Jaenecke Schneemann K G Druckf Vorrichtung zum Reinigen von Druckwalzen
DE2539025A1 (de) * 1974-09-02 1976-03-11 Australia Res Lab Verfahren zur herstellung von wiederverwendbaren lithographiedruckoberflaechen
DE3713801A1 (de) * 1987-04-24 1988-11-10 Forschungsgesellschaft Fuer Dr Druckform-material fuer den flachdruck
EP0523584A1 (fr) * 1991-07-19 1993-01-20 MAN Roland Druckmaschinen AG Procédé pour la régénération de formes d'impression offset avec image directe

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0813957A2 (fr) * 1996-06-19 1997-12-29 MAN Roland Druckmaschinen AG Procédé et appareil pour l'impression en creux utilisant une forme effaçable
EP0813957B1 (fr) * 1996-06-19 2001-11-28 MAN Roland Druckmaschinen AG Procédé et appareil pour l'impression en creux utilisant une forme effaçable
EP0965444A1 (fr) * 1998-06-17 1999-12-22 Scitex Corporation Ltd. Système et méthode pour l'impression lithographique utilisant des supports à surface réutilisable
US6525008B2 (en) 1999-12-24 2003-02-25 Man Roland Druckmaschinen Ag Cleaning composition for printing presses
WO2003070481A1 (fr) * 2002-02-19 2003-08-28 OCé PRINTING SYSTEMS GMBH Procede et equipement d'impression selon lequel on applique une substance favorisant le mouillage avant d'appliquer la couche repoussant l'encre ou absorbant l'encre
US7191705B2 (en) 2002-02-19 2007-03-20 Oce Printing Systems Gmbh Printing device and method, in which a humidity promoter is applied prior to the ink-repellent or ink-receptive layer
WO2004108416A1 (fr) * 2003-06-05 2004-12-16 Omet Srl Procede et dispositif de nettoyage du cylindre d'une presse d'impression
CN100431837C (zh) * 2003-06-05 2008-11-12 奥梅特有限公司 清洁印刷机滚筒的方法和装置
WO2005084951A1 (fr) * 2004-03-04 2005-09-15 Perini, Fabio Dispositif, necessaire et procede destines a nettoyer des rouleaux dans des machines d'impression
US7428868B2 (en) 2004-03-04 2008-09-30 Fabio Perini Device, kit and method for cleaning rolls in printing machines

Also Published As

Publication number Publication date
EP0570879A3 (en) 1994-08-03
DE59304938D1 (de) 1997-02-13
CA2096170A1 (fr) 1993-11-21
JPH0647891A (ja) 1994-02-22
DE4216636C2 (de) 1995-11-23
EP0570879B1 (fr) 1997-01-02
JP3361145B2 (ja) 2003-01-07
CA2096170C (fr) 1996-10-15
DE4216636A1 (de) 1993-11-25

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