EP0422593A1 - Dispositif pour enlever des particules étrangères de la périphérie d'un cylindre porte-plaque d'une machine d'impression - Google Patents

Dispositif pour enlever des particules étrangères de la périphérie d'un cylindre porte-plaque d'une machine d'impression Download PDF

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Publication number
EP0422593A1
EP0422593A1 EP90119358A EP90119358A EP0422593A1 EP 0422593 A1 EP0422593 A1 EP 0422593A1 EP 90119358 A EP90119358 A EP 90119358A EP 90119358 A EP90119358 A EP 90119358A EP 0422593 A1 EP0422593 A1 EP 0422593A1
Authority
EP
European Patent Office
Prior art keywords
scraper
plate cylinder
periphery
printing machine
preset
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
EP90119358A
Other languages
German (de)
English (en)
Other versions
EP0422593B1 (fr
Inventor
Claus Simeth
Karl-Heinz Sellmann
Reinhold Hanske
Dieter Dipl.-Ing. Bachmann
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 Miller Druckmaschinen GmbH
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 Miller Druckmaschinen GmbH, MAN Roland Druckmaschinen AG filed Critical MAN Miller Druckmaschinen GmbH
Publication of EP0422593A1 publication Critical patent/EP0422593A1/fr
Application granted granted Critical
Publication of EP0422593B1 publication Critical patent/EP0422593B1/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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/02—Cleaning arrangements or devices for forme cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/40—Cleaning restricted areas on cylinders

Definitions

  • the invention relates to an inking unit of a printing press with a plate cylinder, on the circumference of which a scraper which is adjustable in the axial direction of the plate cylinder can be brought into abutment to remove dirt particles adhering there.
  • Dirt particles adhering to the plate cylinder of an inking unit of a printing press are problematic because they result in corresponding imperfections in the printed image.
  • the dirt particles, also called parasites, must therefore be removed from the plate cylinder as soon as the printer detects the occurrence of such parasites in the printed image.
  • the invention is therefore based on the object of proposing an inking unit with the features mentioned at the outset, which is distinguished by a noticeably reduced time which elapses between the discovery of such a parasite and its removal by the scraper.
  • Feature a will be used if the print image in question has areas of different color density for the color in question, viewed side by side in the running direction of the machine. It is known from experience that with such printed images in the areas of greater color density there is a greater probability of the occurrence of the parasites and this information known to the color scanner is therefore used for the method according to the invention for presetting the scraper.
  • the method according to feature b) will be chosen if there is essentially the same color distribution over the sheet width in the inking unit in question, so that the occurrence of the parasites over the sheet width (in the axial direction of the plate cylinder) is approximately equally likely at every point.
  • the setting provided here in the central area of the plate cylinder and thus the print image also noticeably minimizes the distances compared to the prior art, where this "parking position" was provided on the edge of the print image.
  • the feature c) takes advantage of the knowledge that - provided the same print image is present - the parasites generally appear in the same axial position in large numbers and the learning algorithm is used to inform the controller of this position, in which the parasites occur in large numbers and the scraper is preset to this position. This also results in a noticeable shortening of the distances and thus the times required for the presetting.
  • the presetting according to feature c) via the learning algorithm thus makes use of presets from the past which were either started manually or via the feature a) and / or the feature b).
  • FIG. 1 A section of an inking unit of a printing press is shown schematically in FIG. 1.
  • a rubber cylinder 1 abuts a plate cylinder 2.
  • the cylinders rotate in the direction of the arrows 3.
  • Rollers 4 of a dampening unit and inking rollers lie on the plate cylinder.
  • a scraper 5 lies on the circumference of the plate cylinder 2.
  • the scraper can via a servomotor 6 in the direction of Arrow 7 are moved along the plate cylinder.
  • the scraper sits on a rod or spindle 8 which is held on frame parts 9.
  • the axial position of the scraper 5 in the direction of the double arrow 7 is preset according to the inventive method, as explained at the beginning. If the printer now detects the presence of a dirt particle or parasite on the print image, he only needs to adjust the scraper finely to the position in question and he can then bring the scraper with its tip into contact with the plate cylinder 2 so that the dirt particle is then removed there. The scraper then moves back again and into its starting position specified by the control system according to the invention.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP90119358A 1989-10-09 1990-10-09 Dispositif pour enlever des particules étrangères de la périphérie d'un cylindre porte-plaque d'une machine d'impression Expired - Lifetime EP0422593B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3933677A DE3933677A1 (de) 1989-10-09 1989-10-09 Farbwerk einer druckmaschine mit einem verstellbaren schaber zum entfernen von am plattenzylinder anhaftenden schmutzteilchen
DE3933677 1989-10-09

Publications (2)

Publication Number Publication Date
EP0422593A1 true EP0422593A1 (fr) 1991-04-17
EP0422593B1 EP0422593B1 (fr) 1995-07-19

Family

ID=6391110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119358A Expired - Lifetime EP0422593B1 (fr) 1989-10-09 1990-10-09 Dispositif pour enlever des particules étrangères de la périphérie d'un cylindre porte-plaque d'une machine d'impression

Country Status (5)

Country Link
EP (1) EP0422593B1 (fr)
JP (1) JPH07119113B2 (fr)
AT (1) ATE125204T1 (fr)
DE (3) DE3933677A1 (fr)
WO (1) WO1991004860A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0545646A1 (fr) * 1991-12-03 1993-06-09 Comtec Co., Ltd. Dispositif de nettoyage pour machine à imprimer offset
GB2416134A (en) * 2004-07-13 2006-01-18 Innovation Holdings Apparatus and method for manufacturing concrete

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2347195A1 (fr) * 1976-04-07 1977-11-04 Hitachi Printing Co Dispositif de depoussierage automatique d'un cylindre d'impression d'une imprimeuse
FR2441490A1 (fr) * 1978-11-16 1980-06-13 Salvat Editores Perfectionnements apportes aux moyens d'extraction d'elements etrangers aux plaques d'impression en offset
DE3410376A1 (de) * 1983-03-22 1984-09-27 Dai Nippon Insatsu K.K., Tokyo Einrichtung zum selbsttaetigen entfernen von staub von einem plattenzylinder einer druckpresse
EP0287822A1 (fr) * 1987-04-22 1988-10-26 Werner Grossmann Dispositif pour enlever des particules étrangères du cylindre porte-plaque d'une machine à imprimer offset

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2347195A1 (fr) * 1976-04-07 1977-11-04 Hitachi Printing Co Dispositif de depoussierage automatique d'un cylindre d'impression d'une imprimeuse
FR2441490A1 (fr) * 1978-11-16 1980-06-13 Salvat Editores Perfectionnements apportes aux moyens d'extraction d'elements etrangers aux plaques d'impression en offset
DE3410376A1 (de) * 1983-03-22 1984-09-27 Dai Nippon Insatsu K.K., Tokyo Einrichtung zum selbsttaetigen entfernen von staub von einem plattenzylinder einer druckpresse
EP0287822A1 (fr) * 1987-04-22 1988-10-26 Werner Grossmann Dispositif pour enlever des particules étrangères du cylindre porte-plaque d'une machine à imprimer offset

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0545646A1 (fr) * 1991-12-03 1993-06-09 Comtec Co., Ltd. Dispositif de nettoyage pour machine à imprimer offset
GB2416134A (en) * 2004-07-13 2006-01-18 Innovation Holdings Apparatus and method for manufacturing concrete

Also Published As

Publication number Publication date
EP0422593B1 (fr) 1995-07-19
JPH04500051A (ja) 1992-01-09
DE3933677A1 (de) 1991-04-18
DE59009413D1 (de) 1995-08-24
DE3933677C2 (fr) 1991-09-05
JPH07119113B2 (ja) 1995-12-20
DE3943578A1 (de) 1991-07-18
WO1991004860A1 (fr) 1991-04-18
DE3943578C2 (de) 1994-09-15
ATE125204T1 (de) 1995-08-15

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