EP0407922A2 - Paire de rouleaux pour le dispositif de mouillage d'une machine à imprimer offset - Google Patents

Paire de rouleaux pour le dispositif de mouillage d'une machine à imprimer offset Download PDF

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Publication number
EP0407922A2
EP0407922A2 EP90113001A EP90113001A EP0407922A2 EP 0407922 A2 EP0407922 A2 EP 0407922A2 EP 90113001 A EP90113001 A EP 90113001A EP 90113001 A EP90113001 A EP 90113001A EP 0407922 A2 EP0407922 A2 EP 0407922A2
Authority
EP
European Patent Office
Prior art keywords
roller
pair
transfer roller
rollers
application
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.)
Withdrawn
Application number
EP90113001A
Other languages
German (de)
English (en)
Other versions
EP0407922A3 (en
Inventor
Paul Abendroth
Herbert Rebel
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 EP0407922A2 publication Critical patent/EP0407922A2/fr
Publication of EP0407922A3 publication Critical patent/EP0407922A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/26—Damping devices using transfer rollers

Definitions

  • the invention relates to a pair of rollers for the dampening unit of an offset printing machine according to the preamble of the first claim for protection.
  • Such a pair of rollers for the dampening unit of an offset printing press is known from DE-PS 1 940 661.
  • the applicator roller is driven by a pair of gears attached to the transfer roller and the applicator roller.
  • This type of drive harbors the risk of toothed strips on the print carrier, which run parallel to the axis of the plate cylinder and have the same distance, which corresponds to the pitch of the gears of the positive-locking rotary drive and is caused by backlash.
  • the appearance of stencils can also be caused by the dampening system on the printed image and thus deteriorate its quality.
  • the invention has for its object to design the generic pair of rollers for the dampening unit of an offset printing press so that a high-quality print image can be achieved, which is free from toothed strips as well as from stenciling by the dampening solution application.
  • An elastic application roller 1 of the dampening unit rolls according to FIG. 1 on the circumference of a plate cylinder 3 of an offset printing machine.
  • the dampening liquid is fed to the applicator roller 1 from a container in which a duct roller 5 is immersed, the speed of which can be regulated.
  • This conveys the dampening fluid via an elastic intermediate roller 6 and an inelastic transfer roller 7 to the applicator roller 1, which applies the dampening fluid to the pressure plate of the plate cylinder 3.
  • the transfer roller 7 is driven positively according to FIG. 2 via a gear 9 which meshes on the one hand with a gear 8 attached to the plate cylinder 3 and on the other hand with a gear 10 attached to the transfer roller 7.
  • the application roller 1 is driven via a gearwheel pair 11, 2 fastened to the transfer roller 7 and the application roller 1.
  • the duct roller 5 is driven by a geared motor 4 in a known manner.
  • the applicator roller 1 is attached to the pair of gears 11, 2 attached to the transfer roller 7 and the applicator roller 1 Transfer roller 7 ago driven with a peripheral speed increased by about 3% compared to the plate cylinder 3.
  • the transfer roller 7 carries a gear 11 with a larger diameter, which meshes with a gear 2 arranged on the application roller 1, the diameter of which is smaller than the roller diameter.
  • the application roller 1 is driven faster by the amount corresponding to the gear ratio, the transfer roller 7 rotating at the plate cylinder peripheral speed.
  • the difference in speed between the lateral surfaces of the application roller 2 and the plate cylinder 3 or the transfer roller 7 not only causes the dampening unit to work without stenciling, but also prevents the formation of toothed strips on the surface as a result of only a slight sliding of the lateral surfaces Print carrier.
  • the printing plate on the plate cylinder 3 cleans because of the difference in speed to the applicator roller 1. Another advantage is that an extremely stable damp film is formed on the printing plate, which does not tear off so easily.
  • the transfer roller 7 is expediently designed as a distribution roller which carries out an axial reciprocating movement, for which purpose, in addition to the rotary drive 8 to 10, an oscillating drive 12 which effects an axial reciprocating movement is required. If this traversing drive 12 is arranged as far as possible at the end of the drive train, it also has a vibration-damping effect. This can be done, for example, by arranging the traversing drive 12 on the journal of the applicator roller on which the toothed wheel 2 is seated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
EP19900113001 1989-07-14 1990-07-07 Pair of rollers for the damping device of an offset printing machine Withdrawn EP0407922A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8908597U 1989-07-14
DE8908597U DE8908597U1 (de) 1989-07-14 1989-07-14 Walzenpaar für das Feuchtwerk einer Offestdruckmaschnine

Publications (2)

Publication Number Publication Date
EP0407922A2 true EP0407922A2 (fr) 1991-01-16
EP0407922A3 EP0407922A3 (en) 1991-05-02

Family

ID=6841094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900113001 Withdrawn EP0407922A3 (en) 1989-07-14 1990-07-07 Pair of rollers for the damping device of an offset printing machine

Country Status (4)

Country Link
EP (1) EP0407922A3 (fr)
JP (1) JPH03114835A (fr)
BR (1) BR9003376A (fr)
DE (1) DE8908597U1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001353839A (ja) * 2000-04-14 2001-12-25 Komori Corp 印刷機械におけるローラの構造
JP2007319208A (ja) * 2006-05-30 2007-12-13 Showa Kikai Kogyosho:Kk ヘッディング等の練習機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2213851A1 (fr) * 1973-01-16 1974-08-09 Maschf Augsburg Nuernberg Ag
DE2822350A1 (de) * 1977-05-31 1978-12-07 Nebiolo Spa Feuchtwerk fuer flachdruckmaschinen
GB2151186A (en) * 1983-12-12 1985-07-17 Baldwin Technology Corp Dampening system
US4809606A (en) * 1987-06-19 1989-03-07 Airsystems Inc. Oscillating form roller and apparatus and method for controlling the oscillation thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1918245U (de) * 1962-02-09 1965-06-24 Maschf Augsburg Nuernberg Ag Farbwerk fuer rotationsdruckmaschinen.
DE1940661C3 (de) * 1969-08-09 1973-07-12 Roland Offsetmaschf Feuchteinrichtung fuer lithographische Druckmaschinen
DE1951976A1 (de) * 1969-10-15 1971-04-22 Roland Offsetmaschf Feuchteinrichtung fuer lithographische Druckmaschinen
GB2082121B (en) * 1980-08-14 1984-11-28 Komori Printing Mach Water supply apparatus for printing press
JPS6482947A (en) * 1988-02-27 1989-03-28 Jpe Kk Humidifier of printing press
DE3832527A1 (de) * 1987-09-29 1989-04-13 Jpe Kk Befeuchtungssystem fuer eine offsetdruckmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2213851A1 (fr) * 1973-01-16 1974-08-09 Maschf Augsburg Nuernberg Ag
DE2822350A1 (de) * 1977-05-31 1978-12-07 Nebiolo Spa Feuchtwerk fuer flachdruckmaschinen
GB2151186A (en) * 1983-12-12 1985-07-17 Baldwin Technology Corp Dampening system
US4809606A (en) * 1987-06-19 1989-03-07 Airsystems Inc. Oscillating form roller and apparatus and method for controlling the oscillation thereof

Also Published As

Publication number Publication date
BR9003376A (pt) 1991-08-27
EP0407922A3 (en) 1991-05-02
DE8908597U1 (de) 1989-08-31
JPH03114835A (ja) 1991-05-16

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