EP0242648A2 - Dispositif d'encrage pour une rotative d'impression planographique - Google Patents

Dispositif d'encrage pour une rotative d'impression planographique Download PDF

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Publication number
EP0242648A2
EP0242648A2 EP87104792A EP87104792A EP0242648A2 EP 0242648 A2 EP0242648 A2 EP 0242648A2 EP 87104792 A EP87104792 A EP 87104792A EP 87104792 A EP87104792 A EP 87104792A EP 0242648 A2 EP0242648 A2 EP 0242648A2
Authority
EP
European Patent Office
Prior art keywords
roller
inking unit
stamp
unit according
holder
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Withdrawn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
EP87104792A
Other languages
German (de)
English (en)
Other versions
EP0242648A3 (fr
Inventor
Hermann Fischer
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 EP0242648A2 publication Critical patent/EP0242648A2/fr
Publication of EP0242648A3 publication Critical patent/EP0242648A3/fr
Withdrawn legal-status Critical Current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
    • B41F31/00—Inking arrangements or devices
    • B41F31/15—Devices for moving vibrator-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices

Definitions

  • the invention relates to an inking unit for a rotary flat printing machine with an ink fountain roller, a plurality of transfer and friction rollers and at least one application roller, and a device for uniformizing the color relief on the application roller.
  • Such an inking unit is known from DE-OS 20 52 806.
  • a doctor blade from which the doctored ink is fed to a collecting container, is assigned to several friction rollers interacting with an application roller.
  • Much more ink is supplied from the ink fountain than the plate needs for printing.
  • a considerably thicker layer of ink than required is applied to the application roller. This ink layer is split on the downstream rubbing rollers. The ink removed from the application roller by the friction rollers is scraped off and returned to the collecting container.
  • a disadvantage of this inking unit is, on the one hand, that the metering of the amount of ink actually required for printing cannot be carried out by the ink knife suitable for precise metering or the cycle times of the lifting roller on the ink fountain roller. Rather, this must be done by multiple color splitting between the applicator roller and the friction rollers.
  • the ink splitting does not completely eliminate a relief present on the applicator roller, since the ink layer on the applicator roller splits into two equally strong sub-layers on each friction roller, so that in principle a relief is retained.
  • the invention has for its object to develop an inking unit of the type mentioned in such a way that with precise meterability of those to be applied to the plate cylinder Any amount of color relief that occurs.
  • the inking unit shown in FIG. 1 comprises an ink fountain 1 with an ink fountain roller 2 and an ink knife 3.
  • a lifting roller 4 interacts with the ink fountain roller 3, which transfers the ink to a rubbing roller 5.
  • the inking unit also has a number of transfer rollers 6, friction rollers 7 and applicator rollers 8, 9.
  • the arrangement of the rollers of the inking unit is of no importance for the invention; for example, a differently designed lifter inking unit or a film inking unit could also be equipped according to the invention.
  • the application rollers 8, 9 transfer the ink to a plate cylinder 10 rotating in the direction of arrow a.
  • a stamp 11 can be set tangentially in the direction of arrow b to the application roller 9, which supplies ink to the plate cylinder as the last one of the application rollers 8, 9.
  • the stamp 11 extends over the entire length of the application roller 9 and has a T-shaped cross section with a flat contact surface 12 facing the application roller 9.
  • a carrier 14 is fastened at its two ends to a side wall 13 in which the rollers of the inking unit are mounted. Between two side parts 15 of the carrier 14, a holder 16 is mounted so as to be movable radially to the application roller 9. One end of a pressure spring 17, the other end of which rests on an abutment 18, is supported on the holder 16. The abutment 18 is screwed into a continuous thread of the carrier 14. By further screwing in or out the abutment 18, the force exerted by the pressure spring 17 on the holder 16 can be changed.
  • the holder 16 has two side parts 19.
  • a roller 20 is mounted on each of the two side parts 19.
  • the two rollers 20 are thus under the action of the pressure spring 17 on the stamp 11 and press it against the applicator roller 9.
  • the holder 16 carries two further rollers 21 indicated by dashed lines, which abut on both sides of the T-shaped middle piece of the holder 11 and thus its lateral Prevent displacement.
  • a further roller 22 is mounted on the underside of the stamp 11, which engages in a curved groove guide 23 of a flange 24 fixedly connected to the applicator roller 9.
  • On the holder 14 there are also a bottom part 25, which prevents the stamp 11 from falling out of the holder 15, and a front plate 26, which secures the holder 16 against displacements parallel to the axis of the application roller 9.
  • the applicator roller 9 supplies the plate cylinder 10 with the most color, it is sufficient to assign the stamp to this roller. In principle, however, there is the possibility of also assigning a stamp 11 to further application rollers.
  • the cam-groove guide 23 together with the roller 22 ensures a back and forth movement of the stamp 11 which runs parallel to the axis of the roller 9.
  • this is not absolutely necessary, since in some cases it is the only one Pressure of the stamp 11 against an applicator roller 9 can produce a sufficiently uniform ink layer on this roller.
  • the ink knife 3 and the ink fountain roller 2 can be adjusted very simply and precisely via the cycle times of the lifting roller 4 or in film inking units.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Screen Printers (AREA)
EP87104792A 1986-04-24 1987-04-01 Dispositif d'encrage pour une rotative d'impression planographique Withdrawn EP0242648A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863613877 DE3613877A1 (de) 1986-04-24 1986-04-24 Farbwerk fuer eine rotationsflachdruckmaschine
DE3613877 1986-04-24

Publications (2)

Publication Number Publication Date
EP0242648A2 true EP0242648A2 (fr) 1987-10-28
EP0242648A3 EP0242648A3 (fr) 1989-04-26

Family

ID=6299439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104792A Withdrawn EP0242648A3 (fr) 1986-04-24 1987-04-01 Dispositif d'encrage pour une rotative d'impression planographique

Country Status (4)

Country Link
US (1) US4753166A (fr)
EP (1) EP0242648A3 (fr)
JP (1) JPS62257850A (fr)
DE (1) DE3613877A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796530A (en) * 1987-06-01 1989-01-10 Pathfinder Graphic Associates Inc. Oscillating roll for printing presses
US4934305A (en) * 1989-06-13 1990-06-19 Dahlgren International, Inc. Retractable coater assembly including a coating blanket cylinder
US5178678A (en) * 1989-06-13 1993-01-12 Dahlgren International, Inc. Retractable coater assembly including a coating blanket cylinder
US5630363A (en) 1995-08-14 1997-05-20 Williamson Printing Corporation Combined lithographic/flexographic printing apparatus and process
JP4896461B2 (ja) * 2004-08-04 2012-03-14 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト 印刷機

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE238850C (fr) *
DE346247C (de) * 1920-04-23 1921-12-28 Albert & Cie A G Farbwerk fuer Druckmaschinen
GB256703A (en) * 1925-05-14 1926-08-16 Isaac Charles Squier Improvements in inking mechanism for printing presses
US1942490A (en) * 1932-09-23 1934-01-09 Hugh T Quigley Ink double-rolling control
US2076203A (en) * 1934-12-21 1937-04-06 Mailander Willy Photogravure plate printing press
US2318504A (en) * 1938-12-09 1943-05-04 Frederick W Lodding Doctor operating mechanism for rolls and cylinders
DE2052806A1 (de) * 1970-10-28 1972-05-04 Koenig & Bauer Schnellpressfab Farbwerk fur Druckmaschinen
DE2243248A1 (de) * 1972-09-02 1974-03-21 Roland Offsetmaschf Farbwerk an bogen verarbeitenden maschinen, insbesondere offsetmaschinen
DE2509837A1 (de) * 1974-04-24 1975-11-06 Xerox Corp Verfahren zum farbtraenken einer oberflaeche
CH583097A5 (fr) * 1975-05-05 1976-12-31 Wifag Maschf
US4126091A (en) * 1976-12-21 1978-11-21 Cohen Abraham N Fountain blade and apparatus for calibrating the same
DE2658362C3 (de) * 1976-12-23 1984-08-09 Hinterkopf, Kurt G., Dipl.-Ing. (FH), 7332 Eislingen Farbwerk für eine Druckmaschine, insbesondere zum Bedrucken von Tuben, Hülsen u.dgl.
US4151797A (en) * 1977-05-04 1979-05-01 Mid America Tag And Label Company, Inc. Doctor blade apparatus
US4354449A (en) * 1978-07-03 1982-10-19 The Black Clawson Company Two sided coater
DE2902230A1 (de) * 1979-01-20 1980-07-24 Maschf Augsburg Nuernberg Ag Farbwerk
DE3028406C2 (de) * 1980-07-26 1983-09-15 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Vorrichtung zum axialen Hin- und Herbewegen von Reibwalzen im Farbwerk von Druckmaschinen
DD154530A5 (de) * 1980-11-05 1982-03-31 Dahlgren Mfg Co Verfahren und vorrichtung zum dosieren von druckfarbe
US4398463A (en) * 1981-08-19 1983-08-16 Motter Printing Press Co. Non-repeat doctor blade drive
DE3225378A1 (de) * 1982-07-07 1984-01-12 Koenig & Bauer AG, 8700 Würzburg Farbwerk
DE3324893C1 (de) * 1983-07-09 1985-03-14 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Vorrichtung zum Dosieren der Farbe bei Offsetdruckmaschinen
DE3344778C1 (de) * 1983-12-10 1985-04-11 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbdosiervorrichtung für das Farbwerk einer Durckmaschine

Also Published As

Publication number Publication date
EP0242648A3 (fr) 1989-04-26
DE3613877A1 (de) 1987-10-29
DE3613877C2 (fr) 1988-09-01
JPS62257850A (ja) 1987-11-10
US4753166A (en) 1988-06-28

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Inventor name: FISCHER, HERMANN