EP0389740B1 - Feuchtwerk - Google Patents

Feuchtwerk Download PDF

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Publication number
EP0389740B1
EP0389740B1 EP90100489A EP90100489A EP0389740B1 EP 0389740 B1 EP0389740 B1 EP 0389740B1 EP 90100489 A EP90100489 A EP 90100489A EP 90100489 A EP90100489 A EP 90100489A EP 0389740 B1 EP0389740 B1 EP 0389740B1
Authority
EP
European Patent Office
Prior art keywords
roller
damping unit
damping
constructed
unit according
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
EP90100489A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0389740A2 (de
EP0389740A3 (de
Inventor
Roland Höll
Herbert Rebel
Peter Hummel
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
Priority to AT90100489T priority Critical patent/ATE91965T1/de
Publication of EP0389740A2 publication Critical patent/EP0389740A2/de
Publication of EP0389740A3 publication Critical patent/EP0389740A3/de
Application granted granted Critical
Publication of EP0389740B1 publication Critical patent/EP0389740B1/de
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
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/36—Inking-rollers serving also to apply ink repellants
    • 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
    • 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 dampening system of an offset printing machine according to the preamble of the first claim.
  • a dampening unit of the type specified above is known from DE-OS 2 909 765.
  • This dampening unit has a dampening solution feed roller which forms both a metering gap for the application roller of the dampening unit and a preceding metering gap for a further dampening unit roller.
  • Special measures against stenciling are not provided, so that with such dampening systems there is a risk that a stenciling effect on the applicator roller may occur as a result of plate cylinder channel reactions, particularly in the case of difficult printing forms.
  • the object of the invention is to provide a dampening system in which the dampening solution supply roller has an axial rubbing point on the applicator roller for eliminating dampening agent interference screens, without at the same time forming a second rubbing point with an upstream dampening unit roller which has a metering gap with the dampening solution supply roller.
  • the advantage of the invention is that only in the one metering gap 1b of the dampening solution supply roller to the applicator roller for eliminating jamming patterns, axial rubbing and metering of dampening solution are coupled to one another, while in the upstream metering gap 1a of the dampening solution supply roller to the upstream dampening unit roller Dampening solution can be dosed unaffected by axial rubbing, which leads to an improvement in the printing result.
  • the dampening unit shown in FIG. 1 has an applicator roller 2, which rests on a plate cylinder 1 with its elastic surface. Oleophilic intermediate rollers 5, 6 establish a connection to inking rollers 7, 8 of an inking unit.
  • the ink cylinder 8 is supplied with ink via rollers (not shown) which are known per se from an ink supply and is passed on to application rollers 7 connected in series on the plate cylinder 1.
  • a further dampening unit roller 27 designed as a water tank roller is partially immersed in a water tank which absorbs dampening liquid. It has an elastic surface, for example made of rubber.
  • dampening agent supply roller 28 which is designed as a transfer roller and has a metallic, water-accepting surface.
  • the dampening unit shown in FIG. 2 in contrast to the type of dampening unit shown in FIG. 1, has a further dampening unit roller 4 designed as a metering roller and a dampening unit feed roller 3 configured as a water box roller, which is positioned directly on the application roller 2 in the operating position, the thickness of the dampening film being determined by the further dampening unit roller 4, which is arranged as a metering roller and is arranged on the dampening agent supply roller 3 in the circumferential direction before the line of contact with the applicator roller 2, can be determined.
  • a metering gap 1b for application roller 2 and a metering gap 1a upstream of this are provided.
  • the crossmember 17 has a pin-like extension 25 on both sides, which is guided axially movably in a ball sleeve 13 in the machine side walls 15. Furthermore, one of the axes 22, 24 has a metering gap 1a forming dampening solution supply rollers 3 or 28 and 4 or 27 on both sides on a pin-like extension 23 which is also axially movable in a ball sleeve 13 in the machine side walls 15.
  • an axial movement of the support frame 14, 17, 22 is initiated via a friction lever 20 and a driving roller 21 which runs in a link 19 of the extension 23.
  • the drive of the friction lever 20 can be achieved, for example, by means of a drive rod 16 which can be driven in a manner known per se from the machine drive or, if appropriate, also from a traversing drive of the inking unit.
  • the axes 22, 24 are rotatably but axially immovably mounted in the associated carrier 14.
  • the fixation in the axial direction takes place e.g. via locking rings that secure the outer and inner rings of the roller bearings 26 on the axles 22, 24.
  • the axle 24 is mounted at both ends in an eccentric bearing 10, which is arranged in the carrier 14.
  • the further dampening unit roller 4 which is designed as a metering roller, can, like the further dampening unit roller 27, designed as a water tank roller, be designed in a manner known per se.
  • basic suggestions are provided in DE-PS 2 054 678, with the axis 24 not having to be supported on one side in the carrier 14, but in a special lever which is pivoted relative to the carrier 14 by an adjusting device such that the axes 22, 24 are inclined to each other. This is not shown in the drawing.
  • the axis 22 of the dampening agent supply roller 3 and 28 is opposite to the drive mechanism 16, 19, 20, 21 for the axial back and forth movement by means of an electric motor 9, which is independent of the machine and can be regulated separately in speed, via a gear 18, 29 in the circumferential direction drivable.
  • the gear 18 on the axis 22 must be provided with straight teeth, since this gear 18 carries out the back and forth movement of the support frame 14, 17, 22.
  • separation points can be provided in the axis 22 or the cross member 17 in a known manner.
  • the metering gap 1 a can be both adjusted and turned on and off by means of the rotatable eccentric bushings 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP90100489A 1989-03-25 1990-01-11 Feuchtwerk Expired - Lifetime EP0389740B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90100489T ATE91965T1 (de) 1989-03-25 1990-01-11 Feuchtwerk.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3909985 1989-03-25
DE3909985A DE3909985C1 (enrdf_load_stackoverflow) 1989-03-25 1989-03-25

Publications (3)

Publication Number Publication Date
EP0389740A2 EP0389740A2 (de) 1990-10-03
EP0389740A3 EP0389740A3 (de) 1991-05-02
EP0389740B1 true EP0389740B1 (de) 1993-07-28

Family

ID=6377292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100489A Expired - Lifetime EP0389740B1 (de) 1989-03-25 1990-01-11 Feuchtwerk

Country Status (4)

Country Link
EP (1) EP0389740B1 (enrdf_load_stackoverflow)
AT (1) ATE91965T1 (enrdf_load_stackoverflow)
DE (2) DE3909985C1 (enrdf_load_stackoverflow)
ES (1) ES2044240T3 (enrdf_load_stackoverflow)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE368091C (de) * 1923-02-01 Bautzner Ind Akt Ges Feuchtwerk fuer Rotationsgummidruckmaschinen
GB871786A (en) * 1957-01-18 1961-06-28 Maschf Augsburg Nuernberg Ag Damping apparatus for rotary printing presses
DE2054678C3 (de) * 1970-11-06 1975-05-22 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Feuchtwerk für lithographische Druckmaschinen
DE2909765A1 (de) * 1979-03-13 1980-09-18 Maschf Augsburg Nuernberg Ag Feuchtwerk
JPS59212268A (ja) * 1983-05-11 1984-12-01 ボ−ルドウイン・テクノロジイ・コ−ポレイシヨン 平版印刷機における給湿装置及び方法
DE3623590A1 (de) * 1986-07-12 1988-02-04 Miller Johannisberg Druckmasch Filmfeuchtwerk fuer offsetdruckmaschinen

Also Published As

Publication number Publication date
EP0389740A2 (de) 1990-10-03
EP0389740A3 (de) 1991-05-02
ATE91965T1 (de) 1993-08-15
ES2044240T3 (es) 1994-01-01
DE59002059D1 (de) 1993-09-02
DE3909985C1 (enrdf_load_stackoverflow) 1990-04-26

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