EP0719639A2 - Dispositif de mouillage pour une machine à imprimer - Google Patents

Dispositif de mouillage pour une machine à imprimer Download PDF

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Publication number
EP0719639A2
EP0719639A2 EP95120136A EP95120136A EP0719639A2 EP 0719639 A2 EP0719639 A2 EP 0719639A2 EP 95120136 A EP95120136 A EP 95120136A EP 95120136 A EP95120136 A EP 95120136A EP 0719639 A2 EP0719639 A2 EP 0719639A2
Authority
EP
European Patent Office
Prior art keywords
roller
dampening
plate cylinder
roll
diameter
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
EP95120136A
Other languages
German (de)
English (en)
Other versions
EP0719639A3 (fr
EP0719639B1 (fr
Inventor
Robert Müller
Helmut Puschnerat
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer Albert 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 Koenig and Bauer Albert AG filed Critical Koenig and Bauer Albert AG
Publication of EP0719639A2 publication Critical patent/EP0719639A2/fr
Publication of EP0719639A3 publication Critical patent/EP0719639A3/fr
Application granted granted Critical
Publication of EP0719639B1 publication Critical patent/EP0719639B1/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
    • 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 for an offset rotary printing press.
  • EP 04 62 490 A1 shows a generic dampening unit for a rotary printing press consisting of an immersion roller, a metering roller, a dampening roller and a dampening roller.
  • the dampening roller is optionally drivable such that slippage occurs either between the dampening roller and the dampening roller or between the dampening roller and the metering roller.
  • a dampening unit has become known from DE 27 45 330 A1, which consists of an immersion roller immersed in a dampening solution box, a transfer roller and a dampening roller and a dampening application roller.
  • the plunger roller has a chrome-plated surface and can be driven with a variable peripheral speed.
  • the transfer roller is coated with rubber, freely rotatable and can be adjusted to the dampening roller.
  • the dampening roller is chrome-plated and is driven by the plate cylinder via gear wheels.
  • the dampening roller has a soft coating and is dragged along by the dampening roller.
  • a disadvantage of this dampening system is that the ink is transferred from the inked printing plate to the The dampening roller is transferred to the remaining rollers of the dampening unit in the direction of the dampening solution box and thus settles on the rollers mentioned, so that in turn only an uneven transport of dampening solution can take place in the direction of the plate cylinder. As a result, there are quality defects in printing.
  • the invention has for its object to provide a dampening system with at least four rollers for applying dampening solution to a plate cylinder of an offset rotary printing press, in which carryover of printing ink onto the dampening roller and into the remaining dampening unit is largely avoided.
  • the advantages which can be achieved with the invention consist in particular in that, due to a difference in the peripheral speed between the dampening solution applicator roller and the dampening roller, there is an interruption of the carryover of ink in the direction of the dampening solution application even at a point close to the plate cylinder. Furthermore, an additional homogenization of the dampening solution is achieved by the above-mentioned circumferential speed difference between dampening solution application roller and dampening friction roller, so that the printing plates of the plate cylinder are moistened more uniformly. Due to the almost identical circumferential speed of the dampening roller and plate cylinder, the dampening solution is applied in a manner that is gentle on the printing plate.
  • An inventive four-roller dampening unit 1 consists of a with a water-friendly material, for. B. chrome or ceramic (z. B. aluminum oxide or chromium oxide) coated immersion roller 2, a rubber-coated transfer roller 3, an axially reciprocable dampening roller 4 with a water-friendly coating, for. B. chrome or ceramic, and from a rubber-coated dampening roller 5, which can be frictionally adjusted to a plate cylinder 6, so that it rotates at approximately the same or slightly smaller than the plate cylinder 6 peripheral speed, approximately with 99 to 99.5 percent .
  • the rollers 3; 5 can also be coated with rubber-like plastic, as z. B is already known from inking rollers.
  • the dipping roller 2 is partially immersed in a dampening solution box 7 with dampening solution 8 a.
  • the plunger roller 2 is driven by an electric motor 12 with an optionally variable speed.
  • the dipping roller 2 is in contact with the transfer roller 3.
  • the transfer roller 3 can e.g. B. be driven via a transfer roller pin fixed gear and a gear not shown with a gear ratio of about 1 to 3 with one of the plunger roller 2 against higher peripheral speed. It is also possible to equip the transfer roller 3 with a separate, not shown, speed-controlled electric motor drive, which maintains the ratio of the peripheral speeds of the transfer roller 3 and the dip roller 2 in a ratio of 1: 3.
  • the dampening roller 4 is driven at a peripheral speed which is lower than the peripheral speed of the plate cylinder 6, but which is proportional to the peripheral speed of the plate cylinder 6.
  • a drive consists of a single drive, e.g. B. a speed-adjustable geared motor 14 (Fig. 1).
  • the drive for the dampening roller 4 consists of a gear train of z. B. three gears 17, 18; 19.
  • the gear 21 is rotatably connected to a drive pin of the dampening roller 4 and the gear 22 is rotatably connected to a drive pin of the plate cylinder 6 (FIG. 2).
  • the gear 17 is in engagement with a drive gear 21 of the dampening roller 4, the gear 19 is in engagement with a drive gear 22 of the plate cylinder 6.
  • the machine drive acts on the gear 22 of the plate cylinder 6.
  • the dampening roller 5 is placed on the plate cylinder 6 in such a way that it is driven by the plate cylinder 6 in a frictional manner, whereby, as already mentioned in the first embodiment, low frictional losses occur in the peripheral speed of the dampening roller 5 with respect to the plate cylinder 6.
  • a pressure strip in a contact area 23 between the dampening roller 5 and the plate cylinder 6 with a width of five to eleven millimeters can be set on the elastic surface of the dampening roller 5.
  • dampening roller 5 assumes, at least approximately, the peripheral speed of the plate cylinder 6 (with printing plates occupied), while in a contact area 24 between the dampening roller 4 and the dampening roller 5 a differential speed arises because the dampening roller 4 has a lower peripheral speed, e.g. B. 96 percent, compared to the dampening roller 5, the force of the dampening roller 4 and the dampening roller 5 is selected so that it does not follow the speed of the dampening roller 4, but the speed of the plate cylinder 6.
  • the diameter d6 of the plate cylinder 6, the diameter d5 of the dampening roller 5, the diameter d4 of the dampening roller 4, the diameter d3 of the transfer roller 3 and the diameter d2 of the dipping roller 2 behave as 1 to (0.51 to 0.88) to ( 0.45 to 0.7) to (0.34 to 0.75) to (0.3 to 0.6).
  • the diameters d6 to d5 to d4 to d3 to d2 relate to one another as 1 to 0.77 to 0.64 to 0.66 to 0.6.
  • the circumferential speeds from plate cylinder 6 to dampening roller 5 to dampening roller 4 to transfer roller 3 to immersion roller 2 behave as 1 to 1 to (0.4 to 0.99) to (0.25 to 0.4) to (0.08 to 0 , 18).
  • the Circumferential speeds from plate cylinder 6 to dampening roller 5 to dampening roller 4 to transfer roller 3 to immersion roller 2 as 1 to 1 to 0.96 to 0.33 to 0.1.
  • the plate cylinder 6 With each change in the speed of the machine, ie the plate cylinder 6, there is a proportional change in the peripheral speed of the rollers 2 to 5.
  • the cylinders, rollers, gears described above are stored in two side frames, not shown.
  • the rollers are adjustable against each other by known means, such as. B. eccentric bushings.
  • roller train consisting of immersion roller 2, transfer roller 3, dampening roller 4 and dampening roller 5
  • at least one further water-friendly roller not shown, arranged between the dampening roller 4 and the dampening roller 5.
  • This roller can be driven by the dampening roller 5 with a friction fit, so that a contact area 24 with a corresponding speed difference of preferably three to four percent between the dampening roller 4 and the mentioned, not shown roller arises.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP95120136A 1994-12-30 1995-12-20 Dispositif de mouillage pour une machine à imprimer Expired - Lifetime EP0719639B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4447178 1994-12-30
DE4447178A DE4447178A1 (de) 1994-12-30 1994-12-30 Feuchtwerk für eine Druckmaschine

Publications (3)

Publication Number Publication Date
EP0719639A2 true EP0719639A2 (fr) 1996-07-03
EP0719639A3 EP0719639A3 (fr) 1997-03-19
EP0719639B1 EP0719639B1 (fr) 2000-03-15

Family

ID=6537467

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95120136A Expired - Lifetime EP0719639B1 (fr) 1994-12-30 1995-12-20 Dispositif de mouillage pour une machine à imprimer

Country Status (4)

Country Link
US (1) US5649481A (fr)
EP (1) EP0719639B1 (fr)
JP (1) JP3167606B2 (fr)
DE (2) DE4447178A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10035786A1 (de) * 2000-07-22 2002-02-07 Koenig & Bauer Ag Feuchtwerk

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19714222C1 (de) * 1997-04-07 1998-04-16 Koenig & Bauer Albert Ag Feuchtmittelwalze
IES970423A2 (en) * 1997-06-05 1998-10-21 Richard Harrington Improvements relating to printing
US5909707A (en) * 1997-07-24 1999-06-08 Heidelberger Druckmaschinen Ag High-speed printing system having multiple slipping nips
JP2001353839A (ja) * 2000-04-14 2001-12-25 Komori Corp 印刷機械におけるローラの構造
DE102004056277A1 (de) * 2004-02-09 2005-09-08 Koenig & Bauer Ag Verfahren zum Verteilen eines von einer ersten Walze zur Oberfläche eines Formzylinders einer Druckmaschine zu transportierenden Feuchtmittels
DE102004006231B3 (de) * 2004-02-09 2005-08-04 Koenig & Bauer Ag Verfahren zum Transportieren von Feuchtmittel von einer ersten Walze an die Oberfläche eines Formzylinders einer Druckmaschine
DE102008003239B4 (de) * 2007-02-06 2015-12-03 Heidelberger Druckmaschinen Ag Verfahren zum Betreiben eines Feuchtwerks einer Druckmaschine
US8419179B2 (en) * 2011-06-30 2013-04-16 Xerox Corporation Methods for UV gel ink leveling and direct-to-substrate digital radiation curable gel ink printing, apparatus and systems having leveling member with a metal oxide surface
US8764179B2 (en) 2011-07-08 2014-07-01 Xerox Corporation Methods for radiation curable gel ink leveling and direct-to-substrate digital radiation curable gel ink printing, apparatus and systems having pressure member with hydrophobic surface

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106154A (en) * 1963-01-08 1963-10-08 Miller Printing Machinery Co Dampener for printing presses
GB2082121A (en) * 1980-08-14 1982-03-03 Komori Printing Mach Water supply apparatus for printing press
US5067401A (en) * 1988-11-10 1991-11-26 Toshiba Kikai Kabushiki Kaisha Moistening water supply apparatus for printing press
EP0462490A1 (fr) * 1990-06-21 1991-12-27 Heidelberger Druckmaschinen Aktiengesellschaft Système de mouillage à film pour presse rotative

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517613A (en) * 1967-03-28 1970-06-30 Baeuerle Gmbh Mathias Offset printing machine with interchangeable application and etching rollers
US3673959A (en) * 1970-04-22 1972-07-04 North American Rockwell Dampening system for lithographic printing press
DE2745330A1 (de) * 1977-10-06 1979-07-26 Cigardi Omc Sa Offset-druckmaschine mit wahlweise mit wasser bzw. einem gemisch von wasser und alkohol arbeitendem feuchtwerk
JPS57123061A (en) * 1981-01-22 1982-07-31 Komori Printing Mach Co Ltd Damping device for press
DE3336875A1 (de) * 1983-10-11 1985-04-18 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum befeuchten von druckplatten in rotationsdruckmaschinen
JPH05360U (ja) * 1991-06-20 1993-01-08 株式会社アツギユニシア 内径クランプ装置
DE4125012A1 (de) * 1991-07-27 1993-01-28 Koenig & Bauer Ag Einrichtung zum befeuchten von zylindern bei offsetrotationsdruckmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106154A (en) * 1963-01-08 1963-10-08 Miller Printing Machinery Co Dampener for printing presses
GB2082121A (en) * 1980-08-14 1982-03-03 Komori Printing Mach Water supply apparatus for printing press
US5067401A (en) * 1988-11-10 1991-11-26 Toshiba Kikai Kabushiki Kaisha Moistening water supply apparatus for printing press
EP0462490A1 (fr) * 1990-06-21 1991-12-27 Heidelberger Druckmaschinen Aktiengesellschaft Système de mouillage à film pour presse rotative

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10035786A1 (de) * 2000-07-22 2002-02-07 Koenig & Bauer Ag Feuchtwerk

Also Published As

Publication number Publication date
US5649481A (en) 1997-07-22
DE59508003D1 (de) 2000-04-20
JP3167606B2 (ja) 2001-05-21
DE4447178A1 (de) 1996-07-04
EP0719639A3 (fr) 1997-03-19
JPH08230142A (ja) 1996-09-10
EP0719639B1 (fr) 2000-03-15

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