EP0761432A1 - Dispositif de mouillage pour une machine à imprimer en offset - Google Patents

Dispositif de mouillage pour une machine à imprimer en offset Download PDF

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Publication number
EP0761432A1
EP0761432A1 EP96110864A EP96110864A EP0761432A1 EP 0761432 A1 EP0761432 A1 EP 0761432A1 EP 96110864 A EP96110864 A EP 96110864A EP 96110864 A EP96110864 A EP 96110864A EP 0761432 A1 EP0761432 A1 EP 0761432A1
Authority
EP
European Patent Office
Prior art keywords
dampening
roller
unit according
contact
unit
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
EP96110864A
Other languages
German (de)
English (en)
Other versions
EP0761432B2 (fr
EP0761432B1 (fr
Inventor
Peter Hummel
Robert Ortner
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7769036&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0761432(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0761432A1 publication Critical patent/EP0761432A1/fr
Application granted granted Critical
Publication of EP0761432B1 publication Critical patent/EP0761432B1/fr
Publication of EP0761432B2 publication Critical patent/EP0761432B2/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 printing press, which is in operative connection with an inking unit and a plate cylinder carrying a printing form.
  • a dampening unit of this type is known from DE 3 416 845 A1.
  • a dampening unit essentially consists of a feed device for the dampening solution, a device for metering the dampening solution film and an application roller, which transfers the dampening solution film to a plate cylinder and can be coupled to the adjacent inking unit or operated separately.
  • the dampening roller can have a different peripheral speed to the plate cylinder, so that a wiping effect, for example removing foreign particles, is produced.
  • a further dampening system is known from DE 3 432 807 A1 in conjunction with US Pat. No. 4,724,764.
  • an ink-absorbing roller is assigned to the dampening roller as a so-called rider roller.
  • the ink-receiving roller rotates at a different peripheral speed to the platter cylinder and can be coupled to an adjacent inking unit or operated separately from it.
  • the object of the invention is to improve the print quality noticeably by a uniform, trouble-free fountain solution supply to the plate cylinder. This is solved according to the invention by the training features of claim 1. Further developments result from the subclaims.
  • a rider roller In a dampening unit with at least one dampening roller, after the contact point of dampening roller and plate cylinder of the dampening roller, at least one roller that absorbs dampening solution is assigned as a rider roller.
  • this rider roller can also have an additional dampening agent-absorbing second roller (tandem roller) adjacent, which is also in contact with the dampening roller.
  • a structure of water and ink caused by the subject, forms on the dampening roller.
  • the dampening solution-absorbing (first and second) rollers predominantly separate the dampening solution from the printing ink and feed the dampening solution back to the dampening application roller in a preferably reduced amount at a different point.
  • the ink / dampening solution mixture is leveled out on the dampening roller as a structure, so that the dampening roller again receives dampening solution supplied by the dampening solution supply device and transports it to the plate cylinder. If this structure is not completely destroyed, this leads to unstable dampening. Due to a dampening agent-friendly surface of the rider roller or of rider roller and downstream tandem roller, there is thus a better exchange of residual water between the dampening roller, the rider roller and possibly the tandem roller and again the dampening roller. This creates a uniform surface structure on the dampening roller after contact with the rider roller or tandem roller, if applicable.
  • the dampening solution-absorbing rollers reduce the tendency to stenciling (shadow-like markings) in the case of surface printing and the cord strips which produce an uneven pressure. It has been found that the dampening solution supply from the dampening device can be reduced in the dampening system according to the invention and the use of alcohol can also be reduced.
  • the dampening unit can be coupled to the inking unit in the printing process or operated separately.
  • a platter cylinder 1 is operatively connected to a dampening unit 4.
  • the inking unit 3 consists of several inking rollers 11, which are connected to ink-feeding rollers (not designated further).
  • the dampening unit 4 - viewed in the direction of rotation of the plate cylinder 1 - is arranged upstream of the inking unit 3 and, in the present example, consists of a dampening solution tank 8, a dampening device 6, a dampening metering device 7 and a dampening application roller 5 7 forms the already very thin dampening solution film at the nip to the dampening roller 5.
  • the dampening roller 5 is assigned a first roller 9 in contact with the dampening agent.
  • the roller 9 is arranged after the contact point of the dampening roller 5 / plate cylinder 1 of the dampening roller 5 in the direction of rotation. In the present example, it is also arranged as a bridge roller, in that the roller 9 can be brought into contact with the first inking roller 11 of the inking unit 3 in the direction of rotation of the plate cylinder 1. This switching position of the roller 9, shown by a dashed line, is used to couple the dampening unit 4 to the inking unit 3 for washing the rollers.
  • the dampening roller 5 is further arranged in the direction of rotation after the roller 9 a further (second) dampening roller 10, referred to as a tandem roller.
  • the rollers 9 and 10 are coupled to an axially acting traversing drive. Roller 9 and roller 10 have a surface coating made of matt chrome.
  • the dampening unit 4 is decoupled from the inking unit 3 at a separation point 13 (shown in FIG. 2) in that the roller 9 that guides the dampening solution is separated from the first inking roller 11.
  • the dampening roller 5 is operated at a circumferential speed that is the same or different from the circumferential speed of the plate cylinder 1 via a switchable positive drive.
  • the rotary movement is transmitted non-positively (by means of friction) from the platter cylinder 1 to the inking rollers 11.
  • the rollers 9 and 10 that guide the dampening solution can also have a surface made of stainless steel or a ceramic material that absorbs the dampening solution consist.
  • the roller surface can also have a silicon metal or at least silicon can be contained in the coating.
  • the second roller 10 that carries the dampening solution is not necessarily assigned to the dampening roller 5. Rather, the dampening unit 4 can also be trained in accordance with. Fig. 2 are operated. Thereafter, only one dampening roller 9 is assigned to the dampening roller 5. This version is preferably used when the dampening roller 5 carries little dampening solution. The roller 9 then works completely sufficiently the dampening solution film in the existing on the dampening roller 5 ink.
  • the dampening roller 9 for the dampening roller can also be operated at different or the same peripheral speed.
  • the roller 10 arranged downstream of the roller 9 can also be operated at different or the same peripheral speed to the dampening roller 5.
  • the cylinder jacket length of the rollers 9 and 10 is preferably identical to the length of the circular arc of the channel of the plate cylinder 1.
  • a structure of dampening solution and ink forms after the contact point of the dampening roller 5 / plate cylinder 1 on the dampening roller 5.
  • This structure is leveled out by the dampening agent-friendly roller 9, including when a further dampening agent-friendly roller 10 is used.
  • the surface structure of the ink / fountain solution mixture is evenly distributed on the dampening roller 5.
  • the rollers 9 and 10 have a blocking function with respect to the ink on their dampening roller 5, which noticeably prevents the ink from being returned to the dampening unit 4 and at the same time ensures a stable dampening solution metering in the form of a very thin dampening film.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP96110864A 1995-08-09 1996-07-05 Dispositif de mouillage pour une machine à imprimer en offset Expired - Lifetime EP0761432B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19529205 1995-08-09
DE19529205A DE19529205C2 (de) 1995-08-09 1995-08-09 Feuchtwerk für eine Offsetdruckmaschine

Publications (3)

Publication Number Publication Date
EP0761432A1 true EP0761432A1 (fr) 1997-03-12
EP0761432B1 EP0761432B1 (fr) 1999-12-08
EP0761432B2 EP0761432B2 (fr) 2003-07-23

Family

ID=7769036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96110864A Expired - Lifetime EP0761432B2 (fr) 1995-08-09 1996-07-05 Dispositif de mouillage pour une machine à imprimer en offset

Country Status (5)

Country Link
US (1) US5765479A (fr)
EP (1) EP0761432B2 (fr)
JP (1) JPH09118005A (fr)
AT (1) ATE187391T1 (fr)
DE (2) DE19529205C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29706932U1 (de) * 1997-04-17 1997-06-05 Roland Man Druckmasch Feuchtwerk für eine Offsetdruckmaschine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19822442A1 (de) 1997-08-04 1999-02-11 Heidelberger Druckmasch Ag Offsetdruckmaschine
DE19911568A1 (de) * 1999-03-16 2000-09-21 Heidelberger Druckmasch Ag Verfahren zum Einfeuchten einer Flachdruckform und Feuchtwerk einer Flachdruckmaschine
DE10020227B4 (de) * 2000-04-26 2004-07-15 Man Roland Druckmaschinen Ag Offsetdruckwerk für eine Druckmaschine
JP4672428B2 (ja) * 2005-04-28 2011-04-20 リョービ株式会社 渡しローラの着脱装置
KR200455366Y1 (ko) * 2008-09-26 2011-09-02 표수용 인쇄장치
DE102011008488A1 (de) 2011-01-13 2011-07-28 Heidelberger Druckmaschinen AG, 69115 Feuchtwerk einer Druckmaschine

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2620381A1 (de) * 1976-05-08 1977-11-17 Weitmann & Konrad Walze zum uebertragen waessriger feuchtmittel
GB2035903A (en) * 1978-11-15 1980-06-25 Polygraph Leipzig Moistening apparatus
DE3016366A1 (de) * 1979-06-06 1980-12-18 Polygraph Leipzig Feuchtwerk fuer rotations-offsetdruckmaschinen
DE3213562A1 (de) * 1981-12-15 1983-06-23 Luigi 24035 Curno Bergamo Ghisalberti Verfahren und befeuchtungsvorrichtung fuer offset-druck
DE3832527A1 (de) * 1987-09-29 1989-04-13 Jpe Kk Befeuchtungssystem fuer eine offsetdruckmaschine
US4932319A (en) * 1988-10-26 1990-06-12 Ryco Graphic Manufacturing, Inc. Spray dampening system for offset press
DE3923636A1 (de) * 1989-07-17 1991-04-25 Kotterer Grafotec Druckvorrichtung
EP0450155A1 (fr) * 1990-04-05 1991-10-09 MAN Roland Druckmaschinen AG Procédé d'humidification et d'encrage d'un cliché positionné sur un cylindre porte-plaque
DE4321183A1 (de) * 1992-07-09 1994-01-13 Heidelberger Druckmasch Ag Feuchtwerkswalze einer Druckmaschine

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE139816C (fr) *
US1755278A (en) * 1928-07-18 1930-04-22 Hoe & Co R Roller arrangement for printing presses
US2301334A (en) * 1940-09-09 1942-11-10 Armand C Schulz Printing press
US3613575A (en) * 1968-05-27 1971-10-19 Kantor Press Kontrols Inc Oscillator roller for printing presses
US3637416A (en) * 1970-02-04 1972-01-25 Mbt Corp Method of treating synthetic plastic and elastomeric materials and articles produced thereby
US3673959A (en) * 1970-04-22 1972-07-04 North American Rockwell Dampening system for lithographic printing press
US3916789A (en) * 1972-09-12 1975-11-04 Vickers Ltd Printing
US3835597A (en) * 1972-11-24 1974-09-17 Harris Intertype Corp Method of manufacturing a hydrophilic dampening roll
US3842735A (en) * 1972-12-22 1974-10-22 Harris Intertype Corp Lithographic printing apparatus and wash-up device
US3926116A (en) * 1974-07-01 1975-12-16 Webcrafters Inc Dampening apparatus for offset printing press
FR2397939A1 (fr) * 1977-07-22 1979-02-16 Chambon Machines Dispositif d'encrage pour impression a l'encre grasse
US4287827A (en) * 1979-05-17 1981-09-08 Warner Gordon R Combined inking and moistening roller
IT1160413B (it) * 1978-12-28 1987-03-11 Cigardi Omc Sa Dispositivo di bagnotura perfezionato, ad acqua ed a miscela acqua-alcool, applicabile su macchine da stampa offset
DE2906089C2 (de) * 1979-02-17 1984-02-02 Gerhard 8960 Kempten Werner Feucht einer Rotations-Offsetdruckmaschine mit einer Reibwalze für Feuchtwerke im Offsetdruck
GB2082121B (en) * 1980-08-14 1984-11-28 Komori Printing Mach Water supply apparatus for printing press
US4724764B1 (en) * 1983-05-11 1994-09-20 Baldwin Technology Corp Dampening system
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
GB2151186B (en) * 1983-12-12 1987-09-09 Baldwin Technology Corp Dampening system
DD238574A1 (de) * 1985-06-25 1986-08-27 Polygraph Leipzig Verfahren und einrichtung zur beseitigung von putzen auf der druckplatte
DE3623590A1 (de) * 1986-07-12 1988-02-04 Miller Johannisberg Druckmasch Filmfeuchtwerk fuer offsetdruckmaschinen
DE3644982A1 (de) * 1986-07-12 1988-11-03 Miller Johannisberg Druckmasch Feuchtwerk fuer offsetdruckmaschinen
DE3908044C1 (fr) * 1989-03-13 1990-05-17 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
US5158017A (en) * 1990-09-11 1992-10-27 Sun Graphic Technologies, Inc. Press dampening system
US5562031A (en) * 1993-02-16 1996-10-08 Sun Graphic Technologies, Inc. Method and apparatus for driving a bridge roller on a printing press
DE4404989C2 (de) * 1994-02-17 1995-11-30 Roland Man Druckmasch Offsetdruckvorrichtung

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2620381A1 (de) * 1976-05-08 1977-11-17 Weitmann & Konrad Walze zum uebertragen waessriger feuchtmittel
GB2035903A (en) * 1978-11-15 1980-06-25 Polygraph Leipzig Moistening apparatus
DE3016366A1 (de) * 1979-06-06 1980-12-18 Polygraph Leipzig Feuchtwerk fuer rotations-offsetdruckmaschinen
DE3213562A1 (de) * 1981-12-15 1983-06-23 Luigi 24035 Curno Bergamo Ghisalberti Verfahren und befeuchtungsvorrichtung fuer offset-druck
DE3832527A1 (de) * 1987-09-29 1989-04-13 Jpe Kk Befeuchtungssystem fuer eine offsetdruckmaschine
US4932319A (en) * 1988-10-26 1990-06-12 Ryco Graphic Manufacturing, Inc. Spray dampening system for offset press
DE3923636A1 (de) * 1989-07-17 1991-04-25 Kotterer Grafotec Druckvorrichtung
EP0450155A1 (fr) * 1990-04-05 1991-10-09 MAN Roland Druckmaschinen AG Procédé d'humidification et d'encrage d'un cliché positionné sur un cylindre porte-plaque
DE4321183A1 (de) * 1992-07-09 1994-01-13 Heidelberger Druckmasch Ag Feuchtwerkswalze einer Druckmaschine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29706932U1 (de) * 1997-04-17 1997-06-05 Roland Man Druckmasch Feuchtwerk für eine Offsetdruckmaschine
FR2762254A1 (fr) * 1997-04-17 1998-10-23 Roland Man Druckmasch Unite de mouillage pour une machine d'impression offset
US5992317A (en) * 1997-04-17 1999-11-30 Man Roland Druckmaschinen Ag Dampening unit for an offset printing machine

Also Published As

Publication number Publication date
DE19529205C2 (de) 1997-08-14
EP0761432B2 (fr) 2003-07-23
US5765479A (en) 1998-06-16
EP0761432B1 (fr) 1999-12-08
JPH09118005A (ja) 1997-05-06
DE59603842D1 (de) 2000-01-13
DE19529205A1 (de) 1997-02-13
ATE187391T1 (de) 1999-12-15

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