EP0761432B1 - 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
EP0761432B1
EP0761432B1 EP96110864A EP96110864A EP0761432B1 EP 0761432 B1 EP0761432 B1 EP 0761432B1 EP 96110864 A EP96110864 A EP 96110864A EP 96110864 A EP96110864 A EP 96110864A EP 0761432 B1 EP0761432 B1 EP 0761432B1
Authority
EP
European Patent Office
Prior art keywords
roller
damping
dampening
unit
agent
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
EP96110864A
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German (de)
English (en)
Other versions
EP0761432B2 (fr
EP0761432A1 (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
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Filing date
Publication date
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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
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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 has an inking unit and a plate cylinder carrying a printing form is operatively connected.
  • a dampening unit of this type is known from DE 3 416 845 A1. After that there is a Dampening unit essentially from a supply device for the dampening solution, a device for dosing the dampening solution film as well as an applicator roller covering the dampening solution film transferred to a platter cylinder and coupled to the neighboring inking unit or can be operated separately.
  • the dampening roller can Plate cylinders have a different peripheral speed, so that for example A wiping effect that removes foreign particles is created.
  • GB-A-20 35 903 is a dampening unit for rotary printing presses with one Ductor roller, a dampening roller and an intermediate and applicator roller known.
  • the intermediate and applicator roller is one after the point of contact with the plate cylinder Subordinate inking roller as a contact point, the one receiving a dampening solution Buffer roller is also subordinated as a further contact point.
  • the buffer roller should temporarily store a dampening solution excess and gradually to the intermediate and Return the application roller. The dampening solution excess results from the front Dampening unit fed to the intermediate and applicator roller, but from the plate cylinder channel not included, supply of dampening solution.
  • EP-A-0 450 155 is a control circuit for a printing unit of an offset sheet-fed printing machine known with a dampening system.
  • the dampening roller of the The dampening unit is switched off by the plate cylinder without contact, pre-moistened and then pre-moistened on the plate cylinder and moistened.
  • the inking rollers are then placed on the plate cylinder.
  • This control circuit is intended to noticeably reduce the amount of waste paper at the start of printing.
  • the object of the invention is to improve the print quality by a uniform, trouble-free Improve dampening solution supply to the plate cylinder noticeably. This is solved according to the invention through the training features of claims 1 to 4. Further training result from the subclaims.
  • the object of the invention is to improve the print quality by a uniform, trouble-free Improve dampening solution supply to the plate cylinder noticeably. This is solved according to the invention through the training features of claim 1. Further training result itself from the subclaims.
  • dampening solution absorbing roller is assigned as a rider roller. In a preferred further training this rider roller can also hold an additional dampening solution Have roller (tandem roller) adjacent, which is also in contact with the dampening roller is.
  • the dampening solution absorbing rollers (first and second) mainly separate the dampening solution from the printing ink and guide the dampening solution at a different point in preferred reduced amount again to the dampening roller.
  • the color / dampening solution mixture becomes equalized on the dampening roller as a structure, so that the dampening roller of the dampening solution feeder receives again and to the Plate cylinder transported. If this structure is not completely destroyed, this leads to an unstable dampening. Thanks to the dampening agent-friendly surface of the rider roller or between the rider and subordinate tandem roller thus finds a better exchange of residual water between the dampening roller, the rider roller and, if necessary the tandem roller and again the dampening roller. This creates a uniform surface structure on the dampening roller after contact with the rider roll or tandem roll, if applicable.
  • the dampening roller reduce the tendency to stenciling (shadow-like markings) for surface printing as well as the uneven pressure on the cord strips.
  • dampening solution supply from the dampening duct can be reduced and the use of alcohol can also be reduced can.
  • the dampening system can be coupled with the inking unit in the printing process as well 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 with ink feed rollers (no further designated) are connected.
  • the dampening unit 4 is - in the direction of rotation of the plate cylinder 1 considered - upstream of the inking unit 3 and in the present example consists of a Fountain solution container 8, a dampening device 6, a dampening device 7 and one Dampening roller 5.
  • Dampening agent tank 8 and dampening roller 6 form the dampening agent supply device 12 and the moist metering device 7 forms at the gap Dampening roller 5 from the already very thin dampening solution film.
  • the dampening roller According to FIG. 1, 5 is associated with a first roller 9 in contact with dampening solution.
  • the roller 9 is after the contact point of the dampening roller 5 / plate cylinder 1 downstream of the dampening roller 5 in the direction of rotation. It is in the present Example arranged simultaneously as a bridge roller by the roller 9 with the in the direction of rotation of the platter cylinder 1 first inking roller 11 of the inking unit 3 can be brought into contact is.
  • This switching position of the roller 9, represented by a dashed line, is used for coupling of the dampening unit 4 used with the inking unit 3 for washing the rollers.
  • the dampening roller 5 is another in the direction of rotation after the roller 9 (Second) fountain solution-absorbing 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 matt chrome surface coating.
  • 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 consist of a surface made of stainless steel or a ceramic material that absorbs the dampening solution.
  • 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 can also lead to the dampening roller are operated with different or the same peripheral speed.
  • the roller 10 arranged downstream of the roller 9 can also be different or the same peripheral speed to the dampening roller 5 are operated.
  • the Cylinder surface 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.
  • the dampening roller 5 / Plate cylinder 1 on the dampening roller 5 a structure of dampening solution and ink.
  • the dampening agent-friendly roller 9 including when using another dampening agent-friendly roller 10, this structure is equalized.
  • the surface structure of the ink / fountain solution mixture is evenly distributed on the dampening roller 5.
  • the rollers 9 and 10 have a locking function compared to the paint on the dampening roller 5, which noticeably the return transport of Ink in the dampening unit 4 prevented and at the same time a stable dampening solution metering guaranteed in the form of a very thin wet film.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (7)

  1. Unité de mouillage pour une machine d'impression offset, comportant un cylindre porte-plaque portant un cliché, qui est en liaison active avec des rouleaux d'application réglables d'une unité d'encrage et d'une unité de mouillage, qui présente un dispositif d'amenée d'agent de mouillage ainsi qu'un dispositif de dosage d'agent de mouillage, au moins un rouleau d'application d'agent de mouillage (5) voisin du cylindre porteplaque (1) formant, avec celui-ci, un point de contact pour l'application de l'agent de mouillage, un dispositif d'amenée d'agent de mouillage (12) voisin du rouleau d'application d'agent de mouillage (5) étant agencé, comme premier point de contact, avant ce point de contact pour l'application de l'agent de mouillage, dans le sens de rotation du rouleau d'application d'agent de mouillage (5),
    caractérisée en ce qu'au moins un premier rouleau (9) recevant l'agent de mouillage, dont la surface est réalisée en une matière recevant l'agent de mouillage, est disposé en aval du rouleau d'application d'agent de mouillage (5), dans son sens de rotation, après le point de contact pour l'application de l'agent de mouillage directement comme second point de contact, en ce que le rouleau d'application d'agent de mouillage (5) tourne à une vitesse périphérique identique ou différente par rapport au cylindre porte-plaque (1), et en ce que le premier rouleau (9) recevant l'agent de mouillage tourne à une vitesse périphérique identique ou différente par rapport au rouleau d'application d'agent de mouillage (5) et est coupé à un entraínement alternatif de distribution axiale.
  2. Unité de mouillage selon la revendication 1,
    caractérisée en ce que, en contact avec le rouleau d'application d'agent de mouillage (5), il est agencé un autre rouleau (10) recevant de l'agent de mouillage en aval du rouleau (9) dans le sens de rotation du rouleau d'application d'agent de mouillage (5).
  3. Unité de mouillage selon la revendication 1,
    caractérisée en ce que le rouleau (10) tourne à une vitesse périphérique identique ou différente par rapport au rouleau d'application d'agent de mouillage (5).
  4. Unité de mouillage selon les revendications 1 et 2,
    caractérisée en ce que les rouleaux (9 et 10) sont couplés à un entraínement alternatif de distribution axiale.
  5. Unité de mouillage selon la revendication 1,
    caractérisée en ce que le rouleau (9) recevant l'agent de mouillage peut être commuté comme rouleau de pontage par rapport à l'unité d'encrage voisine (3).
  6. Unité de mouillage selon la revendication 1,
    caractérisée en ce que le rouleau (9) recevant l'agent de mouillage est découpé de l'unité d'encrage voisine (3), pendant l'impression, au niveau du point de rupture (13).
  7. Unité de mouillage selon les revendications 1 et 2,
    caractérisée en ce que les rouleaux (9 et 10) guidant l'agent de mouillage présentent une surface en chrome ou en acier spécial ou en une céramique recevant l'agent de mouillage, ou contiennent au moins du silicium dans la surface.
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 EP0761432A1 (fr) 1997-03-12
EP0761432B1 true 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)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29706932U1 (de) * 1997-04-17 1997-06-05 MAN Roland Druckmaschinen AG, 63075 Offenbach Feuchtwerk für eine Offsetdruckmaschine
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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3644982A1 (de) * 1986-07-12 1988-11-03 Miller Johannisberg Druckmasch Feuchtwerk fuer offsetdruckmaschinen
US5158017A (en) * 1990-09-11 1992-10-27 Sun Graphic Technologies, Inc. Press dampening system
EP0668159A1 (fr) * 1994-02-17 1995-08-23 MAN Roland Druckmaschinen AG Dispositif d'impression offset

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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
DE2620381A1 (de) * 1976-05-08 1977-11-17 Weitmann & Konrad Walze zum uebertragen waessriger feuchtmittel
FR2397939A1 (fr) * 1977-07-22 1979-02-16 Chambon Machines Dispositif d'encrage pour impression a l'encre grasse
DD139816A1 (de) * 1978-11-15 1980-01-23 Hans Johne Feuchtwerk
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
DD144155B1 (de) * 1979-06-06 1988-04-27 Hans Johne Feuchtwerk fuer rotations-offsetdruckmaschinen
GB2082121B (en) * 1980-08-14 1984-11-28 Komori Printing Mach Water supply apparatus for printing press
IT1205429B (it) * 1981-12-15 1989-03-23 Luigi Ghisalberti Metodo e dispositivo di bagnatura nella stampa offset
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
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
DE3908044C1 (fr) * 1989-03-13 1990-05-17 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE3923636C2 (de) * 1989-07-17 1996-05-23 Kotterer Grafotec Druckvorrichtung
DE4011039C2 (de) * 1990-04-05 1996-03-14 Roland Man Druckmasch Verfahren zum Befeuchten und Einfärben eines Plattenzylinders einer Mehrfarben-Offset-Bogenrotationsdruckmaschine
DE4321183C2 (de) * 1992-07-09 2002-12-12 Heidelberger Druckmasch Ag Feuchtwerkswalze einer Druckmaschine
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Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3644982A1 (de) * 1986-07-12 1988-11-03 Miller Johannisberg Druckmasch Feuchtwerk fuer offsetdruckmaschinen
US5158017A (en) * 1990-09-11 1992-10-27 Sun Graphic Technologies, Inc. Press dampening system
EP0668159A1 (fr) * 1994-02-17 1995-08-23 MAN Roland Druckmaschinen AG Dispositif d'impression offset

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Offset-Drucktechnik, Fachschriftenverlag, 6. Auflage 1989, ISBN 3-921 217-14-8, Seite 438 *
Polygraph, Polygraph Verlag GmbH, Ausgabe 19-94, ISSN 0032-3845 *

Also Published As

Publication number Publication date
DE19529205A1 (de) 1997-02-13
DE59603842D1 (de) 2000-01-13
EP0761432B2 (fr) 2003-07-23
DE19529205C2 (de) 1997-08-14
EP0761432A1 (fr) 1997-03-12
US5765479A (en) 1998-06-16
ATE187391T1 (de) 1999-12-15
JPH09118005A (ja) 1997-05-06

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