EP0450155A1 - Procédé d'humidification et d'encrage d'un cliché positionné sur un cylindre porte-plaque - Google Patents

Procédé d'humidification et d'encrage d'un cliché positionné sur un cylindre porte-plaque Download PDF

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Publication number
EP0450155A1
EP0450155A1 EP90122372A EP90122372A EP0450155A1 EP 0450155 A1 EP0450155 A1 EP 0450155A1 EP 90122372 A EP90122372 A EP 90122372A EP 90122372 A EP90122372 A EP 90122372A EP 0450155 A1 EP0450155 A1 EP 0450155A1
Authority
EP
European Patent Office
Prior art keywords
roller
plate cylinder
dampening
inking
printing
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
EP90122372A
Other languages
German (de)
English (en)
Other versions
EP0450155B1 (fr
Inventor
Claus Simeth
Reinhold Hanske
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 Miller Druckmaschinen GmbH
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 Miller Druckmaschinen GmbH, MAN Roland Druckmaschinen AG filed Critical MAN Miller Druckmaschinen GmbH
Publication of EP0450155A1 publication Critical patent/EP0450155A1/fr
Application granted granted Critical
Publication of EP0450155B1 publication Critical patent/EP0450155B1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/10—Starting-up the machine
    • B41P2233/12—Pre-wetting

Definitions

  • the invention relates to a control circuit for at least one printing unit of an offset sheet-fed printing machine containing a dampening and inking unit, the printing unit having a film dampening unit with a dampening application roller which can be adjusted to a plate cylinder and at least one inking application roller which can also be adjusted to the plate cylinder is provided with an inking roller .
  • Printing units with these features are common.
  • a printing unit is provided for each color and the printing units are usually spaced apart from one another and connected to one another in the machine via transfer systems.
  • the specified rollers are conventionally prepared for printing as follows: First of all, all rollers are driven to rotate. All rollers are switched off from the plate cylinder so that it is neither pre-moistened nor pre-inked. Then the dampening roller is placed on the dipping roller and at the same time on the plate cylinder, so that the plate cylinder is pre-moistened at increased speed. At the same time, a bridge roller makes contact between the dampening roller and the first of a series of inking rollers, so that the inking rollers are now also pre-moistened. The pre-inked and pre-moistened inking rollers are then also placed on the plate cylinder and printing can begin.
  • the invention is therefore based on the object of proposing a control circuit for a printing unit with the features mentioned at the outset, which leads to a noticeably reduced amount of waste without the print quality suffering as a result.
  • the invention is characterized in that the dampening roller is pre-moistened without contact with the plate cylinder or with the inking roller or rollers, whereupon the pre-moistened dampening roller, which is still in contact with the immersion roller, the transfer roller or the distributor roller of the film dampening unit the plate cylinder is turned on, which is thereby pre-moistened without moisture being transferred to the inking roller (s), whereupon the inking roller (s) are placed on the plate cylinder, which is thereby pre-moistened and pre-inked, whereupon printing begins.
  • All switching points (instead of the plate cylinder) should lie in the passage of the channel of the plate cylinder, so that no streaking occurs on the printed image on contact, which would otherwise be caused by the speed difference that is inevitable when the plate is turned on.
  • the essence of the invention is therefore that the measures described ensure that the dampening roller is pre-moistened well and then transfers the moisture to the plate cylinder without the inking rollers being pre-moistened at the same time. Rather, these are only pre-inked and the pre-inked inking rollers are then brought into contact with the directly pre-moistened plate cylinder, whereupon printing can begin.
  • the measures according to claim 11 have the effect that no over-coloring can occur.
  • a bridge roller is usually provided, which establishes the connection between the dampening unit and the first of the row of inking rollers.
  • the bridge roller therefore lies against the dampening roller and can be placed against the first inking roller of the inking unit. It should be mentioned that such a bridge roller need not necessarily be provided in the control circuit according to the invention.
  • Such a bridge roller can also be placed on the first inking roller after the plate cylinder has been pre-moistened and pre-inked. However, it can also remain parked on the first inking roller.
  • the inking rollers should be separated from the plate cylinder and possibly also from the dampening unit, so that only the dampening unit remains in contact with the plate at low speed. If a bridge roller is present, it also separates from the inking unit, so that too much dampening solution cannot get into the ink.
  • control circuit according to the invention and the process sequence according to the invention only add color when a sheet takes off the color.
  • the plate is pre-moistened with the correct amount of moisture, which is sufficient for one turn of the plate cylinder. Only then are the pre-colored inking rollers, which have not previously come into contact with the dampness of the dampening system, placed on the plate cylinder and transfer their color to the plate cylinder or to the printing plate clamped on the plate cylinder.
  • a plurality of ink application rollers 1 are provided, each of which is adjoined by ink distributor rollers 2. These rollers are part of an inking unit (not shown) of the printing unit in question.
  • a bridge roller 3 is provided, which bears against a dampening roller 4 here.
  • a dipping roller 5 dips into a wet box 8 and a dosing roller 6 bears against the dipping roller 5.
  • a plate cylinder 7 is shown, on the circumference of which a printing plate - not shown in the drawing - is clamped.
  • the plate cylinder rotates in the direction of arrow 9.
  • Fig. 1 the dampening and inking unit is turned off. This is the machine standstill. If the machine is switched on, all rollers and cylinders are driven to rotate, which is not shown in the drawing. The immersion and metering rollers 5, 6 are already in rotation when the dampening unit is switched on.
  • rollers that were activated during the step in question are outlined in black and hatched.
  • the dampening roller 4 is pre-moistened at an increased speed.
  • she is employed on the dipping roller 5. Two turns of the dampening roller are sufficient for this, corresponding to one turn of the plate cylinder 7 by approximately 232 °.
  • the dampening roller 4 and the plate cylinder 7 or its printing plate are pre-moistened.
  • the printing plate of the plate cylinder 7 is pre-moistened and pre-inked.
  • the inking rollers 1 are set on the plate cylinder 7. This setting of the inking rollers 1 takes place, based on the plate cylinder 7, 605 ° before the "pressure on" signal.
  • the bridge roller 3 can also be placed on the first inking roller 1 and this situation is shown in FIG. 5.
  • the employed bridge roller 3 thus makes the contact from the dampening unit to the inking unit.
  • the switching point of the bridge roller lies after inking the plate cylinder and before printing begins.
  • the advantages of the method according to the invention lie in particular in the fact that the individual components of the printing unit are switched in such a way that the plate cylinder is optimally prepared for printing the first sheet, so that the first sheet already achieves an optimum in print quality and a Minimum waste is incurred. All components involved can also be switched individually. The switching sequence was determined empirically. The variability of the system ensures that user-specific process requirements can be met.
  • the process sequence for a multicolour printing machine is thus as follows.
  • the sheet transport is started.
  • the plate cylinder is pre-moistened over 360 ° and then the inking rollers 1 switch to the plate cylinder 7, so that it is pre-inked for 605 ° before the "pressure on" signal.
  • Pre-moistening is initiated after the blowing air / suction air of the feeder coupling is applied and after the corresponding revolutions.
  • An additional sheet detection such as a sensor, in the path of sheet transport in front of the first printing unit is provided, however, controls the sheet travel, so that in the event of an interruption in printing, only the first printing unit and at most the second printing unit can enter the pre-dampening phase described. All usual interventions by the operator do not prevent the printing units from being technically prepared properly when restarted.
  • the printing plate is optimally prepared with dampening solution and ink. If the pressure is interrupted, a certain amount of over-humidification or under-humidification is unavoidable and is then dosed precisely.
  • dampening systems are, as described above,
  • the third dampening unit is therefore activated shortly before the sheet reaches the second printing unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Methods (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
EP90122372A 1990-04-05 1990-11-23 Procédé d'humidification et d'encrage d'un cliché positionné sur un cylindre porte-plaque Expired - Lifetime EP0450155B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4011039A DE4011039C2 (de) 1990-04-05 1990-04-05 Verfahren zum Befeuchten und Einfärben eines Plattenzylinders einer Mehrfarben-Offset-Bogenrotationsdruckmaschine
DE4011039 1990-04-05

Publications (2)

Publication Number Publication Date
EP0450155A1 true EP0450155A1 (fr) 1991-10-09
EP0450155B1 EP0450155B1 (fr) 1994-06-15

Family

ID=6403839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122372A Expired - Lifetime EP0450155B1 (fr) 1990-04-05 1990-11-23 Procédé d'humidification et d'encrage d'un cliché positionné sur un cylindre porte-plaque

Country Status (4)

Country Link
EP (1) EP0450155B1 (fr)
JP (1) JP2997084B2 (fr)
AT (1) ATE107227T1 (fr)
DE (2) DE4011039C2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2729333A1 (fr) * 1995-01-17 1996-07-19 Roland Man Druckmasch Unite de mouillage
EP0697283A3 (fr) * 1994-08-18 1996-12-18 Roland Man Druckmasch Procédé pour démarrer une unité de mouillage d'une machine d'impression offset
EP0761431A1 (fr) * 1995-08-09 1997-03-12 MAN Roland Druckmaschinen AG Dispositif de mouillage pour une machine à imprimer en offset
EP0761432A1 (fr) * 1995-08-09 1997-03-12 MAN Roland Druckmaschinen AG Dispositif de mouillage pour une machine à imprimer en offset
FR2762254A1 (fr) * 1997-04-17 1998-10-23 Roland Man Druckmasch Unite de mouillage pour une machine d'impression offset
EP1164012A2 (fr) 2000-05-17 2001-12-19 Komori Corporation Procédé pour prélever de l'encre pour une presse d'impression
EP1369234A1 (fr) * 2002-06-07 2003-12-10 Koenig & Bauer Aktiengesellschaft Procédé pour recommencer l'impression après une interruption

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4312229C2 (de) * 1993-04-14 1999-10-28 Heidelberger Druckmasch Ag Verfahren zur definierten Erzeugung einer dem Fortdruck nahen Farbverteilung im Farbwerk von Rotationsdruckmaschinen
DE19506639C2 (de) * 1995-02-25 1997-03-13 Roland Man Druckmasch Steuerung für ein kombiniertes Farb-Feuchtwerk
DE19510082C2 (de) * 1995-03-20 1997-07-17 Roland Man Druckmasch Verfahren und Vorrichtung zur Steuerung der Bogenzufuhr bei einer bogenverarbeitenden Offsetdruckmaschine
DE19645169C2 (de) * 1996-11-02 2000-02-03 Roland Man Druckmasch Verfahren zur Reinigung von Zylindern und Walzen in einer Druckmaschine
DE20303902U1 (de) 2003-03-12 2003-05-08 Roland Man Druckmasch Kombiniertes Farb- und Feuchtwerk für eine Druckmaschine
DE102004047168A1 (de) * 2004-09-29 2006-04-06 Man Roland Druckmaschinen Ag Druckeinheit einer Druckmaschine
DE102007034880A1 (de) * 2007-07-24 2009-01-29 Heidelberger Druckmaschinen Ag Entwicklung von Druckplatten in Offsetdruckmaschinen
DE102008007680A1 (de) * 2008-02-07 2009-11-05 Manroland Ag Druckwerk für eine Verarbeitungsmaschine
DE102008001302A1 (de) * 2008-04-22 2009-10-29 Manroland Ag Druckmaschine und Verfahren zum Betreiben derselben

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1044042A (en) * 1963-07-01 1966-09-28 Dahlgren Harold P Method and means for dampening lithographic offset printing plates
GB1377116A (en) * 1972-11-30 1974-12-11 Polygraph Leipzig Dampening devices for off-set printing machines
DE2343935A1 (de) * 1973-08-31 1975-03-13 Maschf Augsburg Nuernberg Ag Feuchtwerk fuer rotations-offsetdruckmaschinen
GB2077660A (en) * 1980-06-13 1981-12-23 Vickers Ltd Lithographic printing presses
FR2590842A1 (fr) * 1985-12-04 1987-06-05 Ghisalberti Luigi Unite d'impression reversible pour machines offset, comportant des dispositifs de mouillage et de vernissage
FR2601289A1 (fr) * 1986-07-12 1988-01-15 Miller Johannisberg Druckmasch Mecanisme pour deposer un film d'humidificateur dans des machines d'impression offset.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1207220A (en) * 1968-07-03 1970-09-30 Pfizer & Co C Paper coating and coated paper
DE2845932A1 (de) * 1978-10-21 1980-04-24 Heidelberger Druckmasch Ag Kombiniertes feucht-farbwerk fuer offsetdruckwerke
DE3146223C2 (de) * 1981-11-21 1985-03-21 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Feucht-Farbwerk für Offsetdruckmaschinen
JPH0741707B2 (ja) * 1988-05-06 1995-05-10 リョービ株式会社 操作レバーを有するオフセット印刷機
JPH0299637U (fr) * 1989-01-27 1990-08-08

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1044042A (en) * 1963-07-01 1966-09-28 Dahlgren Harold P Method and means for dampening lithographic offset printing plates
GB1377116A (en) * 1972-11-30 1974-12-11 Polygraph Leipzig Dampening devices for off-set printing machines
DE2343935A1 (de) * 1973-08-31 1975-03-13 Maschf Augsburg Nuernberg Ag Feuchtwerk fuer rotations-offsetdruckmaschinen
GB2077660A (en) * 1980-06-13 1981-12-23 Vickers Ltd Lithographic printing presses
FR2590842A1 (fr) * 1985-12-04 1987-06-05 Ghisalberti Luigi Unite d'impression reversible pour machines offset, comportant des dispositifs de mouillage et de vernissage
FR2601289A1 (fr) * 1986-07-12 1988-01-15 Miller Johannisberg Druckmasch Mecanisme pour deposer un film d'humidificateur dans des machines d'impression offset.

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0697283A3 (fr) * 1994-08-18 1996-12-18 Roland Man Druckmasch Procédé pour démarrer une unité de mouillage d'une machine d'impression offset
FR2729333A1 (fr) * 1995-01-17 1996-07-19 Roland Man Druckmasch Unite de mouillage
EP0761431A1 (fr) * 1995-08-09 1997-03-12 MAN Roland Druckmaschinen AG Dispositif de mouillage pour une machine à imprimer en offset
EP0761432A1 (fr) * 1995-08-09 1997-03-12 MAN Roland Druckmaschinen AG Dispositif de mouillage pour une machine à imprimer en offset
FR2762254A1 (fr) * 1997-04-17 1998-10-23 Roland Man Druckmasch Unite de mouillage pour une machine d'impression offset
EP1164012A2 (fr) 2000-05-17 2001-12-19 Komori Corporation Procédé pour prélever de l'encre pour une presse d'impression
EP1164012A3 (fr) * 2000-05-17 2007-04-11 Komori Corporation Procédé pour prélever de l'encre pour une presse d'impression
EP1369234A1 (fr) * 2002-06-07 2003-12-10 Koenig & Bauer Aktiengesellschaft Procédé pour recommencer l'impression après une interruption

Also Published As

Publication number Publication date
DE4011039A1 (de) 1991-10-10
EP0450155B1 (fr) 1994-06-15
DE4011039C2 (de) 1996-03-14
DE59006152D1 (de) 1994-07-21
JPH04226352A (ja) 1992-08-17
JP2997084B2 (ja) 2000-01-11
ATE107227T1 (de) 1994-07-15

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