EP0700782A2 - Metering roller in a damping unit of an offset printing machine - Google Patents

Metering roller in a damping unit of an offset printing machine Download PDF

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Publication number
EP0700782A2
EP0700782A2 EP95113647A EP95113647A EP0700782A2 EP 0700782 A2 EP0700782 A2 EP 0700782A2 EP 95113647 A EP95113647 A EP 95113647A EP 95113647 A EP95113647 A EP 95113647A EP 0700782 A2 EP0700782 A2 EP 0700782A2
Authority
EP
European Patent Office
Prior art keywords
roller
dampening
dampening solution
metering roller
pickup
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
EP95113647A
Other languages
German (de)
French (fr)
Other versions
EP0700782B1 (en
EP0700782A3 (en
Inventor
Gerd Laubmann
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 EP0700782A2 publication Critical patent/EP0700782A2/en
Publication of EP0700782A3 publication Critical patent/EP0700782A3/en
Application granted granted Critical
Publication of EP0700782B1 publication Critical patent/EP0700782B1/en
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
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0054—Devices for controlling dampening
    • 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 metering roller for a film dampening unit of an offset rotary printing press according to the preamble of the claim.
  • a dampening unit for a lithographic printing machine with at least one dampening solution application roller is known, by means of which the dampening solution can be applied to a plate cylinder and a roller or dampening solution duct connected upstream of the dampening solution application roller has become known.
  • the metering roller can be skewed relative to the dampening agent application roller or the dampening solution ductor for the purpose of dampening solution metering, the diameter at the ends of the metering roller being larger than in its central region.
  • the invention has for its object to provide a metering roller for a dampening system, the Dampening solution metering is repeatable depending on the print order.
  • each print job can be repeated at any time with the same print quality and without great loss of time or waste.
  • a dampening unit consists of a dampening agent application roller 2 interacting with a plate cylinder 1, a dampening solution duct 3 and a metering roller 4 that can be adjusted to the dampening solution 3 pivoted levers 7 and can be turned by turning eccentric bushings 8 in their distance a between the journal 6 of the dampening solution 3 and the journal 9 of the metering roller 4 can be set.
  • the sleeve 8 is positively connected to a first end of a lever 11, while a second end of the lever 11 is connected in an articulated manner to a motor-gear unit 12 with an integrated position indicator or potentiometer 13.
  • the motor-gear unit 12 is articulated between an end of the lever 7 remote from the dampening medium and said lever 11.
  • the dampening solution duct 3 is immersed in a dampening solution container 15.
  • a motor-gear unit 16 with an integrated position indicator or potentiometer 17, which is articulated between the end 7 of the lever 7 carrying the metering roller 4 and a side frame 14, with an integrated position indicator or potentiometer 17, each lever 7 can be pivoted and thus the metering roller 4 can be tilted with respect to the dampening unit 3.
  • the diameter of both ends of the metering roller 4 can be larger than the diameter of the central region of the metering roller 4.
  • Each of the parts 6 to 9, 11 to 14 and 16, 17, 19 and 21 is provided twice, ie separately for each end face of the dampening solution 3 or the metering roller 4, but only shown once in the drawing and labeled only once.
  • Each potentiometer 13; 17 of the motor gear units 12; 16 is for the purpose of position feedback with a z. B. in Machine control station existing computer 18 connected, while the computer 18 with each motor-gear unit 12; 16 via an amplifier 19; 21 communicates.
  • a strip-shaped dampening solution thickness control device 22 which scans the surface of the dampening solution 3 in the direction parallel to the axis is connected to the computer 18 and its memory 23 and transfers information about the amount of dampening solution transferred from the metering roller 4 to the dampening application roller 2 by means of the dampening solution 3.
  • the computer 18 is also connected to a higher-level controller or keyboard 24 for the purpose of entering control commands and to a monitor 26.
  • a plurality of dampening agent thickness control devices 22 spaced apart from one another in the axis-parallel direction of the dampening solution duct 3 are provided.
  • the distance a and thus the contact pressure of the metering roller 4 on the dampening solution 3 is preset according to the printing requirements by means of the keyboard 24.
  • a different amount of dampening solution over the length of the dampening solution generator 3 can be preset by means of the motor drive unit 16 due to the separate inclination of the levers 7.
  • the dampening agent thickness control devices 22 arranged in the axis-parallel direction to the dampening agent duct 3 are guided the measurement results to the computer 18, the actual values being compared with the target values on the monitor 26 and, if necessary, a correction being able to be initiated using the keyboard 18.
  • the stored dampening solution values per print job can be called up at any time from the memory 23 of the computer 18 for repeat jobs and used for metering the amount of dampening solution.

Landscapes

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

Abstract

The moisture dosing of the process roller is via a pickup roller (3) partially in the fluid reservoir and transferring a controlled feed to an applicator roller (2) in contact with the process roller (1). A pressure roller (4) in variable contact with the pickup roller controls the rate of pickup which is measured by a thickness monitor (22) with feedback control for the roller position mountings. These have mounting arms (7, 11) moved by servo motors (12, 16). The processor control (18) monitors the measured signals and adjusts the main mounting arm (7) to vary the contact between the pickup roller and applicator roller. The pressure roller has an adjuster arm (11) with an eccentric axle mounting (8, 9) to vary the pressure onto the pickup roller.

Description

Die Erfindung betrifft eine Dosierwalze für ein Filmfeuchtwerk einer Offsetrotationsdruckmaschine entsprechend dem Oberbegriff des Anspruches.The invention relates to a metering roller for a film dampening unit of an offset rotary printing press according to the preamble of the claim.

Durch die DT 20 54 678 ist ein Feuchtwerk für ein lithografische Druckmaschine mit mindestens einer Feuchtmittelauftragswalze bekannt, mittels welcher das Feuchtmittel auf einen Plattenzylinder aufbringbar ist und einer der Feuchtmittelauftragswalze vorgeschalteten Walze bzw. Feuchtmittelduktor bekanntgeworden. Dabei ist die Dosierwalze gegenüber der Feuchmittelauftragswalze bzw. dem Feuchtmittelduktor zwecks Feuchtmitteldosierung schiefstellbar, wobei der Durchmesser an den Enden der Dosierwalze größer ist als in seinem mittleren Bereich.From DT 20 54 678 a dampening unit for a lithographic printing machine with at least one dampening solution application roller is known, by means of which the dampening solution can be applied to a plate cylinder and a roller or dampening solution duct connected upstream of the dampening solution application roller has become known. The metering roller can be skewed relative to the dampening agent application roller or the dampening solution ductor for the purpose of dampening solution metering, the diameter at the ends of the metering roller being larger than in its central region.

Nachteilig an diesem Feuchtwerk ist jedoch, daß die einmal eingestellten Werte der Feuchtmitteldosierung für einen gleichen Druckauftrag zu einem späteren Zeitpunkt nur mit größerem Aufwand reproduzierbar sind, wobei viel Makulatur erzeugt wird, um die optimale Feuchtmitteldosierung herauszufinden.A disadvantage of this dampening system, however, is that the values of the dampening solution metering once set for a same print job can only be reproduced with great effort at a later time, with a lot of waste being produced in order to find out the optimal dampening solution metering.

Der Erfindung liegt die Aufgabe zugrunde, eine Dosierwalze für ein Feuchtwerk zu schaffen, deren Feuchtmitteldosierung druckauftragsgebunden wiederholbar ist.The invention has for its object to provide a metering roller for a dampening system, the Dampening solution metering is repeatable depending on the print order.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des kennzeichnenden Teils des Anspruches gelöst.According to the invention, this object is achieved by the features of the characterizing part of the claim.

Durch die Erfindung werden insbesondere folgende Vorteile erzielt: infolge der Speicherung der Daten der Feuchtmitteldosierung jeder Dosierwalze des Feuchtwerkes je Druckauftrag kann jeder Druckauftrag zu einem beliebigen Zeitpunkt mit gleicher Druckqualität und ohne großen Zeitverlust oder Makulaturaufwand wiederholt werden.The following advantages are achieved in particular by the invention: as a result of the storage of the data of the dampening solution metering of each metering roller of the dampening unit per print job, each print job can be repeated at any time with the same print quality and without great loss of time or waste.

Die Erfindung wird nachfolgend an einem Ausführungsbeispiel näher erläutert. Die zugehörige Zeichnung Zeigt eine schematische Seitenansicht eines Feuchtwerkes mit Darstellung von verfahrensnotwendigen Verstell- und Kontrolleinrichtungen.The invention is explained in more detail below using an exemplary embodiment. The accompanying drawing shows a schematic side view of a dampening unit with a representation of adjustment and control devices necessary for the process.

Ein Feuchtwerk besteht aus einer mit einem Plattenzylinder 1 zusammenwirkenden Feuchtmittelauftragswalze 2, einem Feuchtmittelduktor 3 und einer an den Feuchtmittelduktor 3 anstellbare Dosierwalze 4. Während der Feuchtmittelduktor 3 über seine Achszapfen 6 seitengestellfest gelagert ist, ist die Dosierwalze 4 in um die Achszapfen 6 des Feuchtmittelduktors 3 schwenkbaren Hebeln 7 gelagert und kann durch Verdrehen von exzentrischen Büchsen 8 in ihrem Abstand a zwischen den Achszapfen 6 des Feuchtmitteldukors 3 sowie Achszapfen 9 der Dosierwalze 4 eingestellt werden. Dazu ist die Büchse 8 formschlüssig mit einem ersten Ende eines Hebels 11 verbunden, während ein zweites Ende des Hebels 11 gelenkig mit einer Motor-Getriebeeinheit 12 mit integriertem Stellungsanzeiger bzw. Potentiometer 13 verbunden ist. Die Motor-Getriebeeinheit 12 ist zwischen einem feuchtmittelduktorfernen Ende des Hebels 7 und dem genannten Hebel 11 gelenkig gelagert. Der Feuchtmittelduktor 3 taucht in einen Feuchtmittelbehälter 15 ein. Durch Betätigen einer zwischen dem feuchtmittelduktorfernen Ende des die Dosierwalze 4 tragenden Hebels 7 und einem Seitengestell 14 gelenkig angeordneter Motor-Getriebeeinheit 16 mit integriertem Stellungsanzeiger bzw. Potentiometer 17 kann jeder Hebel 7 verschwenkt und somit die Dosierwalze 4 gegenüber dem Feuchtmittelduktor 3 schiefgestellt werden. Der Durchmesser beider Enden der Dosierwalze 4 kann größer sein als der Durchmesser des mittleren Bereiches der Dosierwalze 4.A dampening unit consists of a dampening agent application roller 2 interacting with a plate cylinder 1, a dampening solution duct 3 and a metering roller 4 that can be adjusted to the dampening solution 3 pivoted levers 7 and can be turned by turning eccentric bushings 8 in their distance a between the journal 6 of the dampening solution 3 and the journal 9 of the metering roller 4 can be set. For this purpose, the sleeve 8 is positively connected to a first end of a lever 11, while a second end of the lever 11 is connected in an articulated manner to a motor-gear unit 12 with an integrated position indicator or potentiometer 13. The motor-gear unit 12 is articulated between an end of the lever 7 remote from the dampening medium and said lever 11. The dampening solution duct 3 is immersed in a dampening solution container 15. By actuating a motor-gear unit 16 with an integrated position indicator or potentiometer 17, which is articulated between the end 7 of the lever 7 carrying the metering roller 4 and a side frame 14, with an integrated position indicator or potentiometer 17, each lever 7 can be pivoted and thus the metering roller 4 can be tilted with respect to the dampening unit 3. The diameter of both ends of the metering roller 4 can be larger than the diameter of the central region of the metering roller 4.

Jeder der Teile 6 bis 9, 11 bis 14 sowie 16, 17, 19 und 21 ist zweimal vorhanden, d. h. separat für jede Stirnseite des Feuchtmittelduktors 3 bzw. der Dosierwalze 4, jedoch nur einmal in der Zeichnung dargestellt und nur einmal bezeichnet. Jedes Potentiometer 13; 17 der Motor-Getriebeeinheiten 12; 16 ist zwecks Stellungsrückmeldung mit einem z. B. im Maschinenleitstand vorhandenen Computer 18 verbunden, während der Computer 18 mit jeder Motor-Getriebeeinheit 12; 16 über einen Verstärker 19; 21 in Verbindung steht. Ein streifenförmig die Oberfläche des Feuchtmittelduktors 3 in achsparalleler Richtung abtastendes Feuchtmitteldickenkontrollgerät 22 ist mit dem Computer 18 sowie dessen Speicher 23 verbunden und übergibt Informationen über die von der Dosierwalze 4 zur Feuchtmittelauftragswalze 2 mittels des Feuchtmittelduktors 3 übertragenen Feuchtmittelmenge. Der Computer 18 ist weiterhin mit einer übergeordneten Steuerung oder Tastatur 24 zwecks Eingabe von Steuerbefehlen sowie mit einem Monitor 26 verbunden. Zweckmäßigerweise sind jedoch mehrere in achsparalleler Richtung des Feuchtmittelduktors 3 zueinander beabstandete Feuchtmitteldickenkontrollgeräte 22 vorgesehen.Each of the parts 6 to 9, 11 to 14 and 16, 17, 19 and 21 is provided twice, ie separately for each end face of the dampening solution 3 or the metering roller 4, but only shown once in the drawing and labeled only once. Each potentiometer 13; 17 of the motor gear units 12; 16 is for the purpose of position feedback with a z. B. in Machine control station existing computer 18 connected, while the computer 18 with each motor-gear unit 12; 16 via an amplifier 19; 21 communicates. A strip-shaped dampening solution thickness control device 22 which scans the surface of the dampening solution 3 in the direction parallel to the axis is connected to the computer 18 and its memory 23 and transfers information about the amount of dampening solution transferred from the metering roller 4 to the dampening application roller 2 by means of the dampening solution 3. The computer 18 is also connected to a higher-level controller or keyboard 24 for the purpose of entering control commands and to a monitor 26. Expediently, however, a plurality of dampening agent thickness control devices 22 spaced apart from one another in the axis-parallel direction of the dampening solution duct 3 are provided.

Ein Erfassen der Meßwerte beim Einstellen einer Dosierwalze läuft wie folgt ab: mittels der Tastatur 24 wird der Abstand a und somit der Anpreßdruck der Dosierwalze 4 an den Feuchtmittelduktor 3 entsprechend den drucktechnischen Erfordernissen voreingestellt. Desgleichen kann eine über die Länge des Feuchtmittelduktors 3 unterschiedliche Feuchtmittelmenge infolge des separaten Schiefstellens der Hebel 7 mittels der Motor-Getreibeeinheit 16 voreingestellt werden. Die in achsparalleler Richtung zum Feuchtmittelduktor 3 angeeordneten Feuchtmitteldickenkontrollgeräte 22 leiten die Meßergebnisse dem Rechner 18 zu, wobei auf dem Monitor 26 die Istwerte mit den Sollwerten verglichen werden und ggf. mittels der Tastatur 18 eine Korrektur eingeleitet werden kann. Sind die Sollwerte der Feuchtmittelmenge erreicht, so werden diese abgespeichert und es erfolgt eine Regelung der Feuchtmittelmenge. Die abgespeicherten Feuchtmittelwerte je Druckauftrag können bei Wiederholaufträgen jederzeit aus dem Speicher 23 des Computers 18 abgerufen und für die Dosierung der Feuchtmittelmenge verwendet werden.Acquisition of the measured values when setting a metering roller takes place as follows: the distance a and thus the contact pressure of the metering roller 4 on the dampening solution 3 is preset according to the printing requirements by means of the keyboard 24. Likewise, a different amount of dampening solution over the length of the dampening solution generator 3 can be preset by means of the motor drive unit 16 due to the separate inclination of the levers 7. The dampening agent thickness control devices 22 arranged in the axis-parallel direction to the dampening agent duct 3 are guided the measurement results to the computer 18, the actual values being compared with the target values on the monitor 26 and, if necessary, a correction being able to be initiated using the keyboard 18. Once the setpoint values for the amount of dampening solution have been reached, they are saved and the amount of dampening solution is regulated. The stored dampening solution values per print job can be called up at any time from the memory 23 of the computer 18 for repeat jobs and used for metering the amount of dampening solution.

TeilelisteParts list

11
PlattenzylinderPlate cylinder
22nd
FeuchtmittelauftragswalzeFountain roller
33rd
FeuchtmittelduktorDampening solution
44th
DosierwalzeDosing roller
55
--
66
Achszapfen (3)Journal (3)
77
Hebel (3, 4)Lever (3, 4)
88th
Büchse, exzentrisch (9)Rifle, eccentric (9)
99
Achszapfen (4)Journal (4)
1010th
--
1111
Hebellever
1212th
Motor-GetriebeeinheitMotor gear unit
1313
Potentiometer (12)Potentiometer (12)
1414
SeitengestellSide frame
1515
FeuchtmittelbehälterFountain solution container
1616
Motor-GetriebeeinheitMotor gear unit
1717th
Potentiomoter (16)Potentiometers (16)
1818th
Computercomputer
1919th
Verstärker (12)Amplifier (12)
2020th
--
2121
Verstärker (16)Amplifier (16)
2222
FeuchtmitteldickenkontrollgerätDampening solution thickness control device
2323
Speicher (18)Memory (18)
2424th
Tastatur (18)Keyboard (18)
2525th
--
2626
Monitor (18)Monitor (18)
aa
Abstand (6, 9)Distance (6, 9)

Claims (1)

Dosierwalze (4) für ein Feuchtwerk (2; 3; 4; 14) einer Offsetrotationsdruckmaschine, nach welchem die Dosierwalze (4) gegen einen Feuchtmittelduktor (3) anpreßbar sowie schiefstellbar ist, dadurch gekennzeichnet, daß die Anpressung sowie Schiefstellung der Dosierwalze (4) entsprechend der von Feuchtmitteldickenkontrollgeräten (22) erfaßten Feuchtmitteldicke die kontrolliert wird, daß die jeweilige über eine Motor-Getriebeeinheit (12; 16) eingestellte druckauftragsgerechte Stellung der Dosierwalze (4) jeweils mittels eines Stellungsanzeigers (13; 17) erfaßt und abrufbereit in einen Speicher (23) eines Rechners (18) aufgenommen wird.Dosing roller (4) for a dampening unit (2; 3; 4; 14) of an offset rotary printing machine, according to which the dosing roller (4) can be pressed against a dampening solution ductor (3) and tilted, characterized in that the pressing and inclination of the dosing roller (4) Corresponding to the dampening solution thickness detected by dampening solution thickness control devices (22), it is checked that the respective position of the metering roller (4) set by a motor-gear unit (12; 16) is detected by a position indicator (13; 17) and is ready to be called up in a memory ( 23) of a computer (18) is recorded.
EP95113647A 1994-09-06 1995-08-31 Damping unit of an offset printing machine Expired - Lifetime EP0700782B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4431646 1994-09-06
DE4431646A DE4431646A1 (en) 1994-09-06 1994-09-06 Dosing roller on a dampening unit of an offset rotary printing press

Publications (3)

Publication Number Publication Date
EP0700782A2 true EP0700782A2 (en) 1996-03-13
EP0700782A3 EP0700782A3 (en) 1997-03-12
EP0700782B1 EP0700782B1 (en) 2000-01-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113647A Expired - Lifetime EP0700782B1 (en) 1994-09-06 1995-08-31 Damping unit of an offset printing machine

Country Status (2)

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EP (1) EP0700782B1 (en)
DE (2) DE4431646A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1593497A2 (en) * 2004-05-05 2005-11-09 MAN Roland Druckmaschinen AG Dampener for a printing machine
US7225735B2 (en) 2004-05-03 2007-06-05 Heidelberger Druckmaschinen Ag Method for roller adjustment in a printing press

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005015791B4 (en) 2004-05-03 2023-10-26 Heidelberger Druckmaschinen Ag Method for adjusting rollers in a printing press
DE102008061599A1 (en) 2008-12-11 2009-12-03 Heidelberger Druckmaschinen Ag Dampening device adjusting method for offset printing machine, involves adjusting contact pressure of one of immersed roller and dosing roller and/or offsetting of one roller relative to other roller by motor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2054678A1 (en) 1970-11-06 1972-10-26 Roland Offsetmaschinenfabnk Fa ber & Schleicher AG, 6050 Offenbach Dampening system for lithographic printing machines

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000692A (en) * 1974-12-03 1977-01-04 Roland Offsetmaschinenfabrik Faber & Schleicher Ag Throw-off system for rotary offset printing press
FR2561584B1 (en) * 1984-03-21 1987-06-26 Marinoni Harris Sa WATER FILM WETTING DEVICE AND ITS USE ON PRINTING UNITS FOR OFFSET PRESSES
IT1211266B (en) * 1987-08-17 1989-10-12 Grapho Eng Srl AUTOMATIC ADJUSTMENT CONTINUOUS WATERING SYSTEM FOR OFFSET PRINTING MACHINES
DE3912811A1 (en) * 1989-04-19 1990-10-25 Heidelberger Druckmasch Ag METHOD AND DEVICE FOR THE MOISTANT CONTROLLING OF AN OFFSET PRINTING MACHINE

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2054678A1 (en) 1970-11-06 1972-10-26 Roland Offsetmaschinenfabnk Fa ber & Schleicher AG, 6050 Offenbach Dampening system for lithographic printing machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7225735B2 (en) 2004-05-03 2007-06-05 Heidelberger Druckmaschinen Ag Method for roller adjustment in a printing press
EP1593497A2 (en) * 2004-05-05 2005-11-09 MAN Roland Druckmaschinen AG Dampener for a printing machine
EP1593497A3 (en) * 2004-05-05 2006-06-07 MAN Roland Druckmaschinen AG Dampener for a printing machine

Also Published As

Publication number Publication date
EP0700782B1 (en) 2000-01-19
DE59507633D1 (en) 2000-02-24
DE4431646A1 (en) 1996-03-07
EP0700782A3 (en) 1997-03-12

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