EP0224033A2 - Short-inking device for a rotary offset printing press - Google Patents

Short-inking device for a rotary offset printing press Download PDF

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Publication number
EP0224033A2
EP0224033A2 EP86114658A EP86114658A EP0224033A2 EP 0224033 A2 EP0224033 A2 EP 0224033A2 EP 86114658 A EP86114658 A EP 86114658A EP 86114658 A EP86114658 A EP 86114658A EP 0224033 A2 EP0224033 A2 EP 0224033A2
Authority
EP
European Patent Office
Prior art keywords
ink
offset printing
offset
short
transport cylinder
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
EP86114658A
Other languages
German (de)
French (fr)
Other versions
EP0224033B1 (en
EP0224033A3 (en
Inventor
Heinrich Konrad Grosshauser
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
Koenig and Bauer 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, Koenig and Bauer AG filed Critical Koenig and Bauer Albert AG
Publication of EP0224033A2 publication Critical patent/EP0224033A2/en
Publication of EP0224033A3 publication Critical patent/EP0224033A3/en
Application granted granted Critical
Publication of EP0224033B1 publication Critical patent/EP0224033B1/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
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/06—Lithographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/002—Heating or cooling of ink or ink rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/26—Construction of inking rollers

Definitions

  • the invention relates to a short inking unit for an offset rotary printing press according to claim 1.
  • Offset short inking units are e.g. B. become known from DE-OS 33 02 872.
  • the invention has for its object to improve the fountain solution in an offset short inking unit.
  • the advantages that can be achieved with the invention are, in particular, that it can be prevented that too much dampening liquid gets into the ink supply of the inking unit and the viscosity of the ink is changed as a result of emulsion formation. It is also easily possible to keep the fountain solution consumption in the inking unit low.
  • a plate cylinder 1 of a printing unit of an offset web-fed rotary printing machine is colored by means of a short inking unit.
  • a dampening unit 2 of known construction dampens an offset printing plate 3.
  • a chamber doctor 4, known per se, is used to supply ink to a screened, hard ink transport cylinder 6 (anilox type).
  • the screened ink transport cylinder 6 is continuously heated to about 40-60 ° in a controlled manner.
  • the offset plate cylinder 1 is brought to a temperature optionally between 20 and 25 ° and kept regulated. Devices for heating or cooling ink and printing unit cylinders have been known for a long time and their description is therefore omitted.
  • an air nozzle row 5 can be arranged parallel to the rasterized ink transport cylinder 6, which blows dried air against the rotating ink transport cylinder 6.
  • heat is also given off to the inking rollers 7, 8 and these heat up.
  • the heated inking rollers 7, 8 and especially the heated ink transport cylinder 6 ensure that the excess fountain solution is evaporated on its way to the ink supply, the doctor blade 4 or the ink fountain 9. Blowing the surface of the ink transport cylinder 6 with dry air supports the evaporation of the dampening liquid on and in the printing ink on the way back to the printing ink source 4, 9.
  • the doctor blade 4 is through an ink fountain 9 and replaced the doctor blade 11 placed on the ink transport cylinder 6.
  • An ink fountain roller 12 transports the offset printing ink from the ink fountain 9 onto the surface of the screened ink transport roller 6.
  • Another measure to prevent or reduce the fountain solution transport into the offset printing ink source 4, 9 consists in the special design of the cups 13 and webs 14 of the raster ink transport cylinder 6.
  • the end faces 17 of the webs 14 of the cups 13, over which the doctor blade 11 or the chamber doctor blade 4 slides continuously are chrome-plated, i.e. hydrophilic, and a surface 18 of the cups 13 with an oleophilic one or at least less hydrophilic coating e.g. B. nitrided chrome.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Ink Jet (AREA)
  • Centrifugal Separators (AREA)

Abstract

A short inking unit for an offset rotary printing machine utilizes a heated ink transport cylinder having a particular surface with varying degrees of hydrophilicity, and an array of air blowing nozzles which cooperate to reduce or virtually eliminate contamination of the offset printing ink supply source with dampening fluid. Printing quality is improved since ink viscosity does not change and dampening fluid useage is kept at a minimum.

Description

Die Erfindung betrifft ein Kurzfarbwerk für eine Offset­rotationsdruckmaschine gemäß dem Patentanspruch 1.The invention relates to a short inking unit for an offset rotary printing press according to claim 1.

Offset-Kurzfarbwerke sind z. B. durch die DE-OS 33 02 872 bekannt geworden.Offset short inking units are e.g. B. become known from DE-OS 33 02 872.

Der Erfindung liegt die Aufgabe zugrunde die Feuchtwasser­führung in einem Offset-Kurzfarbwerk zu verbessern.The invention has for its object to improve the fountain solution in an offset short inking unit.

Diese Aufgabe wird erfindungsgemäß durch den kennzeichnenden Teil des Anspruches 1 gelöst.This object is achieved by the characterizing part of claim 1.

Die mit der Erfindung erzielbaren Vorteile bestehen ins­besondere darin, daß verhindert werden kann, daß zu viel Feuchtflüssigkeit in die Farbversorgung des Farbwerkes gelangt und so die Viskosität der Farbe durch Emulsions­bildung verändert wird.
Auch ist es leicht möglich, den Feuchtwasserverbrauch im Farbwerk gering zu halten.The advantages that can be achieved with the invention are, in particular, that it can be prevented that too much dampening liquid gets into the ink supply of the inking unit and the viscosity of the ink is changed as a result of emulsion formation.
It is also easily possible to keep the fountain solution consumption in the inking unit low.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben. Es zeigen

  • Fig. 1 Offset-Kurzfarbwerk mit gerasterter Farbtransport­walze mit Farbzufuhr über ein Kammerrakel,
  • Fig. 2 Offset-Kurzfarbwerk mit gerasterter Farbtransport­walze mit Farbzufuhr über eine Farbkastenwalze,
  • Fig. 3 Querschnitt durch Näpfchen einer gerasterten Farb­transportwalze (vergrößert)
Embodiments of the invention are shown in the drawing and are described in more detail below. Show it
  • 1 short offset inking unit with screened ink transport roller with ink supply via a chamber doctor blade,
  • 2 short offset inking unit with rastered ink transport roller with ink supply via an ink fountain roller,
  • 3 cross-section through the cups of a rasterized ink transport roller (enlarged)

Ein Plattenzylinder 1 eines Druckwerkes einer Offset-Rollen­rotationsdruckmaschine wird mittels eines Kurzfarbwerkes eingefärbt. Ein Feuchtwerk 2 bekannter Bauweise feuchtet eine Offsetdruckplatte 3. Ein in sich bekanntes Kammerrakel 4 dient zur Farbzufuhr auf einen gerasterten, harten Farb­transportzylinder 6 (Anilox-Typ). Mittels zweier gummibe­zogenener Farbauftragswalzen 7, 8 gelangt die normale Offsetdruckfarbe von dem gerasterten, verchromten Farbtrans­portzylinder 6 auf die Offsetdruckplatte 3. Der gerasterte Farbtransportzylinder 6 ist dauernd auf ca. 40 - 60° geregelt aufgeheizt. Der Offsetplattenzylinder 1 wird auf eine Temperatur wahlweise zwischen 20 und 25° gebracht und geregelt gehalten. Einrichtungen zum Erwärmen bzw. Kühlen von Farb- und Druckwerkszylindern sind seit langem bekannt und deshalb wird auf ihre Beschreibung verzichtet.A plate cylinder 1 of a printing unit of an offset web-fed rotary printing machine is colored by means of a short inking unit. A dampening unit 2 of known construction dampens an offset printing plate 3. A chamber doctor 4, known per se, is used to supply ink to a screened, hard ink transport cylinder 6 (anilox type). By means of two rubber-coated inking rollers 7, 8, the normal offset printing ink passes from the screened, chromed ink transport cylinder 6 to the offset printing plate 3. The screened ink transport cylinder 6 is continuously heated to about 40-60 ° in a controlled manner. The offset plate cylinder 1 is brought to a temperature optionally between 20 and 25 ° and kept regulated. Devices for heating or cooling ink and printing unit cylinders have been known for a long time and their description is therefore omitted.

Außerdem kann eine Luftdüsenreihe 5 parallel zum gerasterten Farbtransportzylinder 6 angeordnet sein, die getrocknete Luft gegen den rotierenden Farbtransportzylinder 6 bläst. Durch das Erwärmen des Farbtransportzylinders 6 wird erreicht, daß Wärme auch an die Farbauftragswalzen 7, 8 abgegeben wird und sich diese erwärmen. Durch die erwärmten Farbauftrags­walzen 7, 8 und vor allem durch den erwärmten Farbtransport­zylinder 6 wird erreicht, daß das überschüssige Feuchtwasser auf seinem Weg bis zur Druckfarbenzufuhr, dem Kammerrakel 4 oder dem Farbkasten 9, verdunstet wird. Das Beblasen der Oberfläche des Farbtransportzylinders 6 mit trockener Luft unterstützt die Verdunstung der Feuchtflüssigkeit auf und in der Druckfarbe auf dem Weg zurück zur Druckfarbenquelle 4, 9.In addition, an air nozzle row 5 can be arranged parallel to the rasterized ink transport cylinder 6, which blows dried air against the rotating ink transport cylinder 6. By heating the ink transport cylinder 6 it is achieved that heat is also given off to the inking rollers 7, 8 and these heat up. The heated inking rollers 7, 8 and especially the heated ink transport cylinder 6 ensure that the excess fountain solution is evaporated on its way to the ink supply, the doctor blade 4 or the ink fountain 9. Blowing the surface of the ink transport cylinder 6 with dry air supports the evaporation of the dampening liquid on and in the printing ink on the way back to the printing ink source 4, 9.

In Fig. 2 ist das Kammerrakel 4 durch einen Farbkasten 9 und das an den Farbtransportzylinder 6 angestellte Rakel 11 ersetzt. Eine Farbkastenwalze 12 transportiert die Offsetdruckfarbe aus dem Farbkasten 9 auf die Oberfläche der gerasterten Farbtransportwalze 6.
Durch die oben beschriebenen Maßnhamen wird erreicht, daß kein oder nur noch wenig Feuchtwasser in die Druckfarben­quelle 4, 9 gelangt und so die Offsetdruckfarbe nicht wasseremuliert wird.In FIG. 2, the doctor blade 4 is through an ink fountain 9 and replaced the doctor blade 11 placed on the ink transport cylinder 6. An ink fountain roller 12 transports the offset printing ink from the ink fountain 9 onto the surface of the screened ink transport roller 6.
The measures described above ensure that no or only a little dampening water gets into the printing ink source 4, 9 and thus the offset printing ink is not water emulated.

Eine weitere Maßnahme, um den Feuchtwassertransport in die Offsetdruckfarbenquelle 4, 9 zu verhindern bzw. ver­mindern besteht in der besonderen Gestaltung der Näpfchen 13 und Stege 14 des gerasteren Farbtransportzylinders 6.Another measure to prevent or reduce the fountain solution transport into the offset printing ink source 4, 9 consists in the special design of the cups 13 and webs 14 of the raster ink transport cylinder 6.

Wegen der Erhaltung der Verschleißfestigkeit des gerasterten Mantels 16 des Farbtransportzylinders 6 sind die Stirn­flächen 17 der Stege 14 der Näpfchen 13, - über die das Rakel 11 oder das Kammerrakel 4 fortlaufend streift - verchromt, also hydrophil und eine Oberfläche 18 der Näpfchen 13 mit einem oleophilen oder zumindest weniger hydrophilen Überzug z. B. nitriertes Chrom, besteht.Because of the preservation of the wear resistance of the screened jacket 16 of the ink transport cylinder 6, the end faces 17 of the webs 14 of the cups 13, over which the doctor blade 11 or the chamber doctor blade 4 slides continuously, are chrome-plated, i.e. hydrophilic, and a surface 18 of the cups 13 with an oleophilic one or at least less hydrophilic coating e.g. B. nitrided chrome.

TeilelisteParts list

  • 1 Plattenzylinder1 plate cylinder
  • 2 Feuchtwerk2 dampening system
  • 3 Offsetdruckplatte3 offset printing plate
  • 4 Kammerrakel4 chamber doctor blades
  • 5 Luftdüsenreihe5 row of air nozzles
  • 6 Farbtransportzylinder6 ink transport cylinders
  • 7 Farbauftragswalze7 inking roller
  • 8 Farbauftragswalze8 inking roller
  • 9 Farbkasten9 color box
  • 10 -10 -
  • 11 Rakel11 squeegees
  • 12 Farbkastenwalze12 ink fountain roller
  • 13 Näpfchen13 cells
  • 14 Stege14 bridges
  • 15 -15 -
  • 16 Mantel (6)16 coat (6)
  • 17 Stirnfläche (6)17 end face (6)
  • 18 Oberfläche (13)18 surface (13)
  • 1919th
  • 2020th
  • 2121st
  • 2222
  • 2323
  • 2424th
  • 2525th

Claims (5)

1. Offsetdruckwerk mit einem Kurzfarbwerk, dadurch gekenn­zeichnet, daß ein auf eine vorwählbare Temperatur erwärm­barer gerasterter Farbtransportzylinder (6) und ein auf eine vorwählbare Temperatur abkühlbarer Offsetplatten­zylinder (1) vorgesehen sind.1. Offset printing unit with a short inking unit, characterized in that a screened ink transport cylinder (6) which can be heated to a preselectable temperature and an offset plate cylinder (1) which can be cooled to a preselectable temperature are provided. 2. Offsetdruckwerk mit einem Kurzfarbwerk, welche einen gerasterten Farbtransportzylinder mit Stegen und Näpfchen aufweist, dadurch gekennzeichnet, daß eine Oberfläche (17) der Stege (14) aus einem hydrophilen Material besteht, daß eine Oberfläche (18) der Näpfchen (13) aus einem oleophilen Material besteht.2. offset printing unit with a short inking unit, which has a rasterized ink transport cylinder with webs and cells, characterized in that a surface (17) of the webs (14) consists of a hydrophilic material, that a surface (18) of the cells (13) from one oleophilic material. 3. Offsetdruckwerk nach Anspruch 2, dadurch gekennzeichnet, daß das hydrophile Material aus Chrom besteht.3. Offset printing unit according to claim 2, characterized in that the hydrophilic material consists of chromium. 4. Offsetdruckwerk nach einem der Ansprüche 2 bis 3, dadurch gekennzeichnet, daß die Oberfläche (18) der Näpfchen (13) aus einem oleophilen Material besteht.4. Offset printing unit according to one of claims 2 to 3, characterized in that the surface (18) of the cups (13) consists of an oleophilic material. 5. Offsetdruckwerk nach Anspruch 3, dadurch gekennzeichnet, daß das oleophile Material aus nitriertem Chrom besteht.5. Offset printing unit according to claim 3, characterized in that the oleophilic material consists of nitrided chromium.
EP86114658A 1985-11-23 1986-10-22 Short-inking device for a rotary offset printing press Expired - Lifetime EP0224033B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541458 1985-11-23
DE19853541458 DE3541458A1 (en) 1985-11-23 1985-11-23 SHORT INKS FOR OFFSETROTATION PRINTING MACHINES

Publications (3)

Publication Number Publication Date
EP0224033A2 true EP0224033A2 (en) 1987-06-03
EP0224033A3 EP0224033A3 (en) 1989-05-10
EP0224033B1 EP0224033B1 (en) 1995-01-11

Family

ID=6286655

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114658A Expired - Lifetime EP0224033B1 (en) 1985-11-23 1986-10-22 Short-inking device for a rotary offset printing press

Country Status (7)

Country Link
US (1) US4753165A (en)
EP (1) EP0224033B1 (en)
JP (2) JPS62130853A (en)
AT (1) ATE116904T1 (en)
DD (1) DD250689A5 (en)
DE (2) DE3541458A1 (en)
SU (1) SU1510713A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0722832A2 (en) * 1995-01-23 1996-07-24 Gale Gate Investments Ltd. Improvements in or relating to printing

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DE3706011A1 (en) * 1987-02-25 1988-09-08 Roland Man Druckmasch SHORT COLOR PLANT
DE3725971A1 (en) * 1987-08-05 1989-02-16 Helmut Prof Dr Ing Rech Damping-medium barrier to increase the efficiency of the offset printing process
US5085142A (en) * 1988-03-08 1992-02-04 Smith Maurice D Dampening fluid evaporator
US5209160A (en) * 1988-03-08 1993-05-11 Smith Maurice D Blower mounting for dampening fluid evaporator
DE3814049A1 (en) * 1988-04-26 1989-11-09 Koenig & Bauer Ag METHOD AND DEVICE FOR FLEXO PRINTING
JPH0286449A (en) * 1988-09-22 1990-03-27 Mitsubishi Heavy Ind Ltd Ink feed device
JP2566699B2 (en) * 1990-03-03 1996-12-25 アルバート―フランケンタール アクチエンゲゼルシヤフト Short-path inking system for web offset rotary presses.
DE4202544A1 (en) * 1992-01-30 1993-08-05 Baldwin Gegenheimer Gmbh PRINT PLATE TEMPERATURE SYSTEM FOR A PRINTING MACHINE
DE4424920C2 (en) * 1994-07-14 1996-06-20 Koenig & Bauer Albert Ag Short inking unit for an offset rotary printing press
AU3013695A (en) * 1994-08-18 1996-02-29 Martin David Allum A method and device for controlling the temperature of an image cylinder in a printing-press
DE19527889C2 (en) * 1995-07-29 1997-07-17 Koenig & Bauer Albert Ag Short inking unit for inking a planographic printing plate
DE19924997A1 (en) 1999-05-31 2000-12-07 Heidelberger Druckmasch Ag Inking unit for a printing press
DE19926749B4 (en) * 1999-06-11 2008-11-20 Heidelberger Druckmaschinen Ag Inking unit for a printing press
DE10032351A1 (en) 1999-07-23 2001-01-25 Heidelberger Druckmasch Ag Inking mechanism in off-set printer has ultra sound transmitter producing ultrasonic vibrations in exposed surface section carrying wetting agent to atomise same
DE10020510A1 (en) * 2000-04-26 2001-11-15 Roland Man Druckmasch Dosing system for inking rollers in a printing machine
DE10246271A1 (en) * 2002-10-02 2004-04-15 Windmöller & Hölscher Kg Ink density setting device for rotary printing press has thinning-out device for solvent solution
CN1939721B (en) * 2005-09-27 2010-12-15 海德堡印刷机械股份公司 Press temperature controlling method
DE102006056315B4 (en) * 2006-11-29 2018-05-30 Koenig & Bauer Ag Method for operating a short inking unit for offset rotary printing presses
NL2001608C2 (en) * 2008-05-22 2009-11-24 Mps Holding B V Printing module for use in an offset printing device and offset printing device provided with such a printing module.
DE102008042620B4 (en) * 2008-10-06 2010-11-18 Koenig & Bauer Aktiengesellschaft Apparatus and method for removing dampening solution from an inking unit
DE102016007574A1 (en) * 2016-06-21 2017-12-21 Fresenius Medical Care Deutschland Gmbh Two-component drip edge

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EP0056623A2 (en) * 1981-01-16 1982-07-28 NIEDERMAYR Papierwarenfabrik AG Rotary flexoprinting and indirect rotogravure printing process
JPS59204558A (en) * 1983-05-09 1984-11-19 Tokyo Kikai Seisakusho:Kk Mesh roll for planorgaphic printing
US4637310A (en) * 1983-05-09 1987-01-20 Tokyo Kikai Seusakusho Ltd. Mesh roller for printing press and method of fabrication
US4537127A (en) * 1984-09-12 1985-08-27 Rockwell International Corporation Black oxide lithographic ink metering roller
EP0177666A2 (en) * 1984-09-12 1986-04-16 Rockwell International Corporation Ink metering roller for lithographic printing and process for producing same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0722832A2 (en) * 1995-01-23 1996-07-24 Gale Gate Investments Ltd. Improvements in or relating to printing
EP0722832A3 (en) * 1995-01-23 1996-07-31 Gale Gate Investments Ltd. Improvements in or relating to printing

Also Published As

Publication number Publication date
DE3541458A1 (en) 1987-05-27
EP0224033B1 (en) 1995-01-11
DE3541458C2 (en) 1989-11-30
ATE116904T1 (en) 1995-01-15
SU1510713A3 (en) 1989-09-23
US4753165A (en) 1988-06-28
JPS62130853A (en) 1987-06-13
DD250689A5 (en) 1987-10-21
EP0224033A3 (en) 1989-05-10
DE3650203D1 (en) 1995-02-23
JPS62176845A (en) 1987-08-03

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