EP1270219A1 - Vorrichtung und Verfahren zum Offsetdrucken - Google Patents

Vorrichtung und Verfahren zum Offsetdrucken Download PDF

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Publication number
EP1270219A1
EP1270219A1 EP02291570A EP02291570A EP1270219A1 EP 1270219 A1 EP1270219 A1 EP 1270219A1 EP 02291570 A EP02291570 A EP 02291570A EP 02291570 A EP02291570 A EP 02291570A EP 1270219 A1 EP1270219 A1 EP 1270219A1
Authority
EP
European Patent Office
Prior art keywords
temperature
cylinder
blanket
offset printing
inking
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.)
Withdrawn
Application number
EP02291570A
Other languages
English (en)
French (fr)
Inventor
Michel Dumoulin
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.)
Enoflex SpA
Original Assignee
Sparflex SA
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 Sparflex SA filed Critical Sparflex SA
Publication of EP1270219A1 publication Critical patent/EP1270219A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/22—Means for cooling or heating forme or impression cylinders

Definitions

  • the present invention relates to improved methods and offset printing devices.
  • the devices used in offset printing include generally an inking battery which deposits the ink on a cylinder which carries the plaque bearing the motif to be reproduced. This cylinder is called cylinder plate.
  • This plate cylinder is in contact with a cylinder which carries a blanket - blanket cylinder - which is itself brought into contact with the paper which is inserted between this blanket cylinder, more precisely the blanket itself, and a back pressure cylinder.
  • the object of the present invention is therefore to further improve the stability and the quality of the print obtained.
  • the temperature T3 of the blanket cylinder (5) is regulated, and that, on the other hand, the respective temperatures T1 of the battery anchor (1) and T2 of the plate cylinder (3) are regulated regardless of T3.
  • the temperature control means include means for regulating on the one hand the temperature T3 of the cylinder blanket holder, and, on the other hand, respective temperatures T1 of the inking battery and T2 of the plate cylinder regardless of regulation of T3, temperature of the blanket cylinder.
  • the temperature regulation means each include a electric heating or a circulation of heat transfer liquid placed at least partially inside the corresponding cylinder.
  • the single figure shows an offset printing device.
  • a group 1 is brought into contact with the plate 2 supported by the plate cylinder 3.
  • This plate 2 is brought into contact with the blanket 4 carried by the cylinder blanket holder 5.
  • the paper 6 is pressed by the back pressure cylinder 7 on the blanket 4.
  • a regulation of blanket holder temperature 5 equips the machines.
  • the areas solid areas and the halftone dots of the resulting print have an aspect consistent across the width of the print. It is possible to print solid without tearing off the paper layer.
  • a second regulation 9 of the inking battery is provided as well as a third regulation 10 of the cylinder plate holder 3.
  • the invention is particularly useful in the case of its application to a waterless printing process. It is known that the control of this process is even more delicate than controlling the traditional offset process.
  • the specificity of the waterless offset lies in the type of plate and ink used: the non-printing areas of the plate are made up a layer of silicone that repels ink, specially formulated for this effect.
  • the temperature is an influencing parameter in the waterless offset. In because of the rise in this temperature due to the friction forces in the inking battery, the ink loses its viscosity and tends to cover the non-printing areas of the plate (fogging phenomenon).
  • the print quality obtained is therefore less good.
  • the results obtained with the invention show that it is possible to regulate the temperature of the inking battery 1 to a relatively high level weak contributing to obtain its homogeneous distribution in the rollers. It is as well as regulating the temperature of the inking battery between 25 and 35 ° C and preferably around 28 ° C.
  • the temperature of plate 2 is then maintained between 16 and 25 ° C. allowing a fairly high viscosity of the ink and avoiding the appearance of a fogging phenomenon during image formation.
  • the temperature at the blanket cylinder 5 and the blanket 4 itself is maintained between 28 and 35 ° C, preferably around 33 ° C, it is therefore higher than the temperature of the plate holder 3 and the plate 2 itself.
  • This temperature is optimized according to the ink rheology. It is generally between 33 and 35 ° C, sometimes at above. This reduces the viscosity of the ink and ensures homogenization of the ink film on the blanket 4, then on the paper, facilitating the splitting of the ink film during the second transfer of the image.
  • the plate thanks to the regulation of the cylinder which carries it is kept at a relatively low temperature while the blanket is at a higher temperature.
  • the blanket cylinder sometimes needs to be heated.
  • the blanket temperature is precisely defined according to the ink. It can be adapted to the rheology of each ink, in particular its viscosity which is directly linked to the fattening of the weft point.
  • the active regulation implemented according to the invention can be activated even before starting, the printing conditions are then optimized from the start and the quality obtained is constant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Methods (AREA)
EP02291570A 2001-06-22 2002-06-24 Vorrichtung und Verfahren zum Offsetdrucken Withdrawn EP1270219A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0108285A FR2826314B1 (fr) 2001-06-22 2001-06-22 Procede et dispositif d'impression offset
FR0108285 2001-06-22

Publications (1)

Publication Number Publication Date
EP1270219A1 true EP1270219A1 (de) 2003-01-02

Family

ID=8864678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02291570A Withdrawn EP1270219A1 (de) 2001-06-22 2002-06-24 Vorrichtung und Verfahren zum Offsetdrucken

Country Status (3)

Country Link
US (1) US20020195015A1 (de)
EP (1) EP1270219A1 (de)
FR (1) FR2826314B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005003836A1 (de) * 2005-01-27 2006-08-03 Koenig & Bauer Ag Vorrichtung zur Verminderung der Viskosität von Druckfarben auf Bedruckstoffen
EP2014464A1 (de) 2007-07-09 2009-01-14 Conception Diffusion de Matériel Arts Graphiques Druckvorrichtung mit Mitteln zur Farbmengenverstellung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8813088U1 (de) * 1988-10-18 1988-12-01 MAN Roland Druckmaschinen AG, 6050 Offenbach Druckwerk für eine Offsetrotationsdruckmaschine
DE9412965U1 (de) * 1993-10-14 1994-10-13 Baldwin-Gegenheimer Gmbh, 86165 Augsburg Druckmaschinen-Vorrichtung
EP0652104A1 (de) * 1993-11-05 1995-05-10 MAN Roland Druckmaschinen AG Druckwerk für wasserlosen Offsetdruck
US5694848A (en) * 1996-03-13 1997-12-09 Heidelberger Druckmaschinen Ag Printing unit for water based inks

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8813088U1 (de) * 1988-10-18 1988-12-01 MAN Roland Druckmaschinen AG, 6050 Offenbach Druckwerk für eine Offsetrotationsdruckmaschine
DE9412965U1 (de) * 1993-10-14 1994-10-13 Baldwin-Gegenheimer Gmbh, 86165 Augsburg Druckmaschinen-Vorrichtung
EP0652104A1 (de) * 1993-11-05 1995-05-10 MAN Roland Druckmaschinen AG Druckwerk für wasserlosen Offsetdruck
US5694848A (en) * 1996-03-13 1997-12-09 Heidelberger Druckmaschinen Ag Printing unit for water based inks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005003836A1 (de) * 2005-01-27 2006-08-03 Koenig & Bauer Ag Vorrichtung zur Verminderung der Viskosität von Druckfarben auf Bedruckstoffen
DE102005003836B4 (de) * 2005-01-27 2017-03-02 Koenig & Bauer Ag Vorrichtung zur Verminderung der Viskosität von Druckfarben beim Drucken
EP2014464A1 (de) 2007-07-09 2009-01-14 Conception Diffusion de Matériel Arts Graphiques Druckvorrichtung mit Mitteln zur Farbmengenverstellung
FR2918600A1 (fr) 2007-07-09 2009-01-16 Conception Diffusion De Materi Dispositif d'imprimerie comportant des moyens de variation de quantite d'encre.

Also Published As

Publication number Publication date
FR2826314B1 (fr) 2003-12-12
FR2826314A1 (fr) 2002-12-27
US20020195015A1 (en) 2002-12-26

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