EP0876910A1 - Procédé de traitement d'une solution de mouillage pour l'impression offset - Google Patents

Procédé de traitement d'une solution de mouillage pour l'impression offset Download PDF

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Publication number
EP0876910A1
EP0876910A1 EP98810354A EP98810354A EP0876910A1 EP 0876910 A1 EP0876910 A1 EP 0876910A1 EP 98810354 A EP98810354 A EP 98810354A EP 98810354 A EP98810354 A EP 98810354A EP 0876910 A1 EP0876910 A1 EP 0876910A1
Authority
EP
European Patent Office
Prior art keywords
fountain solution
solution tank
air
tubes
air supply
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Withdrawn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
EP98810354A
Other languages
German (de)
English (en)
Inventor
Thomas Hug
Daniel Ruprecht
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.)
Zollikofer AG
Ruprecht Handels AG
Original Assignee
Zollikofer AG
Ruprecht Handels 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 Zollikofer AG, Ruprecht Handels AG filed Critical Zollikofer AG
Priority to EP98810354A priority Critical patent/EP0876910A1/fr
Publication of EP0876910A1 publication Critical patent/EP0876910A1/fr
Withdrawn legal-status Critical Current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
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • 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
    • B41F7/32—Ducts, containers, or like supply devices for liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces

Definitions

  • the present invention relates to a method for processing fountain solutions for offset printing and further relates to a device for implementing the method.
  • Offset sheet printing machines include, in addition to the different cylinders, an inking unit and a damping unit, whereby the damping unit is situated ahead of the inking unit and designed to damp the not printing parts of the offset plate mounted onto the plate cylinder before the inking. More precisely said, offset printing is based on the principle of the reciprocal repulsion between oliophilic, that means ink containing, and hydrophilic, that means water containing solutions on the offset plate.
  • the water generally used in the damping unit is normal city supply water or, if that water is hard, softened water.
  • a fountain solution concentrate which includes different substances that stabilize the pH value, influence the surface tension, provide the offset plate with a plate protection and have antimicrobacterial properties.
  • Such fountain solution concentrates are commercialized under different trade names and with different compositions.
  • the fountain solution tank is provided with a oxygen supply unit, particularly an air supply unit.
  • Figure 1 schematically shows one of possibly several printing groups of an offset sheet printing machine with a plate cylinder 1, an impression cylinder 2 and a rubber blanket cylinder 3 arranged in-between, as well as the inking unit 4 with its different inking drums that transfer the ink onto the plate cylinder, and the damping unit 5.
  • the paper sheet 6 proceeds from the intermediate drum 7 to a first feeder drum 8 from where it proceeds to the impression cylinder 2 and continues to the second feeder drum 9 from where the sheet may proceed to a further drum and, if provided for, to a further inking unit or to a coating module.
  • the damping unit 5 includes a scoop roller 10 that scoops water from a fountain solution tank 11 at a given rotational speed, and a metering roller 12 that regulates the water quantity, and finally a damping roller 13 that humidifies the offset printing plate 14 with a regular film of damp.
  • the method according to the invention is based on the finding that by adding oxygen or surrounding air respectively to the water, the viscosity of the water increases. That means that a similar effect is obtained as by using isopropyl alcohol, without, however, the necessity to provide such a substance and without loading the environment with vaporized organic substances. It is useful to use compressed air that is available in most printing offices.
  • the section of Figure 3 shows the fountain solution tank 11 with its rear wall cut away and the water conduit 24 with the holes 25.
  • the scoop roller 10 is shown in dotted lines.
  • the air supply unit 15 is mainly formed of a linkage of bars 16, to which compressed air is supplied by a hose 17, as well as from a certain number of dipping tubes 18 - in the shown embodiment nine - connected to the linkage of bars 16.
  • the whole air supply unit is mounted onto the rear wall 20 of the tank 11 by means of a certain number of clamps 19, see also Figure 2, and can be removed easily for cleaning purposes, whereby between the hose 17 and the linkage of bars 16 a plug-type connection 21 is provided.
  • Each dipping tube is provided with a nozzle 22 to achieve that the air is blown in finest particles into the fountain solution. Moreover, it is advantageous to provide for a metering valve 23 at each connection between dipping tube and linkage bar to allow an individual metering of the air volume for each dipping tube.
  • the elements of the air providing unit are preferably made of metal. While appropriate metal is resistant to the components of the fountain solution it may be desirable to use also elements made of plastics.
  • the embodiment and its variants according to Figures 4 to 8 comprise for example two plastics tubes 26 and 27 provided with small holes 28.
  • the tubes are arranged lengthwise and approximately parallel to the water conduit 24.
  • the air conducting tubes are connected to a hose 17 supplying compressed air.
  • the tubes are connected by a similar or the same plug-type connection 21 as in the previous embodiment.
  • the tubes 26 and 27 are one above the other, and for maintaining the tubes in place between the tank wall 20 and the water conduit 24 a sheet metal or plastic foil 29 is provided, the foil being clamped to or suspended on the top of the wall 20 of tank 11.
  • the two tubes 26 and 27 are arranged on the other side of the water conduit 24 and the sheet metal or plastic foil 30 has is provided with a step 31 at its bottom part.
  • the two tubes are not on top of the other but on both sides of the water conduit 24, also held in place by the stepped sheet metal or plastic foil 30.
  • the air is provided by a plastics cushion 32, the cushion covering a major part of the bottom of the tank, across preferably between the water conduit 24 and a rib 35, and along the lengthside of the tank.
  • the cushion 32 is provided with openings 33 at its top surface 34.
  • the cushion is connected in a similar way to hose 17 as the tubes.
  • connection to the compressed-air hose of the tubes as well as of the cushion may comprise a metering valve 36.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
EP98810354A 1997-05-01 1998-04-22 Procédé de traitement d'une solution de mouillage pour l'impression offset Withdrawn EP0876910A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98810354A EP0876910A1 (fr) 1997-05-01 1998-04-22 Procédé de traitement d'une solution de mouillage pour l'impression offset

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP97810275 1997-05-01
EP97810275 1997-05-01
EP98810354A EP0876910A1 (fr) 1997-05-01 1998-04-22 Procédé de traitement d'une solution de mouillage pour l'impression offset

Publications (1)

Publication Number Publication Date
EP0876910A1 true EP0876910A1 (fr) 1998-11-11

Family

ID=26148020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810354A Withdrawn EP0876910A1 (fr) 1997-05-01 1998-04-22 Procédé de traitement d'une solution de mouillage pour l'impression offset

Country Status (1)

Country Link
EP (1) EP0876910A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10222294A1 (de) * 2002-05-18 2003-12-04 Koenig & Bauer Ag Feuchtwerk mit Feuchtmittelzufuhr- und Rücklaufeinrichtung
WO2020203013A1 (fr) * 2019-03-29 2020-10-08 東レ株式会社 Procédé de production d'imprimés

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3443510A1 (de) * 1984-11-29 1986-06-05 Weitmann & Konrad GmbH & Co KG, 7022 Leinfelden-Echterdingen Vorrichtung zur uebertragung von fluessigkeit
JPH01136746A (ja) * 1987-11-25 1989-05-30 Toppan Printing Co Ltd オフセット印刷工程における湿し水のｉｐａ管理装置
WO1995003177A1 (fr) * 1993-07-21 1995-02-02 Arturo Guerini Procede et dispositif pour traiter le liquide de lavage des presses typographiques et en particulier des presses typographiques offset

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3443510A1 (de) * 1984-11-29 1986-06-05 Weitmann & Konrad GmbH & Co KG, 7022 Leinfelden-Echterdingen Vorrichtung zur uebertragung von fluessigkeit
JPH01136746A (ja) * 1987-11-25 1989-05-30 Toppan Printing Co Ltd オフセット印刷工程における湿し水のｉｐａ管理装置
WO1995003177A1 (fr) * 1993-07-21 1995-02-02 Arturo Guerini Procede et dispositif pour traiter le liquide de lavage des presses typographiques et en particulier des presses typographiques offset

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 385 (M - 864) 25 August 1989 (1989-08-25) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10222294A1 (de) * 2002-05-18 2003-12-04 Koenig & Bauer Ag Feuchtwerk mit Feuchtmittelzufuhr- und Rücklaufeinrichtung
US7237481B2 (en) 2002-05-18 2007-07-03 Koenig & Bauer Aktiengesellschaft Dampening systems having a dampening agent feeding and return device
WO2020203013A1 (fr) * 2019-03-29 2020-10-08 東レ株式会社 Procédé de production d'imprimés
JPWO2020203013A1 (fr) * 2019-03-29 2020-10-08
CN113557144A (zh) * 2019-03-29 2021-10-26 东丽株式会社 印刷物的制造方法
JP7040609B2 (ja) 2019-03-29 2022-03-23 東レ株式会社 印刷物の製造方法
CN113557144B (zh) * 2019-03-29 2022-11-01 东丽株式会社 印刷物的制造方法

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