EP0116139B1 - Vorrichtung zur farbprofilabhängigen Feuchtmittelregelung an einem Farbwerk von Offsetdruckmaschinen - Google Patents

Vorrichtung zur farbprofilabhängigen Feuchtmittelregelung an einem Farbwerk von Offsetdruckmaschinen Download PDF

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Publication number
EP0116139B1
EP0116139B1 EP19830112129 EP83112129A EP0116139B1 EP 0116139 B1 EP0116139 B1 EP 0116139B1 EP 19830112129 EP19830112129 EP 19830112129 EP 83112129 A EP83112129 A EP 83112129A EP 0116139 B1 EP0116139 B1 EP 0116139B1
Authority
EP
European Patent Office
Prior art keywords
roller
measuring
inking
dampening
section
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.)
Expired
Application number
EP19830112129
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0116139A1 (de
Inventor
Willi Jeschke
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger 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
Priority claimed from DE19823247761 external-priority patent/DE3247761C2/de
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0116139A1 publication Critical patent/EP0116139A1/de
Application granted granted Critical
Publication of EP0116139B1 publication Critical patent/EP0116139B1/de
Expired 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

Definitions

  • the invention relates to a device for color profile-dependent dampening solution control on a ink dampening system of offset printing presses.
  • a device for color profile-dependent dampening solution control on a ink dampening system of offset printing presses is known from the earlier application (Art. 54 (3)) EP-A-0 095 652.
  • each inking roller is also a water-carrying roller and the amount of water depends on the geometry of the inking unit, i.e. the position of the individual inking rollers, on the subject and on the local temperature conditions, it was determined that at the inlet of the plate in the area of the dampening unit the proportion of dampening solution in the ink layer is particularly high.
  • the object is achieved by the inventive features of the characterizing part of claim 1.
  • This has the advantage that an excessive amount of dampening solution can be determined separately for each zone and this is removed in a simple manner.
  • This solution is based on the knowledge that an increase in temperature on the surface of a hydrophilic measuring roller causes a higher evaporation of the dampening solution and thus a reduction in the proportion of dampening solution in the ink.
  • the subclaims contain advantageous further developments and enable sensitive adjustment and control of the various influences, such as heat and subject. Color etc.
  • the inking unit according to Figure 1 consists of a hydrophilic measuring roller, for. B. from a chrome or aluminum roller 1, which is partially inside a housing 2.
  • sensors 3 are assigned to the measuring roller 1, which extend over the entire length thereof. In this way, the behavior of the ink and the dampening solution is precisely recorded in all areas.
  • a heat source 4 is provided parallel to the measuring roller 1 in order to generate the desired temperature changes on the measuring roller 1.
  • the heat source 4 is connected to the housing 2 via a bracket 11.
  • the measuring roller 1 is in contact with the friction roller 6 via the inking roller 5.
  • This friction roller 6 also has contact with the two inking rollers 7 and 8, which in turn roll on the plate cylinder 12.
  • the sensors 3 and the heat source 4 are coupled to a controller 10 and a temperature control device 9. Due to the signal recording of the sensors 3, the pulse-shaped radiation of the heat source 4 is regulated by the temperature control device 9 via the controller 10.
  • the individual sensors 3 detect the proportion of the dampening medium in the color and thus the toning, which in turn is used to regulate the zone-by-zone heat influence.
  • the measuring roller 1 can be assigned to each rubber ink roller, but is advantageously provided in the area of the last inking roller 8.
  • FIG. 3 of a printing unit known per se shows the rubber cylinder 13 which is provided between the plate cylinder 12 and the printing cylinder 14.
  • the dampening unit 15, as seen in the direction of rotation of the plate cylinder 12, is arranged in front of the inking unit 16.
  • the measuring roller 1, which is assigned to the rubber ink roller 5 in the exemplary embodiment shown, could, for. B. also assign the rubber ink rollers 17 or 18.
  • the idealized behavior of the dampening solution on the measuring roller 1 is shown in FIG.
  • the on-time of the heat source 4 is changed zone by zone, according to the measurement results of the sensors 3. After the measuring roller 1 is always somewhat warmer than the plate cylinder 12, it also occurs earlier Tone.
  • the variables “time” are plotted on the abscissa and the states “m ” for radiators “on” and “n” for radiators “off ” are plotted on the abscissa.
  • Two states are recorded in area A, in which there is too little water in the individual zones on the measuring roller 1.
  • the heat source 4 is either not switched on at all or only for a short time
  • the three states shown here also differ in the operating time of the heat source 4, which can differ from zone to zone.
  • area C there is too much dampening water on the chrome roller 1, so that the switch-on time of the heat sources 4 is considerably extended.
  • the dampening solution supply is additionally reduced overall, in order to return the condition on the chrome roller 1 back to the region B. B. when processing special printing inks, also control superordinate and thus influence.
  • the supply of heat can also be regulated by varying the intensity of the radiation by modulating the frequency or the pulse width. It would be e.g. B. also conceivable to effect zone-by-zone cooling to maintain the ink / fountain solution balance. There would also be the possibility of installing this device at a different location in the inking unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
EP19830112129 1982-12-23 1983-12-02 Vorrichtung zur farbprofilabhängigen Feuchtmittelregelung an einem Farbwerk von Offsetdruckmaschinen Expired EP0116139B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823247761 DE3247761C2 (de) 1982-06-02 1982-12-23 Vorrichtung zur Feuchtmittelführung bei einem Offsetdruckwerk
DE3247761 1982-12-23

Publications (2)

Publication Number Publication Date
EP0116139A1 EP0116139A1 (de) 1984-08-22
EP0116139B1 true EP0116139B1 (de) 1986-06-18

Family

ID=6181600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830112129 Expired EP0116139B1 (de) 1982-12-23 1983-12-02 Vorrichtung zur farbprofilabhängigen Feuchtmittelregelung an einem Farbwerk von Offsetdruckmaschinen

Country Status (4)

Country Link
EP (1) EP0116139B1 (enrdf_load_stackoverflow)
JP (1) JPS59120459A (enrdf_load_stackoverflow)
DK (1) DK564783A (enrdf_load_stackoverflow)
ES (1) ES527317A0 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4864925A (en) * 1987-09-28 1989-09-12 Rockwell International Corporation Simplified lithography using ink and water admixtures
DE4244500A1 (de) * 1992-12-30 1994-07-07 Heidelberger Druckmasch Ag Verfahren zum Zuführen von Feuchtmittel
AU3362499A (en) * 1998-03-23 1999-10-18 Goss Graphic Systems, Inc. Method and apparatus for controlling a dampener of a lithographic printing press
DE102013009466A1 (de) * 2012-07-04 2014-01-09 Heidelberger Druckmaschinen Ag Steuerungsverfahren zur Dosierung der Feuchtmittelmenge
CN103358663B (zh) * 2013-07-09 2015-03-11 上海光华印刷机械有限公司 一种印刷机的水墨系统的排列结构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2214721B1 (de) * 1972-03-25 1973-06-14 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Verfahren und vorrichtung zum selbsttaetigen ausregeln von schwankungen der farb- und feuchtfluessigkeitsfuehrung an offsetmaschinen
DE2736663C3 (de) * 1977-08-13 1985-05-15 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Vorrichtung zur Ermittlung des Feucht- und Farbgleichgewichts bei Offsetdruckwerken
DE2931579C2 (de) * 1979-08-03 1982-11-11 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Einrichtung zur zonalen Regulierung der Feuchtmittelführung

Also Published As

Publication number Publication date
ES8406297A1 (es) 1984-08-01
DK564783A (da) 1984-06-24
ES527317A0 (es) 1984-08-01
JPH0376671B2 (enrdf_load_stackoverflow) 1991-12-06
DK564783D0 (da) 1983-12-08
EP0116139A1 (de) 1984-08-22
JPS59120459A (ja) 1984-07-12

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