EP0107121A2 - Cylindre porte-plaque pour une rotative offset comprenant un dispositif pour explorer zone par zone l'encrage de la plaque - Google Patents

Cylindre porte-plaque pour une rotative offset comprenant un dispositif pour explorer zone par zone l'encrage de la plaque Download PDF

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Publication number
EP0107121A2
EP0107121A2 EP83109933A EP83109933A EP0107121A2 EP 0107121 A2 EP0107121 A2 EP 0107121A2 EP 83109933 A EP83109933 A EP 83109933A EP 83109933 A EP83109933 A EP 83109933A EP 0107121 A2 EP0107121 A2 EP 0107121A2
Authority
EP
European Patent Office
Prior art keywords
zone
plate cylinder
color
cylinder
ink
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
EP83109933A
Other languages
German (de)
English (en)
Other versions
EP0107121A3 (en
EP0107121B1 (fr
Inventor
Hermann Fischer
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.)
Manroland AG
Original Assignee
MAN Roland 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
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0107121A2 publication Critical patent/EP0107121A2/fr
Publication of EP0107121A3 publication Critical patent/EP0107121A3/de
Application granted granted Critical
Publication of EP0107121B1 publication Critical patent/EP0107121B1/fr
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
    • B41F33/0027—Devices for scanning originals, printing formes or the like for determining or presetting the ink supply
    • 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
    • B41F13/10—Forme cylinders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/45—Sensor for ink or dampening fluid thickness or density
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/47—Automatic or remote control of metering blade position

Definitions

  • the invention relates to a plate cylinder for a rotary offset printing machine, to which a rubber cylinder can be adjusted, with a device for zone-wise scanning of the plate inking.
  • a plate cylinder of the type specified above is known from French patent specification 1,519,883.
  • the coloring in the individual color zones is determined with the help of a densitometric measuring device during the rotation of the plate cylinder over the entire circumference thereof.
  • the disadvantage of such a measurement of the color density in the individual ink zones is that they become contaminated over time due to their contact with the rubber cylinder, since paper dust is transferred from the printing medium to the plate cylinder via the rubber cylinder, which can lead to measurement errors.
  • FIG. 1 schematically shows in each case the part of a plate cylinder 1 and a rubber cylinder 2 comprising the pit.
  • a plate 3 is clamped on the plate cylinder 1 in a conventional manner, while the rubber cylinder 2 carries a rubber blanket 4.
  • a base 8 is usually used under the plate 3 and a base 9 under the rubber blanket 4.
  • the width of the channel 10 of the plate cylinder 1 is narrower in the circumferential direction than the pit 11 of the rubber cylinder.
  • a control strip or a measuring field 12 is preferably generated for each color zone Z in this area A during the manufacture of the plate 3, i.e. copied on.
  • the plate cylinder 1 is in constant contact with at least one inking roller or an ink cylinder (not shown), which continuously colors the plate 3.
  • the control bar designed in accordance with the invention in the form of measuring fields 12 assigned to the individual color zones Z is stepped by a densitometer 13 during machine operation, i.e. sequentially, sampled.
  • the densitometer comprises a radiation source 14 and a sensor 15 and is arranged on a threaded spindle 16 serving as a transport spindle.
  • the latter can be rotated by a defined amount by an electric motor, preferably by a stepping motor, so that the measuring head 13 is gradually moved from ink zone to ink zone, i.e. be moved from one measuring field 12 to the next measuring field.
  • an electric motor preferably by a stepping motor
  • the measuring head 13 is scanned in order to determine the color, i.e. the color density present in the respective zone Z
  • the measuring head 12 can be turned one step to the right, i.e. during the subsequent rotation of the plate cylinder 1, by activating the electric motor 17. be moved to the second color zone so that during the subsequent rotation of the plate cylinder 1 the measuring field 12 located in the second color zone Z can be scanned.
  • FIG. 2 shows a schematic representation of the arrangement of the plate cylinder 1 and the rubber cylinder 2 between two side walls 18, in which the threaded spindle 16 can also be mounted and the electric motor 17 can be flanged.
  • the values determined in the measuring head 13 reach a computer 20 via a line 19, which controls the electric motor 17 in a timely manner via a line 21 in order to move the measuring head 13 step by step in the manner described from left to right or vice versa.
  • the computer 20 controls color zone control elements 23 via a line 22, for example in the form of motorized color zones set screws.
  • a line 22 for example in the form of motorized color zones set screws.
  • the computer 20 ensures that the corresponding ink zone adjusting element 23 moves the ink knife 24 closer to the ink fountain roller 26 in this zone, thereby reducing the ink delivery and thereby the desired inking is achieved in this zone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
EP83109933A 1982-10-21 1983-10-05 Cylindre porte-plaque pour une rotative offset comprenant un dispositif pour explorer zone par zone l'encrage de la plaque Expired EP0107121B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3238912 1982-10-21
DE3238912A DE3238912C1 (de) 1982-10-21 1982-10-21 Vorrichtung zum zonenweisen Abtasten der Einfaerbung eines Plattenzylinders einer Rotations-Offsetdruckmaschine

Publications (3)

Publication Number Publication Date
EP0107121A2 true EP0107121A2 (fr) 1984-05-02
EP0107121A3 EP0107121A3 (en) 1985-12-11
EP0107121B1 EP0107121B1 (fr) 1988-12-07

Family

ID=6176205

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109933A Expired EP0107121B1 (fr) 1982-10-21 1983-10-05 Cylindre porte-plaque pour une rotative offset comprenant un dispositif pour explorer zone par zone l'encrage de la plaque

Country Status (4)

Country Link
US (1) US4530285A (fr)
EP (1) EP0107121B1 (fr)
JP (1) JPS5998850A (fr)
DE (2) DE3238912C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295606A3 (en) * 1987-05-26 1989-03-22 Dainippon Screen Mfg. Co., Ltd. An automatic ink feeding apparatus in an offset proof press machine

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE33548E (en) * 1983-03-30 1991-03-05 Mitsubishi Denki Kabushiki Kaisha Deviation correction apparatus for optical disc light beams
US4566089A (en) * 1983-03-30 1986-01-21 Mitsubishi Denki Kabushiki Kaisha Deviation correction apparatus for optical disc light beams
US5237923A (en) * 1988-08-19 1993-08-24 Presstek, Inc. Apparatus and method for imaging lithographic printing plates using spark discharges
US5235914A (en) * 1988-08-19 1993-08-17 Presstek, Inc. Apparatus and method for imaging lithographic printing plates using spark discharges
US5163368B1 (en) * 1988-08-19 1999-08-24 Presstek Inc Printing apparatus with image error correction and ink regulation control
DE3912811A1 (de) * 1989-04-19 1990-10-25 Heidelberger Druckmasch Ag Verfahren und vorrichtung fuer die feuchtmittelfuehrung einer offset-druckmaschine
CH679919A5 (fr) * 1989-10-23 1992-05-15 Patric Albiez
DE4125012A1 (de) * 1991-07-27 1993-01-28 Koenig & Bauer Ag Einrichtung zum befeuchten von zylindern bei offsetrotationsdruckmaschinen
FR2895310B1 (fr) * 2005-12-23 2009-04-17 Goss Int Montataire Sa Dispositif d'encrage et procede d'ajustement correspondant

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234871A (en) * 1963-09-17 1966-02-15 Robert E Ostwald Automatic liquid control and scanning device for duplicating machines
FR1519883A (fr) * 1967-02-24 1968-04-05 Etudes De Machines Speciales Dispositif de mesure de la répartition longitudinale du taux d'encrage d'un encrierd'une imprimeuse rotative
DE2011979A1 (de) * 1970-03-13 1972-04-13 Reinhard C Otto & Cie Verfahren und Vorrichtung zur Steuerung von Druckmaschinen
US3756725A (en) * 1970-10-12 1973-09-04 Harris Intertype Corp Measurement and control of ink density
DE2119758A1 (de) * 1971-04-22 1972-11-16 Fortuna-Werke Maschinenfabrik Ag, 7000 Stuttgart Offset-Druckmaschine
JPS4853804A (fr) * 1971-11-05 1973-07-28
US3916789A (en) * 1972-09-12 1975-11-04 Vickers Ltd Printing
US4440084A (en) * 1982-05-17 1984-04-03 Boris Pozin Method of adjustment of printing machine inking device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295606A3 (en) * 1987-05-26 1989-03-22 Dainippon Screen Mfg. Co., Ltd. An automatic ink feeding apparatus in an offset proof press machine

Also Published As

Publication number Publication date
JPH047303B2 (fr) 1992-02-10
US4530285A (en) 1985-07-23
EP0107121A3 (en) 1985-12-11
DE3238912C1 (de) 1984-03-15
EP0107121B1 (fr) 1988-12-07
JPS5998850A (ja) 1984-06-07
DE3378620D1 (en) 1989-01-12

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