EP 0196431 B1 19921111 - METHOD, CONTROL DEVICE AND AUXILIARY MEANS FOR OBTAINING UNIFORM PRINTING RESULTS FROM A MULTICOLOUR HALF-TONE OFFSET PRINTING MACHINE
Title (en)
METHOD, CONTROL DEVICE AND AUXILIARY MEANS FOR OBTAINING UNIFORM PRINTING RESULTS FROM A MULTICOLOUR HALF-TONE OFFSET PRINTING MACHINE
Publication
Application
Priority
- DE 3510172 A 19850321
- DE 3543444 A 19851209
- DE 3604222 A 19860211
Abstract (en)
[origin: US4852485A] The invention relates to a method, a control apparatus and aids for the achievement of a uniform printing result on an autotypically operating multicolor printing press. In addition to solid densities and/or screen dot sizes, selected relationships between solid densities and/or screen dot sizes of different printing colors are determined at measuring patches simultaneously printed within the color zones. If they fall outside of the tolerances associated with them, a corrective intervention is made in the printing process by actuating the regulators of the inking units. For the control of the inking units, the first aid provided, instead of the conventional single color meausring patches, is combination measuring patches which are formed by the overprinting of single color measuring patches. Since the measurement data obtained at combination measuring patches do not agree with the data obtained at single color measuring patches, they are corrected accordingly prior to being processed to control signals for the regulators in the printing units. A second aid consists of a device for determining the color balance in the printing result.
IPC 1-7
IPC 8 full level
B41F 31/04 (2006.01); B41F 33/00 (2006.01)
CPC (source: EP US)
B41F 33/0045 (2013.01 - EP US); B41P 2233/51 (2013.01 - EP US); Y10S 101/45 (2013.01 - EP US)
Citation (examination)
- Graphic Communications Association, GCA Spectrum News 12/84 S.3.
- Graphic Communication Association GCA Newsletter 4/85 S.4.
- Cromalin Offset Com Guide / System Brunner 1984 Du Pont de Nemours Co. Inc. Wilmington, DE, USA und System Brunner S.A., S.23.
Designated contracting state (EPC)
CH DE FR GB LI NL
DOCDB simple family (publication)
EP 0196431 A2 19861008; EP 0196431 A3 19880720; EP 0196431 B1 19921111; DE 3687074 D1 19921217; US 4852485 A 19890801
DOCDB simple family (application)
EP 86101892 A 19860214; DE 3687074 T 19860214; US 84194786 A 19860320