EP 0324718 B1 19920708 - METHOD AND DEVICE FOR INK MONITORING IN A PRINTING MACHINE
Title (en)
METHOD AND DEVICE FOR INK MONITORING IN A PRINTING MACHINE
Publication
Application
Priority
- CH 12088 A 19880114
- CH 126888 A 19880406
Abstract (en)
[origin: EP0324718A1] During sheet printing, a three-colour offset printing machine produces colour measurement bars with a plurality colour measurement fields. A grey screen field (52) produced by the superimposition of three colours serves as the reference field, the colour location of which is compared in a colour separation computer (68) with the colour location of an associated nominal reference field (51). From the colour separation, a layer thickness modification computer (71) calculates a layer thickness modification control vector with the aid of a sensitivity matrix (74) calculated by a matrix computer (73) on the basis of a linear model. In addition, the matrix computer (73) evaluates a series of adjacent fields which comprise three single- colour screen fields, three single-colour full tone fields, three two- colour full tone fields and one three-colour full tone field. <IMAGE>
IPC 1-7
IPC 8 full level
B41F 31/02 (2006.01); B41F 33/00 (2006.01); B41F 33/14 (2006.01); B41M 1/14 (2006.01)
CPC (source: EP US)
B41F 33/0036 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE ES FR GB IT LI SE
DOCDB simple family (publication)
EP 0324718 A1 19890719; EP 0324718 B1 19920708; CA 1326707 C 19940201; CN 1008989 B 19900801; CN 1034166 A 19890726; DE 58901780 D1 19920813; ES 2033128 T3 19930301; JP 2782217 B2 19980730; JP H01225554 A 19890908; US 4975862 A 19901204
DOCDB simple family (application)
EP 89810006 A 19890105; CA 588035 A 19890112; CN 89100150 A 19890114; DE 58901780 T 19890105; ES 89810006 T 19890105; JP 759589 A 19890114; US 29352889 A 19890105