EP 0401691 A2 19901212 - Method and device for detecting registration marks in a multicolour printing press.
Title (en)
Method and device for detecting registration marks in a multicolour printing press.
Title (de)
Vorrichtung und Verfahren zum Detektieren von Registermarken in einer Mehrfarbendruckpresse.
Title (fr)
Procédé et dispositif de détection des marques de réperage de l'impression dans une presse à imprimer à plusieurs couleurs.
Publication
Application
Priority
CH 218189 A 19890608
Abstract (en)
The method involves detecting a printed registration mark (1) composed of signs (3a to 3e) and of colour printing flags (4a, 4c), comparing the image of the signs (3a to 3e) of the printed registration mark (1) with the signs of a virtual reference registration mark, then subsequently defining a base area (5a to 5c) for each sign (3a to 3e), calculating the geometrical centres (6a to 6c) of each base area (5a to 5c), detecting a colour printing flag (4a to 4c) in these base areas, calculating and storing their geometrical centre (7a to 7c), measuring the position deviations ( DELTA x to DELTA x<2> and DELTA y to DELTA y<2>) between the geometrical centres (6a to 6c) of the base areas (5a to 5c) and the geometrical centres (7a to 7c) of the colour printing flags (4a to 4c), and finally using these results in order to control the member for correcting the registration errors of a printing press. <??>The method is used in the sector of the control of the registration of colours in multicolour printing presses. <IMAGE>
IPC 1-7
IPC 8 full level
G03F 9/00 (2006.01); B41F 33/00 (2006.01); B41F 33/14 (2006.01)
CPC (source: EP US)
B41F 33/0081 (2013.01 - EP US); B41P 2233/52 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE DK ES FR GB IT LU NL SE
DOCDB simple family (publication)
EP 0401691 A2 19901212; EP 0401691 A3 19910724; EP 0401691 B1 19940316; AT E102871 T1 19940415; AU 5689390 A 19901213; AU 634241 B2 19930218; BR 9002694 A 19910820; CA 2018449 A1 19901208; CA 2018449 C 19940329; CH 679990 A5 19920529; DE 69007339 D1 19940421; DE 69007339 T2 19940623; DK 0401691 T3 19940808; ES 2050879 T3 19940601; JP H03184052 A 19910812; US 5138667 A 19920811
DOCDB simple family (application)
EP 90110405 A 19900601; AT 90110405 T 19900601; AU 5689390 A 19900607; BR 9002694 A 19900607; CA 2018449 A 19900607; CH 218189 A 19890608; DE 69007339 T 19900601; DK 90110405 T 19900601; ES 90110405 T 19900601; JP 15143390 A 19900608; US 53503190 A 19900608