EP 0408958 A3 19910626 - METHOD AND DEVICE FOR MEASURING THE WEB DEVIATION IN A POLYCHROMATIC ROTARY PRINTING MACHINE
Title (en)
METHOD AND DEVICE FOR MEASURING THE WEB DEVIATION IN A POLYCHROMATIC ROTARY PRINTING MACHINE
Publication
Application
Priority
CH 264989 A 19890715
Abstract (en)
[origin: EP0408958A2] Method for measuring the web (110) deviation in a polychromatic rotary printing machine, using a mark printed at the time of each colour, this mark passing under photoelectric detectors in order to generate signals the result of whose combination represents the lateral deviation. The method consists: - in disposing above the web (110) two laterally adjacent photoelectric detectors (130/135), their common edge being located over the expected passage of the centre of a laterally symmetrical mark (120), - in deriving the lateral deviation of the web (110) from the difference between the variations in intensity (d1, d2) of the signals (a1, a2) seen by each of the two photoelectric detectors (130/135) during the passage of the mark (120). <IMAGE>
IPC 1-7
IPC 8 full level
B41F 33/14 (2006.01); B65H 23/02 (2006.01)
CPC (source: EP US)
B65H 23/0216 (2013.01 - EP US)
Citation (search report)
- [X] EP 0289206 A1 19881102 - CROSFIELD ELECTRONICS LTD [GB]
- [Y] EP 0317418 A2 19890524 - BRUNET JEAN
Designated contracting state (EPC)
AT BE DE DK ES FR GB IT LU NL SE
DOCDB simple family (publication)
EP 0408958 A2 19910123; EP 0408958 A3 19910626; AU 5975990 A 19910117; BR 9003338 A 19910827; CA 2021163 A1 19910116; CH 680117 A5 19920630; JP H0353941 A 19910307; US 5126578 A 19920630
DOCDB simple family (application)
EP 90112527 A 19900630; AU 5975990 A 19900724; BR 9003338 A 19900712; CA 2021163 A 19900713; CH 264989 A 19890715; JP 18781790 A 19900716; US 55212990 A 19900713