Web registration control system

Details Web registration control system Web registration control system

B - Operations, Transporting

41

F

101/37, 271/54,

B41F 5/06 (2006.01) B41F 13/12 (2006.01) B41F 33/00 (2006.01)

Patent

CA 1322291

ABSTRACT OF THE DISCLOSURE A system for generating indicia of registration error between the respective printing units of a web-fed, four-color printing press. An optical line scanner is disposed over a web to generate signals indicative of the brightness level of successive nominal pixels along a line transverse to the motion of the web. The respective printing units each generate registration marks on the web, the rela- tive positions of which are indicative of the relative cyclical (rotational) and transverse (lateral) positions of the printing units with respect to the web. As the web moves past the scanners, successive line scans generated by the scanner provide the equivalent of a two-dimensional raster scan of a strip of the web centered on the expected center line of registration marks produced by the respective print- ing units. The centers of the respective registration marks are determined, and the cyclical (rotational) and transverse (lateral) positions of the printing unit adjusted, in accord- ance with deviations from expected relative positions. The use of symmetrical marks and, in particular, right-angled diamonds, is disclosed for facilitating calculation of the center of the marks.

533739

Affiliated with

Also associated with

Rating

Web registration control system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Web registration control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Web registration control system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1338451