G - Physics – 05 – D
Patent
G - Physics
05
D
341/41
G05D 13/62 (2006.01) B31F 1/00 (2006.01) B41F 19/02 (2006.01) B41F 33/02 (2006.01) B44C 1/20 (2006.01) D06C 23/04 (2006.01)
Patent
CA 1056482
PRINTED PATTERN AND EMBOSSED PATTERN REGISTRATION CONTROL SYSTEM Abstract of the Disclosure A system is disclosed for securing registration of a patterned embossing roll with a similarly patterned printed moving web. The pur- pose of the embossing roll is to indent the surface of the printed web in register with the printing in certain designated areas. In one embodiment, a series of randomly spaced register marks on the printed web selvage edge and identically spaced register marks on the embossing roll are viewed by appropriate scanners. Electrical signatures repre- senting the two sets of register marks are generated by the sensors and red to a signal correlator for comparison. The correlator determines the degree of statistical error between the two signatures and displays this error in the form of a time delay on a CRT (Cathode Ray Tube). If manual registration control is desired, an operator can manually adjust the speed or phase of the embossing roll by observing the peaked wave display on the CRT to bring the roll into a statistical best fit of the embossing pattern with the printed pattern. Automatic control of embossing roll speed and orientation to achieve registration is also possible if the correlator is interfaced with a digital computer and servo correc- tion motors on the embosser drive system. The disclosed system is an improvement over conventional benchmark oriented registration sensing and control systems in that it is capable of continuous error determin- ations and asynchronous error corrections on demand rather than period- ically at the end of pattern length intervals.
232709
Horst Robert L.
Ringer Richard M.
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