Apparatus for detecting marks on a running web

Details Apparatus for detecting marks on a running web Apparatus for detecting marks on a running web

1983-07-19

1986-07-15

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250557, G01N 2186, G05B 1929

Patent

active

046008411

ABSTRACT:
Mark detector for detecting marks on a running web distinguished from any printed letter or pattern or any printing smudge. The width of mark segments and the distance between them are determined and, if they are within preset ranges, a mark detection signal is given. A delayed signal generator and a false signal generator are provided.

REFERENCES:
patent: 4067760 (1978-01-01), Nelson
patent: 4243925 (1981-01-01), Gnuechtel

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