Method and an arrangement for the detection by photoelectric mea

Details Method and an arrangement for the detection by photoelectric mea Method and an arrangement for the detection by photoelectric mea

1984-07-06

1987-10-06

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

235456, 250548, B65H 2524

Patent

active

046985140

ABSTRACT:
A method and an arrangement is disclosed for the detection by photoelectric means of markings made on a printed, decorated material web. The markings comprise two groups of stroke markings, the markings of a first group being arranged to be sensed by a first photocell element, which, on sensing the first group markings causes the output of a second photocell element, which senses the stroke markings of a second group of making to be fed into a memory unit for continuous comparison with a stored value. In response to the comparison, a control signal is generated to control the performance of various operations on the web.

REFERENCES:
patent: 3562494 (1971-02-01), Schmidt
patent: 3783293 (1974-01-01), Gold et al.
patent: 3796862 (1974-03-01), Asija
patent: 3922539 (1975-11-01), Carnes et al.
patent: 4515481 (1985-05-01), Yamada et al.
patent: 4600841 (1986-07-01), Tokuno et al.

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