Photocopying – Projection printing and copying cameras – Identifying – composing – or selecting
Patent
1983-10-07
1987-03-17
Yasich, Daniel M.
Photocopying
Projection printing and copying cameras
Identifying, composing, or selecting
226 45, 242 672, 328 5, 361181, G03C 1102, G08B 108
Patent
active
046503145
ABSTRACT:
A film or photo print inspection machine having a print-advancing drive means to run a strip or web of photo prints from at least one supply reel to a corresponding collecting reel, over a viewing surface, is provided with a presence switch means activated by a capacitance reactive sensor or sensing antenna, the antenna being comprised of a metal plate mounted on the rear of the viewing surface such that introduction of an operating technician's hand, or other impedance, into a sensing region established by the antenna, in order to mark a defective photographic print, will activate the presence switch means to turn off the print-advancing drive means. Print advancement resumes when the technician's hand, or other object, is withdrawn from the antenna sensing region.
REFERENCES:
patent: 2312835 (1943-03-01), Hansell
patent: 2896196 (1959-07-01), Hartford et al.
patent: 2919624 (1960-01-01), Lindeman
patent: 3532990 (1970-10-01), Kasper
patent: 3725808 (1973-04-01), Oushige et al.
patent: 3970911 (1976-07-01), Schmall
patent: 4175239 (1979-11-01), Sandler
patent: 4400758 (1983-08-01), Frame
"Sourcebook of Electric Circuits", McGraw-Hill Book Co., 1968 (John Markus) pp. 67, 68.
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