Detecting apparatus for finding a reference exposure made on a l

Details Detecting apparatus for finding a reference exposure made on a l Detecting apparatus for finding a reference exposure made on a l

1995-04-21

1996-09-03

Mathews, A. A.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

25055902, 25055944, G03B 2752

Patent

active

055528554

ABSTRACT:
To find a reference exposure located on a non-perforated leading and/or trailing portion of a filmstrip in conformity with picture-taking exposures made on the filmstrip between successive pairs of evenly spaced exposure-locating perforations in the filmstrip, a pair of perforation sensors are spaced apart a distance which is the same as the pitch of the exposure-locating perforations. When one of the two sensors detects an exposure-locating perforation and the other does not, the reference exposure made on the leading or trailing portion is found.

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