Apparatus and method for making a reference exposure on a leadin

Details Apparatus and method for making a reference exposure on a leadin Apparatus and method for making a reference exposure on a leadin

1994-07-14

1995-09-19

Gellner, Michael L.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 40, 355 75, G03B 2752

Patent

active

054520550

ABSTRACT:
To locate a reference exposure on a non-perforated leading and/or trailing portion of a filmstrip in conformity with scene exposures associated with respective 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 leading or trailing portion is determined.

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