Apparatus for discriminating between a film notch and metering p

Details Apparatus for discriminating between a film notch and metering p Apparatus for discriminating between a film notch and metering p

1996-03-22

1997-08-19

Metjahic, Safet

Photography

With film drive

Double exposure prevention

396395, 396406, 396408, G03B 118, G03B 100, G03B 700

Patent

active

056598300

ABSTRACT:
Apparatus for use in an automatic film winding camera for determining, during film loading, the presence of a film leader portion having a notch therein. First and second film perforation sensors positioned apart along a film advancing path of the film in first and second sensor positions are enabled and disabled in a sequence in which the first and second sensors successively detect the advancement of the film's leading edge at the first and the second sensor positions. The first sensor is then enabled for sensing the film perforations when the notch in the film leader portion is positioned between the first and second sensor positions.

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