Apparatus for discriminating between a film notch and metering perforations in an automatic camera
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United States of America Patent
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Aug 19, 1997
Grant Date -
N/A
app pub date -
Mar 22, 1996
filing date -
Aug 29, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
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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