Camera with film sensor to determine when to close cassette not

Details Camera with film sensor to determine when to close cassette not Camera with film sensor to determine when to close cassette not

1999-02-03

2000-01-11

Gray, David M.

Photography

With film drive

Mechanical detail

396513, G03B 1724

Patent

active

060128577

ABSTRACT:
A camera comprising a chamber for a film cassette having a film spool inside the cassette that is windingly rotated to progressively wind an exposed filmstrip into the cassette and a light lock that is to be closed after the exposed filmstrip is completely wound into the cassette, a rotatable film winder for windingly rotating the film spool, a film sensor urged against the exposed filmstrip before the exposed filmstrip is completely wound into the cassette to sense the presence of the exposed filmstrip, and a closing mechanism movable to close the light lock when the exposed filmstrip is completely wound into the cassette, is characterized in that the film winder has an urging component that urges the film sensor against the exposed filmstrip only when the film winder is rotated, whereby the film sensor is not urged against the exposed filmstrip when the film winder is stationary. Thus, the film sensor will not distort the filmstrip during exposure.

REFERENCES:
patent: 5550608 (1996-08-01), Smart et al.
patent: 5555063 (1996-09-01), Balling
patent: 5579070 (1996-11-01), Smart et al.
patent: 5600395 (1997-02-01), Balling et al.
patent: 5602609 (1997-02-01), Balling
patent: 5608480 (1997-03-01), Smart et al.
patent: 5614976 (1997-03-01), Smart et al.
patent: 5617169 (1997-04-01), Takaba et al.
patent: 5629750 (1997-05-01), Smart et al.
patent: 5708854 (1998-01-01), Smart et al.
patent: 5727247 (1998-03-01), Smart et al.
patent: 5748989 (1998-05-01), Sangregory et al.
patent: 5748990 (1998-05-01), Smart et al.

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