Patent
1991-11-04
1993-04-06
Gellner, Michael L.
354277, G03B 718
Patent
active
052007774
ABSTRACT:
In a film cassette, a light blocking device is supported for movement to a light blocking position for preventing ambient light from entering a cassette shell and to a non-blocking position, and a separate cassette element such as a film spool is supported for movement to use the film cassette. According to the invention, locking apparatus for normally engaging the cassette element to prevent movement of the cassette element is coupled with the light blocking device for movement, when the light blocking device is moved to its non-blocking position, to a non-locking position disengaged from the cassette element to allow movement of the cassette element. Thus, the film cassette cannot be used unless the light blocking device is in its non-blocking position.
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Eastman Kodak Company
Fields Roger A.
Gellner Michael L.
Tuccillo Nicholas J.
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