Optics: motion pictures – Removable film strip magazine type
Patent
1989-07-14
1990-06-12
Brown, Brian W.
Optics: motion pictures
Removable film strip magazine type
352229, 352230, G03B 1200
Patent
active
049336932
ABSTRACT:
A camera is adapted for use with a film cassette in which a film spool is rotatable to unwind a filmstrip off the spool to automatically thrust a non-protruding leader portion of the filmstrip from the cassette to enable the leader portion to be propelled in the camera over an exposure opening and to a film take-up means. The filmstrip including the leader portion has a natural tendency to curve crosswise. In the camera, a pressure plate is resiliently biased to an operative position for pressing the filmstrip flat at the exposure opening. A restraining device is operated to hold the pressure plate in a retracted position sufficiently removed from the exposure opening. This permits the filmstrip to assume its natural cross-curvature in order to significantly increase the longitudinal strength of the leader portion to facilitate its being propelled over the exposure opening and to the film take-up means responsive to unwinding rotation of the film spool. When the filmstrip is taken up at the take-up means, the restraining device releases the pressure plate for movement to its operative position.
REFERENCES:
patent: 2336279 (1943-12-01), Michalyi
patent: 2753777 (1956-07-01), Faulhaber et al.
patent: 2949831 (1960-08-01), Bretthauer
patent: 3110237 (1963-11-01), Scholkemeier et al.
patent: 3563144 (1971-02-01), Fukimo
patent: 4423943 (1984-01-01), Gold
patent: 4505562 (1985-03-01), Hara et al.
patent: 4525051 (1985-06-01), Wong et al.
patent: 4752795 (1988-06-01), Desormeaux
patent: 4855773 (1989-08-01), Harvey
Brown Brian W.
Eastman Kodak Company
Fields Roger A.
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