Pressure member urging mechanism

Details Pressure member urging mechanism Pressure member urging mechanism

1979-08-27

1981-09-22

Gonzales, John

354203, G03B 100, G03B 1700

Patent

active

042906768

ABSTRACT:
In a camera, a pressure plate is urged against a film frame to hold the film frame in the focal plane of a picture-taking lens during exposure. A resiliently flexible strip, mounted on a loading door of the camera, is normally disposed in a storage plane. An actuating pin, which engages the flexible strip when the loading door is closed, connects the strip to camera mechanism, such as a shutter release. The actuating pin operates, in response to movement of the shutter release, to partially bow an intermediate portion of the strip from the storage plane by sliding a first portion of the strip in the storage plane toward a second, stationary portion of the strip. Bowing of the strip moves the intermediate portion toward the exposure plane to urge the pressure plate against the film frame before exposure and establishes a resilient force in the bowed portion for returning the strip to the storage plane after exposure.

REFERENCES:
patent: 421923 (1890-02-01), Good
patent: 1829332 (1931-10-01), Beck
patent: 1872353 (1932-08-01), Schulz
patent: 1987254 (1935-01-01), Goldhammer
patent: 2753777 (1956-07-01), Faulhaber et al.
patent: 3311037 (1967-03-01), Winkler et al.
patent: 3563144 (1971-02-01), Fukino
patent: 3707904 (1973-01-01), Engelsmann et al.
patent: 3754460 (1973-08-01), Tanaka

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