Camera back

Details Camera back Camera back

1978-05-30

1979-10-30

Griffin, Donald A.

354187, 354288, G03B 1750, G03B 1704, G03B 1702

Patent

active

041726472

ABSTRACT:
A camera back for processing film units of the self-developing or instant type. The camera back, which preferably is adapted to replace the back of a conventional camera, e.g., a 35 mm camera, includes a first housing for supporting a film cassette containing a stack of film units in position for exposure of an endmost film unit in the stack and a pair of rollers for spreading a processing fluid across an element of the film unit after it has been photographically exposed. A second housing including an expansible chamber is reciprocally mounted to the first housing for movement between a first position in which the chamber is collapsed and a second position in which it is extended. A gear rack is coupled to the second housing and to a gear on one of the rollers for driving the latter. The exposed film unit is processed by moving its leading edge into the bite of the rollers and then manually grasping the second housing and moving it from the first position to the second position. This movement is used to drive the roller and thus advance the exposed film unit through the rollers and into the continually expanding chamber which provides a dark environment for the film unit.

REFERENCES:
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patent: 3103865 (1963-09-01), Mason et al.
patent: 3350990 (1967-11-01), Finelli et al.
patent: 3618493 (1971-11-01), Erlichman
patent: 3852780 (1974-12-01), Augustin et al.
patent: 3852781 (1974-12-01), Erlichman
patent: 3852783 (1974-12-01), Kennedy et al.
patent: 4023191 (1977-05-01), Augustin et al.
patent: 4034386 (1977-07-01), Gold
patent: 4075643 (1978-02-01), Lane

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