1980-06-03
1981-06-23
Griffin, Donald A.
354217, G03B 1726, G03B 1736
Patent
active
042747287
ABSTRACT:
The film cassette includes a main part having a chamber for the film supply and a detachable part movable transversely to the longitudinal direction of the main cassette part and supporting for rotation a take-up spool; a sprocket roller for engaging the film is arranged in the main cassette part between the supply chamber and the take-up spool and being engageable by a first driving gear by means of a clutch controlled by the film transport mechanism in the camera and a manually operable pushbutton provided on the main cassette part; a blocking mechanism for the sprocket roller cooperates with the detachable cassette part to block the roller when the latter part is in its displaced position and an arresting mechanism is arranged in the detachable part to permit the rotation of the take-up spool in the direction opposite to the feeding direction of the film when at least a portion of the film is wound up on the take-up spool and to arrest the rotation of the take-up in the opposite direction when the spool is empty.
REFERENCES:
patent: 461308 (1891-10-01), Blair et al.
patent: 477243 (1892-06-01), Brownell
patent: 657942 (1900-09-01), Juruick
patent: 2911894 (1959-11-01), Hennig et al.
patent: 3728949 (1973-04-01), Edwards
patent: 3780634 (1973-12-01), Van Osch
Griffin Donald A.
Striker Michael J.
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