Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1992-06-22
1993-09-21
Gray, David M.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 711, G03B 1726
Patent
active
052473252
ABSTRACT:
A photographic film cassette has a spool, rotation of which causes a film leader to advance outside of a cassette shell. In a receiving recess formed on a spool end for receiving a rewinding shaft of a camera, a pentagonal circumference is formed for receiving a driving force from the rewinding shaft. Inclined planes are formed on the inside of the receiving recess for guiding insertion of the rewinding shaft into the receiving recess. Because the spool is rotated in axial coincidence with the rewinding shaft, the film can be advanced reliably outside of the cassette by slipping the outermost turn of the wound film smoothly with reference to a self-advancing mechanism. In a preferred embodiment, a film cassette is constituted by two shell halves, with one of which a part of the film passage mouth is integrated. A positioning member is integrated with the same shell half for positioning the cassette shell in contact with a receiving member formed in a film loading chamber. The film passage mouth thus can be connected precisely to the film passageway in the camera.
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Fuji Photo Film Co. , Ltd.
Gray David M.
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