Film cassette

Details Film cassette Film cassette

B - Operations, Transporting

65

H

242/61.01

B65H 75/02 (2006.01) G03B 17/30 (2006.01)

Patent

CA 2023896

- o - FILM CASSETTE ABSTRACT OF THE DISCLOSURE A film cassette comprises a spool rotatable in an unwinding direction to thrust a leader section of a film roll coiled about the spool out of the cassette and in a winding direction to rewind the leader into the cassette; a pair of flanges coaxially arranged along the spool to normally permit each of the flanges to be independently rotated relative to the spool in the unwinding and winding directions and to radially confine the film roll within skirted peripheries of the flanges; and a film stripper received between the leader and the nest-inward convolution of the film roll to free the leader from the flanges by inducing the leader to flex the flanges slightly away from one another at their skirted peripheries responsive to rotation of the spool in the unwinding direction. According to the invention, at least one of the flanges can be fixed to the spool to make the fixed flange rotate in unity with the spool when the spool is rotated in the unwinding direction, to improve the ability of the spool to thrust the leader from the cassette. Conversely, the fixed flange can be released from the pool to permit it to be independently rotated relative to the spool when the spool is rotated in the winding direction, to generally ensure the leader will be rewound within the skirted periphery of the flange.

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