Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1990-01-12
1991-07-16
Stodola, Daniel P.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
354275, G03B 1726
Patent
active
050318551
ABSTRACT:
A film cassette comprises a spool rotatable in unwinding and winding directions to thrust a leader section of a film roll coiled about the spool from the cassette and to return the leader to 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 two directions and to radially confine the film roll within skirted peripheries of the flanges; and a film stripper received between the leader and the next-inward convolution of the film roll to free the leader from the flanges by inducing the leader to flex the flanges away from one another at their skirted peripheries responsive to rotation of the spool in the unwinding direction. According to the invention, the spool has a pair of integral disks located within the skirted peripheries of the flanges to include the film roll between the disks. At least one of the flanges can be fixed to at least one of the disks 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 disk 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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Fraser Mark D.
Wolf Michael T.
Yokajty Joseph E.
Eastman Kodak Company
Fields Roger A.
Nguyen John Q.
Stodola Daniel P.
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