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
050318527
ABSTRACT:
In a film cassette, a film spool comprises a spool core supported for rotation in an unwinding direction to thrust a leader section of a film roll coiled about the spool core to the exterior of the cassette and in a winding direction to return the leader to the interior of the cassette, and a pair of flanges positioned along the spool core to overlie opposite sides of the film roll to radially confine the film roll within skirted peripheries of the flanges. The flanges have respective central openings through which the spool core coaxially extends to normally permit the flanges and the spool core to be independently rotated in the two directions. According to the invention, engagement hooks are rotatably fixed to the spool core for initial rotation with the spool core relative to the flanges in the unwinding direction, for movement into engagement with at least one of the flanges to make the flange rotate in unity with the spool core when the spool core is rotated further in the unwinding direction, to improve the ability of the film spool to thrust the leader from the cassette, and in the film winding direction, for movement out of engagement with the flange to permit the flange to be independently rotated when the spool core is rotated further in the winding direction, to substantially ensure the leader can be rewound within the skirted periphery of the flange.
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Butler Russell J.
Dowling Edward H.
McCormick Christopher P.
Eastman Kodak Company
Fields Roger A.
Nguyen John Q.
Stodola Daniel P.
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