Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1990-03-08
1991-09-10
Footland, Lenard A.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
354275, G03B 104
Patent
active
050466801
ABSTRACT:
In a film cassette, a spool core is supported for rotation in an unwinding direction to thrust a leader section of a filmstrip coiled about the spool core through a film passageway to the exterior of the cassette. A pair of flanges are arranged in spaced relation along the spool core to overlie opposite longitudinal edges of the filmstrip to radially confine the filmstrip. The flanges are adapted to permit the longitudinal film edges to force the flanges farther apart to allow the filmstrip to escape the confinement of the flanges to permit the leader section to the thrust outside the cassette. According to the invention, the leader section is relieved to permit its forward edge to be thrust clear of a light-trapping means in the film passageway before the longitudinal film edges begin to force the flanges apart, whereby when the spool core is rotated in the unwinding direction any resistance the light-trapping means and the flanges present to film movement is more easily overcome.
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McCormick Christopher P.
Niedospial John J.
Darling John P.
Eastman Kodak Company
Fields Roger A.
Footland Lenard A.
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