Film cassette

Details Film cassette Film cassette

1990-03-08

1991-09-10

Stodola, Daniel P.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

354275, G03B 104, G03B 1726

Patent

active

050466810

ABSTRACT:
In a film cassette, a spool core is supported within a cassette shell for rotation in an unwinding direction to automatically thrust a leading end of a filmstrip coiled about the spool core to the exterior of the shell. A pair of flanges are arranged in coaxially spaced relation along the spool core to radially confine the filmstrip. The flanges are sufficiently flexible to permit the filmstrip to flex the flanges farther apart to escape the confinement of the flanges when the spool core is rotated in the unwinding direction. According to the invention, a relatively short longitudinal section of the filmstrip proximate a trailing end of the filmstrip attached to the spool core is sufficiently tapered to permit it to extend between the flanges without having to flex the flanges farther apart. This construction permits the spool core and the flanges to be placed in the cassette shell during assembly of the film cassette, with the flanges in a normal-relaxed rather than flexed condition, and for the filmstrip then to be wound easily about the spool core.

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