Film cassette

Details Film cassette Film cassette

1990-03-08

1991-04-02

Cuchlinski, Jr., William A.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 718, 354275, G03B 104, G03B 1726

Patent

active

050041762

ABSTRACT:
In a film cassette, a spool core is 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. A pair of flanges are arranged in spaced relation along the spool core to radially confine the leader. The flanges are adapted to be flexed apart to permit the leader to readily escape the confinement of the flanges when the spool core is rotated in the unwinding direction. According to the invention, the leader has respective edge portions for flexing the flanges apart in succession when the spool core is rotated in the unwinding direction, whereby the leader can more easily overcome any resistance the flanges may present to movement of the leader outwardly of the flanges.

REFERENCES:
patent: 3684206 (1972-08-01), Edwards
patent: 4860037 (1989-08-01), Harvey
patent: 4883235 (1989-11-01), Nideospial et al.
patent: 4883326 (1989-11-01), Niedospial et al.
patent: 4899948 (1990-02-01), Niedospial et al.

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