Photographic film cassette

Details Photographic film cassette Photographic film cassette

1991-09-05

1993-10-05

Stodola, Daniel P.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 718, G03B 1726

Patent

active

052497534

ABSTRACT:
A photographic film cassette where rotation of a spool causes a film leader to advance to an exterior of a cassette shell from a film chamber through a film passageway. A pair of flanges are provided on both ends of the spool. Round ridges formed on inside surfaces of the flanges are in contact with edges of an outermost convolution of a roll of film. The roll of film is thereby prevented from loosening. A plurality of radially extending slits formed on the flanges in a radial manner divides the flanges into sections. The resistance of the flanges is reduced when the flanges are spread for releasing the film leader by spreaders. In another preferred embodiment, a plurality of holes or openings is formed on the flanges in order to reduce the resistance of the flanges against a spreading force for releasing the film leader.

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