Photographic film cassette

Details Photographic film cassette Photographic film cassette

1992-02-04

1993-11-30

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

354275, 242 719, G03B 1726

Patent

active

052658210

ABSTRACT:
A photographic film cassette has first and second molded spool pieces respectively molded integrally. The first spool piece includes a first core, a first flange, a circumferential lip and cam grooves, whereas the second spool piece includes a second core, a second flange and cam followers. When the first spool piece is rotated in the unwinding direction, the second spool piece is slid in the initial stage of the rotation. The spool is changed from a lengthened state where the flanges are widely spaced to a shortened state where the flanges are less widely spaced. After assuming the shortened state, the first and second spool pieces are kept integral so as to rotate together with a roll of photographic film. A film leader is separated by a separating claw so as to advance to the outside of the cassette shell.

REFERENCES:
patent: 4846418 (1989-07-01), Fairman
patent: 4887776 (1989-12-01), Niedospial, Jr. et al.
patent: 4962401 (1990-11-01), Takahashi
patent: 5031855 (1991-07-01), Wolf et al.
patent: 5040739 (1991-08-01), Wolf et al.
patent: 5083721 (1992-01-01), Okutsu et al.

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