Photographic film cassette with light-trapping members and metho

Details Photographic film cassette with light-trapping members and metho Photographic film cassette with light-trapping members and metho

1992-05-28

1993-08-10

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

354275, 156 72, 156293, 156294, G03B 1726

Patent

active

052341763

ABSTRACT:
A photographic film cassette containing of a photographic film whose leading end is initially positioned in a cassette shell and advanced through a film passageway out of the cassette shell by rotation of a spool. Light-trapping members are attached to upper and lower surfaces of the film passageway. After assembling the photographic film cassette, and before loading it into a camera, the leading end is advanced through the film passageway out of the cassette shell and returned to an inside of the cassette shell so that tips of piles of the light-trapping members are arranged so as to push against each other with tips thereof inclined in a film moving direction. In a preferred embodiment, a sheet member is inserted into and drawn from a film passageway to arrange the piles so as to make them incline in a film advancing direction.

REFERENCES:
patent: 4875637 (1989-10-01), Beach

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