Winding – tensioning – or guiding – Unwinding and rewinding a machine convertible information... – Cartridge system
Patent
1991-04-16
1995-07-25
Jillions, John M.
Winding, tensioning, or guiding
Unwinding and rewinding a machine convertible information...
Cartridge system
354275, G03B 1726
Patent
active
054354994
ABSTRACT:
A cassette shell of a photographic film cassette has a film passageway through which negative film is fed. A light-shielding member is disposed across the film passageway, and is elastic and rectangular. A side of the light-shielding member parallel to a spool in the cassette is attached to an inside surface of the film passageway. Structure is provided for receiving at least a free side of the light-shielding member opposite the side that is attached. In a preferred embodiment, a second light-shielding member similar to the first light-shielding member is disposed across the film passageway outside the first light-shielding member. In this manner, the inside of the film passage mouth is shielded from light. The film leader is advanced reliably to the outside of the cassette shell by rotating the spool, in the case of a cassette provided with structure for advancing the film leader by rotating the spool. In another preferred embodiment, a fine nap is provided on interior surfaces of the two light-shielding members. Light is trapped by the nap, while the nap prevents the negative film from being scratched by contact with the light-shielding members.
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Fuji Photo Film Co. , Ltd.
Jillions John M.
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