Light shielding container for photo-sensitive material

Details Light shielding container for photo-sensitive material Light shielding container for photo-sensitive material

1993-05-28

1995-01-17

Stodola, Daniel P.

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Cartridge system

G03B 1726

Patent

active

053819802

ABSTRACT:
A container for containing a photosensitive material such as a cassette shell of a photographic film cassette, in which a roll of photographic film wound on a spool is contained in the cassette shell. The cassette shell is formed from a resin material by molding to have a satisfying light imperviousness and a surface color that is gray rather than black. The resin material is loaded with not more than 2% additive agent consisting of carbon black and titanium oxide. The weight percentage of the titanium oxide is equal to or more than that of the carbon black. The thickness of walls of the cassette shell is not less than 0.5 mm.

REFERENCES:
patent: 3945584 (1976-03-01), Mangan
patent: 3993488 (1976-11-01), Oishi
patent: 4834306 (1989-05-01), Robertson et al.
patent: 5188789 (1993-02-01), Nishiura
patent: 5211348 (1993-05-01), Enomoto
patent: 5250404 (1993-10-01), Sakakibara

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