Thrust-type film cassette assembly

Details Thrust-type film cassette assembly Thrust-type film cassette assembly

1991-05-06

1992-12-22

Gellner, Michael L.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 711, G03B 1726

Patent

active

051737302

ABSTRACT:
A new film cassette assembly comprises a thrust type cassette and a roll of a photographic film having particular properties. One such property is a low coefficient of friction between the emulsion side and back side of the film. In preferred embodiments the film has a stiffness sufficient to avoid buckling of the film when the film spool is rotated in the unwinding direction and is very thin. Most preferably, it is formed from a hydrophilic copolyester having the desired stiffness.

REFERENCES:
patent: 4834306 (1989-06-01), Robertson et al.
patent: 4848693 (1989-07-01), Robertson
patent: 4866469 (1989-09-01), Shiba et al.
patent: 4883235 (1989-11-01), Niedospial, Jr.
patent: 4948063 (1990-08-01), Niedospial, Jr.

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