Photographic film

Details Photographic film Photographic film

1981-05-01

1982-07-20

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Structurally defined

430501, 352241, G03C 302, G03C 176

Patent

active

043406637

ABSTRACT:
A photographic film, particularly a 35-mm film, which can tear only in a direction opposite from the picture regions of the film. Cuts, such as a V-shaped notch or a linear cut, are formed in the film extending from each perforation in a direction opposite to the picture region of the film. If a high force is applied to the perforations of the film while the film is being conveyed, the film will tear only at the notch thus absorbing the force and preventing damage to the film conveying mechanism.

REFERENCES:
patent: 1205822 (1916-11-01), Trivelli
patent: 1450795 (1923-04-01), Dohe
patent: 1602599 (1926-10-01), Van Derhoet
patent: 3379605 (1968-04-01), Nerwin
Glatkides, Photographic Chemistry, vol. 1, 1958, pp. 441-467.

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