Leader strip for motion picture film

Details Leader strip for motion picture film Leader strip for motion picture film

1975-09-15

1977-07-26

Robinson, Ellis

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

352235, 428327, 428335, 428336, 428413, 428425, 428454, 428481, 428483, 428507, 428509, 428510, 428536, 96 78, B32B 2714, B32B 516

Patent

active

040384535

ABSTRACT:
Leader strip for motion picture films is described which is composed of a substrate of cellulose acetate or polyester, a gum-removing layer comprising an organic binder selected from the group consisting of cellulose esters, polyurethanes, polyacrylonitrile, copolymers of acrylonitrile and vinylidene chloride, and epoxy resins, a gum-shearing agent of finely divided polymeric particles, said agent being bonded by the organic binder to the substrate, said gum-shearing agent being a member selected from the group consisting of polyesters, polyamides, polyimides and polyolefins, said polymeric particles having a size less than about five mils.

REFERENCES:
patent: 2091694 (1937-08-01), Taylor
patent: 2286834 (1942-06-01), Rittenhouse
patent: 2606409 (1952-08-01), Gordon
patent: 2770555 (1956-11-01), Cornwall
patent: 2812279 (1957-11-01), Nadeau
patent: 2909449 (1959-10-01), Banigan
patent: 3078759 (1963-02-01), Brunswick
patent: 3227576 (1966-01-01), Van Stappen
patent: 3259537 (1966-07-01), Battista
patent: 3515626 (1970-06-01), Duffield
patent: 3706589 (1972-12-01), Fukuda
patent: 3849191 (1974-11-01), Earhart

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