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A PROPOSED FILM LOCK AND IDENTIFICATION BAND* GARE SCHWARTZ**
Summary. — Cross-banding of reels between exchange and theater calls for some reform to eliminate the confusion caused by this inefficient method. The paper describes a proposed film lock and immediate identification which becomes an integral part of the film itself.
In handling motion picture film, it has always been a problem to hold the film against unwinding either temporarily or permanently. Various expedients, such as metal clips which scar the film, rubber bands which mark the film upon deterioration, small clamps, and the like, have been used for this purpose.
Release prints are bound with a paper band which is wrapped around the reel and held in place by a string. As the band usually contains the data relative to the film, and as they must be removed each time the film is used or examined, and since each band fits only its particular reel, it must be replaced upon the exact reel or confusion results.
The proposed film lock is an integral part of the film so there is no possibility of misapplying the data relative to the films as the lock becomes a part of its respective reel.
The film lock amounts to forming a tongue on the end of the film with a groove or series of grooves formed in the body of the film adapted to receive the tongue, so that the outer strand of film may be locked on itself by inserting the tongue through one of the grooves. The friction of the tongue between the strands of the roll will prevent the tongue from withdrawing and the normal tendency of the film roll to expand will exert a continuous pressure so that the tongue will be permanently locked in place and the reel will not unwind until the tongue is actually withdrawn. The tongue is forced into the slots merely by a pressure of the thumb around the outside strand of the film until it encounters the slot, whereupon it is worked into the slot and fixed between the two outer strands of the roll. After it is once
* Presented Oct. 25, 1946, at the SMPE Convention in Hollywood. ** Twentieth Century-Fox Film Corporation, Beverly Hills, Calif.
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