Device for transporting slide film mounts in a slide film projec

Details Device for transporting slide film mounts in a slide film projec Device for transporting slide film mounts in a slide film projec

1980-03-06

1982-05-25

Shepperd, John W.

Optics: image projectors

Slide transfer mechanism

Feeder magazine and receiver magazine

G03B 2300

Patent

active

043313981

ABSTRACT:
A device for transporting a plurality of slide film mounts in either direction between a pair of magazines in a slide film projector comprises a pair of endless mount-driving belts, each of which has a stretch adapted to run across the open end of each magazine in close contact therewith and at least a pair of spaced mount-catching stepped shoulder portions formed in the belt surface facing the open ends of the magazines. In operation from a starting position, each belt is driven by actuating a starting button so that a mount, if engaged by a shoulder portion, is received in one of the magazines by the movement of that shoulder portion of the belt, and, thereafter, one of the mounts housed in the other magazine is caught by that shoulder portion of the belt and moved out of that other magazine toward the film projection gate, stopped, and held thereat for projection so as to complete a cycle. Continuous operation may be effected manually or automatically by a control circuit. In each cycle, the belt may be moved as above or, alternatively, it may be moved in one and the same direction during one cycle until the same shoulder portion, after urging one mount into a magazine, moves further to catch the next mount in the other magazine and moves it to the film projection gate. The direction of the respective movement of the belt in each cycle can be reversed to transport mounts from one magazine to the other.

REFERENCES:
patent: 1489632 (1924-04-01), Enell
patent: 2412246 (1946-12-01), Blumenstein
patent: 3412495 (1968-11-01), Zillmer
patent: 3457009 (1969-07-01), Landesman

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