Film strip joint for continuous projection

Details Film strip joint for continuous projection Film strip joint for continuous projection

1977-09-16

1979-01-16

Schacher, Richard A.

Advancing material of indeterminate length

Threading device

352126, 352235, G03B 156

Patent

active

041345266

ABSTRACT:
A joint for the ends of an elongated perforated film strip which is movable alongside an annularly closed guide path by a conveying means, wherein on the one end of the film strip corresponding in length substantially to that of said guide path a follower is secured which projects from the plane of the film, and wherein at the other end of said film strip a lock-in aperture is formed for free motion engagement of said follower. By reason of this free motion engagement, the film strip joint renders possible, within certain limits, to equalize length tolerances of the film strip, plus at the same time the automatic uncoupling of the film strip ends.

REFERENCES:
patent: 1655297 (1928-01-01), Thornton
patent: 1977354 (1934-10-01), Reynolds

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