Film projection gate

Details Film projection gate Film projection gate

1979-03-19

1981-03-24

Stephan, Steven L.

Optics: image projectors

Film gate

352147, 353 61, G03B 152, G03B 2116

Patent

active

042576954

ABSTRACT:
A film gate for image projection apparatus provides improved structure for directing cooling air across the surfaces of supported film. The outlets of the cooling air conduits are located adjacent edges of supported film and configured and oriented to create Coanda effect attachment of their issuing air streams to the film surfaces.

REFERENCES:
patent: 1408203 (1922-02-01), Jenkins
patent: 1684304 (1928-09-01), Berg
patent: 2315914 (1943-04-01), Wengel
patent: 3179007 (1965-04-01), Benford

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