Projection device and loop box therefor

Details Projection device and loop box therefor Projection device and loop box therefor

1979-04-13

1983-01-04

Stephan, Steven L.

Optics: image projectors

Picture carrier

242 5501, 352127, 352166, 353122, 353DIG2, G03B 2100, B65H 7502

Patent

active

043670202

ABSTRACT:
A projection device comprising a film projector and a loop box for a continuous film in which the projector includes a sprocket for feeding the continuous loop of film through a film gate which may be of the customary type. The loop box comprises a frame having transversely and longitudinally spaced upper and lower shaft supports, a plurality of shafts journaled in each of said upper and lower shaft supports, a plurality of pulleys rotatably mounted on each of the shafts by means of ball bearings and means to drive each shaft in the direction which the rollers mounted thereon move when the film loop is advanced through the film gate by the drive sprocket.

REFERENCES:
patent: 1607740 (1926-11-01), Griffiths
patent: 1634174 (1927-06-01), Cornett
patent: 1891225 (1932-12-01), Fear
patent: 2101126 (1937-12-01), Babb
patent: 3139790 (1964-07-01), Kipping
patent: 3680803 (1972-08-01), Takata

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