Shutter-opening presetting mechanism for motion picture copying

Details Shutter-opening presetting mechanism for motion picture copying Shutter-opening presetting mechanism for motion picture copying

1975-02-25

1977-01-18

Peters, Jr., Joseph F.

Photocopying

Projection printing and copying cameras

Illumination systems or details

354 52, 354247, 355 77, 355 83, 355101, G03B 942, G03B 2748, G03B 2778

Patent

active

040036529

ABSTRACT:
Variation in the width of the shutter opening in a motion picture film copying machine is rapidly effected to control the amount of light passed through the shutter for transmission of the image from the master film onto the blank sensitized film running in registry therewith. Such rapid change in size of the opening in the shutter is effected by presetting the predetermined fixed extent of opening or closing of the opposed shutter halves in advance and shifting these halves to the scheduled predetermined position on signal from a sensor associated with the moving master film strip.

REFERENCES:
patent: 1024242 (1912-04-01), Atherton
patent: 2711121 (1955-06-01), Barsam, Jr.
patent: 3140645 (1964-07-01), Block et al.
patent: 3192458 (1965-06-01), Batterman et al.
patent: 3504972 (1970-04-01), Suzuki et al.
patent: 3722980 (1973-03-01), Craig
patent: 3752577 (1973-08-01), Grossitite et al.

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