Device for illuminating and adjusting the amount of light in mac

Details Device for illuminating and adjusting the amount of light in mac Device for illuminating and adjusting the amount of light in mac

1978-01-26

1979-10-23

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 3R, 355 50, G03B 2776

Patent

active

041719050

ABSTRACT:
Device for illuminating and adjusting the amount of light in machines for electrostatically preparing printing matrices, wherein at least one pair of light sources are arranged on a driven carriage, also carrying a selectively shaped diaphragm, the aperture of which varies as a function of the carriage position.

REFERENCES:
patent: 3981577 (1976-09-01), Tsilibes
patent: 4068948 (1978-01-01), Ritzerfeld

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