Automatic color printing apparatus

Details Automatic color printing apparatus Automatic color printing apparatus

1976-08-04

1978-07-18

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Multicolor picture

G03B 2778

Patent

active

041012178

ABSTRACT:
An exposure control for use in photographic color printing apparatus has transducers which are sensitized in the additive primary colors and scan discrete areas of an original to transmit appropriate signals to integrator circuits which, in turn, transmit signals for regulation of the ratio of primary colors in printing light. The transducers further transmit signals to circuits which determine the presence of one or more areas of predominant color in an original and modify the signals which are transmitted to the integrators, either by weakening the intensity or by preventing the transmission of corresponding transducer signals. Detection of areas of predominant color can result in generation of signals which are used to contribute to determination of the total amount of printing light.

REFERENCES:
patent: 3110761 (1963-11-01), Allen et al.
patent: 3400632 (1968-09-01), Wahlt
patent: 3502410 (1970-03-01), King et al.
patent: 3527540 (1970-09-01), Bowker et al.
patent: 3653759 (1972-04-01), Klein
patent: 3697174 (1972-10-01), McCune
patent: 3709613 (1973-01-01), Zahn et al.
patent: 3797933 (1974-03-01), Sable
patent: 3819275 (1974-06-01), Aimi et al.
patent: 3888580 (1975-06-01), Amano et al.
patent: 3944362 (1976-03-01), Dailey

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