Image recording apparatus

Details Image recording apparatus Image recording apparatus

1988-05-20

1990-02-13

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 27, 355 71, 430138, G03B 2737, G03B 2752, G03B 2772

Patent

active

049011049

ABSTRACT:
In an image recording apparatus, a halftone screen having its light transmittance varying regularly is arranged on an optical path extending between a light source and a photo-sensitive recording medium. The halftone screen is movable along the optical path between an operative position where a screening effect of the halftone screen is validated and an inoperative position where the screening effect of the halftone screen is invalidated. A controller is provided for controlling the position of the halftone screen in such a manner that when an image on an original is of a continuous tone, the halftone screen is moved to the operative position, while when the image on the original is of a dot tone, the halftone screen is moved to the inoperative position.

REFERENCES:
patent: 2740323 (1956-04-01), Borth et al.
patent: 3335636 (1967-08-01), Atkinson

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