Device for reproduction and tracing

Details Device for reproduction and tracing Device for reproduction and tracing

1985-06-18

1987-09-01

Frankfort, Charles

Optics: image projectors

Episcope

353 63, 355 70, 362 12, 362250, 362285, G03B 2106

Patent

active

046905278

ABSTRACT:
The invention relates to a device for reproduction and tracing by forming an image of an original, at desired scale which is produced by at least one lens, on a screen on which a sheet of photosensitive materials, such as a picture film, or tracing paper is extended, comprising separate illumination systems for reproduction and tracing, wherein the illumination system for tracing is retracted in a retraced position located off the lighting space of the illumination system for reproduction, and turned over so as to eliminate spoilage of the quality of the reproduced picture by diminishing irregular reflection from the illumination system for tracing to the lens when a part of light from the illumination system for reproduction is emitted thereto during the reproduction operation.

REFERENCES:
patent: 1090984 (1914-03-01), Hawthorne
patent: 1781372 (1930-11-01), Denecke
patent: 3375752 (1968-04-01), Fairbanks et al.
patent: 3592543 (1971-07-01), Bickl et al.
patent: 3632204 (1972-01-01), Friedel
patent: 4164009 (1979-08-01), Maguire, Jr. et al.

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