Photocopying – Projection printing and copying cameras – Illumination systems or details
Patent
1978-06-28
1980-01-29
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Illumination systems or details
G03B 2754
Patent
active
041859146
ABSTRACT:
A reproduction camera for producing screen modified images of an original copy suitable for subsequent use in the production of ink printed pictures features an objective lens spaced apart from a film holder located at the image plane of the objective by an extensible bellows. A light source providing the conventional priming (or bump) exposure used in processing screen modified images is arranged within the bellows closely adjacent the edge of the film holder surrounding the image plane. Light from the light source is directed toward the bellows so that only scattered light, which is thus evenly distributed, is received at the image plane. The light source is conveniently four separate lamps arranged generally at the corners of the bellows and the images of these lamps formed at the object plane of the objective helps in initially locating the original from which the screen modified image is to be made.
REFERENCES:
patent: 3040640 (1962-06-01), Abel, Jr. et al.
patent: 3249000 (1966-05-01), Pack
patent: 3619055 (1971-11-01), Archer et al.
patent: 3823413 (1974-07-01), Cole
Dr. Boger Photosatz GmbH
Wintercorn Richard A.
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