Photocopying – Projection printing and copying cameras – Focus or magnification control
Patent
1982-09-27
1985-11-05
Prescott, A. C.
Photocopying
Projection printing and copying cameras
Focus or magnification control
355 3R, 355 8, 355 56, G03G 1500
Patent
active
045510130
ABSTRACT:
An electrostatic copying process and apparatus capable of forming copies in at least two different ratios. The formation of a copied image involves exposure scanning of the image of an original document and projecting it on a photosensitive member through an optical device. The change of the ratio of copying is achieved by changing the ratio of projection of the image of the document onto the photosensitive member by the optical device, and also changing the speed of the scanning.
REFERENCES:
patent: 3614222 (1971-10-01), Post et al.
patent: 4279497 (1981-07-01), Satomi
patent: 4295736 (1981-10-01), Ikeda
Hirobe Junichi
Irie Yoichiro
Iwao Noriyuki
Murakami Masahiro
Nakanishi Tsugio
Mita Industrial Co. Ltd.
Prescott A. C.
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