Copying apparatus

Details Copying apparatus Copying apparatus

1977-06-10

1978-09-26

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Focus or magnification control

G03B 2734

Patent

active

041165616

ABSTRACT:
A copying apparatus having a changeable copying magnification is provided with focusing lens means having a variable focal length positionally fixed as a whole, and optical path length changing means for increasing or reducing the length of the optical path before or behind the focusing lens. An original to be copied and a photosensitive medium are selectively brought into one of a conjugate relationship for forming a life-size image and a conjugate relationship for forming a reduced or a magnified image. Desirably, the optical path length changing means displaces the optic axis in order to register one side edge of the image at different magnifications to a predetermined position on the photosensitive medium.

REFERENCES:
patent: 3476478 (1969-11-01), Rees
patent: 3535037 (1970-10-01), Koizumi
patent: 3572924 (1971-03-01), Matsumoto et al.
patent: 3614222 (1971-10-01), Post et al.
patent: 3711199 (1973-01-01), Koizumi
patent: 3884574 (1975-05-01), Doi et al.
patent: 4040733 (1977-08-01), Satomi
98318-1971, Japanese Amemiya Application 9/1973.

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