Photocopying – Projection printing and copying cameras – Focus or magnification control
Patent
1976-05-03
1978-02-28
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Focus or magnification control
200 50R, 355 8, 355 14, 355 51, 355 66, G03B 2770, H01H 920, H01H 3346
Patent
active
040764176
ABSTRACT:
An optical apparatus and reproducing machine includes an optical system for viewing a document and for projecting an image thereof onto a moving imaging surface. A plurality of optical elements are arranged along an optical path. The projected image magnification is changed by changing the position of at least two optical elements. An interlock apparatus associated with the magnification changing system is provided for inhibiting the change in position of one of the two optical elements until the other of the two optical elements has completed its change in position, upon the changing of the magnification of the optical system.
REFERENCES:
patent: 3182196 (1965-05-01), Leishman
patent: 3233052 (1966-02-01), Contal
patent: 3614222 (1971-10-01), Post
patent: 3837743 (1974-09-01), Amemiya
patent: 3877804 (1975-04-01), Hoppner
patent: 3936150 (1976-02-01), Ikeda
patent: 3950091 (1976-04-01), Brooke
patent: 3989371 (1976-11-01), Valentine
patent: 3990792 (1976-11-01), Kono et al.
patent: 4011012 (1977-03-01), Kawai
Corbin Robert W.
Hayashi Fujio
Green Clarence A.
Ralabate James J.
Weinstein Paul
Wintercorn Richard A.
Xerox Corporation
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