Electrophotographic copying machine

Details Electrophotographic copying machine Electrophotographic copying machine

1979-04-09

1981-08-18

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 11, 355 57, G03B 2754, G03G 1500, G03B 2734

Patent

active

042843464

ABSTRACT:
An electrophotographic copying machine comprises a transparent support for the support of an original to be copied, a photo-receptor, an optical projecting system for projecting an image of the original onto the photo-receptor and an exposure adjustment for controlling a pattern of distribution on the photo-receptor of rays of light carrying the image of the original. The optical projecting system includes a projecting lens assembly supported for movement between at least first and second positions wherein the image of the original can be reproduced on a copying paper in different magnifications. The exposure adjustment is positioned between the transparent support and the optical projecting system and is comprised of a fixedly supported light shielding member.

REFERENCES:
patent: 3438704 (1969-04-01), Schoen
patent: 3614222 (1971-10-01), Post et al.
patent: 3640622 (1972-02-01), Shinozaki
patent: 3883244 (1975-05-01), Whitaker et al.
patent: 3917393 (1975-11-01), Nier
patent: 4080057 (1978-03-01), Nakane et al.
patent: 4125323 (1978-11-01), Ikeda et al.

Affiliated with

Also associated with

Rating

Electrophotographic copying machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrophotographic copying machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrophotographic copying machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-35708