Electrostatic copying machine

Details Electrostatic copying machine Electrostatic copying machine

1973-12-26

1976-08-24

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 16, 96 1C, G03G 1526

Patent

active

039763757

ABSTRACT:
An electrophotographic copier having an endless photoconductive belt whose circumference is an integral multiple of one dimension of each of two sizes of exposure areas corresponding to two sizes of copy paper. A set of cams for each size of copy paper operates switches to control the operation for that paper size. At the end of each exposure cycle the belt is positioned so that the next exposure is made on a different area of the belt and so that the image is not located over the seam or joint in the belt. The belt is charged at the end of every copying cycle so that the next cycle can begin with immediate exposure, and the size of the area charged is set automatically when the size of the copy is selected.

REFERENCES:
patent: 2890343 (1959-06-01), Bolton
patent: 3503677 (1970-03-01), Uchiyama
patent: 3521950 (1970-07-01), Gardner et al.
patent: 3605534 (1971-09-01), Alman et al.
patent: 3661452 (1972-05-01), Hewes et al.
patent: 3724940 (1973-04-01), Koizumi
patent: 3790273 (1974-02-01), Tanaka
patent: 3796488 (1974-03-01), Tanaka et al.
Hider et al., "An Electrographic Printer with Asynchronous Image Belt," IBM Technical Disclosure Bulletin, vol. 9, No. 11, Apr. 1967, p. 1526.

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