Electrophotographic copying method

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...

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Details

355 14D, 355 14R, G03G 1306, G03G 1310

Patent

active

043328776

ABSTRACT:
In an electrophotographic copying apparatus having an exposure optical system capable of performing variable magnification of copies to be made by changing the relative movement speed of an original and an image scanning optical system to 1/m in accordance with the magnification m of copies to be made from the original and changing the optical position of an optical system for forming an image on a photoconductor in accordance with the magnification m, and projecting a light image of the original to the photoconductor which is moved at a predetermined speed, so that a variably magnified latent electrostatic image is formed on the photoconductor, an electrophotographic copying method including a step of changing a development bias voltage at the development of the latent electrostatic image in accordance with each magnification.

REFERENCES:
patent: 4035069 (1977-07-01), Yano

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