Copying apparatus

Details Copying apparatus Copying apparatus

1985-06-06

1987-04-07

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 15, 355 14R, 250559, G03G 2100

Patent

active

046555811

ABSTRACT:
A copying apparatus including a measuring device for measuring density of an image of an original document, a decision device for making a decision as to whether or not a measurement obtained by the measuring device is larger than a reference value, and a changeover device for changing over, on the basis of the decision made by the decision device, to one of a two-rotation process and a three-rotation process an operation for not only subjecting a photosensitive member to charge erasing but cleaning the photosensitive member such that the operation is performed once or twice during one copying operation in the two-rotation process and the three-rotation process, respectively.

REFERENCES:
patent: 4239374 (1980-12-01), Tatsumi et al.
patent: 4352553 (1982-10-01), Hirahara
patent: 4372674 (1983-02-01), Yukawa
patent: 4465360 (1984-08-01), Yamagishi et al.
patent: 4488802 (1984-12-01), Sunaga et al.
patent: 4564287 (1986-01-01), Yamada
patent: 4579440 (1986-04-01), Katoh

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