Image forming apparatus employing non-magnetic and magnetic tone

Details Image forming apparatus employing non-magnetic and magnetic tone Image forming apparatus employing non-magnetic and magnetic tone

1987-12-02

1990-06-26

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355245, 355271, 355326, 430 45, G03G 1514

Patent

active

049376306

ABSTRACT:
An image forming apparatus employs a non-magnetic developing agent and a magnetic developing agent which have been charged to opposite polarities to develop at least first and second latent images formed on an image carrier in response to image information, thus forming first and second developed images. The first and second developed images are charged to the same polarity as that of the magetic developing agent, prior to the transfer onto a transfer medium so as to provide a vivid transferred image.

REFERENCES:
patent: 4308821 (1982-01-01), Matsumoto et al.
patent: 4395476 (1983-07-01), Kanbe et al.
patent: 4416533 (1983-11-01), Tokunaga et al.
patent: 4443095 (1984-04-01), Tsushima et al.
patent: 4539281 (1985-09-01), Tanaka et al.
patent: 4634259 (1987-01-01), Oishi et al.
patent: 4660961 (1987-04-01), Kuramoto et al.

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