Photocopying – Including fiber optics
Patent
1986-09-24
1989-02-28
Braun, Fred L.
Photocopying
Including fiber optics
118645, 346157, 430 42, G03G 1501
Patent
active
048090387
ABSTRACT:
A color electrographic apparatus is provided including a latent image forming device for forming plural electrostatic latent images respectively corresponding to image signals of different colors on the surface of a photoconductor, a plurality of toners of different colors each of which has the same polarity as the photoconductor, and a plurality of developing devices which are disposed in the vicinity of the photoconductor and each of which contain a colored toner for respectively developing the latest image without contact with the photoconductor under a direct electric field. A toner image is formed by a repeating cycle of making electric charges on the surface of the photoconductor, activating the latent image forming device so as to light expose an image corresponding to respective image signals of different colors on the surface of the photoconductor and activating a respective developing device so as to develop the exposed image by a respective toner corresponding to the image signal. Even further, a reversal flying preventing device is provided for preventing reversal flying of toner of the image from the photoconductor to one of the developing devices which is not developing as the image passes before the developing device.
REFERENCES:
patent: 4264185 (1981-04-01), Ohta
patent: 4308821 (1982-01-01), Matsumoto et al.
patent: 4351604 (1982-09-01), Karasawa et al.
patent: 4416533 (1983-11-01), Tokunaga et al.
Takashima Yuji
Yamamoto Hajime
Braun Fred L.
Matsushita Electric - Industrial Co., Ltd.
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