Image forming apparatus with a common power source for various c

Details Image forming apparatus with a common power source for various c Image forming apparatus with a common power source for various c

1989-05-31

1990-04-24

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355234, 355233, 355219, 355218, G03G 1300, G03G 1500

Patent

active

049203797

ABSTRACT:
An image forming apparatus with a main body composed of a light source, a photoreceptor, charging device for electrostatically a charging the surface of the photoreceptor, a developing device for supplying toner particles to the surface of the photoreceptor a transferring charger for transferring a toner image formed on the surface of the photoreceptor onto a copying sheet, and a high-voltage source for applying a high voltage trigger to both said charging device and the transferring charger simultaneously. The apparatus is designed to execute original scanning as an original glass plate is moved with respect to the main body, characterized in containing a reflecting unit for reflecting the light from the light source to illuminate the surface of the photoreceptor at an area between the charging device and the developing device, the reflecting unit is disposed at a position corresponding to the trailing end of the original glass plate in its forward movement for original scanning. The apparatus is designed to eliminate the need of providing an independent light source for blank exposure thereby simplifying the arrangement for blank exposure to be performed with respect to the photoreceptor and saving the manufacturing cost for the apparatus.

REFERENCES:
patent: 4080071 (1978-03-01), Kobayashi
patent: 4552447 (1985-11-01), Sagara et al.
patent: 4743947 (1988-05-01), Yamamoto

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