Color image forming apparatus with an organic photoconductor

Details Color image forming apparatus with an organic photoconductor Color image forming apparatus with an organic photoconductor

1998-12-30

2000-03-21

Beatty, Robert

Electrophotography

Image formation

Photoconductive member

399177, 399128, 399296, 399178, 347118, G03G 1500

Patent

active

060412046

ABSTRACT:
In a color image forming apparatus provided with a photoreceptor having a rotatable peripheral surface; plural sets of a charging device, an imagewise exposure device, and a developing device, each set of the plural sets is provided separately from other sets around the peripheral surface of the photoreceptor so that plural color component images are formed one after another by the plural sets and are superimposed so as to form a color image on the peripheral surface during a single rotation of the peripheral surface. The developing device has a casing and the imagewise exposure device and the developing device of each set are arranged such that a portion on the peripheral surface locating at an imagewise exposing position moves into the casing of the developing device before the electric potential V1 of the portion is lowered to the half of V1 (V1/2). A pre-transfer exposing device/transfer device and pre-cleaning exposing device/cleaning device all operate such that the potential on the photoreceptor moves into the casings of the transfer device or cleaning device before the potential is lowered to half its value.

REFERENCES:
patent: 4529292 (1985-07-01), Ohseto
patent: 4623243 (1986-11-01), Iijima et al.
patent: 4669855 (1987-06-01), Iwahashi
patent: 4945389 (1990-07-01), Usui et al.
patent: 5303009 (1994-04-01), Nishizawa
patent: 5541722 (1996-07-01), Ikeda et al.
patent: 5697025 (1997-12-01), Tokimatsu et al.
patent: 5701560 (1997-12-01), Tsujita et al.

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