Image forming apparatus capable of changing the surface potentia

Details Image forming apparatus capable of changing the surface potentia Image forming apparatus capable of changing the surface potentia

1995-04-17

1996-10-15

Pendegrass, Joan H.

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Light boxes

347140, 355219, G03G 1502

Patent

active

055659632

ABSTRACT:
An image forming apparatus includes a rotatable photosensitive member including a conductive base and a photosensitive layer located on a surface of the base; a charging device located in the vicinity of the photosensitive member for charging the photosensitive layer; a charge removing device located upstream with respect to the charging device in a rotation direction of the photosensitive member for radiating light toward the photosensitive layer prior to charging performed by the charging device to uniformize a surface potential of the photosensitive layer; a light radiation device for radiating light to a charging area of the photosensitive layer in the state of being charged by the charging device and for adjusting the amount of the light to be radiated; an exposing device for radiating light corresponding to an image toward the photosensitive layer in the state of being charged; a developing device located downstream with respect to the exposing device in the rotation direction of the photosensitive member; a change detection device for detecting a change in at least one of a charging potential of the photosensitive layer and a sensitivity of the photosensitive layer; and a compensation device for compensating for the change by adjusting the amount of the light radiated toward the charging area by the light radiation device based on results obtained by the change detection device.

REFERENCES:
patent: 4248519 (1981-02-01), Urso
patent: 4350435 (1982-09-01), Fiske et al.
patent: 4542981 (1985-09-01), Anzai et al.
patent: 5164776 (1992-11-01), Oresick et al.
patent: 5331379 (1994-07-01), Yoneda et al.
patent: 5392098 (1995-02-01), Ehara et al.
Search Report for European Appl. 95302745.5, mailed Sep. 21, 1995.

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