Image forming apparatus having an improved system for removing r

Details Image forming apparatus having an improved system for removing r Image forming apparatus having an improved system for removing r

1997-12-15

1999-08-10

Lee, S.

Electrophotography

Image formation

Charging

399150, G03G 1502, G03G 1524

Patent

active

059372451

ABSTRACT:
An image forming apparatus includes an image bearing member, latent image forming device for forming an electrostatic image on the image bearing member, the latent image forming device having a charging member contactable to the image bearing member to electrically charge the image bearing member, and the charging member being supplied with a voltage which includes an oscillation component, a developing device for developing the electrostatic latent image with toner into a toner image, the developing device being capable of removing residual toner from the image bearing member, a transfer device for transferring the toner image from the image bearing member onto a transfer material, and a frequency control device for controlling a frequency of the oscillation component so that the frequency is higher when at least a part of such an area of the image bearing member as is going to be a non-image area is charged than when such an area of the image bearing member as is going to be an image area is charged.

REFERENCES:
patent: 5412455 (1995-05-01), Ono et al.
patent: 5561502 (1996-10-01), Hirai et al.
patent: 5596393 (1997-01-01), Kobayashi et al.
patent: 5600413 (1997-02-01), Kimura
patent: 5666606 (1997-09-01), Okano et al.
patent: 5689777 (1997-11-01), Yamamoto et al.
patent: 5717979 (1998-02-01), Senba et al.

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