Image forming apparatus having a charging member with plural cha

Details Image forming apparatus having a charging member with plural cha Image forming apparatus having a charging member with plural cha

1998-02-20

1999-11-23

Braun, Fred L.

Electrophotography

Control of electrophotography process

Responsive to copy media characteristic

399 50, 399176, G03G 1502, G03G 2100

Patent

active

059915579

ABSTRACT:
An image forming apparatus includes a photosensitive body, a charging member for charging the photosensitive body, voltage applicator for applying a voltage including an AC component to the charging member, exposing device for image exposing on the photosensitive body charged by the charging member to form an electrostatic image, and developer for developing the electrostatic image, wherein the image forming apparatus can select from a first mode having low tone reproductivity and a second mode having tone reproductivity higher than that of the first mode, and wherein, when the second mode is selected, the voltage applicator applies a voltage having a frequency of the AC component higher than that when the first mode is selected.

REFERENCES:
patent: 5412455 (1995-05-01), Ono et al.
patent: 5420671 (1995-05-01), Kisu et al.
patent: 5444519 (1995-08-01), Motoyama et al.
patent: 5512982 (1996-04-01), Takahashi et al.
patent: 5734947 (1998-03-01), Tanabe

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