Image forming apparatus

Details Image forming apparatus Image forming apparatus

2010-03-23

2010-11-02

Chen, Sophia S (Department: 2852)

Electrophotography

Control of electrophotography process

Control of developing

C399S270000, C430S111310

Reexamination Certificate

active

07826758

ABSTRACT:
An image forming apparatus includes a photosensitive drum to which an electrostatic image is formed and a developing sleeve carrying a developer including toner carrier. An alternating voltage is applied to the sleeve to form an alternating electric field between the sleeve and the drum to develop the electrostatic image with the developer. A relation |K1|<|K2| is satisfied, where K1: a slope at an electric field intensity Ed=|(Vp2−VL)/D|, K2: a slope at an electric field intensity Eb=|(Vp1−VL)/D|, VL: a potential [V] of the electrostatic image at which a maximum density is obtained, Vp1: a peak potential [V] that provides a potential difference to move the toner toward the drum, Vp2: a peak potential [V] that provides a potential difference to move the toner toward the sleeve, and D: a closest distance [m] between the drum and the sleeve.

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