Image forming apparatus and elastic roller

Details Image forming apparatus and elastic roller Image forming apparatus and elastic roller

2007-02-27

2007-02-27

Lee, Susan (Department: 2852)

Electrophotography

Image formation

Transfer

Reexamination Certificate

active

10871323

ABSTRACT:
A developing agent image is formed by adhering a developing agent onto an electrostatic latent image formed on an image holding material and transferred onto an image forming medium, thereby forming an image. A resistance value ratio of a resistance value of a transfer member arranged so as to face the image holding material when a voltage 1000 V is applied to the transfer member to a resistance value when a voltage 500 V is applied is set to (0.5≦ratio≦0.89). Likewise, a resistance value ratio of a resistance value when 2000 V is applied to that when 1000 V is applied is set to (0.3≦ratio≦0.88). Since a just enough transfer current can be optimally generated, image quality can be improved and an image forming apparatus which does not need a large-capacity power source and an elastic roller are provided.

REFERENCES:
patent: 5572304 (1996-11-01), Seto et al.
patent: 09-212012 (1997-08-01), None
patent: 11-231610 (1999-08-01), None

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