Developing device and image forming apparatus

Details Developing device and image forming apparatus Developing device and image forming apparatus

2008-12-10

2010-11-02

Chen, Sophia S (Department: 2852)

Electrophotography

Image formation

Development

C399S279000, C399S286000

Reexamination Certificate

active

07826782

ABSTRACT:
A developing device is provided for visualizing an electrostatic latent image previously formed on the surface of an image carrier as a toner image. The developing device has a developing roller placed at a position facing the image carrier, carrying a toner on the surface thereof, conveying the toner and flying the conveyed toner onto the surface of the image carrier; and a resin layer coated on the surface of the developing roller. The absolute value of the difference in charge between the toners in the upper and lower layers of the toner layer formed on the developing roller as the toner carried on the developing roller is 6 μC/g or less.

REFERENCES:
patent: 4508052 (1985-04-01), Kohyama
patent: 5436102 (1995-07-01), Kubo et al.
patent: 2006/0222982 (2006-10-01), Fujikawa
patent: 2008/0069600 (2008-03-01), Nakamura et al.
patent: 2-79062 (1990-03-01), None

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