Image forming apparatus

Details Image forming apparatus Image forming apparatus

2008-07-01

2008-07-01

Ngo, Hoang (Department: 2852)

Electrophotography

Image formation

Development

C399S281000, C399S284000, C430S108100

Reexamination Certificate

active

07395017

ABSTRACT:
An image forming apparatus prints an image on paper. A developing roller supplies toner to an electrostatic latent image on a photoconductive drum to form a toner image. A developing blade forms a thin layer of toner on the developing roller. A transfer unit transfers the toner image onto the paper. A fixing unit fixes the toner image on the paper into a permanent image. The developing roller rotates at a circumferential speed from 150 to 250 mm/sec. The developing blade applies a line pressure in the range of 34-68 gf/cm to the developing roller. The toner has a glass transition temperature Tg from 45 to 77□, a softening temperature from 58 to 98□, a flow-beginning temperature Ts from 78 to 138□, and a melting point Tm from 105 to 189□. Tg, Ts, Tfb and Tm are related such that Tm>Tfb>Ts.

REFERENCES:
patent: 5389487 (1995-02-01), Kawakami et al.
patent: 6821697 (2004-11-01), Takayanagi et al.
patent: 6858365 (2005-02-01), Sawada et al.
patent: 11-174732 (1999-07-01), None
patent: 2005-148097 (2005-06-01), None

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