Image fixing device of an image forming apparatus

Details Image fixing device of an image forming apparatus Image fixing device of an image forming apparatus

2005-08-31

2008-08-19

Ngo, Hoang (Department: 2852)

Electrophotography

Image formation

Fixing

C219S619000, C399S336000

Reexamination Certificate

active

07415234

ABSTRACT:
A fixing device of an image forming apparatus includes a fixing roller rotatably mounted on a moving path of a printing medium having a toner image transferred thereon to fuse the toner image on the printing medium, a heater mounted in the fixing roller to generate a magnetic field by applied voltage, thus heating the fixing roller, and at least one magnetic core disposed around the fixing roller to concentrate, onto the fixing roller, the magnetic field generated by driving the heater. Accordingly, a density difference of the magnetic field generated by the heater is minimized by disposing the at least one magnetic core around the fixing rollers, thus enabling a uniform fixing temperature.

REFERENCES:
patent: 7113736 (2006-09-01), Kikuchi et al.
patent: 2002/0190060 (2002-12-01), Imai et al.
patent: 2004/0253027 (2004-12-01), Kato et al.
patent: 1493939 (2004-05-01), None
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patent: 2001-282025 (2001-10-01), None
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Chinese Office Action for corresponding Chinese Patent Application No. 2005101038416 dated Dec. 7, 2007.
Korean Patent Office Action for corresponding Korean Patent Application No. 10-2004-0072836 dated Mar. 23, 2006.

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