Heating roller assembly for image forming apparatus

Details Heating roller assembly for image forming apparatus Heating roller assembly for image forming apparatus

2006-04-18

2009-08-04

Brase, Sandra L (Department: 2852)

Electrophotography

Image formation

Fixing

C399S330000

Reexamination Certificate

active

07570913

ABSTRACT:
A heating roller assembly for an image forming apparatus. The heating roller assembly includes a heating roller pipe having a heating layer around which a coil is wound. The heating layer has a coil winding structure such that first portions ‘A’ formed adjacent to bearings for rotatably supporting the heat roller pipe have a lower thermal temperature than that of second portions ‘B’ formed adjacent to the first portions A. The first portions A serve as a heat absorber to minimize the fusing heat loss at the beginning of a fusing process, and even if the fusing process continues for a long time, the heat absorber can prevent the opposite ends of the heating roller, where the bearings are disposed, from overheating. Accordingly, a more accurate pickup operation is achieved and a stable quality of image can be guaranteed.

REFERENCES:
patent: 4585325 (1986-04-01), Euler
patent: 6858820 (2005-02-01), Miura
patent: 7335863 (2008-02-01), Kikuchi et al.
patent: 2004/0238531 (2004-12-01), Kikuchi et al.
patent: 2000-29332 (2000-01-01), None
patent: 2003-329030 (2003-11-01), None
patent: 2004-170739 (2004-06-01), None

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