Electrophotography – Image formation – Fixing
Reexamination Certificate
2007-06-21
2010-06-15
Gray, David M (Department: 2852)
Electrophotography
Image formation
Fixing
Reexamination Certificate
active
07738828
ABSTRACT:
A fixing device having at least a cylindrical base material, an elastic layer disposed on the base material, and a surface layer disposed on the elastic layer is provided. The cylindrical base material has a variation in thickness within about ±10% when the cylindrical base material is in an endless belt shape having flexibility, or within a variation in outer diameter within about ±0.5% when the cylindrical base material is in a circular cylinder tube shape having rigidity. The elastic layer has a variation in thickness within about ±5%. The surface layer has a variation, along the circumferential direction of the base material, in thickness of the surface within about ±5% and with a surface elongation percentage which increases from a center portion toward both end portions in the widthwise direction of the base material. A fixing apparatus and an image forming apparatus having the fixing device are also provided.
REFERENCES:
patent: 5319430 (1994-06-01), DeBolt et al.
patent: 5378525 (1995-01-01), Yamamoto et al.
patent: 2004/0101334 (2004-05-01), Tatematsu et al.
patent: B2 6-42112 (1994-06-01), None
patent: A 9-152803 (1997-06-01), None
Curran Gregory H
Fuji 'Xerox Co., Ltd.
Gray David M
Oliff & Berridg,e PLC
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