Electrophotography – Image formation – Fixing
Reexamination Certificate
2007-10-30
2007-10-30
Gray, David M. (Department: 2852)
Electrophotography
Image formation
Fixing
C399S328000
Reexamination Certificate
active
11412095
ABSTRACT:
An image fixing unit includes a heating roller, a pressing roller forming a first fixing nip by contact with an outer surface of the heating roller, and a fixing nip expansion unit forming a second fixing nip by contact with the heating roller. The fixing nip expansion unit includes an auxiliary pressing member mounted at one side of the pressing roller and forming the second fixing nip by contact with the outer surface of the heating roller, an endless belt moving along a caterpillar track surrounding outer circumferences of the heating roller and the auxiliary pressing member, and a resilient unit biasing the heating roller and the auxiliary pressing member resiliently toward the heating roller.
REFERENCES:
patent: 2003/0103788 (2003-06-01), Yura et al.
patent: 10-207277 (1998-08-01), None
patent: 2003-280439 (2003-10-01), None
patent: 2004-077871 (2004-03-01), None
patent: 2004-093759 (2004-03-01), None
patent: 2005-115026 (2005-04-01), None
Kim Hwan-guem
Kim Jeonghwa
Samsung Electronics Co,. Ltd.
Stein, McEwen & Bui LLP
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