Electrophotography – Control of electrophotography process – Control of fixing
Reexamination Certificate
2006-10-10
2006-10-10
Ngo, Hoang (Department: 2852)
Electrophotography
Control of electrophotography process
Control of fixing
C399S068000, C399S069000, C399S043000
Reexamination Certificate
active
07120370
ABSTRACT:
In a duplex printing or a simplex printing, upper and lower rollers of a fixing unit are separated from each other or stop rotating during a period after the fixing operation of the first side of a recording medium (or a preceding recording medium) and before the fixing operation of the second side of the recording medium (or a subsequent recording medium). With such an arrangement, it is possible to prevent the excessive heating of the lower roller, and thereby to prevent the degradation of the printed image.
REFERENCES:
patent: 5493380 (1996-02-01), Saitou et al.
patent: 6782231 (2004-08-01), Fuma et al.
patent: 6904257 (2005-06-01), Tomatsu
patent: 10063132 (1998-03-01), None
patent: 2000-338817 (2000-12-01), None
Akin Gump Strauss Hauer & Feld & LLP
Oki Data Corporation
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