Electrophotography – Image formation – Fixing
Reexamination Certificate
2007-11-20
2007-11-20
Gray, David M. (Department: 2852)
Electrophotography
Image formation
Fixing
C399S330000, C399S331000, C399S332000
Reexamination Certificate
active
11229419
ABSTRACT:
A fixer (heater) includes a heat roller and a pressure roller pressing each other. The fixer heats a heated material by passing the heated material through a press region where the heat roller and the pressure roller meet. The fixer further includes an external heat roller heating the pressure roller from outside the pressure roller. A transit time taken for any given point on the heated material to pass through the press region is less than or equal to 2.3×10−2sec. The surface temperature, T1(° C.), of the heat roller and the surface temperature, T2(° C.), of the pressure roller satisfy T1-T2≦100 (° C.), and preferably satisfy T1-T2≦70 (° C.). The load on the heat roller is reduced, and so is the power consumption.
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Kagawa Toshiaki
Kida Hiroshi
Yamanaka Takashi
Conlin David G.
Edwards Angell Palmer & & Dodge LLP
Gray David M.
Neuner George W.
Sharp Kabushiki Kaisha
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