Electrophotography – Control of electrophotography process – Control of fixing
Reexamination Certificate
2009-01-05
2011-12-06
Gray, David (Department: 2852)
Electrophotography
Control of electrophotography process
Control of fixing
Reexamination Certificate
active
08073351
ABSTRACT:
An image forming device includes: a fixing portion including a nip that is formed between a heat roller and a back-up roller pressurized by a pressurizing mechanism and holds and conveys a toner-bearing sheet; a pressure switching mechanism for changing a pressurizing force of the pressurizing mechanism; and a sheet detecting portion for detecting a sheet conveyed to the fixing portion. The sheet detecting portion changes a state of sheet detection by the sheet detecting portion in tandem to operation of the pressure switching mechanism. The image forming device includes a pressurization state determining portion for determining a state of pressurization of the pressurizing mechanism on the basis of an output of the sheet detecting portion for a sheet non-passing time, and a pressurization state display portion for displaying the pressurization state determined by the pressurization state determining portion.
REFERENCES:
patent: 6647216 (2003-11-01), Tanaka
patent: 6-337612 (1994-12-01), None
patent: 2000221818 (2000-08-01), None
Gray David
Jordan and Hamburg LLP
Kyocera Mita Corporation
Villaluna Erika J
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