Image forming apparatus having fixing device with endless...

Details Image forming apparatus having fixing device with endless... Image forming apparatus having fixing device with endless...

2008-04-15

2008-04-15

Ngo, Hoang (Department: 2852)

Electrophotography

Image formation

Fixing

C399S045000, C399S067000

Reexamination Certificate

active

11284926

ABSTRACT:
An image forming apparatus including: an image forming section to form a toner image on a recording sheet; a fixing device which has a fixing roller, an endless fixing belt trained with a tension about at least two rollers including the fixing roller, a heating device to heat the endless fixing belt, and a pressure roller to press the fixing roller through the endless belt, wherein the fixing device fixes the toner image on the recording sheet at a nip portion formed between the heated endless fixing belt and the pressure roller; a tension changing section to change the tension of the endless fixing belt; a recording sheet discriminating section to discriminate a type of recording sheet to be used; and a controller controling to make the tension changing section to change the tension of the fixing belt corresponding to the type of recording sheet.

REFERENCES:
patent: 2004/0042809 (2004-03-01), Fuma et al.
patent: 2003-005566 (2003-01-01), None
patent: 2003-122172 (2003-04-01), None
patent: 2003-330309 (2003-11-01), None
patent: 2003-330310 (2003-11-01), None

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