Electrophotography – Image formation – Fixing
Patent
1996-04-05
1999-03-02
Lee, S.
Electrophotography
Image formation
Fixing
219216, 219470, 399 69, G03G 520
Patent
active
RE0361240
ABSTRACT:
includes a fixing roller in which a heater is disposed, a pressing roller urged against the fixing roller, heat pipes extending in either one of the fixing and pressing rollers in a longitudinal direction control.!. and controlling a temperature of the fixing roller. In a typical embodiment, the heat pipes are disposed in the fixing passage area, through which a record sheet passes, and through a which no record sheet passes and the temperature detection/control device has a temperature detection device for detecting a temperature of the non-passage area. The temperature detection/control device is provided with a temperature regulating device for interrupting electricity to the heater when the fixing roller exceeds a predetermined temperature. In another embodiment, at least one of the heat pipes is provided in the fixing roller in parallel with an axis of the fixing roller, and a core of the fixing roller is produced by extrusion.
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Arai Atsushi
Fukuchi Yutaka
Higaya Toshiaki
Okamoto Jun
Sato Masahiko
Lee S.
Ricoh & Company, Ltd.
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