Fixing device and image forming apparatus incorporating the...

Details Fixing device and image forming apparatus incorporating the... Fixing device and image forming apparatus incorporating the...

2006-09-05

2006-09-05

Ngo, Hoang (Department: 2852)

Electrophotography

Image formation

Fixing

C219S216000, C399S329000

Reexamination Certificate

active

07103307

ABSTRACT:
In a fixing device for fixing a toner image onto a recording medium, a heating roller is provided with an elastic layer formed on an outer periphery thereof. An endless belt is adapted to be circulated. A press member presses a part of the endless belt against the heating roller so as to deform the elastic layer, thereby forming a fixing nip portion through which the recording medium it passed. A guide member has a slope portion extended so as to close to a tangential line defined at a press contact position between the heating roller and the press member, as is being away from the exit of the fixing nip portion. A fixing pressure generated at the exit of the fixing nip portion is greater than a fixing pressure generated at an entrance of the fixing nip portion.

REFERENCES:
patent: 4905049 (1990-02-01), Bickerstaff et al.
patent: 6928257 (2005-08-01), Ogiso et al.
patent: 53-117249 (1978-09-01), None
patent: 02-061030 (1992-12-01), None

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