Fixing device in image forming device

Details Fixing device in image forming device Fixing device in image forming device

1998-07-20

2000-01-04

Royer, William

Electrophotography

Control of electrophotography process

Control of fixing

399 70, 219216, 219469, 432 60, G03G 1520

Patent

active

060119381

ABSTRACT:
To improve the fixing ability in the fixing device, and simultaneously prevent hot offset occurring during continuous fixing process. In the interior of a cored bar of a heat roll is mounted a heater lamp, and by controlling the power supplied to said heater lamp, heat roll is maintained at a first set temperature enabling heat fix. To this heater lamp is pressed a pressurization roll formed by covering a cover layer to a cored bar, which forms a fixing device. The heat roll is controlled and maintained at the first set temperature T.sub.1 at the initial fixing process, and when performing a continuous fixing process, it is switched and controlled to a second set temperature T.sub.2 lower than the first set temperature but enabling fixing. Thereby, the fixing ability could be maintained well, preventing hot offset.

REFERENCES:
patent: 4642448 (1987-02-01), Shigemura et al.
patent: 4878092 (1989-10-01), Arai
patent: 5528346 (1996-06-01), Kim et al.
patent: 5682577 (1997-10-01), Kiyoi
patent: 5708920 (1998-01-01), Ohnishi et al.
patent: 5742870 (1998-04-01), Hwang

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