Image forming apparatus

Electrophotography – Control of electrophotography process – Control of fixing

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G03G 1520

Patent

active

059180870

ABSTRACT:
An image forming apparatus including a fixing roller and a pressure roller in which a temperature of the fixing roller and/or the pressure roller is changed differently depending on an operation mode. In particular, the temperature of the fixing roller and/or pressure roller of an operation of a non-full color mode is changed to a lesser degree than that of a full color mode operation. In another embodiment of the present invention, the temperature of the fixing roller is set to an appropriate value when an environment temperature sensor is not working properly, to produce high quality images. In yet another embodiment according to the present invention, the temperature of the fixing roller is set to an appropriate value, when an image forming apparatus is turned off for a predetermined period of time, to produce high quality images.

REFERENCES:
patent: 4373801 (1983-02-01), Itoh
patent: 4549803 (1985-10-01), Ohno et al.
patent: 4977431 (1990-12-01), Fuji
patent: 5001519 (1991-03-01), Saito
patent: 5049906 (1991-09-01), Kobayashi et al.
patent: 5073801 (1991-12-01), Haneda et al.
patent: 5512992 (1996-04-01), Kim et al.
patent: 5568229 (1996-10-01), Szlucha

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