Iwatsu Electric Company Ltd.

Yuuichi Nakagawa

Norio Kokaji

Michiaki Yokozawa

Seiichi Hayashi

Mamoru Nishiguchi

The present invention is aimed at providing a control system for a thermal fixing apparatus having an excellent fixing ability even at an initial stage of a copying process when applied to a high speed copying machine and ensuring a longer life of a surface layer member of the roller, while maintaining the economical benefit derived from the provision of a heater only in a heat roller. The fixing apparatus includes a heater roller 101 and a press roller 102. At least one of the rollers is driven by a motor 103 while in contact with the other so that both rollers are rotated together. A surface temperature of the heater roller 101 is detected by a thermometer 104 and is used for controlling a heating level of a heater 106 by a controller 105. A standby stage controller 110 stops the rotation of the motor 103 if it is determined that the surface temperature of the press roller detected by a thermometer 107 is higher than the upper limit temperature, and outputs a command for rotating the motor 103 if it is determined that the surface temperature of the press roller is lower than the lower limit temperature.

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Hino, Japan

Yuuichi Nakagawa