| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fixing device having a short rise time and good heating efficiency by enabling temperature control stabilizing a fixing member. <P>SOLUTION: Electric power is supplied through an inverter circuit 31 to a heating element 13 heating the fixing member 11 from the outside side. A control circuit 34 continuously changes the electric power supplied to the heating element 13 by PWM-controlling a switching element 32 on the basis of detection signals from a temperature detection element 16 provided on the fixing member 11 and a recording material passage detection element 17. Thereby even in an outside heating system the fixing member 11 can be prevented from being suddenly a set temperature or higher, can prevent quick temperature lowering, and is stably maintained at the set temperature. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
