Patent ID: 7283763

Claim:
A fixing apparatus comprising: a first rotatable member having an endless configuration; a second rotatable member in pressure contact with said first rotatable member, said second rotatable member causing a recording material bearing an image to be nipped and conveyed at a pressure contact portion between said first and second rotatable members; a temperature raising portion adapted to receive supply of electric power and raise temperature of a local portion of said first rotatable member; a temperature detecting element adapted to detect temperature of a location different from said local portion where temperature is raised by said temperature raising portion with respect to a rotational direction of said first rotatable member; a control portion adapted to control electric power to be supplied to said temperature raising portion; and a power supply voltage detecting portion adapted to detect a power supply voltage, wherein said control portion controls electric power to be supplied to said temperature raising portion by feedback-control on the basis of a temperature detected by said temperature detecting element, and wherein when said fixing apparatus is started up said control portion controls temporarily electric power to be supplied to said temperature raising portion on the basis of detection result by said power supply voltage detecting portion in timing close to a timing when the temperature detected by said temperature detecting element reaches a target temperature or in timing close to a timing when a recording material rushes in said pressure contact portion.