Patent ID: 8509642

Claim:
A fixing apparatus, comprising: a hot roller; a fixing roller; a fixing belt that extends between the fixing roller and the hot roller and revolves, and is heated by the hot roller; a pressure roller that is pressed against the fixing roller via the fixing belt, and forms a nip region through which a recording sheet passes between the pressure roller and the fixing belt; at least one non-contact temperature sensor that detects a temperature of the fixing belt; and a control portion that controls a temperature of the hot roller based on the temperature detected by the non-contact temperature sensor, wherein a first temperature detection portion is set in a region where the fixing belt is in contact with a circumferential surface of the hot roller, a second temperature detection portion is set in a region that is on a downstream side in a revolution direction of the fixing belt relative to a separation point at which the fixing belt that has moved along the circumferential surface of the hot roller separates from the circumferential surface of the hot roller, and that is on an upstream side in the revolution direction of the fixing belt relative to the nip region, the at least one non-contact temperature sensor detects temperatures of the fixing belt at the first temperature detection portion and the second temperature detection portion; and wherein the first temperature detection portion and the second temperature detection portion are adjacent to each other at the separation point.