Patent ID: 9436141
Filing Date: 2016-09-06
CPC Classification: B65G,G03G

Claim Text:
1. A fixing device comprising: a fixing belt configured to be rotatable; a pressuring member configured to be rotatable and to come into pressure contact with the fixing belt so as to form a fixing nip; a heat source configured to heat the fixing belt; a pressing member configured to press the fixing belt to a side of the pressuring member; a temperature sensor configured to detect a temperature of the fixing belt; and a controller into which the temperature detected by the temperature sensor is inputted, wherein the fixing belt includes a base material layer and an elastic layer provided around the base material layer, wherein a detected region whose temperature is detected by the temperature sensor is formed in the fixing belt, and the elastic layer of the detected region is provided with a hole in a part thereof in a circumferential direction, and wherein the controller judges that the fixing belt is rotating in a case where the temperature detected by the temperature sensor alternately increases and decreases in a state that the heat source is heating the fixing belt, and judges that the fixing belt is not rotating in a case where the temperature detected by the temperature sensor does not alternately increase and decrease in the state that the heat source is heating the fixing belt, the fixing device further comprising a drive source configured to rotate the fixing belt, wherein the controller controls the drive source such that a rotation of the fixing belt is stopped in a position where the hole of the elastic layer of the detected region faces the temperature sensor.