Patent ID: 9329540
Filing Date: 2016-05-03
CPC Classification: G03G

Claim Text:
1. A fixing device for fixing a toner on a recording medium, comprising: a first rotatory body in the form of an endless belt, the first rotatory body being rotatable in a circumferential direction thereof; a heater configured to heat the first rotatory body; a pressure receiving member disposed within the first rotatory body and configured to be in contact with an inner circumferential surface of the first rotatory body; a supporting member disposed within the first rotatory body and configured to support the pressure receiving member; a second rotatory body disposed opposite to the pressure receiving member with the first rotatory body therebetween, the second rotatory body being rotatable, the second rotatory body and the pressure receiving member providing a fixing nip therebetween where the recording medium becomes sandwiched; a position detection section configured to detect a position of an outer circumferential surface of the first rotatory body in terms of a radial direction of the first rotatory body; and a determination section configured to determine a state of rotation of the first rotatory body based on a result of detection by the position detection section, wherein the position detection section includes a first position detection member located at a location upstream of the fixing nip in terms of a rotation direction of the first rotatory body and a second position detection member located at a location downstream of the fixing nip in terms of the rotation direction.