Patent ID: 9098038
Filing Date: 2015-08-04
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a toner image forming unit that forms a toner image, a fixing device including a fixing member that fixes toner to a recording medium, a pressure member that conveys the recording medium in such a manner that the recoding medium is sandwiched between the fixing member and the pressure member, a driving unit that rotates the pressure member to allow the fixing member to perform slave rotation, and a number-of-revolutions sensing unit that senses the number of revolutions of the fixing member; a number-of-revolutions determining unit that determines, based on the number of revolutions of the fixing member sensed by the number-of-revolutions sensing unit, the number of revolutions of the driving unit; a stopping unit that stops the driving unit when the number of revolutions determined by the number-of-revolutions determining unit is not equal to a specific number of revolutions, a number-of-revolutions decrease rate calculating unit that calculates, based on a first number of revolutions of the driving unit determined by the number-of-revolutions determining unit and a second number of revolutions of the driving unit determined after a specific time has passed, the decrease rate of the number of revolutions of the driving unit; and a separating unit that separates the pressure member from the fixing member when the decrease rate of the number of revolutions calculated by the number-of-revolutions decrease rate calculating unit is greater than a specific decrease rate of the number of revolutions of the driving unit.