Patent ID: 8750756
Filing Date: 2014-06-10
Classification: G03G

Abstract:
1. An image forming apparatus equipped with an induction heating fixing system, comprising: a first housing which accommodates a member for performing a fixing processing; a second housing which accommodates an image forming section for forming an image onto a sheet, the second housing being mounted with the first housing thereon; a first roller having a first rotary shaft, and rotatably supported by the first housing in a state that the first rotary shaft is positionally immovable; a second roller having a second rotary shaft, rotatably supported by the first housing in a state that the second rotary shaft is positionally movable, and forming, with the first roller, a fixing nip portion in which the fixing processing is applied to the sheet; a nipping pressure adjusting mechanism which changes a posture of the second roller between a first posture that the second roller is pressingly contacted with the first roller with a first pressure, and a second posture that the second roller is pressingly contacted with the first roller with a second pressure lower than the first pressure, the second pressure being set lower than the first pressure by moving a position of the second rotary shaft from the first posture; an induction heating unit mounted on the second housing for generating heat necessary for the fixing processing; a retaining mechanism which retains relative positions between the second roller and the induction heating unit both in the case where the second roller is in the first posture and in the second posture; and a driving mechanism which gives a rotational driving force to the first roller.