Patent ID: 9239554
Filing Date: 2016-01-19
CPC Classification: G03G

Claim Text:
1. An image forming apparatus comprising: an image forming unit configured to form an image on a sheet; a heating member configured to heat the sheet conveyed from the image forming unit for fixing the image onto the sheet; a temperature detection unit configured to detect a temperature of a predetermined position of a heated region of the heating member; a controller configured to control the heating member based on the temperature detected by the temperature detection unit; a heating region control unit configured to control the heated region of the heating member based on a width of the sheet in a width direction orthogonal to a conveyance direction in which the sheet is conveyed, wherein the heating region control unit controls a first heated region if the width of the sheet is equal to or narrower than a predetermined width, wherein the heating region control unit controls a second heated region if the width of the sheet is wider than the predetermined width, wherein the first heated region includes the predetermined position, and wherein the second heated region in the width direction includes the first heated region and an outer heated region outside the first heated region; a cooling unit configured to cool the heated region:, a coil; a plurality of cores disposed along the width direction; and a moving unit configured to move each of the plurality of cores to a first position close to the coil or a second position separated from the coil, wherein if the heating region control unit changes the heated region from the first heated region to the second heated region, the cooling unit cools the predetermined position, wherein the heating member generates heat by use of magnetic flux generated by the coil, and wherein the moving unit moves each of the plurality of cores based on a width of the heated region.