Patent ID: 8135292
Filing Date: 2012-03-13
Classification: G03G

Abstract:
1. A fixing device comprising: a pressing member; a belt member which rotates in contact with the pressing member and forms a nip with the pressing member; a first roller member and a second roller member to guide the rotation of the belt member; a heating member mounted in the second roller member to heat the belt member, the heating member comprising at least two heaters to respectively heat at least two areas on the belt member corresponding to at least two width dimensions substantially parallel to a rotational axis of the one of the second roller member; and a sensor member to detect the surface temperature of the belt member so as to prevent a power source from supplying power used to generate heat to the first heater and/or second heater when the belt member is overheated; wherein the at least two heaters comprise a first heater to heat a central portion of the second roller member and a second heater to heat opposite ends of the second roller member and the first heater and the second heater are disposed in a manner that the end portions of the heaters are adjacent to each other, wherein, the sensor member is disposed at a region where the end portion of the first heater is adjacent to the end portion of the second heater.