Patent ID: 8019247
Filing Date: 2011-09-13
Classification: G03G

Abstract:
1. A fusing device, comprising: a fusing part; a pressing part rotatably pressed against the fusing part to form a fusing nip for fusing a toner image onto a sheet; a capacitor; a center heater including a heat generating portion configured to heat a center portion in the width direction of the fusing part; an edge heater including heat generating portions configured to heat edge portions in the width direction of the fusing part; an auxiliary heater configured to heat the fusing part; and a control unit to continuously turn off the edge heater and to turn on the center heater and the auxiliary heater to heat the fusing part during a fusing process of one or more small-size sheets having a width less than that of the heat generating portion of the center heater; wherein the control unit turns on the edge heater to heat the fusing part when the capacitor stops discharging electricity during a consecutive fusing process of a plurality of the small-size sheets.