Patent ID: 6941088

Claim:
A toner fixing device, comprising: a fixing member; an opposite member formed opposite said fixing member so as to form a nip between said fixing member and said opposite member; a main power source; an electric double-layer capacitor; a charger connecting said electric double-layer capacitor to said main power source; a fixing member heater connected to said electric double-layer capacitor; a switch disposed between said electric double-layer capacitor and said fixing member heater, said switch configured to controllably connect and disconnect said electric double-layer capacitor and said fixing member heater; a fixing member temperature sensor in contact with said fixing member; and a controller configured to control said switch such that said electric double-layer capacitor connects to or disconnects from said heater based on comparing a temperature sensed by said fixing member temperature sensor to a temperature threshold value while plural recording medium continuously pass said nip, wherein a toner image is fixed onto a recording medium passing through said nip.