Patent ID: 8639143

Claim:
A fixing device comprising: a fixing roll that is rotatable; a belt member that is stretched over the fixing roll; a pressurizing roll that pressurizes the fixing roll across the belt member; a belt pressing member that presses an outer surface of the belt member against the pressurizing roll from inside of the belt member on a downstream side at a pressure-contact position between the fixing roll and the pressurizing roll; a controller that decreases a difference between a passage time per unit area of a leading end region of a recording medium and a passage time per unit area of a succeeding region of the recording medium to pass a pressure-contact portion between the fixing roll, the belt pressing member, and the pressurizing roll; and an oil supplying member that supplies an oil to an inner face of the belt member, wherein the controller includes an oil quantity adjusting unit that adjusts a quantity of the oil so as not to exceed a reference value.