Patent ID: 7792474

Claim:
An image forming apparatus which forms an image on a sheet, comprising: an image forming section that forms a toner image on a plurality of sheet types; a fixing unit in which the toner image formed by the image forming section is fixed on the plurality of sheet types by a fixing member; a memory section that stores characteristics of the plurality of sheet types; and a control section that controls conveyance of the plurality of sheet types, wherein the control section has a cleaning mode in which after the sheet is conveyed to the image forming section from a sheet-supplying tray, the control section controls the image forming section not to form the toner image on the sheet, and controls the sheet to be conveyed to the fixing unit, after which the control section controls the cleaning mode to clean the fixing member by removing toner sticking to the fixing member, and when sheet jamming is caused at the fixing unit while the cleaning mode is practiced, the control section stores at least one characteristic of a sheet that causes the first sheet type jamming into the memory section, and when a succeeding cleaning mode is practiced, the control section prohibits selection of the first sheet type having the characteristic stored in the memory section, and selects a second sheet type having other characteristics to practice the cleaning mode.