Fixing apparatus and image forming apparatus

A fixing apparatus for feeding a sheet that is unfixed through a nip formed between a heating member and a pressurizing member to thermally fix the sheet, the fixing apparatus comprising

• a cooler that cools the pressurizing member, wherein
• when a fixing job is performed on a sheet whose sheet width is a second width larger than a first width, after a fixing job is completed on a sheet whose sheet width in an orthogonal direction to a sheet feeding direction is the first width,
• the cooler cools a difference region in which a first sheet feeding region of the pressurizing member through which the sheet having the first width is fed and a second sheet feeding region through which the sheet having the second width is fed are not overlapped with each other, with a cooling power stronger than that of a region corresponding to the first sheet feeding region,
• further comprising a difference region temperature detector that detects a temperature of the difference region of the pressurizing member, wherein
• the cooler performs cooling so that a cooling power for the difference region is greater than the cooling power for a non-sheet feeding region of the sheet having the second width until the temperature detected by the difference region temperature detector reaches a predetermined temperature, the non-sheet feeding region comprising a portion of the pressurizing member that extends beyond the second width.

A fixing apparatus for feeding a sheet that is unfixed through a nip formed between a heating member and a pressurizing member to thermally fix the sheet, the fixing apparatus comprising

• a cooler that cools the pressurizing member, wherein
• when a fixing job is performed on a sheet whose sheet width is a second width lamer than a first width, after a fixing job is completed on a sheet whose sheet width in an orthogonal direction to a sheet feeding direction is the first width,
• the cooler cools a difference region in which a first sheet feeding region of the pressurizing member through which the sheet having the first width is fed and a second sheet feeding region through which the sheet having the second width is fed are not overlapped with each other, with a cooling power stronger than that of a region corresponding to the first sheet feeding region,
• further comprising a center portion temperature detector that detects temperature of a center portion in a longitudinal direction of the pressurizing member, wherein
• the cooler controls a cooling power so that temperature in a region corresponding to the first sheet feeding region of the pressurizing member is within a target temperature range based on the temperature detected by the center portion temperature detector.