Patent ID: 8953996
Filing Date: 2015-02-10
Classification: G03G

Abstract:
1. A fixing apparatus comprising: a first roller; a second roller that forms a nip between the second roller and the first roller and presses a sheet passing through the nip against the first roller; a heater that heats at least one of the first roller and the second roller, the heater including a magnetic core and a coil for heating the first roller, wherein a heating range of the heater extends along a longitudinal width of the coil and is greater than a maximum printing width of a predetermined maximum sheet width, and a longitudinal width of the magnetic core is greater than the maximum printing width, and a heat-uniformizing member that distributes heat of the heater along a longitudinal direction thereof, wherein an effective length of the heat-uniformizing member in the longitudinal direction is the same as, or greater than, the predetermined maximum sheet width, and is the same as, or greater than, a sum of a width of a first region and a width of a second region in a sheet width direction, the first region being a region where heat is lost by the sheet at the nip and the second region being a region where heat is not lost by the sheet at the nip.