Patent ID: 7421236
Filing Date: 2008-09-02
Classification: G03G

Abstract:
1. A fixing unit to thermally fuse a toner image onto a printing medium by applying heat and pressure to the printing medium having the toner image, the fixing unit comprising: a heat roller including a heat source; a plurality of pressing rollers in contact with the heat roller; a first elastic body to elastically apply pressure to first ends of each of the plurality of pressing rollers towards the heat roller and a second elastic body to elastically apply pressure to second ends of each of the plurality of pressing rollers towards the heat roller; a plurality of backup members disposed such that a respective one of the plurality of backup members is in close contact with a central portion of a corresponding one of the plurality of pressing rollers to locally press the central portion of the corresponding pressing roller towards the heat roller; and at least one backup elastic body to elastically press a corresponding one of the plurality of backup members towards the heat roller.