Patent ID: 7289758
Filing Date: 2007-10-30
Classification: G03G

Abstract:
1. A fixing device comprising: a heating roller; a pressing roller forming a first fixing nip by contact with an outer surface of the heating roller; an auxiliary pressing member mounted at one side of the pressing roller and forming a second fixing nip by contact with the outer surface of the heating roller; an endless belt surrounding outer circumferences of the pressing roller and the auxiliary pressing member; and a resilient unit biasing the pressing roller and the auxiliary pressing member resiliently toward the heating roller, wherein the resilient unit comprises a first spring connecting an axis of the heating roller and the pressing roller; and a second spring connecting an axis of the heating roller and the auxiliary pressing member, wherein the auxiliary pressing member comprises, a support body having a plate form and forming a predetermined nip by contact with an outer surface of the heating roller, and wherein, in an operation of the fixing device: the heating roller faces a recording medium at a side of the recording medium having a toner image, the pressing roller faces the recording medium at a side of the recording medium that does not have the toner image, and a pressing force of the pressing roller is greater than a pressing force of the auxiliary pressing member.