Patent ID: 6788906
Filing Date: 2004-09-07
Classification: G03G

Abstract:
A fusing device for use with an image forming device, which supplies toner to a latent image that is obtained by being exposed to light on a charged image carrier to form the latent image into an image and transfers a resultant toner image from the image carrier to a recording material, and for fixing the toner image on the recording material by applying a predetermined quantity of heat to the recording material,the fusing device comprising: a heat roller which forms a portion of a conveyance path for the recording material and nips the recording material; a plurality of lamps which are accommodated within the heat roller and are connected in serial with each other and serve as heat sources; a switching component which classifies the plurality of lamps into at least a main lamp group and a sub-lamp group and is able to switch between application of electricity to the main lamp group and the sub-lamp group, application of electricity to only the main lamp group and application of electricity to neither the main lamp group nor the sub-lamp group; and a temperature control component which controls a temperature of the heat roller by controlling on or off switching of the plurality of lamps to control the power stage of the plurality of lamps with at least stages of off, low power and full power.