Patent ID: 7146117
Filing Date: 2006-12-05
Classification: G03G

Abstract:
1. A method of controlling temperature of a fuser of an image forming apparatus which fixes a toner image by applying heat and pressure to a surface of a sheet on which the toner image has been formed while the sheet passes an image forming interval, the method comprising: measuring the temperature of the fuser; comparing the measured temperature with a previously measured temperature whether the temperature of the fuser is ascending or descending; controlling a temperature ascent in such a manner that, while the temperature of the fuser is ascending, the temperature of the fuser is controlled by varying a chopping rate of a switching unit that intermittently connects power to the fuser; and controlling temperature descent in such a manner that, while the temperature of the fuser is descending, the temperature of the fuser is controlled by varying the chopping rate of the switching unit that intermittently connects power to the fuser, wherein the controlling the temperature ascent and the temperature descent are asymmetrically controlled from each other.