Patent ID: 8879935
Filing Date: 2014-11-04
Classification: G03G

Abstract:
1. An apparatus to control the temperature of a heating roller used in a fusing device of an image forming apparatus, the apparatus comprising: the heating roller that generates heat to melt toner attached to a printing medium; a first induction coil that is disposed outside the heating roller and heats the heating roller by using induced current generated according to current flowing through the first induction coil; two second induction coils that are disposed at upper portions of both ends of the first induction coil and heat the heating roller by using induced current generated according to current flowing through the two second induction coils; and a power supply unit that supplies current to the first induction coil and the two second induction coils, wherein overlapping portions between the first induction coil and the second induction coils are disposed at both ends of the heating roller and are bent away from the heating roller.