Patent ID: 6131009
Filing Date: 2000-10-10
Classification: G03G

Abstract:
A fusing device, comprising:a fusing roller which fuses toner images on a sheet;a pressure roller which contacts said fusing roller with pressure; anda driving device for driving said fusing and pressure rollers;wherein said driving device drives said fusing and pressure rollers so as to satisfy the following inequality:D.sub.fr /D.sub.pr <N.sub.pr /N.sub.fr,where D.sub.fr is a diameter of said fusing roller, D.sub.pr is a diameter of said pressure roller, N.sub.fr is a number of rotations of said fusing roller, and N.sub.pr is a number of rotations of said pressure roller,said driving device further comprises at least one fusing roller gear which is provided at an end of said fusing roller, and at least one pressure roller gear which is provided at an end of said pressure roller and is engaged with said at least one fusing roller gear,said at least one fusing roller gear comprises first and second fusing roller gears disposed at both ends of said fusing roller, andsaid at least one pressure roller gear comprises first and second pressure roller gears disposed at both ends of said pressure roller.