Patent ID: 7333743
Filing Date: 2008-02-19
Classification: G03G

Abstract:
1. A fixing device for fixing an image formed on a recording material, comprising: a first rotary member and a second rotary member configured to convey the recording material having an image through a nip part formed between the first rotary member and the second rotary member, to thereby fix the image onto the recording material; a heating part configured to heat the first rotary member, the heating part comprising: a center portion temperature detecting unit configured to detect a temperature of a center portion of the first rotary member; an end portion temperature detecting unit configured to detect a temperature of at least one of end portions of the first rotary member; and a control unit configured to control a heating amount of the heating part, wherein when a plurality of recording materials each having a relatively large width in a direction perpendicular to a conveying direction of the recording material consecutively pass through the nip part between the first rotary member and the second rotary member, the control unit is configured to control the heating amount of the third heating member based on the temperature detected by the center portion temperature detecting unit, and when a plurality of recording materials each having a relatively small width in the direction perpendicular to the conveying direction of the recording material consecutively pass through the nip part between the first rotary member and the second rotary member, the control unit is configured to control the heating amount of the third heating member based on the temperature detected by the end portion temperature detecting unit.