Patent ID: 8755733

Claim:
A fixing device comprising: a conveyance member to convey a recording medium to a fixing nip where an image carried on the recording medium is fixed onto the recording medium, the conveyance member comprising a central portion defining a maximum size of recording medium that the fixing device can accommodate and lateral end portions outside the central portion; a plurality of temperature detectors to detect temperatures of the conveyance member, the detectors disposed at both end portions of the conveyance member outside the central portion of the conveyance member; a guide member comprising a guide plate to guide the recording medium toward the fixing nip; a guide plate displacing unit to displace at least part of the guide member in a direction orthogonal to a conveyed surface of the recording medium to be conveyed at the fixing nip; and a controller that controls the guide plate displacing unit based on a temperature difference between the temperatures detected by a first of the plurality of temperature detectors at one of the end portions of the conveyance member and a second of the plurality of temperature detectors at another of the end portions of the conveyance member which is opposite to said one of the end portions.