Patent ID: 7397488
Filing Date: 2008-07-08
Classification: G03G

Abstract:
1. An image forming apparatus having a heat member for heating a recording material which bears an unfixed image thereon, configured so that a longitudinal center of the heat member corresponds to a conveyance center of the recording material, said image forming apparatus comprising: a central portion temperature detection part disposed adjacent to the conveyance center, for controlling a temperature of the heat member to be a desired temperature; an end portion temperature detection part for detecting an end portion temperature of the heat member; and a width detection part for detecting a lateral width of the recording material, wherein said width detection part is disposed at a side opposite to a side at which said end portion temperature detection part is disposed with respect to the conveyance center position of the recording material, and wherein a plurality of the width detection parts are disposed within an area from the conveyance center position to an end portion of the recording material, and at least one of the plurality of the width detection parts is disposed at a symmetric position with respect to the end portion temperature detection part and the conveyance center position.