Patent ID: 9195183
Filing Date: 2015-11-24
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a conveyance passage unit through which a recording medium is conveyed; a fixing device to fix a toner image onto the recording medium conveyed through the conveyance passage unit; an optical sensor including a light-emitting device to emit detection light toward the conveyance passage unit and a light-receiving device to receive light reflected from a surface of the recording medium conveyed through the conveyance passage unit, the optical sensor detecting smoothness of the recording medium according to strength of the light received; a fixing condition adjuster to adjust fixing conditions according to the smoothness detected by the optical sensor; a regulator, disposed in the conveyance passage unit, to regulate conveyance of the recording medium, such that at least a part of the recording medium passes through a predetermined irradiated area including an intersection that is determined by a predetermined emission angle of a first optical axis of the detection light emitted by the light-emitting device and a predetermined reflection angle of a second optical axis of the reflected light received by the light-receiving device, and a pair of conveyance guide boards disposed facing each other in the conveyance passage unit to define a conveyance height in a thickness direction of the recording medium and the conveyance direction of the recording medium, to form a detection section, wherein a reference conveyance axis passes through a center of the pair of conveyance guide boards in the direction of the conveyance height while extending in the conveyance direction of the recording medium.