Patent ID: 8693053

Claim:
An image forming apparatus comprising: a duplex conveyance pathway along which a recording medium can be reversed and re-fed; an output image detector to detect an image or a test pattern formed on a surface of the recording medium; an adjustment and correction unit to adjust and correct image forming conditions based on the detection result of the detector; a conveyance unit to convey the recording medium on a surface of which the test pattern is formed to the duplex conveyance pathway in which the recording medium is in a state of being fed again; and a re-feed unit to re-feed the recording medium and form a test pattern for verifying correction effect on a backside of the recording medium after correcting the image forming conditions, wherein the detector detects the test pattern formed on the backside of the recording medium again to verify the correction effect after the adjustment and correction unit corrects the image forming conditions based on the detection results obtained by the detector.