Patent ID: 9420134
Filing Date: 2016-08-16
CPC Classification: G03G,G06K,H04N

Claim Text:
1. An image forming apparatus, comprising: an image forming unit configured to form an image on a recording material; a first conveyance path in which the recording material is conveyed to form the image on the recording material; a second conveyance path in which the recording material is conveyed in order to convey the recording material to the first conveyance path again, wherein a recording material and an original are to be conveyed selectively in the second conveyance path; a third conveyance path in which only the original is conveyed, a read unit configured to read an original conveyed in the second conveyance path, at a first read position facing the second conveyance path and to read the original conveyed in the third conveyance path, at a second read position facing the third conveyance path; and a control unit configured to switch the read position of the read unit either at the first read position or the second read position based on a read condition of the read unit and an image forming condition of the image forming unit; a reference member, wherein the control unit switches the read position to a third read position between the first read position and the second read position, and performs a calibration operation of the original read unit based on a result of reading the reference member by the original read unit at a third read position, wherein in a case where the original read unit reads the first surface of the original at the first position and the second surface of an original at the second position and the image forming unit forms an image on both surfaces of the recording material, the control unit controls the read unit to rotationally move to the third read position during the recording material passes along the second conveyance path, and performs the control for correcting the read unit based on the result of reading the reference member by the original read unit.