US 11,794,494 B2
Image forming apparatus
Hiroki Takahashi, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Hiroki Takahashi, Kanagawa (JP)
Filed on Oct. 28, 2021, as Appl. No. 17/513,545.
Claims priority of application No. 2020-197492 (JP), filed on Nov. 27, 2020.
Prior Publication US 2022/0169044 A1, Jun. 2, 2022
Int. Cl. B41J 11/00 (2006.01); G03G 15/00 (2006.01); B41J 29/393 (2006.01); B41J 11/46 (2006.01)
CPC B41J 11/007 (2013.01) [B41J 11/0095 (2013.01); B41J 11/46 (2013.01); B41J 29/393 (2013.01); G03G 15/5062 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a conveyor configured to convey a recording medium based on a prescribed amount of conveyance;
an image forming device configured to form an image on the recording medium conveyed by the conveyor;
a marker configured to add a plurality of orderly-arrayed marks on the recording medium when the recording medium is conveyed by the conveyor;
a detector configured to detect the plurality of orderly-arrayed marks on the recording medium; and
circuitry configured to:
calculate an amount of movement of the plurality of orderly-arrayed marks detected by the detector, and
correct the prescribed amount of conveyance of the recording medium based on the amount of movement; and
a roller configured to contact the recording medium and rotate as the recording medium is conveyed by the conveyor,
wherein the marker is disposed on the roller.