US 11,987,061 B2
Image forming apparatus, image forming method, and storage medium
Satoshi Iwanami, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Satoshi Iwanami, Kanagawa (JP)
Filed on Feb. 16, 2023, as Appl. No. 18/170,007.
Claims priority of application No. 2022-025050 (JP), filed on Feb. 21, 2022.
Prior Publication US 2023/0264482 A1, Aug. 24, 2023
Int. Cl. B41J 2/21 (2006.01); B41J 2/045 (2006.01)
CPC B41J 2/2135 (2013.01) [B41J 2/04505 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a recording head including a plurality of nozzles;
processing circuitry configured to:
print a reference adjustment pattern on a recording medium using a reference nozzle, which is one of the plurality of nozzles;
when the recording medium is conveyed from the reference nozzle in a sub-scanning direction by a predetermined conveyance amount, print an adjustment pattern on the recording medium using a designated nozzle, which is one of the plurality of nozzles and apart by a predetermined distance with respect to a nozzle apart from the reference nozzle in the sub scanning direction by the predetermined conveyance amount;
detect the reference adjustment pattern and the adjustment pattern;
compute a distance between the reference adjustment pattern and the adjustment pattern in the sub-scanning direction; and
determine whether a standard deviation of the distance computed is equal to or larger than a predetermined value.