US 12,393,149 B2
Image forming apparatus that corrects image forming positions
Takuya Hayakawa, Saitama (JP); and Naoto Watanabe, Chiba (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jun. 27, 2024, as Appl. No. 18/757,205.
Application 18/757,205 is a continuation of application No. 18/319,304, filed on May 17, 2023, granted, now 12,050,426.
Claims priority of application No. 2022-083992 (JP), filed on May 23, 2022.
Prior Publication US 2024/0345524 A1, Oct. 17, 2024
Int. Cl. G03G 15/00 (2006.01); G03G 15/01 (2006.01); G06K 15/00 (2006.01); G06K 15/02 (2006.01)
CPC G03G 15/5062 (2013.01) [G03G 15/0136 (2013.01); G03G 15/0178 (2013.01); G03G 15/0189 (2013.01); G03G 15/5041 (2013.01); G03G 2215/0193 (2013.01); G06K 15/002 (2013.01); G06K 15/027 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
an image forming unit configured to form an image, the image forming unit including a first image carrier on which a black image is formed, and a second image carrier on which a color image different from the black image is formed;
a belt member to which the black image and the color image are transferred;
a transfer unit configured to transfer the black image and the color image from the belt member to a sheet;
a mechanical mechanism configured to control contact states between the first image carrier and the belt member and between the second image carrier and the belt member, the contact states including:
a first contact state in which the first image carrier is in contact with the belt member and the second image carrier is separated from the belt member; and
a second contact state in which the first image carrier is in contact with the belt member and the second image carrier is in contact with the belt member;
a controller configured to
control the image forming unit and the mechanical mechanism to form, in the first contact state, a test image for the first contact state, the test image for the first contact state to be used for adjusting an image formation position of an image on a sheet to be formed in the first contact state, and
control the image forming unit and the mechanical mechanism to form, in the second contact state, a test image for the second contact state, the test image for the second contact state to be used for adjusting an image formation position of an image on a sheet to be formed in the second contact state.