US 12,216,426 B2
Image forming apparatus controlling formation of test images based on recording material type
Taisuke Matsuura, Ibaraki (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 7, 2023, as Appl. No. 18/243,451.
Application 18/243,451 is a division of application No. 17/961,850, filed on Oct. 7, 2022, granted, now 11,796,951.
Claims priority of application No. 2021-173542 (JP), filed on Oct. 22, 2021.
Prior Publication US 2023/0418200 A1, Dec. 28, 2023
Int. Cl. G03G 15/16 (2006.01); G03G 15/00 (2006.01)
CPC G03G 15/5062 (2013.01) [G03G 15/1675 (2013.01); G03G 2215/00067 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
an image bearing member configured to bear a toner image;
an image forming portion configured to form the toner image on the image bearing member;
a transfer member configured to form a transfer portion where the toner image is transferred from the image bearing member onto a recording material;
an applying portion configured to apply a voltage to the transfer member; and
an executing portion configured to execute an output operation for forming and outputting a chart formed on a recording material on which a plurality of test images are transferred by applying a plurality of test voltages to the transfer member by the applying portion,
wherein the executing portion changes a difference between a maximum value and a minimum value of the plurality of test voltages based on a kind of the recording material on which the chart is formed.