US 12,227,012 B2
Inkjet printing apparatus and control method
Yoshiaki Murayama, Tokyo (JP); and Sonoko Egawa, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 22, 2022, as Appl. No. 18/058,176.
Claims priority of application No. 2021-192449 (JP), filed on Nov. 26, 2021; and application No. 2022-166368 (JP), filed on Oct. 17, 2022.
Prior Publication US 2023/0166522 A1, Jun. 1, 2023
Int. Cl. B41J 2/175 (2006.01); B41J 29/393 (2006.01)
CPC B41J 2/17566 (2013.01) [B41J 29/393 (2013.01); B41J 2002/17589 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An inkjet printing apparatus comprising:
a print head including a plurality of nozzles, each configured to discharge ink onto a print medium;
a cap configured to receive ink discharged from the print head during a preliminary discharge operation;
a storing unit configured to store a value corresponding to an amount of ink discharged to the cap during the preliminary discharge operation; and
a control unit configured to control the print head to start an intra-standby preliminary discharge operation in which the preliminary discharge operation is performed at predetermined time intervals during a standby period after the print head finishes a printing operation to print an image, continue the intra-standby preliminary discharge operation if an accumulated value of the amount of ink stored in the storing unit is not greater than a threshold value, stop the intra-standby preliminary discharge operation if the stored accumulated value of the amount of ink is greater than the threshold value, and bring the print head into contact with the cap and terminate the standby period if the standby period exceeds a first predetermined time period.