US 11,938,742 B2
Printing apparatus
Kazunari Matsuura, Komaki (JP)
Assigned to Brother Kogyo Kabushiki Kaisha, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Jul. 18, 2022, as Appl. No. 17/813,095.
Claims priority of application No. 2021-124607 (JP), filed on Jul. 29, 2021.
Prior Publication US 2023/0031611 A1, Feb. 2, 2023
Int. Cl. B41J 29/393 (2006.01); B41J 2/045 (2006.01); B41J 2/21 (2006.01); G06K 15/02 (2006.01); G06K 15/00 (2006.01)
CPC B41J 2/2132 (2013.01) [B41J 2/04505 (2013.01); B41J 29/393 (2013.01); G06K 15/027 (2013.01); B41J 2029/3935 (2013.01); G06K 15/408 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A printing apparatus comprising:
a conveying roller configured to convey a print medium in a conveying direction;
a line head having a first nozzle row and second nozzle row arranged in the conveying direction, each of the first nozzle row and the second nozzle row including a plurality of nozzles aligned along a width direction orthogonal to the conveying direction, the nozzles being configured to discharge liquid, the nozzles of the first nozzle row and the nozzles of the second nozzle row being shifted in the width direction; and
a controller,
wherein the first nozzle row includes: a plurality of first nozzles forming a group; and a plurality of second nozzles forming a group adjacently, in the width direction, to the group of the first nozzles in the first nozzle row,
the second nozzle row is positioned upstream in the conveying direction from the first nozzle row and includes: a plurality of first nozzles forming a group; and a plurality of second nozzles forming a group adjacently, in the width direction, to the group of the first nozzles in the second nozzle row,
the controller is configured to:
store print data of a correction-pattern image in which a first positional shift amount between a first dot and a second dot in the conveying direction and a second positional shift amount between a third dot and a fourth dot in the conveying direction differ from each other, the first dot being a landing position on the print medium of the liquid discharged from one of the first nozzles in the first nozzle row, the second dot being a landing position on the print medium of the liquid discharged from one of the first nozzles in the second nozzle row, the third dot being a landing position on the print medium of the liquid discharged from one of the second nozzles in the first nozzle row, the fourth dot being a landing position on the print medium of the liquid discharged from one of the second nozzles in the second nozzle row; and
cause the liquid to be discharged from the nozzles while causing the print medium to be conveyed, such that a plurality of the correction-pattern images will be printed on the print medium based on the print data with an interval being provided therebetween in the conveying direction.