US 12,319,064 B2
Liquid ejection head, liquid ejection apparatus, and method of supplying liquid
Shingo Okushima, Kawasaki (JP); Seiichiro Karita, Saitama (JP); Takatsuna Aoki, Yokohama (JP); Noriyasu Nagai, Tokyo (JP); Eisuke Nishitani, Tokyo (JP); and Yoshiyuki Nakagawa, Kawasaki (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Apr. 21, 2022, as Appl. No. 17/726,232.
Application 17/726,232 is a division of application No. 17/132,840, filed on Dec. 23, 2020, granted, now 11,511,544.
Application 17/132,840 is a division of application No. 16/407,437, filed on May 9, 2019, granted, now 10,919,301, issued on Feb. 16, 2021.
Application 16/407,437 is a division of application No. 15/991,256, filed on May 29, 2018, granted, now 10,363,747, issued on Jul. 30, 2019.
Application 15/991,256 is a division of application No. 15/388,430, filed on Dec. 22, 2016, granted, now 10,040,290, issued on Aug. 7, 2018.
Claims priority of application No. 2016-003078 (JP), filed on Jan. 8, 2016; and application No. 2016-238891 (JP), filed on Dec. 8, 2016.
Prior Publication US 2022/0250388 A1, Aug. 11, 2022
Int. Cl. B41J 2/14 (2006.01); B41J 2/045 (2006.01); B41J 2/175 (2006.01); B41J 2/18 (2006.01); B41J 29/393 (2006.01); G01L 1/18 (2006.01); G01L 1/22 (2006.01); B41J 2/01 (2006.01)
CPC B41J 2/175 (2013.01) [B41J 2/14024 (2013.01); B41J 2/1404 (2013.01); B41J 2/14072 (2013.01); B41J 2/1433 (2013.01); B41J 2/18 (2013.01); B41J 2002/012 (2013.01); B41J 2002/14403 (2013.01); B41J 2002/14475 (2013.01); B41J 2202/11 (2013.01); B41J 2202/12 (2013.01); B41J 2202/20 (2013.01); B41J 2202/21 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A liquid ejection head comprising:
an ejection opening row in which a plurality of ejection openings for ejecting a liquid are arranged; and
a passage member having a passage communicating with the ejection openings, wherein
the liquid is circulated between an inside and an outside of the liquid ejection head,
the passage member is formed by laminating a plurality of substrates including a first substrate and a second substrate,
the passage member has a longitudinal direction and a lateral direction as the passage member is viewed from a position facing a main surface of the substrates,
the passage formed in the first substrate includes a flow-in-port for flowing the liquid into the passage and a flow-out-port for flowing the liquid out from the passage,
the passage formed in the second substrate includes a first passage for flowing the liquid flowed from the flow-in-port into the plurality of ejection openings and a second passage for flowing the liquid flowed from the first passage into the flow-out port,
the first passage, the second passage, and the ejection opening row extend from one end to the other end in the longitudinal direction,
the first passage and the second passage are provided at least from one end to the other end of the ejection opening row as the liquid ejection head is viewed from a position facing a surface on which the ejection opening row is formed,
the flow-in port is positioned at least at one end in the longitudinal direction of the first passage,
the flow-out-port is positioned at least at one end in the longitudinal direction of the second passage,
the passage forms a passage row including a plurality of the first passages and a plurality of the second passages disposed in parallel in the lateral direction, the first passage being formed at one endmost side of the passage row in the lateral direction, and the second passage being formed at the other endmost side opposite to one endmost side of the passage row in the lateral direction, and
the flow-in port and the flow-out port are located on the same side of the passage member with respect to the longitudinal direction.