US 12,257,851 B2
Liquid ejection head and liquid ejection apparatus
Manabu Ohara, Tokyo (JP); Naozumi Nabeshima, Tokyo (JP); Soji Kondo, Kanagawa (JP); and Kazuya Yoshii, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 16, 2022, as Appl. No. 18/082,897.
Claims priority of application No. 2021-204924 (JP), filed on Dec. 17, 2021.
Prior Publication US 2023/0191796 A1, Jun. 22, 2023
Int. Cl. B41J 2/175 (2006.01)
CPC B41J 2/17596 (2013.01) 8 Claims
OG exemplary drawing
 
1. A liquid ejection head for ejecting a liquid while being scanned in a main scanning direction, comprising:
an ejection element configured to generate a pressure for ejecting the liquid in a pressure chamber;
a supply channel through which the liquid is supplied to the pressure chamber;
a collection channel connected to the supply channel through the pressure chamber and through which the liquid is collected from the pressure chamber;
a circulation pump capable of supplying the liquid from the supply channel into the pressure chamber, and collecting the liquid in the pressure chamber through the collection channel and sending the liquid to the supply channel;
a first pressure adjustment unit disposed between an outlet channel of the circulation pump and the supply channel and configured to adjust a pressure in the supply channel; and
a second pressure adjustment unit disposed between an inlet channel of the circulation pump and the collection channel and configured to adjust a pressure in the collection channel,
wherein the first pressure adjustment unit is connected to the second pressure adjustment unit through the pressure chamber.