The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 19, 2022
Filed:
Mar. 31, 2020
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Keita Hirai, Nagoya, JP;
Shohei Koide, Nagoya, JP;
Keita Sugiura, Toyokawa, JP;
Hiroshi Katayama, Toyoake, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A liquid ejection head includes pressure chambers arrayed in an array direction, a supply manifold extending in the array direction, a return manifold disposed below the supply manifold, and a bypass channel. Each pressure chamber receives a pressure for ejecting liquid from a corresponding nozzle. The supply manifold communicates with the pressure chambers and includes a supply opening through which liquid enters from an exterior. The return manifold is formed by a first forming unit to extend in the array direction and communicate with the pressure chambers, and includes a return opening through which liquid exits to the exterior. The bypass channel connects the supply manifold and the return manifold. The first forming unit includes a first top surface defining a top surface of the return manifold, and a first protrusion protruding downward from the first top surface and having a lower end at which the bypass channel is open.