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:
Dec. 15, 2020
Filed:
Aug. 02, 2019
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Katsumi Kakamu, Kuwana, JP;
Masaaki Deguchi, Chiryu, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A liquid ejection head includes: individual passages; supply liquid passages; return liquid passages; a supply coupling liquid passage; and a return coupling liquid passage. The supply liquid passages and the return liquid passages extend in an extending direction and are arranged in an arrangement direction. The supply coupling liquid passage and the return coupling liquid passage extend in the arrangement direction, are located on one side of the supply liquid passages and the return liquid passages in the extending direction, and include an overlapping portion at which the supply coupling liquid passage and the return coupling liquid passage overlap each other when viewed in an orthogonal direction. A damper film is provided between the supply coupling liquid passage and the return coupling liquid passage in the orthogonal direction at at least a portion of the overlapping portion.