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. 20, 1999
Filed:
Jun. 11, 1996
Tsuyoshi Kitahara, Nagano, JP;
Hidetaka Sakurai, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
In an ink jet type recording head, a flow passage forming substrate includes pressure generating chambers which are communicated with nozzle openings respectively, a common ink chamber for supplying ink to the pressure generating chambers; and ink supply inlets through which the pressure generating chambers are communicated with the common ink chamber. Each of the ink supply inlets is so designed that it has a narrow part, and it is gradually larger from the narrow part towards the pressure generating chamber, whereby the ink supply inlet is increased in length without changing the flow resistance, and the bonding area near the ink supply inlet is increased.