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:
Aug. 18, 2009
Filed:
May. 21, 2007
Fujio Akahane, Nagano, JP;
Nagamitsu Takashima, Nagano, JP;
Kazushige Hakeda, Nagano, JP;
Ryoji Uesugi, Nagano, JP;
Yasunori Koike, Nagano, JP;
Fujio Akahane, Nagano, JP;
Nagamitsu Takashima, Nagano, JP;
Kazushige Hakeda, Nagano, JP;
Ryoji Uesugi, Nagano, JP;
Yasunori Koike, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An object is to provide a fine forging method for forming partitions of recesses precisely and forming recess shapes for pressure generation chambers etc. with high accuracy as well as a liquid ejection head that is produced by using the fine forming method. A fine forging method for forming groove-shaped recesses that are arranged at a prescribed pitch. After groove-shaped recesses are formed tentatively in a material plate by a first punch in which tentative forming punches are arranged, finish forming is performed on the tentatively formed groove-shaped recesses by using a second punch in which finish forming punches are arranged. An end portion of a projection strip is formed with slant faces or a slant face, whereby an end portion of each groove-shaped recess is formed precisely. A liquid ejection head produced by the above method exhibits stable liquid ejection characteristics and its manufacturing cost can be reduced by virtue of simplified working of forging.