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:
Feb. 19, 2013
Filed:
Mar. 29, 2011
Keiji Hara, Minowa-machi, JP;
Keiji Hara, Minowa-machi, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A liquid ejecting head includes a liquid supply member including a flow channel formation member in which flow channel groove portions having different lengths is formed each, a flexible member that seals an opening of each of the flow channel groove portions to form a liquid flow channel, a pressure reception portion formation plate that has an opening formed for each of the liquid flow channels, each of the openings overlapping the corresponding liquid flow channel formed, and valves each urged by a coil spring to close the corresponding liquid flow channel, the valve opening the channel against an urging force of the spring due to the positional change of a pressure reception portion as pressure inside the liquid flow channel changes, wherein the openings of the pressure reception portion formation plate have a uniform shape.