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. 21, 2012
Filed:
Jul. 24, 2009
Kenichiroh Hashimoto, Yokohama, JP;
Kenichiroh Hashimoto, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A liquid ejecting head includes multiple nozzles to eject liquid droplet, a vibration unit including a vibration plate, the vibration plate forming at least one wall face of multiple liquid paths that communicate with the respective nozzles, a driving member to move the vibration plate, and the vibration unit formed of laminated multi-layered member that includes a resin layer to form the vibration plate, a first metal layer located on one side of the resin layer, and a second metal layer located on the other side of the resin layer, and wherein the first and second metal layers are formed of different metals, that is, the first metal layer has an ionization tendency higher than that of hydrogen, the second metal layer has an ionization tendency lower than that of hydrogen.