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:
Mar. 29, 2011
Filed:
Mar. 05, 2009
Takeshi Kijima, Saitama, JP;
Shoichi Iino, Nirasaki, JP;
Takeshi Kijima, Saitama, JP;
Shoichi Iino, Nirasaki, JP;
Seiko Epson Corporation, , JP;
Abstract
A droplet ejection device includes: a substrate having first, second, third & fourth pressure chambers extending in a first direction; a nozzle plate below the substrate & having first, second, third & fourth nozzle apertures continuous with first, second, third & forth pressure chambers, respectively; a vibration plate above the substrate; first, second, third & fourth piezoelectric elements above the vibration plate & above first, second, third & fourth pressure chambers. wherein, viewed in a second direction orthogonal to the first direction, the first nozzle aperture positioned to overlap the third nozzle aperture & doesn't overlap the second & fourth nozzle apertures; the second nozzle aperture overlaps the fourth nozzle aperture & doesn't overlap the first & third nozzle apertures, viewed in the second direction; the first piezoelectric element positioned to overlap the third piezoelectric element & doesn't overlap the second & fourth piezoelectric elements, viewed in the second direction; & the second piezoelectric element overlaps the fourth piezoelectric element & doesn't overlap the first & third piezoelectric elements.