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:
May. 27, 2003
Filed:
May. 24, 2001
Toshihiko Harajiri, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A head chip has a substrate having a first main surface and a second main surface opposite the first main surface. First partition walls are disposed on the first main surface of the substrate in spaced apart relation at a preselected interval to form first channels each for receiving ink. Second partition walls are disposed on the second main surface of the substrate in spaced apart relation at a preselected interval to form second channels each for receiving ink. Electrodes are connected to side walls of the first and second channels and are driven by a voltage signal to deform the side walls to vary the volume in the first and second channels to thereby eject ink from the first and second channels.