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:
Jul. 16, 2002
Filed:
Sep. 30, 1999
Masatomo Kojima, Ichinomiya, JP;
Yoshiyuki Ikezaki, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
An ink ejecting device in accordance with the invention regulates the ink ejecting velocity for each nozzle. A piezoelectric element thereof is made of piezoelectric materials, internal discrete electrodes and a common electrode. When a cut in the common electrode is formed above an ink chamber, the cut creates an area where an electric field is not generated. The extent of deformation of the piezoelectric element is reduced in that area, whereby the ink ejecting velocity from the ink chamber decreases. In this way, it is possible to regulate the ink ejecting velocity for each nozzle by providing the cut and adjusting the extent of deformation. Further, the size of the cut is in proportion to the deceleration of ink ejecting velocity. This cut in the common electrode is created exactly above the center of the ink chamber so that the deforming portion and non-deforming portion of the piezoelectric element are well balanced.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile