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:
Sep. 17, 2002
Filed:
Jun. 10, 1999
Junhua Chang, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An ink jet recording apparatus comprises a recording head including a pressure generating element provided in association with a pressure generating chamber communicating with a nozzle orifice, an ink drop is jetted from the nozzle orifice by applying a drive pulse to the pressure generating element, drive signal generating means for generating a drive signal, and drive pulse generating means for generating a drive pulse from the drive signal. The drive signal generated by the drive signal generating means contains wave elements capable of activating the pressure generating element and a connection element incapable of activating the pressure generating chamber and for connecting connection ends of the wave elements having different voltage levels. The drive pulse generating means appropriately selects the wave elements in the drive signal and composes them into the drive pulse.