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:
Dec. 17, 2002
Filed:
Nov. 25, 1998
Shinichi Horii, Kanagawa, JP;
Yuichiro Ikemoto, Kanagawa, JP;
Yasuo Yukita, Kanagawa, JP;
Hiroshi Tokunaga, Tokyo, JP;
Masaki Kishimoto, Kanagawa, JP;
Yuji Yakura, Kanagawa, JP;
Tooru Tanikawa, Kanagawa, JP;
Shota Nishi, Kanagawa, JP;
Kenji Suzuki, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An ink-jet printer and an apparatus and a method of driving a recording head for an ink-jet printer for suppressing satellite droplets. Two piezoelectric elements are provided for every ink chamber corresponding to each nozzle. Timing of displacement of the piezoelectric elements is adjusted by applying a drive signal for ink droplet ejection to one of the piezoelectric elements and a drive signal for suppressing satellite droplets when a droplet is ejected to the other piezoelectric element. An auxiliary pressure generated by the displacement of the latter piezoelectric element is superimposed on an ejection pressure generated by the displacement of the former piezoelectric element. Trailing of an ink droplet is cut off at an early stage and generation of satellite droplets is suppressed.