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. 08, 2009
Filed:
Sep. 11, 2007
Sho Onozawa, Kanagawa-ken, JP;
Sho Onozawa, Kanagawa-ken, JP;
FUJIFILM Corporation, Minato-ku, Tokyo, JP;
Abstract
The liquid ejection apparatus includes: a pressure chamber which contains liquid; a nozzle which is connected to the pressure chamber, the liquid being ejected in an ejection direction through the nozzle; a piezoelectric element which applies pressure change to the liquid in the pressure chamber, a part of the liquid protruding from the nozzle upon the pressure change and growing into a column of the liquid having a longitudinal direction parallel with the ejection direction; an electrode which induces a charge on a surface of the column of the liquid; and a voltage control device which controls voltage applied to the electrode, the voltage control device reversing polarity of the electrode when the column of the liquid has grown to a prescribed length.