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:
Apr. 29, 2008
Filed:
Apr. 13, 2005
Katuichi Kawabata, Yokohama, JP;
Kazuo Asano, Hino, JP;
Katuichi Kawabata, Yokohama, JP;
Kazuo Asano, Hino, JP;
Konica Minolta Holdings, Inc., Tokyo, JP;
Abstract
A driving method of a droplet ejection head having plural channels separated by sidewalls formed with piezoelectric material, the channels being divided into three groups; and an electric voltage pulse is applied to each of the groups sequentially in a time-sharing mode, and to generate a shear deformation of the sidewall, and liquid is ejected as a droplet from a nozzle, wherein applying process of the pulse includes: a first step for enlarging a volume of a channel; a second step for keeping the enlarged volume; a third step for reducing the volume; a fourth step for keeping the reduced volume; and a fifth step for enlarging the volume, wherein the third step starts when α/β≦⅓ is satisfied for the protruded pillar at an adjoining channel nozzle driven just before; where α denotes a width of the pillar, and β denotes a maximum width of the pillar.