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:
Oct. 09, 2001
Filed:
Feb. 20, 1998
Mahindra F. Abeywardane, Long Beach, CA (US);
Ramesh B. Subbaraman, Fullerton, CA (US);
Barry R. Brucker, Beverly Hills, CA (US);
Independent Ink, Inc., Gardena, CA (US);
Abstract
An ink jet print head apparatus which produces variably controls the ink jet print head orifices and the size of the ink jet droplets ejected therethrough, and a method for controlling the size of said orifices and ink jet droplets. The print head apparatus utilizes orifice plates formed from piezoelectric material selected according to expansion and contraction properties for the variable control of the diameter of the orifice through which the ink is ejected from the print head. The variability of the orifice dimensions is controlled by applying a voltage across the piezoelectric members, resulting in improved control over the size of the ejected ink droplets.