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. 12, 2004
Filed:
Jul. 03, 2002
Sukbir Pannu, Cambridge, GB;
Videojet Technologies Inc., Wood Dale, IL (US);
Abstract
A droplet generator for a continuous stream ink jet print head includes an elongate cavity for containing the ink and nozzle orifices in a wall of the cavity for passing ink from the cavity to form jets. The nozzle orifices extend along the length of the cavity. An actuator is disposed on the opposite side of the cavity to the wall for vibrating the ink in the cavity such that each jet breaks up into ink droplets. In operation of the generator, a standing wave is present in the ink in the cavity. The cross-sectional area of the cavity varies along its length in a manner so as to tailor the form of the standing wave in the cavity such that each jet breaks up into the ink droplets at a respective predetermined distance from the wall of the cavity.