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:
Jul. 04, 2000
Filed:
May. 14, 1999
Darrell K Hutchins, Conway, AR (US);
Board of Trustees of the University of Arkansas, Little Rock, AR (US);
Abstract
A powder spray gun, and method for using same, is disclosed. The powder gun includes a corona discharge tip and mesh screen within the passage for powder flow. A potential is applied to the corona discharge tip, resulting in an electric field between the corona discharge tip and mesh screen. This electric field efficiently charges powder particles passing through the spray gun, but the mesh screen blocks most of the free ions that are generated by the corona discharge tip. Any free ions that pass through the mesh screen are captured by a conductive end piece on the spray gun. A potential difference is applied between the end of the spray gun and the workpiece to guide the charged powder particles to the workpiece.