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. 20, 1992
Filed:
Feb. 19, 1991
Ion Inculet, London, CA;
Nordson Corporation, Westlake, OH (US);
Abstract
A method and apparatus for electrostatically spraying conductive coating material onto objects, primarily large extended objects, by charging with a relatively large charge the space behind the surface to be coated. With hollow objects, such as automobile bodies, the space within the body is charged. The space is charged by spraying an electrostatically charged atomized water mist into the space which evaporates charging the space and object surface. An electrostatic field is produced between the surface and the gun which, along with the supply of conductive material to which it is connected, is grounded. The gun discharges a film of coating which is atomized into droplets. The field inductively charges the film fringe and thus the droplets which are then attracted onto the large charged surface.