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:
Feb. 20, 1996
Filed:
Sep. 26, 1994
Robert T Shumaker, Jr, Manorville, PA (US);
Peter T Dishart, Pittsburgh, PA (US);
Randy R Kadunce, New Kensington, PA (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
The present invention provides a reusable mask to be used in a coating operation to cover selected portions of a substrate from being coated and minimize ghosting about the periphery of the coating. The mask includes first member having a configuration which generally approximates the area of the substrate to be covered and an edge portion which closely follows the desired peripheral shape of said coating, and a second member underlying at least a portion of the first member and having an edge portion which precisely corresponds to the desired peripheral shape of the coating. In one particular embodiment of the invention, the edge portion of the second member is no greater than 0.030 inches thick, and preferably no greater than 0.010 inches thick to minimize any ghosting of the coating about its periphery caused by the second member. In addition, the distance between the edge portions is sufficient to eliminate any shading of the coating about its periphery caused by the first member.