Mask for coated glass
AssigneePPG Industries, Inc.
InventorsRobert T. Shumaker, Jr., Peter T. Dishart, Randy R. Kadunce
Life of this patent
Estimating the term…
Loading patent…
AssigneePPG Industries, Inc.
InventorsRobert T. Shumaker, Jr., Peter T. Dishart, Randy R. Kadunce
Estimating the term…
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.
A mask to prevent selected portions of a glass substrate from being coated with a transparent coating so as to provide a desired coating shape on said substrate and reduce ghosting along a peripheral edge of said coating, comprising:
A mask to prevent selected areas of a glass substrate from being coated with a transparent coating so as to provide a desired coating shape on said substrate and reduce ghosting along a peripheral edge of said coating, comprising:
In a method of applying a transparent coating to a glass substrate including the steps of covering selected portions of said substrate with a mask having an edge with a configuration corresponding to a desired coating shape and coating said substrate, wherein said mask edge shades said coating along its periphery and causes ghosting of said coating along said periphery, the improvement comprising:
Dependencies are inferred from the claim text.