Stock material or miscellaneous articles – Structurally defined web or sheet – Edge feature
Patent
1994-09-26
1996-02-20
Lusignan, Michael
Stock material or miscellaneous articles
Structurally defined web or sheet
Edge feature
118504, 118505, 421259, 421282, 428195, B32B 2302
Patent
active
054927501
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.
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Dishart Peter T.
Kadunce Randy R.
Shumaker, Jr. Robert T.
Lusignan Michael
PPG Industries Inc.
Siminerio Andrew C.
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