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US 4,397,894 AGranted
Vinyl faced wallboard
AssigneeArmstrong World Industries, Inc.
InventorsCharles Haines, Jr., Raymond C. Kent
Life of this patent
Estimating the term…
Abstract
The invention is directed to a wallboard structure which is first composed of a base sheet having a dense upper surface region. Over the dense surface region there is placed a vinyl sheet. Perforations are placed through the vinyl sheet and through the dense surface region and partly into the base region so there is formed an acoustical vinyl faced wallboard.
Claims6
A wallboard comprising:
- (a) a base sheet composed of two regions, the upper region being of a greater density than the lower region
- (b) a vinyl sheet positioned over the surface of the denser region and fastened thereto, and
- (c) small perforations extending through the vinyl sheet, the denser upper region of the base sheet and partly into the less dense lower region of the base sheet.
Dependencies are inferred from the claim text.