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:
Apr. 21, 1981
Filed:
Sep. 20, 1979
Applicant:
Inventor:
Jay D Shenk, Lancaster, PA (US);
Assignee:
Armstrong Cork Company, Lancaster, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
162109 ; 162222 ; 162225 ; 264119 ;
Abstract
A low-cost mineral-fiber board having a natural-appearing highly textured surface, and improved uniformity of density is produced by coating the wet-textured surface of a perlite-containing mineral-fiber mat to a depth at least equal to the peak height of the texture with a layer of silicone-coated perlite prior to press-forming the board. The perlite layer fills the voids on the textured surface and provides a buffer layer between the board and press roll, enabling uniform pressure to be applied to the board without disturbing the textured surface. The top perlite layer may be removed by vacuum units before or after drying the board.