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. 14, 1978
Filed:
Oct. 20, 1976
Applicant:
Inventor:
David W Akerson, St. Paul, MN (US);
Assignee:
Conwed Corporation, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B44C / ;
U.S. Cl.
CPC ...
101 32 ; 101 21 ;
Abstract
A method for surface embossing mineral fiber sheets, comprising mineral fibers, perlite and binders, is disclosed. A liquid, preferably water, is sprayed on the surface of the board to be embossed and the wet surface is compressed at an elevated temperature of from 550.degree. to 750.degree. F for about 0.1 to about 2 seconds. The elevated temperature rapidly forms steam which penetrates the sheet surface to be embossed by the simultaneous application of pressure.