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:
May. 27, 1980
Filed:
May. 12, 1977
Applicant:
Inventors:
Klaus Schmidt, Hirschberg, DE;
Harald Hoffmann, Mannheim, DE;
Assignee:
Firma Carl Freudenberg, Weinheim, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D06N / ; B32B / ;
U.S. Cl.
CPC ...
428147 ; 156 624 ; 156279 ; 427 25 ; 427195 ; 427245 ; 427355 ; 427366 ; 428 90 ; 428151 ; 428904 ;
Abstract
A sheet material finished on at least one side with a coherent surface layer is formed by electrostatically spraying a solution or dispersion of plastics producing fibers from 0.1 to 30 microns in diameter. Then the mat is consolidated with heat and pressure, whereby the fibers form a tight bond with the surface of the support material which is thus finished.