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:
Jun. 28, 1988
Filed:
Oct. 16, 1986
Ludwig Hartmann, Weinheim, DE;
Gerhard Muller, Kaiserslautern, DE;
Firma Carl Freudenberg, Weinheim, DE;
Abstract
Disclosed is a method for producing spun bonded nonwoven fabrics which have a highly uniform fleece structure and a uniform weight per unit area. In the method, a plurality of linear ranks of filaments, disposed side by side are spun from a plurality of long spinnerets. The filaments are aerodynamically drawn downward, stretched, and then fixed on a moving screen. The linear ranks of filaments are deflected and set in a pendular movement. The ranks are carried on an air cushion on the moving screen through a spreading section in which the ranks of filaments are turned around and laid down in a criss-crossing and substantially loop-like manner, and are fixed on the screen by vacuum.