Patent · US Expired

Multiple-layered non-woven fabric

US4093763A · kind A · utility

13Cited by

2References

13Claims

0Family size

Assignee

Lutravil Spinnvlies GmbH & Co.

Inventors

Ludwig Hartmann · Wilmington, US
Paul F. Maahs
Luder Gerking · Berlin, DE
Ivo Ruzek · Kaiserslautern, DE
Eberhard Schafer

Key dates

Filing date	Oct 9, 1975
Grant date	Jun 6, 1978
Priority date	—
Expiry date	Oct 9, 1995

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/671
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Disclosed is a multiple-layered non-woven fabric particularly suited for use as backings for tufted carpets in view of its excellent strength and dimensional stability properties. The non-woven fabric is characterized by specifically defined strength parameters and by a graduaton of bonds throughout the thickness thereof, so that both surfaces differ from each other insofar as the degree of filament bonding is concerned.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.