Patent · US Expired

Method and device for producing a spunbonded nonwoven fabric

US7191813B2 · kind B2 · utility

0Cited by

9References

20Claims

0Family size

Assignee

Firma Carl Freudenberg · DE

Inventors

Engelbert Locher · Kaiserslautern, DE
Michael Hess · Trippstadt, DE

Key dates

Filing date	Dec 17, 2004
Grant date	Mar 20, 2007
Priority date	—
Expiry date	Oct 27, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/681
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A method for producing a spunbonded nonwoven fabric by extruding a linear sheet of filaments arranged parallelly side by side in the form of a curtain from a plurality of spinning capillaries, involving aerodynamical pulling off and drawing of the filament sheet, the filament sheet (8) which emerges from the drawing duct (12) or which is pulled off a spool being moved laterally crosswise by an air flow having periodically changing directions, the air flow being oriented alternately at an angle toward the filament sheet (8) as viewed in the horizontal plane.

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