VERFAHREN UND VORRICHTUNG ZUM BEIDSEITIGEN VERNADELN EINES FASERVLIESES

摘要

An endless fibrous web is to be needled from both sides by needling means for piercing the web in only one direction. For that purpose the web is needled in the form of a twisted endless web, which is known as a Möbius web and has been formed in that the two ends of a finite length of the web have been rotated through 180 DEG relative to each other about the longitudinal axis of the web and have then been joined.