Patent · US Expired

False twist roll

US4956970A · kind A · utility

4Cited by

7References

8Claims

0Family size

Assignee

Barmag AG · DE

Inventors

Karl-Heinz Bauer · Graben-Neudorf, DE
Hellmut Lorenz · Lennep, DE

Key dates

Filing date	May 11, 1989
Grant date	Sep 18, 1990
Priority date	—
Expiry date	May 11, 2009

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD02G1/08
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A false twisting roll for imparting false twist to an advancing yarn of manmade fibers is disclosed. The roll has a generally conical and somewhat concave surface configuration, and the angle of inclination of the roll axis is adjustable with respect to the yarn path leading into contact with the roll. To insure optimal twisting conditions at all adjustable inclinations of the roll, the position of the pivotal axis of the roll, and the shape of the surface of the roll are adapted to each other so that the yarn path leading into contact with the roll is predetermined and remains constant. This in turn assures that the upstream twisting conditions of the yarn are unchanged.

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