Patent · US Expired

Yarn false twisting method and apparatus

US4549395A · kind A · utility

9Cited by

4References

15Claims

0Family size

Assignee

Barmag Barmer Maschinenfabrik Aktiengesellschaft · DE

Inventor

Peter Dammann · Remscheid, DE

Key dates

Filing date	Feb 24, 1984
Grant date	Oct 29, 1985
Priority date	—
Expiry date	Feb 24, 2004

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD02G1/087
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A yarn false twisting method and apparatus is disclosed, and which includes a pair of oppositely rotating friction discs which are mounted with opposing faces to define a twisting zone therebetween. The yarn is advanced through the twisting zone to impart twist to the yarn in one direction, and the advancing yarn is deflected downstream of the discs so that the yarn is brought into frictional contact with the peripheral edge of one of the discs, to thereby impart an opposite twist to the yarn. The invention is useful in that it permits increased running speed and twist level, and the resulting yarn may be characterized by reduced instances of "tight spots" and less fuzziness resulting from filament breaks.

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