Patent · US Expired

Apparatus for false twisting yarn

US4339915A · kind A · utility

22Cited by

10References

28Claims

0Family size

Assignee

Barmag Barmer Maschinenfabrik Aktiengesellschaft · DE

Inventors

Peter Dammann · Remscheid, DE
Heinz Schippers
Karl-Heinz Bauer · Graben-Neudorf, DE

Key dates

Filing date	Jul 14, 1980
Grant date	Jul 20, 1982
Priority date	—
Expiry date	Jul 14, 2000

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD02G1/085
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

An apparatus for false twisting a yarn is provided which comprises, in one embodiment, a thin pliable disc mounted for rotation with a cooperating disc or roller to define a twisting zone between opposing friction surfaces thereof. A pressure applying member is mounted adjacent the back face of the pliable disc for biasing the disc toward the other member locally at the twisting zone so as to firmly engage the yarn passing through the twisting zone and while the friction surfaces remain in substantially non-contacting relationship with respect to each other. The pressure applying member utilizes an air cushion between the member and back face of the disc to minimize friction. Where two discs are employed, they may be mounted for rotation in a common direction, and such that the yarn may be guided through the twisting zone without passing between the axes of rotation of the discs.

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