Patent · US Expired

Automatic piecing of combination open end rotor spun yarn

US4788817A · kind A · utility

2Cited by

7References

6Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Peter Artzt · Reutlingen, DE
Gerhard Egbers · Reutlingen, DE
Heinz Muller · Waiblingen, DE
Ullrich Stark · Stuttgart, DE

Key dates

Filing date	Mar 7, 1988
Grant date	Dec 6, 1988
Priority date	—
Expiry date	Mar 7, 2008

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01H4/50
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

An improved method and apparatus for stringing up or re-stringing a balanced ply-twisted combination yarn of two components to insure strong piecing-up points. The end of the combination yarn and the end of a continuous filament yarn, which becomes a component of the combination yarn, are both prepared for piecing and inserted into the rotor of an open-end spinning device. Upon start up, the combination yarn engages staple fibers in the rotor consolidating groove while the continuous filament yarn engages the combination yarn within the rotor without any contact of the continuous filament yarn with the rotor consolidating groove.

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