Patent · US Expired

Thread withdrawal nozzle for an open-end spinning apparatus

US6389789B1 · kind B1 · utility

4Cited by

9References

24Claims

0Family size

Assignee

Rieter Ingolstadt Spinnereimaschinenbau AG · DE

Inventors

Heinrich Preininger · Waldbronn, DE
Heinz Muller · Waiblingen, DE

Key dates

Filing date	May 25, 2001
Grant date	May 21, 2002
Priority date	—
Expiry date	May 25, 2021

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01H4/40
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

For the formation of a thread withdrawal nozzle for an open-end spinning apparatus which possesses a spin rotor, a thread contact surface (32) of the nozzle is provided with projections (36), which projections close at an obtuse angle (&agr;) with the thread contact surface (32). Thereby, a satisfactory twist propagation is obtained to the fiber entwinement point, so that, in this manner, a softer thread can be produced. Advantageously, the thread is not roughened by this treatment.

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