Spinning device for open-end spinning

US4665687A · kind A · utility

Assignee

• Rieter Machine Works, Ltd. · CH

Inventors

• Ernst Ott · Hanau, DE
• Christoph Kuratle · Winterthur, CH

Key dates

• Filing date: Oct 14, 1986
• Grant date: May 19, 1987
• Expiry date: Oct 14, 2006

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H4/40
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The spinning device for open-end spinning contains a withdrawal nozzle with a substantially spiral-shaped bead or ridge as well as a twist blocking element or twist trap containing beads or ridges and provided in a thread withdrawal passage. The inclinations of the substantially spiral-shaped bead or ridge and of the beads or ridges in the withdrawal nozzle and in the withdrawal passage, respectively, substantially extend in the same direction or sense as the twist of the yarn. This device permits increasing the stability of the yarn, reducing the number of thread breakages and/or increasing the production rate. The yarn characteristics are less dependent upon the fiber material and the yarn type. In particular, the production of yarns with a soft handle is rendered possible at higher rotor speeds than heretofore possible.