Process and apparatus for rejoining a thread on an open-end friction-spinning device

US4633660A · kind A · utility

Assignee

• Schubert & Salzer · DE

Inventors

• Peter Artzt · Reutlingen, DE
• Gerhard Egbers · Reutlingen, DE
• Hans Rottmayr · Reutlingen, DE

Key dates

• Filing date: Aug 28, 1985
• Grant date: Jan 6, 1987
• Expiry date: Aug 28, 2005

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H4/52
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A process for rejoining the thread on an open-end friction-spinning device, in which fibers are fed into a V-shaped nip subjected to suction, and the thread formed in the V-shaped nip is drawn off from this and wound onto a bobbin. For rejoining, the fiber feed into the V-shaped nip is interrupted and a thread end drawn off from the bobbin is guided towards the V-shaped nip counter to the spinning direction. This thread end is paid out in front of the V-shaped nip and is stored in a joinable length in a storage station at the end of the V-shaped nip facing away from the bobbin. The bobbin is then advanced towards its drive roller and the thread is drawn off from the storage station. After a predetermined time after the start of the thread draw-off, the fibers are fed again into the V-shaped nip, where they come up against the thread end running through the V-shaped nip and are twisted together with this.