Process and device to piece to a spinning device

US4769981A · kind A · utility

Assignee

• Schubert & Salzer · DE

Inventors

• Peter Artzt · Reutlingen, DE
• Harald Dallmann · Reutlingen, DE
• Kurt Ziegler · Owen, DE
• Gerhard Egbers · Reutlingen, DE

Key dates

• Filing date: Aug 26, 1987
• Grant date: Sep 13, 1988
• Expiry date: Aug 26, 2007

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H15/002
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

In a spinning device of the type equipped with a torsion element having an injector nozzle and a torsion nozzle which are separated from each other during spinning by a gap which is open to the atmosphere, yarn is threaded for piecing into such torsion element, which is brought into a threading position. Threading is effected with the assistance of negative pressure which is applied to the torsion element from the side thereof which constitutes its inlet side during normal spinning. The gap between the injector and torsion nozzles is sealed against the atmosphere before threading of the yarn. Thereafter, and at the latest at the beginning of the withdrawal of the pieced yarn, the gap is opened once more. A sealing device, which may assume various alternative constructions, is provided to carry out the process by sealing the gap between the injector nozzle and the torsion nozzle during the threading phase.