Process and apparatus for preparing a cut-to-length thread end for the re-piecing of an open-end spinning machine

US4653260A · kind A · utility

Inventors

• Peter Artzt · Reutlingen, DE
• Heinz Muller · Waiblingen, DE
• Gerhard Egbers · Reutlingen, DE
• Gunther Bohm · Eichstätt, DE
• Stephan Wittmann · Neubeuern, DE
• Rupert Karl · Ingolstadt, DE

Key dates

• Filing date: May 17, 1985
• Grant date: Mar 31, 1987
• Expiry date: May 17, 2005

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H4/50
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

To improve the re-piecing operation, especially in terms of its success rate, at high spinning speeds, the free thread end cut to the length of a piecable end and retained after cutting the length is exposed to a turbulent air flow which causes it to execute whiplash-like oscillations. The surface of the thread end is thereby roughened. The thread end prepared in this way is subsequently transferred to the fiber-collecting surface of the open-end spinning apparatus. The roughening of the surface of the free thread end is accelerated when the end is whipped against an edge-like projection or a rough surface.