Yarn withdrawal device for open-end spinning arrangements and method of making yarn using same

US7051508B2 · kind B2 · utility

Assignee

• Maschinenfabrik Rieter AG · CH

Inventors

• Gerd Stahlecker · Eislingen/Fils, DE
• Guenter Baur · Glückstadt, DE

Key dates

• Filing date: Jun 23, 2004
• Grant date: May 30, 2006
• Expiry date: Jun 23, 2024

Classification

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

Abstract

A yarn withdrawal device for open-end spinning arrangements has a yarn withdrawal nozzle and a balloon-breaking insert which extends the axial channel of the yarn withdrawal nozzle. The yarn withdrawal nozzle has a curved contact surface for deflecting a yarn to be withdrawn and simultaneously rotating the yarn in a crank-like manner, which contact surface graduates from a front surface into the axial channel. The balloon-breaking insert has an inner wall which is provided with raised areas and/or recesses, with which the yarn comes into contact. The contact surface of the yarn withdrawal nozzle is a smooth steel surface. The raised areas and/or the recesses of the balloon breaking insert are such that a yarn hairiness in the range of 3 mm in length is achievable. In addition, values in relation to the spinning stability, tear resistance and evenness can be achieved which are usual in the case of a notched contact surface of standard yarn withdrawal nozzles without a balloon-breaking insert.