Process and device for starting spinning on an open-end spinning apparatus

US4676059A · kind A · utility

Assignee

• Schubert & Salzer · DE

Inventors

• Peter Artzt · Reutlingen, DE
• Heinz Muller · Waiblingen, DE
• Gerhard Egbers · Reutlingen, DE
• Eberhard Grimm · Ingolstadt, DE
• Franz Schreyer · Ingolstadt, DE

Key dates

• Filing date: May 8, 1986
• Grant date: Jun 30, 1987
• Expiry date: May 8, 2006

Classification

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

Abstract

In preparation for the start of spinning with an open-end spinning apparatus, suction is provided outside a fiber transport path on the periphery of an opening roller. Such suction is greater than spinning suction which exists at the mouth of a feed channel leading to the fiber-collecting surface. The fiber stream is thereby guided beyond such mouth to be sucked off. At commencement of actual spinning, this added suction is inactivated, to permit the fiber stream to be initially supplied to the fiber-collecting surface. The fiber stream may be controlled with a suction source connected to a sucking-off orifice via a switching device and a suction line. Less conspicuous and more even thread joins are thereby obtained. Control of suction changes may be effected automatically from a servicing trolley, or in other manners. The invention may be practiced with a variety of types of spinning machines, including but not limited to open-end spinning machines having open end spinning rotors for thread formation or a plurality of friction rollers therefor.