Open-end spinning machine and process for the start-up of such a device

US4893462A · kind A · utility

Assignee

• Schubert & Salzer Maschinenfabrik AG · DE

Inventors

• Erwin Braun · Ingolstadt, DE
• Eberhard Grimm · Ingolstadt, DE

Key dates

• Filing date: Aug 3, 1988
• Grant date: Jan 16, 1990
• Expiry date: Aug 3, 2008

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H4/24
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

In an open-end spinning device with a spinning rotor a compressed air conduit is provided for directing an air current upon the inner surface of the spinning rotor. This compressed air conduit is connected through a stop valve to a source of compressed air. The compressed air conduit is provided with a pressure control device which can be pre-set to at least two pressure levels. The pressure control device has parallel conduits of which one conduit is provided with a pressure reduction device for the low pressure. During the preparation of the piecing operation, compressed air, at high pressure, is fed into the spinning rotor to clean said spinning rotor. Subsequently, but before the start of fiber feeding into the spinning rotor, the compressed air is reduced to a lower pressure value and is finally switched off before the yarn is fed back into the spinning rotor. The invention includes the process for restarting the open-end spinning device. Both the process and the device may be manually or automatically operated.