Method for automatically starting and stopping an open-end spinning machine

US3939638A · kind A · utility

Assignee

• Fried Krupp · DE

Inventors

• Klaus Bruckert
• Herbert Hoffmann · Hennigsdorf, DE
• Gerhard Kutscher
• Rolf Neubert · Unterhaching, DE
• Rolf Wehling

Key dates

• Filing date: Mar 20, 1974
• Grant date: Feb 24, 1976
• Expiry date: Mar 20, 1994

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H4/44
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

An open-end spinning machine system containing a plurality of spinning units, the components of each unit including a spinning turbine, a breakup roller, a feed roller, a yarn extraction device and yarn wiping apparatus, is controlled during stopping and subsequent restarting by an automatic control system which is operated by switching members in such a manner that, during stopping of the system, the turbine, feed roller, yarn extraction device and winding device of each unit are first permitted to decelerate in unison, in a free rundown manner while the rotating speeds remain within the range permitting yarn spinning to continue, and these components are positively braked only when their speeds approach the lower limit of such range, while during restarting of the system, the yarn extraction device and the yarn winding device of each unit are caused to rotate through a selected distance in the direction opposite to their normal operating direction for feeding a fixed length of yarn back into the associated spinning turbine, whereafter the end of the length of yarn fed back into the turbine becomes combined with the yarn which starts to form in the turbine when the spinning operat…