Apparatus and method for effecting yarn piecing on an open-end rotor spinning machine

US5640838A · kind A · utility

Assignee

• Rieter Ingolstadt Spinnereimaschinenbau AG · DE

Inventors

• Werner Billner · Ingolstadt, DE
• Josef Breitenhuber · Buxheim, DE

Key dates

• Filing date: May 1, 1995
• Grant date: Jun 24, 1997
• Expiry date: May 1, 2015

Classification

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

Abstract

In preparation of the piecing process in an open-end rotor spinning device, negative pressure is first applied in a housing containing the spinning rotor, and the rotor cover is brought from its operating position into a fiber evacuation position in which it is lifted off from the housing. Fiber feeding is then switched on. The fiber stream produced thereby, together with the air stream which conveys the fibers is deflected and is evacuated by means of the negative pressure prevailing in the housing over the open rotor edge from the interior of the rotor and from the housing, until the rotor cover is brought back into its operating position to convey fibers to the fiber collection groove. To carry out this process, a controllable opening device which is connected to the control device controlling the piecing process, and by means of which the rotor cover can be brought into a fiber evacuation position and into an operating position, and a seal ensuring tightness between the two parts of the fiber feeding channel in both positions of the rotor cover are assigned to the rotor cover.