Process and apparatus for piecing a thread in open-end spinning

US5414985A · kind A · utility

Assignee

• Schubert & Salzer Maschinenfabrik AG · DE

Inventors

• Anthony Ball · Charleston, US
• Ulrich Rodiger · Ingolstadt, DE

Key dates

• Filing date: Sep 9, 1994
• Grant date: May 16, 1995
• Expiry date: Sep 9, 2014

Classification

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

Abstract

For piecing a thread in an open-end spinning apparatus having a fibre collection surface, a sliver is supplied to the clothing of an opening cylinder and opened thereby into fibres and is supplied in this form to the fibre collection surface. There, the fibres are incorporated into the end of a returned thread which is then drawn off continuously. During this, the leading end of the sliver, forming a tuft, is supplied for piecing to the opening cylinder, at a penetration depth which is greater than the penetration depth after piecing, whereas piecing is carried out in a manner conventional per se, matched to a reduction in the penetration depth. This reduction in the penetration depth is carried out suddenly in order to counter thick points in the joint. To carry out the process, a penetration depth alteration apparatus is provided which is in controlled connection with a control apparatus.