Method for automatically piecing a thread at a workstation of a textile machine, and textile machine

US10907278B2 · kind B2 · utility

Assignee

• Maschinenfabrik Rieter AG · CH

Inventors

• Bernd Bahlmann · Schrobenhausen, DE
• Romeo Pohn · Geisenfeld, DE
• Sebastian Brandl · Böhmfeld, DE
• Mario Maleck · Eichstätt, DE
• Frank Baier · Geisenfeld, DE
• Robert Hagl · Rottenegg, DE
• Thomas Gruber · Ingolstadt, DE
• Robin Wein · Ingolstadt, DE
• Christian Kettner · Bad Birnbach, DE
• Andreas Hoyer · Mainburg, DE

Key dates

• Filing date: Jan 10, 2019
• Grant date: Feb 2, 2021
• Expiry date: Feb 10, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2701/31
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A method for automatically piecing a thread at a workstation of a textile machine, includes seeking an end of the thread on a surface of a bobbin with a suction nozzle and unwinding the thread from the bobbin counter to a regular draw-off direction of the thread and sucking the thread into the suction nozzle. The bobbin is driven in a direction of reverse rotation with a drive. A thread loop is draw-opened in the thread and moved towards a piecing unit via movement of a feeder unit. The bobbin is driven in the direction of reverse rotation during the drawing-open of the thread loop such that the thread is unwound from the bobbin. A speed of reverse rotation of the bobbin is coordinated with movement of the feeder unit.