Method and device for joining an upper thread to a lower thread

US4232509A · kind A · utility

Assignee

• W. Schlafhorst AG & Co. · DE

Inventors

• Joachim Rohner · Wittlich, DE
• Reinhard Mauries · Mönchengladbach, DE
• Heinz Zumfeld · Wittlich, DE

Key dates

• Filing date: Mar 13, 1979
• Grant date: Nov 11, 1980
• Expiry date: Mar 13, 1999

Classification

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

Abstract

Method and device for joining together an upper and a lower thread, which includes moving at least one first thread feeder from a thread pick-up position to a thread transfer position, inserting the upper and the lower threads into a longitudinal slot formed in a chamber, holding the threads in the slot until compressed air is admitted to the chamber, and at given positions during the movement of the first thread feeder; closing the chamber with a lid, automatically severing the ends of the upper and lower thread and blowing compressed air into the chamber.