Device for joining an upper thread to a lower thread

US4322943A · kind A · utility

Assignee

• W. Schlafhorst AG & Co. · DE

Inventors

• Joachim Rohner · Wittlich, DE
• Heinz Zumfeld · Wittlich, DE

Key dates

• Filing date: Jan 16, 1981
• Grant date: Apr 6, 1982
• Expiry date: Jan 16, 2001

Classification

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

Abstract

Device for joining an upper thread to a lower thread by splicing, including a splicing chamber for inserting and joining the threads, a compressed air canal ending inside the splicing chamber, a thread feeder being movable from a thread receiving position to a thread surrender position for inserting the threads into the splicing chamber, thread cutting means for cutting off ends of the upper and lower threads to produce shortened thread ends, a controllable and adjustable compressed air dosing valve being connected to the compressed air canal, first pneumatic means disposed above the splicing chamber for receiving the shortened thread end of the lower thread, second pneumatic means disposed below the splicing chamber for receiving the shortened thread end of the upper thread, and suction nozzles disposed on the pneumatic means having screen-like perforated surfaces, the thread cutting means, dosing valve and pneumatic means being controllable as a function of the position of the thread feeder.