Process and device for piecing with a spinning device operating with a pneumatic twisting unit

US4893461A · kind A · utility

Assignee

• Schubert & Salzer Maschinenfabrik AG · DE

Inventors

• Peter Artzt · Reutlingen, DE
• Harald Dallman · Reutlingen, DE
• Kurt Ziegler · Owen, DE
• Gerhard Egbers · Reutlingen, DE

Key dates

• Filing date: Mar 2, 1988
• Grant date: Jan 16, 1990
• Expiry date: Mar 2, 2008

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H15/002
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

To piece with a spinning device having a pneumatic twisting unit, a yarn end is back-fed from an output side, through the twisting unit, to drawing equipment, and then inserted laterally into a pair of drawing unit output rollers, from where it is drawn off through the twisting unit in the form of a continuous yarn with a rove being incorporated into it. During the back-feeding of the yarn end to the twisting unit input side, the yarn end is conveyed to a grasping device located at the side of the drawing equipment. The grasping device pulls the yarn end for subsequent insertion into the pair of output rollers past such rollers until such end is alongside the drawing equipment. A yarn presenting device is provided to convey to the grasping device the yarn end leaving the twisting unit input side. The yarn presenting device includes a compressed air nozzle oriented essentially parallel to the nip of the pair of output rollers, the outlet of which is located on a side of the twisting unit across from the grasping device and which outlet is also oriented towards the grasping device to convey the yarn end thereto.