Spindle with injector duct and piecing method for an airjet spinning machine
AssigneeMaschinenfabrik Rieter AG
InventorsOlivier Wust, Herbert Stalder
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Abstract
A spindle of an airjet spinning machine for guiding back the free yarn end after an interruption in a spinning process is disclosed. The spindle contains an injector duct in the immediate vicinity of the spindle orifice. To guide the free yarn end back after an interruption, compressed air is admitted through the injector duct and generates a suction action at the spindle end. After the yarn end has been guided back level with the entrance of the injector duct the yarn end is blown out of the spindle orifice by the compressed air.
Claims20
A spindle for a spinning station of an air jet spinning machine, comprising:
- a yarn guide duct having a spindle aperture and an end;
- an injector duct configured to inject compressed air in the vicinity of the spindle aperture without movement of the yarn guide duct;
- wherein upon injection of the compressed air, a suction action arises at the end of said yarn guide duct, the suction action facilitating the guiding back of a yarn end.
A method for piecing after an interruption in a spinning process in a spindle comprising a yarn guide duct having a spindle aperture and an end in which a free yarn end is guided in reverse through said spindle aperture, the method comprising:
- injecting compressed air into the vicinity of the spindle aperture without movement of the yarn guide duct;
- said injection of compressed air causing a suction action arising at the end of said yarn guide duct;
- said suction action causing the free yarn end to be guided in reverse.
A method for piecing after an interruption in a spinning process in a spindle for a spinning station, the spindle comprising a yarn guide duct having a spindle aperture and an end, the spindle further comprising an injector duct configured to inject compressed air in the vicinity of the spindle aperture;
- the method comprising:
- injecting compressed air into the vicinity of the spindle aperture without movement of the yarn guide duct;
- said injection of compressed air causing a suction action arising at the end of said yarn guide duct;
- said suction action causing the free yarn end to be guided in reverse.
Dependencies are inferred from the claim text.