Yarn splicing device for the knot-free piecing of yarns and process for the preparation of yarn ends
AssigneeSchubert & Salzer Maschinenfabrik Aktiengesellschaft
InventorsPeter Artzt, Heinrich Preininger, Gerhard Egbers
Life of this patent
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Abstract
A yarn splicing device for piecing spun yarns without knots. It contains a yarn splicing chamber and a small pipe through which fluid flows, at a distance from the yarn splicing chamber. The small pipe serves to receive a yarn end and to prepare it for the splicing process. The small pipe has a roughened inner surface which makes contact with the yarn end in a battering manner. In the process for the yarn end preparation, the small pipe is traversed turbulently by a fluid. The yarn end is battered by the turbulent flow against the roughened inner surface of the small pipe until the yarn end is free of twist.
Claims16
A device for untwisting one end portion of a single yarn in preparation for splicing in an open-end spinning device, comprising:
- (a) means for presenting and retaining a portion of said yarn;
- (b) at least one untwisting pipe having a longitudinal axis and an entrance and lying in a plane which is perpendicular to the longitudinal axis of the untwisting pipe disposed adjacent said yarn for receiving said one end portion of said yarn;
- (c) an air nozzle means spaced axially from said end of said untwisting pipe for supplying pressurized air along said longitudinal axis of said untwisting pipe to draw said yarn end portion into said pipe;
- (d) said air nozzle means having a flat exit end which is parallel to said end of said untwisting pipe;
- (e) a roughened surface on at least a portion of the inner circumference of said pipe disposed for contact with said yarn end as said turbulent fluid flows through said pipe to assist in untwisting said yarn end;
- and
- (f) means to control said fluid flow through said pipe to remove substantially all twist from said end portion of said yarn.
Dependencies are inferred from the claim text.