Process and an arrangement for the strenghtening of an end portion of a yarn
AssigneeHans Stahlecker
InventorFritz Stahlecker
Life of this patent
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Abstract
For the strengthening of an end portion of a yarn which extends on a spinning station of a spinning machine between a stopped spool package and a suction withdrawal device assigned to the spinning station, the yarn which projects into the withdrawal device is gripped, is lengthened by the winding-off of the yarn wound onto the spool package, and is then strengthened in an essentially stationary position by means of a twisting entered in the area of the yarn end. In the case of an arrangement provided for this purpose, particularly mechanically operating twisting devices are used.
Claims34
A process for strengthening of an end portion of a yarn which is produced at a spinning station of a spinning machine comprising a plurality of such spinning stations and which yarn, after the interruption of the spinning operation, extends between a stopped spool package and a suction withdrawal device assigned to the spinning station, said process comprising:
- gripping a yarn end projecting into the suction withdrawal device;
- lengthening the yarn end portion by winding-off the yarn would up on the package;
- and
- twisting the yarn end portion while it is in an essentially stationary position to thereby strengthen the yarn end portion by applying a true twist thereto.
An arrangement for strengthening of an end portion of a yarn which is produced at a spinning station of a spinning machine comprising a plurality of such spinning stations and which, after the interruption of the spinning operation, extends between a stopped spool package and a suction withdrawal device assigned to the spinning station, said arrangement comprising:
- a suction withdrawal pipe which is connected downstream of the suction withdrawal device of the spinning station;
- spool package drive uncoupling devices for uncoupling a drive of a spool package receiving the spun yarn;
- a controllable gripping element selectively grippingly engageable with the yarn projecting into the withdrawal pipe;
- guiding devices for guiding the yarn away from the withdrawal pipe;
- and
- a twisting device for twisting the yarn end portion of the yarn which leads onto the spool package to thereby strengthen the yarn end portion by applying a true twist to said yarn end portion while it is in an essentially stationary position.
Dependencies are inferred from the claim text.