Texturing yarn
AssigneeThe University of Manchester Institute of Science and Technology
InventorPeter William Foster
Life of this patent
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Abstract
A method of controlling the manufacture of false twist textured yarn characterised by adjusting non-isothermally in a closed loop the heat flux taken up by the yarn in tension to a specific yarn dyeability. Adjustment can be achieved by feeding back the output of a direct-acting yarn texture sensor to control at least one of yarn heater heat supply, yarn twist speed and yarn feed speed. The sensor is arranged to sense at least one of textured yarn speed, yarn temperature, yarn bulk and yarn tension. A very compact texturing line is possible when the control method is applied.
Claims31
A method of manufacturing a textured yarn comprising the steps of:
- feeding a yarn to be textured from a supply thereof to a take-up means for the textured yarn along a path including a texturing zone;
- false twisting the yarn so that it is twisted in the texturing zone;
- heating then cooling the twisted yarn in the texturing zone to produce a false twist textured yarn;
- sensing a condition of the yarn at a position in said path;
- providing adjustability of at least one of said feeding, false twisting and heating and cooling steps;
- and
- adjusting at least one of said steps for which adjustability is provided in accordance with the condition sensed in said sensing step,
- wherein the condition sensed in said sensing step comprises yarn speed while tension in the textured yarn is relaxed at a position in said path between the texturing zone and the take-up means.
A method for texturizing a yarn comprising:
- feeding the yarn under tension-from a source to a take-up therefor along a path, said path including a false twist zone;
- heating and cooling the yarn in said false twist zone while the yarn is highly twisted thereby texturizing the yarn;
- and
- controlling a processing parameter effecting the texture of yarn in the false twist zone, said processing parameter being controlled in accordance with the result of a measurement made on the yarn travelling along said path after leaving the false twist zone, said measurement being indicative of the effect of the texturizing on the yarn, wherein the measurement is indicative of the dyeability of the texturized yarn.
A method for texturizing a yarn comprising:
- feeding the yarn under tension from a source to a take-up therefor alone a path, said path including a false twist zone;
- heating and cooling the yarn in said false twist zone while the yarn is highly twisted thereby texurizing the yarn;
- and
- controlling a processing parameter effecting the texture of the yarn in the false twist zone, said processing parameter being controlled in accordance with the result of a measurement made on the yarn travelling along said path after leaving the false twist zone, said measurement being indicative of the effect of the texturizing on the yarn, wherein the measurement is indicative of the bulk of the texturized yarn.
Dependencies are inferred from the claim text.