Method and device for equalizing tension in parallel yarns
AssigneesS.C. Brevet B.V., Rudolf Johannes G.A. Van Der Hoorn
InventorRuldof Van der Hoorn
Life of this patent
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Abstract
The invention is concerned with a mode of operation and a device to bring parallel fibres, threads or yarns from different delivery points and with individual unequal exit force to the same tension each with the others. The invention consists of three processing steps: decreasing the tension of the fibres from an arbitrary individual tension level to a tension level of about zero; slippage-free transport of the fibres through a slip lock unit with a known velocity determined beforehand; increasing the tension of each and every fibre from a tension level of about zero to the required collective tension level.
Claims17
A method of operation to bring parallel fibres from different supply points and with unequal exit force to a required substantially equal tension, comprising the steps of:
- a) transporting the parallel fibres over a first set of one or more motorized cylindrical rotating elements, wherein a peripheral velocity of the first set of one or more motorized cylindrical rotating elements is greater than a velocity of the parallel fibres whereby at the end of step a) the parallel fibres have a tension that is about zero;
- b) transporting the parallel fibres over a first roller, wherein the parallel fibres are transported without any substantial slippage;
- and
- c) if a greater tension is required, transporting the parallel fibres over a second set of one or more stationary or motorized cylindrical rotating elements, wherein a peripheral velocity of the second set of one or more stationary or motorized cylindrical rotating elements is less than the velocity of the parallel fibres whereby at an end of step c) a required collective tension is achieved.
A device to bring parallel fibres from different supply points and with unequal exit force to a required substantially equal tension, comprising:
- a) a first set of one or more motorized cylindrical rotating elements, wherein the parallel fibres are transported over the first set of one or more motorized cylindrical rotating elements and the first set of one or more motorized cylindrical rotating elements has a peripheral velocity that is greater than a velocity of the parallel fibres, whereby a tension of the parallel fibres is about zero;
- b) a roller, wherein the parallel fibres are transported over the roller without any substantial slippage;
- and
- c) a second set of one or more stationary or motorized cylindrical rotating elements, wherein the parallel fibres are transported over the second set of one or more stationary or motorized cylindrical rotating elements and the second set of one or more stationary or motorized cylindrical rotating elements has a peripheral velocity that is less than the velocity of the parallel fibres, whereby the tension of the parallel fibres reaches a required collective tension.
A method of operation to bring parallel fibres from different supply points and with unequal exit force to a required substantially equal tension, comprising the steps of:
- a) transporting the parallel fibres over a first set of one or more motorized cylindrical rotating elements, wherein a peripheral velocity of the first set of one or more motorized cylindrical rotating elements is greater than a velocity of the parallel fibres whereby at the end of step a) the parallel fibres have a tension that is about zero;
- b) transporting the parallel fibres over a first roller, wherein the parallel fibres are transported without any substantial slippage.
Dependencies are inferred from the claim text.