Selvage yarn tensioning apparatus and method
AssigneeMiliken & Company
InventorJohn A. Sollars
Life of this patent
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Abstract
A mechanism to automatically control tension of supplemental yarns added to a weaving or knitting machine has a pivotal control arm, one end of which is influenced by the tension of the yarn being controlled, while a counteracting force is applied to another end of the arm. The movement of the arm is used to modulate and adjust a braking device acting against the yarn holding spool to keep the tension of the yarn substantially uniform over time as the diameter of the yarn wound on the storage spool changes.
Claims12
A yarn tensioning apparatus for providing a substantially constant tension to one or more selvage yarns fed from a spool, comprising:
- a pivotal control arm having a pivot point intermediate its length, one end which is influenced by the tension of the yarn being controlled and the other end being influenced by a counteracting force, a braking device acting against the yarn holding spool, and wherein said counteracting force is supplied by a weight, whereby movement off the arm is used to modulate and adjust the braking device acting against the yarn holding spool to keep the tension of the yarn substantially uniform over time as the diameter of the yarn wound on the spool changes.
Dependencies are inferred from the claim text.