Yarn tensioning mechanism
First Claim
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1. A yarn tensioning assembly for use in controlling the supply of yarns to the needles of a tufting machine comprising a pivotal yarn tensioning and clamping apparatus and a rotatable yarn gripping wheel operable so that yarn tensioning is provided when the rotatable yarn gripping wheel is pivoted into engagement with a yarn driving wheel, and yarn clamping is provided when the yarn gripping wheel is pivoted out of engagement with a yarn driving wheel.
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Abstract
A yarn tensioning apparatus is supplied with a yarn clamping position and a positive yarn engaging position to precisely meter yarns to tufting machine needles and especially to more uniformly advance pneumatically supplied yarns to hollow needles.
25 Citations
20 Claims
- 1. A yarn tensioning assembly for use in controlling the supply of yarns to the needles of a tufting machine comprising a pivotal yarn tensioning and clamping apparatus and a rotatable yarn gripping wheel operable so that yarn tensioning is provided when the rotatable yarn gripping wheel is pivoted into engagement with a yarn driving wheel, and yarn clamping is provided when the yarn gripping wheel is pivoted out of engagement with a yarn driving wheel.
- 6. A yarn tensioning assembly for use in controlling the supply of yarns to the needles of a tufting machine comprising a housing with a mounting post, wherein said housing has a slideable weight block at a first end and a teethed yarn roll at a second end and a yarn guide for directing yarn through the assembly.
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19. A method of tensioning, clamping and feeding yarns in a hollow needle tufting machine comprising the steps of:
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(a) feeding a plurality of yarns to a hollow needle, each through a yarn tensioning assembly having a pivotal yarn tensioning and clamping apparatus and a rotatable yarn gripping wheel operable so that yarn tensioning is provided when the rotatable yarn gripping wheel is pivoted into engagement with a yarn driving wheel, and yarn clamping is provided when the yarn gripping wheel is pivoted out of engagement with a yarn driving wheel; (b) selecting a first of the plurality of yarns and pivoting the rotatable yarn gripping wheel of the associated yarn tensioning assembly into engagement with the associated yarn driving wheel; (c) feeding a selected length of the selected first yarn to a hollow needle for tufting; and (d) pivoting the rotatable yarn gripping wheel of the yarn tensioning assembly associated with a second yarn out of engagement with the associated yarn driving wheel and clamping the second yarn so that the second yarn is not fed through the hollow needle. - View Dependent Claims (20)
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Specification