| 摘要 |
<p>A process and apparatus for making alternate S and Z twist plied yarn from individual singles yarns (12, 12a) includes the steps of tensioning the singles yarns (12, 12a) as they move in a path through the process, twisting the individual yarns in either an S or Z direction, snubbing the yarn to restrain ply twisting so the twist in the singles yarn can equalize itself, stopping the forward movement of the yarn, then bonding the ply-twisted yarns at a node while applying twist, stopping the twisting operation, then repeating the procedure while twisting in the opposite direction. The ply-twisted yarn (30) has a lower defect level of less than 2.5 defects per 100-inch length of yarn.</p> |
