| 摘要 |
A method and apparatus for forming a wound yarn package on a winder having a rotary traverse cam and a cooperating follower yarn guide for traversing a strand of yarn as it is wound onto the package. The winder is equipped to synchronize ribbon breaking, scattering, and shortening of the traverse stroke of the yarn guide, for slowly or rapidly winding a cheese (or cone) shaped yarn package usually with tapered end faces so that the package is suitable for very rapid over-end unwinding within tolerable yarn breakage limits, as on a "shuttleless" loom. A package drive roll is operated at constant speed and the traverse cam speed is varied in the neighborhood of 10 to 30 percent or more to provide a form of ribbon breaking and constantly varying high and low wind ratios. Scattering is provided at opposite end portions of the package for a length sufficient to avoid hard corners at the opposite end faces of the package. Traverse stroke shortening is not always required but, depending on the characteristics of the yarn, is generally desirable for tapering the end faces to deter stitching. Stroke shortening and scattering are accomplished by axial shifting of the rotary traverse cam. The ribbon breaking and scattering features are synchronized so that the sharpest yarn reversals are provided at the end faces with broader reversals immediately inwardly of these faces.
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