发明授权
US4504021A Ribbon free wound yarn package and method and apparatus for producing the same 失效
无丝卷绕纱卷装及其制造方法及装置

Ribbon free wound yarn package and method and apparatus for producing
the same
摘要:
A method and apparatus for producing a ribbon free randomly wound yarn package is disclosed, and wherein a plurality of critical winding ratios at which undesirable pattern formations or ribbons would normally occur are determined and stored in a microprocessor control unit. During the winding operation, the spindle speed and traversing frequency are monitored by sensors and are transmitted to the control unit, and the control unit computes the optimum time for rapidly changing the traversing frequency so that the actual winding ratio moves rapidly through each of the approaching critical winding ratios. The original traversing frequency is re-established after having passed beyond each of the critical winding ratios.
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