The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 1985
Filed:
Mar. 18, 1983
Siegmar Gerhartz, Remscheid, DE;
Barmag Barmer Maschinenfabrik AG, Remscheid, DE;
Abstract
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. The present invention further includes continuously oscillating at least the initial value of the traverse speed between a maximum and a minimum value, which renders it unnecessary to change the traverse speed in the case of certain less critical ribbons. Where the ribbon breaking traverse speed is also oscillated, ribbon symptoms which occur in the intermediate ribbon area of the ribbon breaking value of the traverse speed can be avoided or alleviated.