Back to results
US 4,667,889 AGranted
Stepped precision winding process
AssigneeBarmag AG
InventorSiegmar Gerhartz
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBarmag AG
InventorSiegmar Gerhartz
Estimating the term…
A method and apparatus for producing ribbon free wound yarn packages is disclosed. In accordance with the method, a textile yarn is wound into a core supported package while the yarn is guided onto the core by a traversing yarn guide. The speed of the traversing yarn guide is proportional to the rotational speed of the package to define a substantially constant winding ratio during each of a series of sequential steps of the winding operation. The speed of the traversing yarn guide rapidly increases at the beginning of each of the sequential steps to produce a stepped precision wind. During at least some of the steps of the precision wind process, the winding ratio is varied from a predetermined ideal winding ratio by a series of recurring deviations, thereby avoiding the formation of undesirable patterns on the surface of the package.
A method of windng a textile yarn into a core supported package to produce a stepped precision wind, and wherein the yarn is wound about the core at a substantially constant rate while the yarn is guided onto the core by a traversing yarn guide, and wherein the speed of the traversing yarn guide is varied between an upper preset value and a lower preset value during each of a series of sequential steps of the winding operation by decreasing in each of the steps the speed of the traversing yarn guide proportionally to the rotational speed of the package to define a substantially constant winding ratio and by rapidly increasing the speed of the traversing yarn guide, and including the steps of
A method of winding a textile yarn into a core supported package to produce a stepped precision wind, and wherein the yarn is wound about the core at a substantially constant rate while the yarn is guided onto the core by a traversing yarn guide, and wherein the speed of the traversing yarn guide is varied between an upper preset value and a lower preset value during each of a series of sequential steps of the winding operation by decreasing in each of the steps the speed of the traversing yarn guide proportionally to the rotational speed of the package to define a substantially constant winding ratio and by rapidly increasing the speed of the traversing yarn guide, and including the steps of
Dependencies are inferred from the claim text.