Method and apparatus for winding textile yarns
AssigneeBarmag Barmer Maschinenfabrik AG
InventorGerhard Martens
Life of this patent
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Abstract
A method and apparatus for winding textile yarns into packages are provided in which the formation of undesirable patterns in the windings of yarn is completely avoided. According to this invention, any one of the variable parameters of traverse motion speed, such as time intervals between reversals from acceleration to deceleration or vice versa, traverse motion speed attained between such reversals or changes, or rates of acceleration or deceleration, is varied aperiodically, and the control of such speed changes may be accomplished digitally or analogically in response to a random number sequence.
Claims40
In a method of winding textile yarns into core-supported packages in which 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 in which the traverse motion speed of the yarn guide is continually changed by accelerating and decelerating the traverse motion of the yarn guide, the improvement therein comprising changing aperiodically the traverse motion speed of the yarn guide by varying aperiodically at least one of the time intervals between switching from acceleration to deceleration or vice versa, the rate of acceleration and/or deceleration and the traverse motion speed attained between switching from acceleration to deceleration or vice versa to prevent undesirable pattern formation in the yarn windings in the package formed thereby.
In a method of winding textile yarns into core-supported packages in which 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 in which the traverse motion speed of the yarn guide is continually changed by accelerating and decelerating the traverse motion of the yarn guide, the improvement therein comprising changing aperiodically the traverse motion speed of the yarn guide by switching from acceleration to deceleration or vice versa while varying aperiodically the time intervals between such switching so that undesirable pattern formation in the yarn windings in the package formed thereby is prevented.
In a method of winding textile yarns into core-supported packages in which 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 in which the traverse motion speed of the yarn guide is continually changed by accelerating and decelerating the traverse motion of the yarn guide, the improvement therein comprising changing aperiodically the traverse motion speed of the yarn guide by switching from acceleration to deceleration or vice versa whie varying aperiodically the traverse motion speed attained between such switching so that undesirable pattern formation in the yarn windings in the package formed thereby is prevented.
In a method of winding textile yarns into core-supported packages in which 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 in which the traverse motion speed of the yarn guide is continually changed by accelerating and decelerating the traverse motion of the yarn guide, the improvement therein comprising changing aperiodically the traverse motion speed of the yarn guide by switching from acceleration to deceleration or vice versa while varying aperiodically the rate of acceleration and/or deceleration between such switching so that undesirable pattern formation in the yarn windings in the package formed thereby is prevented.
In an apparatus for winding textile yarns into core-supported packages including means for rotating the core to wind the yarn therearound at a substantially constant rate, yarn guide means movable axially of the core for guiding the yarn onto the core, and means for traversing said yarn guide means at a continually changing traverse motion speed, the improvement therein comprising control means operably connected to said traversing means for controllably continuously accelerating and decelerating said yarn guide aperiodically to prevent undesirable pattern formation in the yarn windings forming the package.
Dependencies are inferred from the claim text.