Method and apparatus for winding textile yarns

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, the improvement therein comprising controlling the traverse of the yarn guide in a recurrent series of stroke modification cycles in each of which the length of the strokes of the yarn guide is shortened at each end of the stroke, within a maximum differential range, during one portion of the cycle by gradually decreasing the length of each successive stroke until a predetermined minimum length of stroke is reached and then by gradually increasing the length of each successive stroke until a predetermined maximum length of stroke is reached, and in each of which the length of stroke is not shortened during the remainder of the cycle, and in which the amount by which the length of the strokes of the yarn guide is shortened is changed from one stroke modification cycle to another by varying aperiodically said predetermined minimum length of stroke to prevent the formation of thickened and hardened places in the yarn package at opposite ends thereof and to thereby provide a substantially cylindrical yarn package of uniform hardness.

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, the improvement therein comprising controlling the traverse of the yarn guide in a recurrent series of stroke modification and pattern breaking cycles in each of which the length of the strokes of the yarn guide is progressively decreased at each end of the stroke up to a maximum differential range and progressively increased again at each end of the stroke up to a maximum constant stroke length during one portion of the cycle and is constant at that maximum stroke length during another portion of the cycle, and in which the maximum differential range by which the length of the strokes of the yarn guide is decreased is changed from one stroke modification cycle to another to prevent the formation of thickened and hardened places in the yarn package at opposite ends thereof while the traverse motion speed of the yarn guide is varied by accelerating and decelerating the traversing yarn guide between predetermined maximum and minimum speeds to prevent undesirable pattern formation in the yarn windings in the package formed thereby.

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 yarn onto the core, and means for traversing said yarn guide means, the improvement therein comprising control means operably connected to said traversing means for controlling the traverse of said yarn guide in a recurrent series of stroke modification cycles each of which has a first segment in which the length of the stroke of said yarn guide means is progressively decreased at each end of the stroke up to a maximum differential range and progressively increased again at each end of the stroke up to a maximum stroke length and a second segment in which the length of the stroke of said yarn guide means is constant at that maximum stroke length, said control means including means for altering the maximum differential range by which the length of the stroke of said yarn guide means is decreased from one traverse stroke modification cycle to another to prevent the formation of thickened and hardened places in the yarn packages at opposite ends thereof.

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, the improvement therein comprising controlling the traverse of the yarn guide in a recurrent series of stroke modification cycles in each of which the length of the strokes of the yarn guide is progressively decreased at each end of the stroke up to a maximum differential range and progressively increased again at each end of the stroke up to a maximum constant stroke length during one portion of the cycle and is constant at that maximum stroke length during another portion of the cycle, and in which the maximum amount by which the length of the strokes of the yarn guide is decreased in one stroke modification cycle is changed in another stroke modification cycle to prevent the formation of thickened and hardened places in the yarn package at opposite ends thereof.

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, the improvement therein comprising controlling the traverse of the yarn guide in a recurrent series of stroke modification and pattern breaking cycles in each of which the length of the strokes of the yarn guide is progressively decreased at each end of the stroke up to a maximum differential range and progressively increased again at each end of the stroke up to a maximum constant stroke length during one portion of the cycle and is constant at that maximum stroke length during another portion of the cycle, and in which the maximum amount by which the length of the strokes of the yarn guide is decreased in one stroke modification cycle is changed in another stroke modification cycle to prevent the formation of thickened and hardened places in the yarn package at opposite ends thereof while the traverse motion speed of the yarn guide is varied by accelerating and decelerating the traversing yarn guide between predetermined maximum and minimum speeds to prevent undesirable pattern formation in the yarn windings in the package formed thereby.