Abstract A process for winding yarn into a cylindrical-bodied substantially straight-ended package wherein the yarn is traverse wound in layers of helical coils on a bobbin and the helix angles of the coils are cyclically varied from a minimum to a maximum and back to a minimum value during a spaced periodic excursion by periodically increasing the traverse rate to a value above that used for ribbon breaking. The maximum value of the helix angle in the excursion is greater than the maximum positive value used in the ribbon-breaking portion of the cycle. Thread line tension variations due to these wide variations in helix angles may be compensated for by periodically decreasing the rate of peripheral package winding speed coincidently with and proportional to the periodic increases in traverse rate.
In a process for winding yarn into a cylindrical bodied substantially straight-ended yarn package wherein the yarn is wound in layers of helical coils at a substantially constant helix angle, including the steps of forwarding the yarn at an essentially constant thread line sPeed to the package, rotating the package at substantially constant peripheral rate of speed and traversing the yarn back and forth across the package at a substantially constant traversal rate, the improvement of which comprises; decreasing said constant thread line speed for a predetermined time in spaced repeating periods throughout the winding of the package.
Claim 2
Dependent Claim
98 words
In a process for winding yarn into a cylindrical bodied substantially straight-ended yarn package wherein the yarn is wound in layers of helical coils at a substantially constant helix angle, including the steps of forwarding the yarn at an essentially constant thread line sPeed to the package, rotating the package at substantially constant peripheral rate of speed and traversing the yarn back and forth across the package at a substantially constant traversal rate, the improvement of which comprises; decreasing said constant thread line speed for a predetermined time in spaced repeating periods throughout the winding of the package.