Patent ID: 8910896

Claim:
A method of increasing an amount of elastomeric yarn wound onto a spool, comprising: providing a spool; providing an elastomeric yarn; rotating the spool at a speed to define a spool rotation speed; moving the yarn traversely with respect to the spool in an alternating to and fro manner to define a traverse frequency; winding the yarn onto the spool at a helix angle θ over the spool to form a yarn cake thereon, where the helix angle θ is an angle defined between a longitudinal extent of the spool and the yarn being wound onto the spool; controlling the ratio of the spool rotation speed to the traverse frequency to define a wind ratio during the winding of the yarn onto the spool, where the wind ratio is expressed by a combination of formulas 1 and 2 or by formula 3, as follows: W =( N +ε)/ J (formula 1) where: W is the wind ratio, J is the traverse base cycle in cycles per minute (cpm), N is the spool rotation in revolutions per minute (rpm), and ε is the shift amount of the yarn in terms of rotation; ε= Dy /(π* D *sin θ) (formula 2) where: Dy is the pitch of the yarn in millimeters (mm), D is the package diameter in millimeters (mm), and θ is the helix angle (°); W =2 *St /(π* D *tan θ) (formula 3) where: St is the traverse stroke in millimeters (mm), and D and θ are as defined above; and decreasing the traverse speed as the yarn is wound onto the spool in an inverse proportion to an amount of yarn that has been wound.