Patent ID: 7513021

Claim:
A method for entangling at least two yarn strands together into a finished entangled yarn product having a coring level selectively varied along the length of the entangled yarn product in accordance with a preselected pattern, said method comprising: providing a supply of said yarn strands, an entangler, and a controller at least assisting in imparting said pattern, and entangling said yarn strands together with the entangler to provide a supply of said finished entangled yarn while controllably applying a first predetermined tension differential to at least one yarn relative to another of the at least two yarn strands under the direction of the controller to provide a first coring level not equal to zero for a first selected segment thereby providing a first length of finished entangled yarn product, and then applying a second predetermined tension differential to the at least one yarn relative to the another of the at least two yarn strands under the direction of the controller to provide a second coring level for a second selected segment thereby providing a second length of finished entangled yarn product; wherein said second coring level is not equal to said first coring level and the first and second lengths are provided as the supply of said finished entangled yarn.