Strings of sport rackets and method for making the same

Abstract

A method for making strings for sport rackets includes a step of extruding two wires of different materials and a step of twining the two wires along an axis to form a string. The string includes a core wire of a first material and a sun-wire of a second material is twined to the core wire. No acid-wash is needed and the two steps can be completed within one machine.

1 . A method for making strings for sport rackets, comprising:
 a step of extruding: extruding two wires of different materials;   a step of twining: twining the two wires along an axis to form a string.   
   
   
       2 . The method as claimed in  claim 1 , wherein the two wires are extruded with pre-set shapes. 
   
   
       3 . The method as claimed in  claim 1 , wherein the two wires are extruded in a pre-set arrangement. 
   
   
       4 . The method as claimed in  claim 1 , wherein the two wires are twined as a string in a pre-set arrangement. 
   
   
       5 . A string for sport rackets, comprising:
 at least two wires which are made by first and second materials respectively, the at least two wires being twined and a third material mixed within the string.   
   
   
       6 . The string as claimed in  claim 5 , wherein the two wires are twined in a pre-set arrangement. 
   
   
       7 . The method as claimed in  claim 5 , wherein each of the two wires has a pre-set shape. 
   
   
       8 . The method as claimed in  claim 1 , wherein the string includes a core wire of the first material and sub-wires of the second material are twined to an outer periphery of the core wire, the third material is filled between the core wire and the sub-wires.