Racket

Abstract

A face of a tennis racket includes a plain weave structure including a plurality of longitudinal threads, a plurality of high-tension transverse threads 36, and a plurality of low-tension transverse threads 38. The tennis racket includes a spin facilitating zone 46. The spin facilitating zone 46 includes: (1) a first high-tension transverse thread 36; (2) a second high-tension transverse thread 36; and (3) an odd number of low-tension transverse threads 38 positioned between the first high-tension transverse thread 36 and the second high-tension transverse thread 36. The spin facilitating zone includes no other high-tension transverse thread 36 positioned between the first high-tension transverse thread 36 and the second high-tension transverse thread 36.

What is claimed is: 
     
         1 . A racket comprising:
 a head including a top and a bottom; and   a face whose contour is formed by the head, wherein   the face includes a plain weave structure including a plurality of longitudinal threads, a plurality of high-tension transverse threads, and a plurality of low-tension transverse threads,   the plain weave structure includes one or more spin facilitating zones,   each spin facilitating zone includes:
 (1) a first high-tension transverse thread; 
 (2) a second high-tension transverse thread; and 
 (3) an odd number of low-tension transverse threads positioned between the first high-tension transverse thread and the second high-tension transverse thread, and 
   the spin facilitating zone includes no other high-tension transverse thread positioned between the first high-tension transverse thread and the second high-tension transverse thread.   
     
     
         2 . The racket according to  claim 1 , wherein
 in the spin facilitating zone, the odd number of low-tension transverse threads positioned between the first high-tension transverse thread and the second high-tension transverse thread is one.   
     
     
         3 . The racket according to  claim 1 , wherein
 a difference (T 2 −T 3 ) between a tension T 2  of the high-tension transverse threads and a tension T 3  of the low-tension transverse threads is greater than or equal to 10 pounds.   
     
     
         4 . The racket according to  claim 1 , wherein
 a ratio (T 2 /T 3 ) of a tension T 2  of the high-tension transverse threads to a tension T 3  of the low-tension transverse threads is greater than or equal to 1.2.   
     
     
         5 . The racket according to  claim 1 , wherein
 a difference (T 1 −T 3 ) between a tension T 1  of the longitudinal threads and a tension T 3  of the low-tension transverse threads is greater than or equal to 5 pounds.   
     
     
         6 . The racket according to  claim 1 , wherein
 a ratio (T 1 /T 3 ) of a tension T 1  of the longitudinal threads to a tension T 3  of the low-tension transverse threads is greater than or equal to 1.1.   
     
     
         7 . The racket according to  claim 1 , wherein
 the one or more spin facilitating zones include at least one spin facilitating zone that is positioned on a top side of the head with respect to a center point of the head.   
     
     
         8 . The racket according to  claim 7 , wherein
 a number Nt of spin facilitating zones positioned on the top side of the head with respect to the center point of the head is greater than a number Nb of spin facilitating zones positioned on a bottom side of the head with respect to the center point of the head.