Golf club shaft

Abstract

An improved method for preparing a golf club shaft out of a shaft rod is disclosed. This method utilizes a marking directly provided on the shaft rod. The marking may be scale, wording or marks. The marking provides cutting information to be adequately utilized by workers in cutting operations. The marking additionally provides property information of the shaft or a golf club incorporating the shaft.

What is claimed is:  
     
         1 . A golf club shaft made from a shaft rod having thereon at least one marking which comprises cutting information to be utilized in a shaft cutting operation so as to provide said golf club shaft with a desired performance property.  
     
     
         2 . A golf club shaft according to  claim 1 , wherein said marking is provided in a length which facilitates utilization thereof after said shaft has been incorporated into a golf club.  
     
     
         3 . A golf club shaft according to  claim 1 , wherein said marking comprises scale.  
     
     
         4 . A golf club shaft according to  claim 3 , wherein said scale is calibrated at intervals between 1 mm and 13 mm.  
     
     
         5 . A golf club shaft according to  claim 3 , wherein said scale is calibrated at 5 mm intervals.  
     
     
         6 . A golf club shaft according to  claim 3 , wherein said scale is calibrated at 10 mm intervals.  
     
     
         7 . A golf club shaft according to  claim 3 , wherein said scale is calibrated at ½ inch intervals.  
     
     
         8 . A golf club shaft according to  claim 3 , wherein said scale is calibrated at ¼ inch intervals.  
     
     
         9 . A golf club shaft according to  claim 3 , wherein said scale includes length indicating numerals.  
     
     
         10 . A golf club shaft according to  claim 1 , wherein said marking is provided on said shaft to be out of sight of a player who is addressing a ball using a golf club incorporating said shaft.  
     
     
         11 . A golf club shaft according to  claim 1 , wherein said marking is provided on said shaft rod at a tip end portion thereof.  
     
     
         12 . A golf club shaft according to  claim 1 , wherein said marking is provided on said shaft rod at a butt end portion thereof.  
     
     
         13 . A golf club shaft according to  claim 1 , wherein said golf club shaft has been cut according to cutting information provided in a table of properties in relation to the length of a golf club shaft made from a shaft rod on which said cutting information is prepared.  
     
     
         14 . A method for cutting a shaft rod to provide a golf club shaft, comprising the step of cutting said shaft rod according to a marking comprising cutting information which is provided on said shaft rod.  
     
     
         15 . A method for cutting a shaft rod to provide a golf club according to  claim 14 , said cutting information comprising scale which is calibrated at 10 mm intervals.  
     
     
         16 . A method for cutting a shaft rod to provide a golf club according to  claim 14 , said cutting information comprising scale calibrated at 5 mm intervals.  
     
     
         17 . A method for cutting a shaft rod to provide a golf club according to  claim 14 , said cutting information comprising scale calibrated at ½ inch intervals.  
     
     
         18 . A method for cutting a shaft rod to provide a golf club according to  claim 14 , said cutting information comprising scale calibrated at ¼ inch intervals.  
     
     
         19 . A method for cutting a shaft rod to provide a golf club according to  claim 14 , wherein cutting by said method is performed according to cutting information provided in a table of properties in relation to the length of a golf club shaft made from a shaft rod on which said cutting information is prepared.