Method of manufacturing a bent composite putter shaft

A method for manufacturing a carbon reinforced polymer double bend putter shaft, the method comprising:

• wrapping a plurality of plies on a mandrel comprising a steel body and an aluminum tip to create a wrapped mandrel, wherein the plurality of plies comprises plus forty-five degree orientation pattern plies, minus forty-five degree orientation pattern plies and zero degree orientation pattern plies;
• applying a release film coated shrink wrap tape to the wrapped mandrel to create a shrink wrapped mandrel with an overlap that is secure at one end with a tape;
• heating the shrink-wrapped mandrel at approximately one seventy-five degrees Fahrenheit to elevate the viscosity of a resin of the plurality of plies to create an uncured shaft;
• bending the un-cured shaft in a pipe bender at a first angle and then at a second angle to create an uncured bent shaft;
• heating the uncured bent shaft in a vertical position at approximately three hundred degrees Fahrenheit for at least ten minutes to create a cured bent shaft, wherein the release film coated shrink wrap tape applies approximately 8.5 pounds of force during the curing process;
• cooling the cured bent shaft to room temperature and removing the mandrel from a finished composite shaft and reinforcement tip to create a final bent composite shaft;
• wherein the final bent composite shaft has a first angle A2 at a first bend relative to a first straight portion that ranges from 20 to 25 degrees and a second angle A3 at a second bend relative to a second straight portion that ranges from 12 to 16 degrees.