Patent ID: 7935288

Claim:
A method of making a golf ball comprising the steps of: forming a core having a core hardness; providing a roll stock comprising a first layer having a first hardness, a second layer having a second hardness, and a third layer having a third hardness, wherein at least one of the first, second, and third layers is formed of a thermoset material, wherein the thermoset material comprises a thermoset polybutadiene material and wherein at least one of the first, second, and third layers is formed from a thermoplastic material, and wherein the first, second, and third hardnesses differ by about 3 Shore D to about 20 Shore D, and wherein the first hardness is greater than the core hardness; heating the roll stock to a softening point; forcing the roll stock against a plurality of molds; cooling the plurality of molds; removing the roll stock from the plurality of molds to form a plurality of shells; positioning two of the plurality of shells to surround the core; and forming a cover from a castable reactive liquid material.