Bowling ball
OwnerJohn L. Randolphinventor
Life of this patent
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Abstract
A bowling ball has a surface made from a material containing a minor quantity of functionally terminated liquid elastomer combined with a major quantity of resin-forming material reactive with the functional end groups of the elastomer, and has a greatly enhanced coefficient of friction against ordinary bowling lane surfaces, permitting superior control of the path of the ball and therefore better scores by the bowler. Such surface compositions are preferably made from a liquid polyester resin of the type which is hardenable by a peroxide, with addition of a liquid vinyl-terminated diene polymer or copolymer in a quantity amounting to about 10% to 35% of the mixture.
Claims10
A bowling ball, the surface of which is composed of a matrix of hard, strong resin resistant to impact, containing domains of elastomeric material chemically bonded to the surrounding matrix.
A process of making a bowling ball of high hardness and high coefficient of friction which comprises mixing a liquid settable to a hard resin resistant to impact, with a functionally terminated liquid elastomer settable under the same influence, which materials are at least partially mutually soluble, and causing the mixture to set on the surface of a bowling ball.
Dependencies are inferred from the claim text.