Appeal No. 2004-0242 Page 5
Application No. 09/873,594
Nesbitt then teaches in the DISCLOSURE OF THE INVENTION section of the
patent (column 1, line 36, to column 2, line 9) that:
In accordance with the present invention there is provided a golf ball
having a multilayer or two-ply cover construction for a solid resilient center or
core wherein the multilayer cover construction involves two stage molded cover
compositions over a solid center or core of resilient polymeric material wherein
an increased coefficient of restitution is attained and wherein the "feel" or playing
characteristics are attained similar to those derived from a balata covered golf
ball.
The invention embraces a golf ball and method of making same wherein
the ball has a solid center or core of resilient polymeric or similar material
covered by a first layer or ply of molded hard, highly flexural modulus resinous
material or of cellular or foam composition which has a high coefficient of
restitution.
The first layer or ply is provided with a second or cover layer of a
comparatively soft, low flexural modulus resinous material or of cellular or foam
composition molded over the first layer and core or center assembly. Such golf
ball has the "feel" and playing characteristics simulating those of a softer balata
covered golf ball.
Through the use of the first ply or layer of hard, high flexural modulus
resinous material on the core or center, a maximum coefficient of restitution may
be attained. The resinous material for the first ply or layer may be one type of
Surlyn marketed by E. I. du Pont de Nemours and Company of Wilmington, Del.,
and the other ply or cover layer may be of a different type of Surlyn resin also
marketed by the same company.
The three-piece golf ball of the invention provides a golf ball in which the
coefficient of restitution of the golf ball closely approaches or attains that which
provides the maximum initial velocity permitted by the United States Golf
Association Rules of two hundred fifty feet per second with a maximum tolerance
of two percent, which velocity may be readily attained and the playing
characteristics or "feel" associated with a balata covered ball secured while
maintaining a total weight of the golf ball not exceeding 1.620 ounces without
sacrificing any advantages of a golf ball having a standard Surlyn cover of the
prior art or a golf ball having a softer balata cover.
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