Games using tangible projectile – Golf – Ball
Patent
1997-04-16
1999-05-11
Marlo, George J.
Games using tangible projectile
Golf
Ball
473377, 473378, 473383, A63B37/12;37/14
Patent
active
059021900
ABSTRACT:
A golf ball includes a coating layer which has a thickness of 50-700 .mu.m and is formed at the surface portion of the golf ball. When a three-piece golf ball, for example, is prepared, a solid core is enclosed with a cover material having a two-layer structure composed of inner and outer cover layers, and mark stamping is then performed on the cover material. Subsequently, a transparent coating layer having a thickness of 50-700 .mu.m and made of a thermoplastic resin is formed as an outermost layer. It is possible to impart a desired surface hardness and surface friction coefficient to the golf ball without taking account of the overall structure of the golf ball and the relationship between the hardness of the core and the hardness of the cover, thereby increasing the degree of freedom in designing of the golf ball, especially, in designing of the surface hardness and the surface friction coefficient. The coating layer is formed by dispersion coating using a water system emulsion prepared by dispersing a thermoplastic urethane resin powder in water.
REFERENCES:
patent: 3177280 (1965-04-01), Ford et al.
patent: 5506004 (1996-04-01), Maruoka et al.
patent: 5669831 (1997-09-01), Lutz
patent: 5743818 (1998-04-01), Maruoka et al.
patent: 5744549 (1998-04-01), Lutz
Ihara Keisuke
Inoue Michio
Kasasima Atuki
Masutani Yutaka
Shimosaka Hirotaka
Bridgestone Sports Co. Ltd.
Marlo George J.
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