The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 1999
Filed:
Apr. 16, 1997
Yutaka Masutani, Saitama, JP;
Keisuke Ihara, Saitama, JP;
Hirotaka Shimosaka, Saitama, JP;
Michio Inoue, Saitama, JP;
Atuki Kasasima, Saitama, JP;
Bridgestone Sports Co., Ltd., Tokyo, JP;
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.