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1. 发明专利

JP2001340498A METHOD FOR MARKING ON GOLF BALL 失效
公开(公告)号：JP2001340498A
公开(公告)日：2001-12-11
申请号：JP2000168389
申请日：2000-06-06
申请人： BRIDGESTONE SPORTS CO LTD
发明人： MASUTANI HIROSHI , IHARA KEISUKE
IPC分类号： A63B45/02 , A63B37/00 , A63B37/14 , B23K26/00 , B25H7/04 , B41J2/00 , B41J2/44 , B41M5/26
摘要： PROBLEM TO BE SOLVED: To provide a method for marking letters, marks, or the like, on the surface of a golf ball. SOLUTION: The method for marking on a golf ball is for displaying letters, marks, or the like, by irradiating laser beams on the surface of the outermost layer of the golf ball formed of a resin or rubber including 1-7 wt.% of a metal compound whose color can be changed with irradiated laser beams.

2. 发明专利

JP2001340493A GOLF BALL 失效
公开(公告)号：JP2001340493A
公开(公告)日：2001-12-11
申请号：JP2000168390
申请日：2000-06-06
申请人： BRIDGESTONE SPORTS CO LTD
发明人： MASUTANI HIROSHI
IPC分类号： A63B37/00 , A63B37/04 , A63B37/12
摘要： PROBLEM TO BE SOLVED: To provide a golf ball with both excellent carry performance and excellent hitting feel. SOLUTION: In the golf ball, a spherical elastic core is covered with a cover. The cover has a sandwich structure with a middle layer made of a relatively soft material located at the center in the thickness, put between an inner layer abutting to the hard core, and an outer layer with dimples on the outer surface. A large number of pores perforating the middle layer in the radial direction of the golf ball are distributed on the circumference of the middle layer, and the outer layer has a large number of projections on the inner surface. A part of the projections reaches the inner layer through the pores of the middle layer and is brought into face contact with the surface of the inner layer.

3. 发明专利

JP2001000584A SOLID GOLF BALL 失效
公开(公告)号：JP2001000584A
公开(公告)日：2001-01-09
申请号：JP17363699
申请日：1999-06-21
申请人： BRIDGESTONE SPORTS CO LTD
发明人： NAKAMURA ATSUSHI , YAMAGISHI HISASHI , MARUKO TAKASHI , MASUTANI HIROSHI
IPC分类号： A63B37/00 , A63B37/04 , C08L9/00 , C08L101/00 , C08L101/16
摘要： PROBLEM TO BE SOLVED: To provide a golf ball having a good hitting feel and hitting sound in combination and having excellent symmetricalness and durability by incorporating particles consisting of a material different from a solid core forming material into a solid core to form the solid core and forming these particles so as to have sp.gr. difference within a specific value and Shore D hardness higher than the surface hardness of the solid core. SOLUTION: The golf ball is formed of the solid core 1 and a cover 2 covering the solid core 1. The particles 3 are incorporated into the solid core 1. The particles 3 to be incorporated therein are formed of the material different from the material of the solid core 1. The material may be any materials, insofar as the material have the prescribed specific gravity. The sp.gr. of the particles 3 is required to be within ±0.1 in the difference from the specific gravity of the solid core (matrix)) 4. If the specific gravity deviates from this range, the symmetricalness of the ball is lost and the desired symmetricalness cannot be obtained. The specific gravity difference referred to here may be such that the specific gravity of either of the solid core 1 or the particles 3 may be larger. The particles 3 have the hardness higher than the surface hardness of the solid core 1.

4. 发明专利

JP2001000583A SOLID GOLF BALL 失效
公开(公告)号：JP2001000583A
公开(公告)日：2001-01-09
申请号：JP17363599
申请日：1999-06-21
申请人： BRIDGESTONE SPORTS CO LTD
发明人： NAKAMURA ATSUSHI , YAMAGISHI HISASHI , MARUKO TAKASHI , MASUTANI HIROSHI
IPC分类号： A63B37/00 , A63B37/04
摘要： PROBLEM TO BE SOLVED: To provide a golf ball having a good hitting feel and hitting sound in combination by incorporating particles consisting of a material different from a solid core forming material into a solid core to form the solid core and forming these particles so as to have Shore D hardness higher by a specific value or above than the surface hardness of the solid core. SOLUTION: The golf ball is formed of the solid core 1 and a cover 2 covering the solid core 1. The particles 3 are incorporated into the solid core 1. The particles 3 to be incorporated therein are formed of the material different from the material of the solid core 1. The material may be any materials, insofar as the material have the prescribed hardness. The material may be formed of known thermoplastic resins, thermoplastic elastomers, etc. The Shore D hardness of the particles 1 is harder than >=10 than the surface hardness of the solid core 1 and is recommended to be preferably >=13, to be

5. 发明专利

JP2000350795A SOLID GOLF BALL 失效
公开(公告)号：JP2000350795A
公开(公告)日：2000-12-19
申请号：JP16468799
申请日：1999-06-11
申请人： BRIDGESTONE SPORTS CO LTD
发明人： NAKAMURA ATSUSHI , YAMAGISHI HISASHI , MARUKO TAKASHI , MASUTANI HIROSHI
IPC分类号： A63B37/04 , A63B37/00
摘要： PROBLEM TO BE SOLVED: To provide a solid golf ball for improving the initial velocity whether the head speed is high or low, and especially for improving the carry even when the head speed is low. SOLUTION: This golf ball has a multi-layered structure consisting of a solid core 1 with the innermost core 3 and at least one middle layer 4 to cover the innermost core 3 and a cover 2 to cover the solid core 1. The innermost core 3 rebounds less than 95 cm when it drops down naturally from the height of 120 cm, and the diameter of the innermost core 3 is 18 mm or smaller.

6. 发明专利

JP2000288122A GOLF BALL 失效
公开(公告)号：JP2000288122A
公开(公告)日：2000-10-17
申请号：JP9711799
申请日：1999-04-05
申请人： BRIDGESTONE SPORTS CO LTD
发明人： MASUTANI HIROSHI
IPC分类号： A63B37/00 , A63B37/04 , A63B37/12
摘要： PROBLEM TO BE SOLVED: To improve the hitting sensation and flying performance of a golf ball. SOLUTION: In the golf ball 1 with a spherical hard rubber core 2 covered with at least three layers of rubber or resin materail which are a first cover 3, a second cover 4 and a third cover 5 in this order from the inside, the second cover 4 has a large number of pores 7 opened radially outward, and the third cover 5 is provided on its inner surface with a large number of protrusions 9 extending into the pores of the second cover 4. The hardness of these covers is harder in the order of the first, second and third covers.

7. 发明专利

JP2000254254A MOLDING DIE FOR GOLF BALL AND GOLF BALL 失效
公开(公告)号：JP2000254254A
公开(公告)日：2000-09-19
申请号：JP5801299
申请日：1999-03-05
申请人： BRIDGESTONE SPORTS CO LTD
发明人： MASUTANI HIROSHI
IPC分类号： A63B45/00 , A63B37/00 , B29C45/14 , B29C45/33 , B29D99/00
摘要： PROBLEM TO BE SOLVED: To facilitate mold releasing after molding by separably connecting a specific number of segments each protruded with at least one lug on a cavity forming face to form a spherical cavity. SOLUTION: This golf ball injection molding die is formed with a lower die 1 and an upper die of the same type, and a spherical cavity 2 is formed with at least six segments 3. The lower die 1 is formed with at least three separable side segments 3a divided at three uniformly distributed positions separated by 120 deg. from each other along the peripheral direction of a die equatorial plane P. At least one lug 4 is protruded on the inner face of each side segment 3a, at least three lugs 4 on the lower die 1, and at least six lugs 4 on the whole die. The lugs 4 are preferably protruded toward the center of the cavity 2, and the mold releasing of a molding can be facilitated.

8. 发明专利

JPH11299932A GOLF BALL 失效
公开(公告)号：JPH11299932A
公开(公告)日：1999-11-02
申请号：JP12526798
申请日：1998-04-20
申请人： BRIDGESTONE SPORTS CO LTD
发明人： MARUKO TAKASHI , MASUTANI HIROSHI
IPC分类号： A63B37/00 , A63B37/04 , A63B37/12
摘要： PROBLEM TO BE SOLVED: To reconcile excellent flying distance with control performance by intruding a core or cover to an intermediate layer in a protruding projection form, and forming a protruding projection satisfying a specified hardness and a specified expression in the intermediate layer. SOLUTION: A solid core 2 is covered with an intermediate layer 3, and the intermediate layer 3 is covered with a cover 4. The protruding projection form is intruded from the core 2 to the intermediate layer 3 to form a protruding projection 2a in the intermediate layer, or the protruding projection form is intruded from the cover 4 to the intermediate layer 3 to form the protruding projection. The material constituting the protruding projection 2a has a Shore D hardness higher than the material constituting the intermediate layer 3 by 8 or more, and satisfies the expression L>π(EI/Aσb ) . In the expression, L represents the length of the protruding projection 2a (mm), A represents the sectional area of the protruding projection 2a, I represents the sectional secondary moment of the protruding projection 2a, E represents the Young's modulus of the material constituting the protruding projection 2a, and σb represents the yield strength of the material constituting the protruding projection 2a.

9. 发明专利

JPH1099468A GOLF BALL 失效
公开(公告)号：JPH1099468A
公开(公告)日：1998-04-21
申请号：JP27710996
申请日：1996-09-27
申请人： BRIDGESTONE SPORTS CO LTD
发明人： SHIMOZAKA HIROTAKA , IHARA KEISUKE , MASUTANI HIROSHI , INOUE MICHIO , KASASHIMA ATSUNORI
IPC分类号： A63B37/00 , B29C33/42 , B29C45/26 , B29L31/54
摘要： PROBLEM TO BE SOLVED: To ensure good symmetry and eliminate difference in the flying distance between the seam shot and pole shot. SOLUTION: A pair of split dies are separably joined to form a die in which a globe-shaped cavity is formed, where a parting line P is formed by the joining parts of the two dies, and a plurality of dimples D are formed on the parting line P in such a way as intersecting it, and otherwise, there are no major circles out of intersection with any dimple. In this golf ball, the mean of the spatial volume Vp of dimples D intersecting the line P is made greater than the mean of the spatial volume Vp' of dimples D outside of the line P.

10. 发明专利

JPH09299511A GOLF BALL AND ITS PRODUCTION 失效
公开(公告)号：JPH09299511A
公开(公告)日：1997-11-25
申请号：JP14223396
申请日：1996-05-13
申请人： BRIDGESTONE SPORTS CO LTD
发明人： MASUTANI HIROSHI , IHARA KEISUKE , SHIMOZAKA HIROTAKA
IPC分类号： A63B37/00 , A63B45/00 , B29D99/00 , B29D31/00
摘要： PROBLEM TO BE SOLVED: To make it possible to reproduce a design value at a high degree, to provide a golf ball with dimples having high-accuracy shapes and sharp edges and to prevent the degradation in the dimple accuracy and the variation in product quality by execution of deburring after dimple formation. SOLUTION: This golf ball has a cover 4 and a coating film 8 formed on this cover 4 and is formed with the dimples on the layer consisting of the cover 4 and the coating film 8. The coating film 8 is formed as a coating film of >=15μm thickness consisting of a material having the heat resistance higher than the heat resistance of the material of the cover 4 and having stretchability. In the production of this golf ball, the working of the dimples is executed at the molding temp. near the m.p. of the cover 4 by compression molding from above the coating film 8 after the formation of the coating film 8. The cover 4 consists of a resin having a softening point of 80 to 150 deg.C, an m.p. of >=180 deg.C and an MI (190 deg.C) of 0.5 to 50. The coating film 8 consists of a resin having a softening point of 80 to 150 deg.C, a.m.p. of >=200 deg.C, a stretching rate of 200 to 900% and a Young's modulus of 15 to 60MPa.

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