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AssigneeBridgestone Sports Co., Ltd.
InventorsAtsuki Kasashima, Keisuke Ihara, Hirotaka Shimosaka, Yutaka Masutani, Michio Inoue
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A golf ball is molded in a mold comprising a pair of removably joined mold sections. The golf ball has a plurality of dimples, the dimples being arranged in a polyhedral arrangement. The golf ball is free of a great circle which does not intersect with the dimples. The dimples (D2) lying across the parting line (P) between the mold sections, except for the dimples (D1) whose center lies on the parting line, are shifted upward or downward from the parting line or reduced in diameter so that these dimples are located outside the parting line (P). The dimple surface coverage is at least 71%. A golf ball having high symmetry and excellent flight performance can be prepared using a simple mold.
A golf ball which is molded in a mold having a pair of mold sections which are removably joined to define a spherical cavity therein, said golf ball having a parting line at the junction between the mold sections, two to six types of dimples having different diameters within a range of 1.8 to 5 mm arranged on the surface of said golf ball, the dimples being arranged in a polyhedral arrangement selected from octahedral, dodecahedral and icosahedral arrangements so that the golf ball is free of a great circle which does not intersect with the dimples and some of the dimples lie across the parting line, wherein
A method of arranging two to six types of dimples having different diameters within a range of 1.8 to 5 mm on the surface of a golf ball which is molded in a mold having a pair of mold sections which are removably joined to define a spherical cavity therein so that the surface coverage of the dimples is at least 74%, the golf ball having a parting line formed at the junction between the mold sections and some of the dimples lying across the parting line, the method comprising the steps of:
Dependencies are inferred from the claim text.