Patent ID: 7708657

Claim:
A method of the production of a golf ball which comprises: a first step in which a spherical center is formed; a second step in which a mid layer material including a thermoplastic resin and having a melting point of equal to or greater than 95° C. is prepared; a third step in which said center is covered by said mid layer material to form a mid layer; a fourth step in which a material for a cover comprising a thermoplastic resin is prepared; a fifth step in which a half shell is formed by said cover material; a sixth step in which a core comprising said center and said mid layer is covered by two half shells and placed into a mold having numerous pimples; and a seventh step in which said core and said half shells are compressed and heated in the mold, said pimples form dimples on the surface of the cover, and said pimples simultaneously form recessed parts on the mid layer which correspond to all the dimples, and a cover is formed having a thickness Td immediately below the deepest site of each dimple being greater than a difference between a nominal thickness Tc and a depth of each dimple (Tc−Dp).