The present invention provides a method for arranging dimples on a golf ball surface in which the dimples are arranged in a pattern derived from at least one irregular domain generated from a regular or non-regular polyhedron. The method includes choosing control points of a polyhedron, generating an irregular domain based on those control points, packing the irregular domain with dimples, and tessellating the irregular domain to cover the surface of the golf ball. The control points include the center of a polyhedral face, a vertex of the polyhedron, a midpoint or other point on an edge of the polyhedron and others. The method ensures that the symmetry of the underlying polyhedron is preserved while minimizing or eliminating great circles due to parting lines.

A method for manufacturing a golf ball showing a great flight distance on driver shots for includes the steps of: preparing a rubber composition containing a base rubber, an ,-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, a crosslinking initiator and a carboxylic acid and/or a salt thereof; heat pressing the rubber composition at a press temperature ranging from t-40 C. to t-15 C. to mold a spherical core, wherein t C. is a one-minute half-life temperature of the crosslinking initiator; and forming at least one cover layer covering the spherical core.

A golf ball has a generally spherical surface and a plurality of dimples separated by a land area. At least one of the dimples has a perimeter edge connected to the land area and a dimple surface surrounded by the perimeter edge. The dimple surface has a plurality of channels and a plurality of channel edges that extend continuously from the perimeter edge to an intersection at a dimple center. The plurality of channels have at least a first type channel and a second type channel. The plurality of channel edges have a plurality of shared edges, wherein each shared edge is shared between a first type channel that is directly adjacent to a second type channel. Each shared edge extends radially from the dimple center to a terminal end and includes an intersection point therebetween. The portion of the shared edge that extends from the intersection point to the terminal end is an extension edge, and the extension edge is a portion of the perimeter edge.

The present invention provides a method for arranging dimples on a golf ball surface in which the dimples are arranged in a pattern derived from at least one irregular domain generated from a regular or non-regular polyhedron. The method includes choosing control points of a polyhedron, generating an irregular domain based on those control points, packing the irregular domain with dimples, and tessellating the irregular domain to cover the surface of the golf ball. The control points include the center of a polyhedral face, a vertex of the polyhedron, a midpoint or other point on an edge of the polyhedron and others. The method ensures that the symmetry of the underlying polyhedron is preserved while minimizing or eliminating great circles due to parting lines.

Disclosed herein are multilayer golf balls having a layer with a higher Shore C hardness and a lower Shore D hardness than another layer.

An object of the present invention is to provide a golf ball showing a low spin rate on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) an ,-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator and (d) a carboxylic acid having a heterocyclic ring and/or a salt thereof, provided that the rubber composition further contains (e) a metal compound in case of containing only (b) the ,-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent.

The present disclosure is generally directed to a dimple pattern for a golf ball. In one aspect, the present disclosure is directed to a specific arrangement of first and second domains each consisting of perimeter dimples and interior dimples. The dimples have at least six different dimple diameters, including a minimum dimple diameter, a maximum dimple diameter, and at least four additional dimple diameters. In a specific aspect, the perimeter dimples of the first domain have at least three dimple diameters, the perimeter dimples of the second domain have at least three dimple diameters, the interior dimples of the first domain have exactly three dimple diameters, and the interior dimples of the second domain have exactly three dimple diameters.

The present invention is directed to a golf ball having a non-planar parting line on its spherical surface. The non-planar parting line includes a plurality of arcuate segments, including at least one elliptical arc segment.

The present disclosure provides a dimple pattern having two different domains with two different shapes. Each of the domains have unique characteristics with respect to positioning of dimples along an interior and/or perimeter of the respective domains. Additionally, the number of dimple diameters among the domains have a specific set of relationships. In another aspect, the dimples are arranged within each domain according to a respective series of reference shapes, such as triangles and quadrilaterals.

A golf ball dimple pattern is disclosed herein that includes dimples having a variety of dimple diameters dispersed amongst two domains, which are tiled onto the outer surface of the golf ball. The dimple pattern has four dimple diameters appearing in only one of the two domains, yielding highly unique patterns in each, but where those dimples do not dominate the dimple configuration of their respective domains. Each domain has a different dimple diameter that appears most frequently, and that diameter also appears in the opposite domain. Various other aspects of the dimple pattern are disclosed herein.