Golf ball comprising a colorless coating surrounding and adjacent to a TiO.sub.2 white-pigmented layer comprising a polymeric composition that comprises throughout: (i) passivated TiO.sub.2 particulates amount of from about 1 wt. %-10 wt. % based on total weight of second polymeric composition; and (ii) silane-containing adhesion promoter(s), for example, organosilanes and/or organosiloxanes in an amount of from about 0.1 wt. % to about 5.0 wt. % of the total weight of the polymeric composition. The coating comprises a coating composition that is different than the polymeric composition and does not contain any silane-containing adhesion promoter; and there is no surface treatment with adhesion promoter at an interface between the colorless coating and TiO.sub.2 white-pigmented layer. In lieu of the colorless coating, the golf ball may include a coating that is clear tinted or translucent.

An object with a tactile outer layer includes, for example, a ball having an outer surface and a series of protrusions or spikes on the outer surface. The protrusion each appear as a tear-dropped shape mass that includes a base having a relatively flat bottom adhered to the outer surface of the ball and a narrow tip and/or curved tail extending away from the outer surface. Manufacturing can be performed by mounting the object and utilizing injection arms that deposit elastomer globules on the object. The globules are deposited by pressure through a reservoir in the injection arm and the injection arms are then withdrawn to product the tail shape.

A matte golf ball which is free of luster and gloss has such a good ball appearance that the injection marks which form during injection molding of the cover are not visible. The golf ball includes a core of at least one layer, a cover of at least one layer, and a paint film. The outermost layer of the cover is formed of a resin composition which includes a thermoplastic resin and a colorant comprising a fluorescent dye or a fluorescent pigment, and has a visible light transmittance with an average value at wavelengths in the 380 to 780 nm spectrum of from 2.0 to 50.0%. The paint film is formed of a urethane-based paint composition containing delustering particles.

A leather-adhered baseball/softball, comprises a ball core, and a wrapping layer formed over the ball core by a mold, wherein the mold is engraved with raised lines of baseball/softball stitches, such that the molded wrapping layer has a raised baseball/softball stitch guide; the baseball/softball stitch guide is used to align a ball leather, such that the ball leather is aligned and adhered onto the wrapping layer except the baseball/softball stitch guide by an adhesive, so as to form a baseball/softball cover having the baseball/softball stitch guide; or the ball leather is aligned and molded on the wrapping layer except the baseball/softball stitch guide by a mold from a formulated leather raw material, so as to form a baseball/softball cover having the baseball/softball stitch guide. Also disclosed is a method for manufacturing a leather-adhered baseball/softball.

A leather-adhered baseball/softball, comprises a ball core, and a wrapping layer formed over the ball core by a mold, wherein the mold is engraved with raised lines of baseball/softball stitches, such that the molded wrapping layer has a raised baseball/softball stitch guide; the baseball/softball stitch guide is used to align a ball leather, such that the ball leather is aligned and adhered onto the wrapping layer except the baseball/softball stitch guide by an adhesive, so as to form a baseball/softball cover having the baseball/softball stitch guide; or the ball leather is aligned and molded on the wrapping layer except the baseball/softball stitch guide by a mold from a formulated leather raw material, so as to form a baseball/softball cover having the baseball/softball stitch guide. Also disclosed is a method for manufacturing a leather-adhered baseball/softball.

Golf ball comprising dimple(s) incorporating three or more linear channels having the same channel length L and same channel width CW; all linear channels extend radially outward from a centroid of the dimple toward a perimeter of the dimple without intersecting the dimple's centroid. Each linear channel may extend radially outward from a location on the dimple that is a distance Cd from the dimple's centroid, wherein Cd>0. Alternatively, at least one of the three or more linear channels has a different channel length L and/or a different channel width CW than at least one other linear channel. Dimple may have circular or non-circular plan shape; channels may not intersect each other; at least one linear channel may intersect the dimple's perimeter; and linear channels may be spaced by n separation angles .sub.S, wherein n is number of linear channels, which may be equal, or at least two differ.

Golf ball comprising dimple(s) incorporating three or more linear channels having the same channel length L and same channel width CW; all linear channels extend radially outward from a centroid of the dimple toward a perimeter of the dimple without intersecting the dimple's centroid. Each linear channel may extend radially outward from a location on the dimple that is a distance Cd from the dimple's centroid, wherein Cd>0. Alternatively, at least one of the three or more linear channels has a different channel length L and/or a different channel width CW than at least one other linear channel. Dimple may have circular or non-circular plan shape; channels may not intersect each other; at least one linear channel may intersect the dimple's perimeter; and linear channels may be spaced by n separation angles .sub.S, wherein n is number of linear channels, which may be equal, or at least two differ.

The present invention is a golf ball which comprises spherical-cosine dimples on the surface thereof. The spherical-cosine dimples have a cross-sectional shape defined by the superposition of a spherical function and a cosine function. Each of the spherical-cosine dimples preferably has a dimple diameter of 0.180 inches or greater.

A golf ball dimple pattern based on a square dipyramid, i.e., two square pyramids connected base-to-base, is disclosed. The dimples are arranged within four substantially identical triangular sections on each of two substantially identical hemispheres of the ball.

The present invention relates to two integrated billiard balls for training, which include an image ball and an object ball assembled together by a connecting means and integrated through spherical contact therebetween so that, at the time of billiard training, a trainee can figure out a situation in which the trainee can hit the object ball coupled to the image ball of the training billiard balls, with a predetermined thickness, just by accurately hitting a cue ball while aiming the center of the image ball. Therefore, the present invention enables a trainee to easily practice thickness adjustment of an object ball and thus improve his or her billiard capability.