A golf ball of one aspect of the present invention includes a spherical core, one or more cover members to cover the core, and a coating layer to coat a cover member configuring an outermost layer of the one or more cover members. A plurality of dimples is formed in the cover member of the outermost layer. Roughness is produced on a surface of the coating layer after applying a coat over the cover member of the outermost layer. An average value Fa (mm) of maximum depths of the plurality of dimples and arithmetic average roughness Ra (μm) on the surface of the coating layer, satisfy a relational expression:
−1.5×Fa+0.8≦Ra≦−1.5×Fa+1.8.

Methods for coatings for golf balls, particularly golf balls having thermoplastic polyurethane covers, and the resulting finished balls are provided. The coating is preferably a topcoat comprising a polyurethane composition containing optical brighteners. The topcoat composition preferably comprises a low concentration of optical brighteners. For example, the concentration of optical brightener can be in the range of 0.01 to about 0.20 weight %. The optical brighteners provide the desired brightness to the golf ball without sacrificing color stability. Multi-piece golf balls having inner cores, outer cores, inner covers, and intermediate layers can be made. The finished ball with the topcoat has many advantageous physical and playing performance properties.

Golf balls having covers made of thermoplastic polyurethane compositions are provided. Multi-piece golf balls can be made. In one embodiment, the outer cover layer is formed from a composition comprising a thermoplastic polyurethane and polydimethylsiloxane compound. Functionalized polydimethylsiloxane compounds also can be used to treat thermoplastic polyurethane golf ball covers. The cover composition and surface coatings can further include catalysts, ultraviolet (UV)-light stabilizers, and other additives. The coating methods have many benefits and the finished balls with thermoplastic polyurethane covers have good physical properties.

A sports ball is configured to enhance detection of spin properties by radar. The ball includes a spherical body having a first reflectivity with respect to radiation generated by a radar to be used in detecting spin of the ball. In addition, the ball includes a plurality of markers. Each of the markers has a second reflectivity with respect to the radiation generated by a radar to be used in detecting spin of the ball. The second reflectivity is different from the first reflectivity. The markers are distributed on the ball so that every great circle extending around an exterior surface of the ball is within a distance d of a projection on the exterior surface of the ball of at least one of the markers. The distance d is less than a radius of the ball.

The present invention relates to a golf ball stamp, and more particularly to, a stamp, which can reduce manufacturing costs due to its simple structure and store ink inside, is easy and convenient to replace the rubber plate that prints a mark on a golf ball, and can print a mark clearly on the rough golf ball surface.

A light charger charges a plurality of luminescent balls to emit light for use in dim lighting. The charger is a housing subdivided into a hopper section, a transport and light charging section, and a base section. The transport and light charging section includes a transport assembly integrated with a light charging assembly, with the transport assembly configured to receive and transport luminescent balls from the hopper into and through the light charging assembly, which comprises at least one light source. The light source comprises at least one LED and an illuminating light panel interposed between the LED and the luminescent ball when operating. The base section comprises an ejection exit point for the charged luminescent ball to exit the light charging assembly and a sensor for activating the system to eject at least one luminescent ball.

A golf ball comprising at least one layer consisting of a non-isocyanate-containing polyurethane composition comprising the reaction product of: at least one amine or polyamine, having an average functionality of 2.0 or greater, and at least one cyclo-carbonate. The amine may be selected for example from the group consisting of: ethylenediamine, hexamethylenediamine, or tris(2-aimnoethyl)amine, or blends thereof; and the polyamine may be selected for example from the group consisting of polyoxypropylene diamines, polyoxypropylene triamines, and combinations thereof. The cyclo-carbonate may comprise for example bis(cyclo-carbonate). Other possible reaction products include: (i) the at least one amine or polyamine and at least one epoxy-cyclo-carbonate oligomer, wherein the non-isocyanate-containing polyurethane composition can be modified with at least one of acrylic or siloxane; or (ii) the at least one amine or polyamine and at least one cyclo-carbonated soybean oil; or (iii) at least one lignin-based polyamine and at least one cyclo-carbonated soybean oil.

A golf ball aligning device comprises a shaft having a first and a second end, a handle mounted to the first end and a head member mounted to the second end. The head member further comprises a ball opening extending through the height of the head member having a chamfered or rounded bottom edge to engage a golf ball. An alignment grid on the top face of the head member comprises a crosshair pattern centered with the ball opening. A golf ball engaged with the bottom edge may be manipulated and oriented relative to the alignment grid for setting the trajectory of a shot.

The present application relates to a mark ball special for a golf high-speed camera sensor. The mark ball includes a sphere. A mark portion is provided on a surface of the sphere, the mark portion includes a plurality of marks that are arranged along a circumferential direction of the sphere and shaped different from each other. A plurality of different marks are arranged on a golf mark ball such that a high-speed camera sensor can capture diversified images of the ball.

Provided is a golf ball liner for rapidly and exactly printing, on a golf ball, a putting line or a mark indicating the owner of the ball. The golf ball liner includes a housing having an inside space in which a golf ball is accommodated, a moving part mounted on the housing and configured to move toward or away from the golf ball, a supporter mounted in an inside space of the moving part, a stamp supported by the supporter and configured to move with the moving part and the supporter to print a putting line or mark on the golf ball, and a first detachable part formed on each of the stamp and the supporter and configured to couple or separate the stamp to or from the supporter.