A method and system for determining concentricity of a multiple layer golf ball are disclosed herein. One or more images of a golf ball are generated using an X-ray source, a camera or a digital detector, and an image intensifier. An edge detection algorithm is preferably utilized. The method also includes calculating Y,Z center coordinates of the a best fit diameter or ellipse of the inner edge layer and outer edge layer of the multiple layer golf ball.

A tennis ball sorting apparatus tests the internal pressure of individual tennis balls and automatically separates a large number of tennis balls based on their internal pressure. Methods of using the same are further provided.

A golf ball with at least one layer having radio-opaque fillers is disclosed herein. The at least one layer comprises from 1.0% to 25% by weight of a radio-opaque filler. The at least one layer has a pixel value gradient of 0.75 or less from an inner edge to an outer edge of the at least one layer when examined with a radiographic imaging system.

An apparatus having a control circuit including a computer processor and a computer memory configured with computer software. The control circuit causes a first test assembly to conduct an initial test of the air pressure within an inner chamber of a first tennis ball; and if the control circuit determines that the air pressure is below a threshold, a pressurization process increases the air pressure inside the inner chamber of the first tennis ball by piercing the outer skin of the first tennis ball with a needle, until a tip of the needle is in the inner chamber, and a first opening, plugged by the needle, is formed in the outer skin of the first tennis ball. The needle tip is thereafter withdrawn from the inner chamber of the first tennis ball, leaving the first opening unplugged and sealant is applied to the first opening to close the first opening.

An object of the present disclosure is to provide a golf ball having an increased spin rate when being hit with an 8-iron while suppressing rise in a spin rate when being hit with a driver. The present disclosure provides a golf ball comprising a spherical core having an inner core and an outer core, and a cover positioned outside the spherical core, wherein A?a is 12,200 or less and B?b is 20,400 or more, where a represents an average hardness (Shore C) of a hardness (H2.5) at a point of 2.5 mm from a center of the spherical core and a hardness (H5) at a point of 5 mm from the center of the spherical core, b represents an average hardness (Shore C) of a hardness (H7.5) at a point of 7.5 mm from the center of the spherical core and a hardness (H9) at a point of 9 mm from the center of the spherical core, A represents an impulse difference (kN.Math.?s) between a back spin impulse and a top spin impulse measured using a contact force tester under a condition corresponding to a condition when the golf ball is hit with a driver, and B represents an impulse difference (kN.Math.?s) between a back spin impulse and a top spin impulse measured using a contact force tester under a condition corresponding to a condition when the golf ball is hit with an 8-iron.

A system for selecting a golf ball comprises a ballistics data input configured to receive ballistics data for a plurality of golf balls and for a plurality of launch conditions; a material data input configured to receive material measurement data for each of the plurality of golf balls; a data structure generation module configured to generate a data structure for each of the plurality of golf balls based on the ballistics data and measurement data; an indexing module configured to index the data structures relative to each other; a interactive feedback module configured to solicit and receive launch monitor data and preferences; a modeling module configured to generate a performance model based on the launch monitor data and preferences; and a selection module configured to select one of the plurality of golf balls based on the index and the performance model.

A golf ball 2 includes a main body 4 and a paint layer 6 positioned outside the main body 4. The main body 4 includes a spherical core 8, a mid layer 10 positioned outside the core 8, and a cover 12 positioned outside the mid layer 10. An indentation depth, measured when the paint layer 6 in a cross-section along a plane passing through a central point of the golf ball 2 is pressed by a force of 30 mgf in a direction perpendicular to the cross-section, is not less than 300 nm and not greater than 3000 nm. The paint layer 6 preferably has a thickness of not less than 5 m and not greater than 50 m.

A system for selecting a golf ball comprises a ballistics data input configured to receive ballistics data for a plurality of golf balls and for a plurality of launch conditions; a material data input configured to receive material measurement data for each of the plurality of golf balls; a data structure generation module configured to generate a data structure for each of the plurality of golf balls based on the ballistics data and measurement data; an indexing module configured to index the data structures relative to each other; a interactive feedback module configured to solicit and receive launch monitor data and preferences; a modeling module configured to generate a performance model based on the launch monitor data and preferences; and a selection module configured to select one of the plurality of golf balls based on the index and the performance model.

A system for measuring and displaying the pressure of conventional American-style footballs in real time to game officials and spectators continuously. The value of the football's pressure is measured by physical contact with a Durometer and calculated using a CPU configured with software. Game officials may view the football's pressure locally. A transceiver device continuously transmits the value of the football's pressure, ID, time and date to remote receivers where game officials and spectators may continuously monitor the football's pressure remotely.

A hand-held compression-tester for golf balls applies a biasing force to the golf-ball, loads it, and then releases the load so that only the biasing force remains. Based on the evolution of a loading curve during these intervals, the compression-tester estimates a compression value.