Abstract:
A golf ball has dimples arranged in eight spherical equilateral triangles obtained by projecting, on the imaginary spherical surface of the golf ball, the ridge lines of a regular octahedron inscribing the imaginary spherical surface. Three great circles corresponding to the ridge lines being projected on the spherical surface. One great circle coinciding with a mold seam is formed as the sole great circle unintersecting dimples and the other two great circles intersect dimples. Between 300 to 550 dimples are formed in the golf ball with the dimples being equivalently arranged in each of the eight spherical equilateral triangles.
Abstract:
A golf ball with dimples disposed in a regular octahedral arrangement having a superior symmetrical property so as to arrange dimples symmetrically in each of numerously divided regions without deteriorating the symmetrical property of the golf ball and by varying volumes of dimples adjacent to each other at a specified ratio with diameters thereof equal to each other, thereby to provide a symmetrical property and uniformity for flying a long distance.
Abstract:
A golf ball which comprises a spherical surface having a parting line at its equator and having a plurality of dimples formed thereon,wherein the dimples are formed so that the ratio, y, of the sum total of the flat surface area of the dimples to the surface area of the same sphere having no dimples formed thereon is within the range((0.046) (X).sup.1/2 -0.172)+0.04.gtoreq.Y.gtoreq.((0.046)(X).sup.1/2 -0.172)-0.04wherein X represents the total number of dimples;and wherein a dimple lying within a region S, which extends from 30.degree. below the parting line to 30.degree. above the parting line, has a value VS, and a dimple of the same diameter only lying within the region P, which comprises the surface of the sphere that is not within region S, has a volume VP, such that the ratio of the volumes of dimples having the same diameters but in different regions is within the range of;1.02.ltoreq.VS/VP
Abstract:
A golf ball provided with two to four different sizes of dimples in the form of a 20-12 hedron and having different diameters from each other which vary in a ratio of 1.25-1.50, with the dimples being equally spaced over the entire surface of the golf ball, such that the flow of the air at every cross section crossing at right angles to the rotational axis of the golf ball is made equal, and at the same time, the angular difference between separation points of the dimples is minimized.
Abstract:
An apparatus for removing the burr from the seam of a golf ball made using a pair of semispherical molds each having dimple-forming projections on a connecting portion to shape resin into a golf ball having dimples on a seam corresponding to the connecting portion. A ball fixing mechanism holds the golf ball thereto with the seam uncovered. A cutting member having a cutting member, disposed at an end of a rotary shaft, having a radius of curvature smaller than a sectional radius of curvature of each of the dimples. The rotary shaft rotates on its axis and moves forward when the cutting member is brought into contact with each of the dimples on the seam and backward when the cutting member is brought into contact with a convex land thereon. Thereafter, the cutting member is pressed against the seam successively removing the burr while maintaining the integrity of each of the dimples.
Abstract:
A golf ball having a plurality of dimples on a surface thereof characterized in that more than 40% of all dimples are polygonal in shape and have a double slope in section having a straight first slope and a straight second slope continued radially inwardly from the first slope, and the gradient of the first slope of said double slope disposed in the vicinity of a dimple edge is greater than that of the second slope disposed in the vicinity of the bottom thereof.
Abstract:
In a golf ball having dimples and lands other than the dimples formed on the surface thereof, dimples are arranged so that less than 40 lands are provided which contain a rectangle having a short side greater than 0.4 mm and an area greater than 0.8 mm.sup.2 and not including a part of the dimple or the whole thereof. A land having the greatest area of all lands is so small that a dimple having an area greater than the average area of all dimples cannot be formed therein.
Abstract:
A golf ball having circular dimples and noncircular dimples arranged in different percentages depending on the spherical zones, whereby a favorable aerodynamic property is obtained by eliminating the difference in trajectories between line hitting and face hitting.
Abstract:
A gold (Au) thick film land constituting a wire bonding electrode is formed by printing and sintering a gold (Au) thick film paste previously added with copper (Cu) to overlap with a copper (Cu) thick film which is formed as a wiring layer on a ceramic substrate. A semiconductor part mounted on the substrate and the gold (Au) thick film land are directly connected by a gold (Au) wire thereby electrically connecting the semiconductor part and the copper (Cu) thick film. In forming the gold (Au) thick film land, the gold (Au) thick film paste previously added with copper (Cu) is used. Therefore, disconnection caused by the Kirkendoll phenomenon is restrained and stable bonding between the copper (Cu) wiring layer and the gold (Au) thick film land can be achieved.