Patent ID: 6190597
Filing Date: 2001-02-20
Classification: A63B,B29C,B29L

Abstract:
A method of manufacturing a golf ball having a core and a cover enclosing the core, the cover having at least one thin spherical layer with a uniform thickness of not more than 1.5 mm,said method comprising the step of injection molding a molding material uniformly around said core to cover said core with molding material satisfying formula (1):V.gtoreq.(a/t.sup.2)-b (1)wherein V is an injection molding material fill speed in cubic centimeters per second, t is a thickness of said at least one thin spherical layer in millimeters, a=0.04M.sup.2 -3.75M+137.5, and b=-1.49/M-0.57, and M is a melt flow rate in grams per 10 minutes at 190.degree. C. of said injection molding material for said at least one thin spherical layer.