US Patent 8163117 Producing method of ball for ball game

A producing method of ball for ball game including a ball cover and a bladder is disclosed. The method includes steps of (a) inflating a bladder and providing a web layer by coating at least a thread on an outer surface of the bladder thereafter, (b) fabricating a plurality of panels in a predetermined shape, (c) sewing the plurality of panels edge to edge together excluding a portion thereof by a sewing machine to form a ball cover including an inlet opening, (d) inserting the bladder obtained at step (a) into the ball cover obtained at step (c) through the inlet opening, (e) sewing the inlet opening of the ball cover, and (j) inflating the ball for ball game to a predetermined pressure within a shaping mold.