Patent ID: 8652285

Claim:
A method for producing a baseball or softball, comprising the following steps: (a) firstly forming an independent spherical core; (b) attaching a fiber material layer with a porous structure on the outer surface of the spherical core, and the fiber material layer being then evenly brushed with a layer of polyurethane (PU) to penetrate into the fabric material to form a composite layer; (c) placing the spherical core into two pieces of ball cover molds, wherein the ball cover molds are constructed from two corresponding figure of 8-shaped mold pieces, the two mold pieces fitting together to form a ball cover, the two mold pieces made from a soft or flexible material and having two joining edges respectively joined to each other, an outer side at one joining edge formed with a stepped surface to engage with another stepped surface formed on an inside side at the other joining edge, and wherein on interior surfaces of the two mold pieces, grooves are set respectively along the two joining edges to form a raised sewn section on a surface of the ball cover so that a mold line on the ball cover formed by the mold pieces is exactly located on the center of the raised sewn section; (d) heating the two mold pieces with the spherical core enclosed inside for molding; and (e) finally removing the two mold pieces to reveal a complete shaped ball.