Molten Corporation

Hidesuke Kuriki

Yukinori Nagao

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.

Producing method of ball for ball game

The present invention provides a ball for ball games which has equivalent or increased cushioning properties when compared conventional balls. The ball for ball games of the present invention includes a bladder made of rubber or elastomer, and a foamed layer covering the outside of the bladder, in which a skin layer is provided on each surface sectionalized by partition portions extending from the surface of the foamed layer, the partitions having a lesser degree of expansion than the main portion of the surface which is sectionalized by the portions.

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Hiroshima, Japan

Hidesuke Kuriki