Ball for baseball

Abstract

A ball for baseball is proposed which has properties similar to those of ordinary balls and superior in waterproofness. The ball for baseball has a layer of woolen yarn provided around a rubber core having a baked cork inside, and an outermost layer provided around the layer of woolen yarn through a layer of cotton yarn. The outermost layer is formed from a water-impermeable resin and the total weight is 142 to 148 g.

We claim:  
     
         1 . A ball for baseball comprising a baked cork, a rubber core around said baked cork, a layer of woolen yarn around said rubber core, a layer of cotton yarn around said layer of woolen yarn, and an outermost layer provided around said layer of cotton yarn, said outermost layer being formed from a water-impermeable resin and the total weight of the ball being 142 to 148 g.  
     
     
         2 . The ball for baseball as claimed in    claim 1    wherein in a machine test in which using a two-wheel type pitching machine having two urethane wheels, the ball is thrown at an initial velocity of 130 km/h, it can be repeatedly used at least 2500 times.  
     
     
         3 . The ball for baseball as claimed in    claim 1    or    2    wherein the degree of taper wear of said water-permeable resin is over 0 mg and 15 mg or under, and the softening temperature is 80 to 300°C.