초록 ▼

In order to improve a touch, this invention provides a ball of the inflatable type comprising a rubber tube used as a ball substrate which is introduced with gas under pressure therewithin, a reinforcing winding layer formed by simultaneously winding the combination of a nylon thread and either an e

In order to improve a touch, this invention provides a ball of the inflatable type comprising a rubber tube used as a ball substrate which is introduced with gas under pressure therewithin, a reinforcing winding layer formed by simultaneously winding the combination of a nylon thread and either an elastic rubber or urethane elastomer thread around the outer periphery of the rubber tube, and a surface cover layer made of a natural or synthetic leather stock which covers the reinforcing winding layer therewith through an adhesive with or without interposing an intermediate rubber layer formed by molding and vulcanization on the peripheral surface of the reinforcing winding layer.

대표청구항 ▼

A ball of the inflatable type consisting essentially of a hollow rubber tube used as a ball substrate which is inflated with a gas under pressure, a reinforcing thread winding layer formed by winding a reinforcing nylon filament thread and a rubber thread simultaneously with each other along the out

A ball of the inflatable type consisting essentially of a hollow rubber tube used as a ball substrate which is inflated with a gas under pressure, a reinforcing thread winding layer formed by winding a reinforcing nylon filament thread and a rubber thread simultaneously with each other along the outer periphery of said rubber tube, and a surface cover layer covering said reinforcing thread winding layer therewith through an adhesive, said surface cover layer being made of a natural or synthetic leather stock.