Patent ID: 6793597
Filing Date: 2004-09-21
Classification: A63B

Abstract:
A sports bail comprising:a ball cover having a valve hole defined therein and a plurality of panels connected edge to edge by machine sewing to form a spherical shape, each of said panels having a polygonal shape and being made of a material selected from the group consisting of leather and synthetic leather; a spherical rubber bladder disposed inside said ball cover, said bladder having an outer surface coated with a silicon release layer; a valve stem mounted on said bladder and extending through the valve hole of said ball cover; a hardened web layer surrounding and separated from said bladder coated with the silicon release layer, such that the bladder is allowed to float inside the ball cover relative to said hardened web layer said hardened web layer being formed from strengthened yarn impregnated with an adhesive that is wound evenly around the bladder precoated with a silicon releasing agent and subjected to vulcanization in a mold; whereby the silicon releasing agent melts during the vulcanization to coat the outer surface of the bladder with the silicon release layer to prevent adherence of the bladder to the hardened web layer.