US Patent 7854076 Sports shoe and method of its manufacture

A sports shoe is proposed which comprises an upper and a sole, the latter having its bottom side provided with a pattern of traction assisting means for penetrating the surface of a lawn or hard court, in which the walking sole is directly bonded to the interior of the upper by injection-molding for reducing the weight and simultaneously maintaining the mechanical strength and flexibility, and only the traction assisting means project towards outside through the upper. For producing the sports shoe, there is proposed a method in which the upper is formed such that it extends across the entire sole surface area, and the upper material is provided in the region of the sole surface area with through holes in the form of a pattern which corresponds to the desired pattern of the traction assisting means, and in which the sole is directly bonded to the upper material by means of the injection-molding method in such a manner that the traction assisting means are also formed in this process and project through the through holes of the upper material towards outside.