Abstract:
A liquid center for an article and a method for making the same from a liquid reactive mass such as a polyvinyl chloride plastisol by forming the plastisol to spherical shape, e.g., in a mold, and then reacting the outer portion of the mass to form a solidified skin while leaving the inner portion liquid.
Abstract:
A method of manufacturing a pin bottom for use in combination with a bowling pin which has a central reduced shank at its butt end formed by an undercut at the juncture of the bottom surface and side surface of the pin, with the undercut forming a downwardly facing annular groove. The pin bottom comprises a flexible upper base member which embraces the shank and is positioned entirely at the uppermost areas of the groove and bonded thereto. A wear-resistant lower base member extends at its upper end into the groove and terminates at its lower end in a shoulder which defines a continuation of the bottom and side surfaces of the bowling pin. The two base members are mechanically interlocked to form the pin bottom and to releasably secure the lower base member on the bowling pin.