ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,118, issued on May 20, was assigned to Dongguan Jiaheng Toys Co. Ltd. (Dongguan, China).
"Method for processing PVC ball" was invented by Shaofeng Shi (Chuzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a method for processing a PVC ball, including: Step A: carrying out a first ball shaping of a PVC paste located inside a first mold using a roto-cast machine or a rotational molding machine, to produce a hollow PVC ball; Step B: charging a gas to an interior of the shaped ball, so that the ball has an external diameter equal to a diameter of an inner cavity of a second mold; and Step C: placing the gas-charg...