ALEXANDRIA, Va., March 24 -- United States Patent no. 12,583,161, issued on March 24, was assigned to NISSEI PLASTIC INDUSTRIAL Co. LTD. (Nagano-Ken, Japan).
"Injection molding method and injection molding machine" was invented by Hirofumi Murata (Hanishina-gun, Japan) and Kenichi Hayashi (Hanishina-gun, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A predetermined mold gap is provided beforehand between a movable mold and a stationary mold of a mold by a mold clamping device. A mold clamping pressure is set to zero, and a predetermined back pressure is set for the movable mold. Subsequently, the injection device is caused to start injection of the molten resin into the mold for which the mold gap, th...