ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,384,084, issued on Aug. 12, was assigned to NISSEI PLASTIC INDUSTRIAL Co. LTD. (Nagano-Ken, Japan).

"Resin switching assist method and apparatus for molding machine" was invented by Makoto Kozuka (Hanishina-gun, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "For each of different resins R, a zero shear viscosity Etao of each resin R is obtained by using a conversion function expression whose parameters are a melt flow rate (MFR) and a set temperature of a heating cylinder and is registered. Also, a purge resin required amount Wu corresponding to a viscosity difference Etad between the zero shear viscosity Etaof of a former resin Rf and the zero sh...