ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,872, issued on April 21, was assigned to PLA GIKEN Co. LTD. (Osaka, Japan).
"Multi-lumen tube extrusion molding apparatus" was invented by Yoshiharu Kikuzawa (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an extrusion molding apparatus capable of producing a multi tube with which an outer shape of a cross section is close to a perfect circle. The multi-lumen tube extrusion molding apparatus includes a resin supplying portion, a die that has an extrusion port at a lower end portion and molds the multi-lumen tube as the resin supplied from the resin supplying portion is extruded vertically downward, and an outer surface mold...