ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,169, issued on July 21, was assigned to Seiko Epson Corp. (Tokyo).
"Plasticizing device and three-dimensional modeling apparatus" was invented by Kazuhide Nakamura (Asahi-mura, Japan) and Taki Hashimoto (Shiojiri, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A plasticizing device includes a screw having a groove formation surface with a groove and rotating around a rotation axis, a barrel having an opposed surface opposed to the groove formation surface in a direction along the rotation axis, with a communication hole for the plasticization material, a heater heating the material supplied, and a case housing the screw, wherein a first throug...