ALEXANDRIA, Va., July 3 -- United States Patent no. 12,343,799, issued on July 1, was assigned to IHI Corp. (Tokyo).
"Three-dimensional manufacturing apparatus" was invented by Riku Shimizu (Tokyo) and Yuichiro Nakayama (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A three-dimensional manufacturing apparatus includes a rotary drive unit that rotates a table around a rotation axis, a region setting unit that sets a plurality of divided regions obtained by dividing an irradiation region, a beam source that irradiates a powder material with an electron beam for each of the divided regions, and a rotation speed adjusting unit that adjusts a rotation speed of the table. An area per unit central angle of a...