ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,149, issued on May 20, was assigned to 3D Systems Inc. (Rock Hill, S.C.).
"Method of manufacturing a three-dimensional article" was invented by David Sabo (San Diego).
According to the abstract* released by the U.S. Patent & Trademark Office: "A three-dimensional printing system includes a support plate and a resin vessel. The support plate defines a central opening and an upper surface. The resin vessel is disposed upon the upper surface of the support plate and includes a substructure and a transparent sheet. The substructure includes a vertical wall and a tension ring that extends inwardly and downwardly from the vertical wall. The tension ring impinges downwardly upon an uppe...