ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,741,307, issued on Sept. 22, was assigned to JFE STEEL Corp. (Tokyo).
"Press forming method" was invented by Yusuke Fujii (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A press forming method for suppressing wall camber of a side wall portion due to springback of a press-formed product including a top portion, the side wall portion and a flange portion includes: a first forming step of press-forming a preformed part including a flange portion having height continuously changed in an axial direction to have a concave shape, a convex shape or a concavo-convex shape more largely than a target shape of the press-formed product in a height direction ...