US Patent Issued to NIPPON STEEL on Jan. 27 for "Die assembly and method for producing blank using the die assembly" (Japanese Inventors)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,533,723, issued on Jan. 27, was assigned to NIPPON STEEL Corp. (Tokyo).

"Die assembly and method for producing blank using the die assembly" was invented by Takashi Matsuno (Tokyo) and Akira Egami (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sheet-shaped blank (10) for press forming is produced by shearing a metal sheet (30). The blank (10) includes a sheared edge (14), which includes a sheared surface (14b) and a fractured surface (14c) in the sheet thickness direction and has a loop shape in plan view. In plan view, an edge of the sheared edge (14) includes concavely curved portions (20). The average of lengths of the fractured surface (14c...