US Patent Issued to JFE STEEL on May 27 for "Cold rolling method and method for producing cold-rolled steel sheet" (Japanese Inventors)

ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,421, issued on May 27, was assigned to JFE STEEL Corp. (Tokyo).

"Cold rolling method and method for producing cold-rolled steel sheet" was invented by Kengo Tsukamoto (Tokyo) and Kenji Suzuki (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a cold rolling method by which the occurrence of wrinkles during cold rolling can be prevented without having to modify a mill. A cold rolling method of rolling a steel sheet in multiple rolling passes using a cold mill, the method including when the steel sheet unit tension N1 during steady-state rolling exceeds the reference unit tension N0 in a specific rolling pass in which the target sheet t...