ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,420,536, issued on Sept. 23, was assigned to TOYOBO Co. LTD. (Osaka, Japan).
"Multilayer body, and package using same" was invented by Wakato Tomatsu (Inuyama, Japan), Tadashi Nishi (Inuyama, Japan) and Tomoya Nishiki (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a multilayer body having favorable thermal dimensional stability and capable of producing a food-packaging bag where without providing any perforations or guiding lines through laser half-cutting, a resistance at opening by tearing is low, and only a small extent of parting occurs; and a step is formed between opening ends on the front and back sides to be easily ope...