ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,381, issued on Oct. 28.
"Sealing machine with notch-cutting function" was invented by Tzung-Han Wu (Tainan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A sealing machine with notch-cutting function is related to provide a frame on the notch-cutting component of the sealing machine. The center of the frame is pivoted with the base via a pivot shaft and has a first end and a second end on the left and right ends. A notch-cutting knife is fixed on the top surface of the first end. A spring having one end is fixed with the frame and the other end is fixed with the base and has a force to push the first end and the notch-cutting knife to move d...