ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,539,991, issued on Feb. 3.
"Method and system for closing a receptacle" was invented by Paul Po Cheng (London, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of closing an open end of a receptacle having a wall with an inner wall surface. The method includes providing an end element including an internal portion thereof formed for at least partial engagement thereof with the wall. One or more heating elements are provided, for heating a heated layer of the internal portion to a hot working temperature in an inert atmosphere. When the heated layer is at the hot working temperature, an engagement part of the heated layer is engaged with a p...