ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,535,448, issued on Jan. 27, was assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC (Detroit).

"In-line quality inspection of metal foils during production" was invented by Ratandeep Singh Kukreja (Auburn Hills, Mich.) and Michael P. Balogh (Novi, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system for inline inspection of an elongate strip of metal foil includes at least one pair of opposed conductive rollers each having a surface of dielectric material thereon, and a circuit electrically connecting the rollers, and a sensor for detecting changes in the capacitance between the rollers. A method of inspecting metal foil includes passing the metal ...