A method for forming an easy-open closure in a sheet metal container, especially intended to contain liquids, characterized in that it comprises a first phase consisting of forming a convexity in a zone of the sheet metal container, and dividing or cutting at least partially a part of the metal sheet in said convex zone to provide a free edge, at least a portion of said convexity being practically outside said portion, defining the free edge of the metal sheet of which said portion remains at least partially divided, an opening, and forming said split portion, a closing element for said opening then taking place another operation consisting of reducing the size of said opening by means of the operation of at least partially flattening said convexity, proceeding next to place at least a part of the free edge portion of the closure element and the edge free defining the opening or the inner surface of the metal sheet adjacent to said opening in contact superposed to a minimum proximity in superposition. (Machine-translation by Google Translate, not legally binding)
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