Abstract: The invention relates to a method of producing corrosion-resistant and workable sheet metal consisting of uncoated steel sheets (1, 1?), comprising the following steps: —placing the steel sheets (1, 1?) in abutting relationship, —welding the or each joint groove (14) by butt joint welding by means of a welding beam (13) for forming a weld (2) along the respective joint groove (4), —thermal treatment of the or each weld (2) directly after or even during the forming of the weld (2) by means of an annealing beam (15), —full-surface coating of the joined steel sheets (1, 1?), including the or each weld (2), after cooling the welds (2), with a metallic coating.

Abstract: In a process for production of a lid ring (30) which can be connected to the can body, which borders a discharge opening (38) and has a heat-sealable coating (40) on which to form a can lid (50) a closing membrane (44) can be heat-sealed covering the discharge opening (38), a metal strip (12) with parallel side edges (14, 16) is formed into a tube (20) and the side edges (14, 16) are welded or glued parallel to the tube longitudinal axis (x). The tube (20) produced in this way is divided into tube sections (24) of equal length with cut edges (26, 28) lying in parallel planes. The tube sections (24) are formed into lid rings (30) where a first cut edge (26) is formed into an outer rim (32) for connection to a can body and the second cut edge (28) is curled away from the side intended for the heat-sealable coating (40). The heat-sealable coating (40) is applied to the finished molded lid ring.

Abstract: In a process for production of a lid ring (30) which can be connected to the can body, which borders a discharge opening (38) and has a heat-sealable coating (40) on which to form a can lid (50) a closing membrane (44) can be heat-sealed covering the discharge opening (38), a metal strip (12) with parallel side edges (14, 16) is formed into a tube (20) and the side edges (14, 16) are welded or glued parallel to the tube longitudinal axis (x). The tube (20) produced in this way is divided into tube sections (24) of equal length with cut edges (26, 28) lying in parallel planes. The tube sections (24) are formed into lid rings (30) where a first cut edge (26) is formed into an outer rim (32) for connection to a can body and the second cut edge (28) is curled away from the side intended for the heat-sealable coating (40). The heat-sealable coating (40) is applied to the finished molded lid ring.