Abstract: A method is disclosed for producing an electric deposition foil producing drum for producing an electrically deposited metallic foil having a high quality. An opening tip end portion (14) opened toward the inside is formed in an inner surface portion of a joint portion (13) of an outer skin (12) made from a planar material in the form of a cylinder. The opening end portion (14) is welded from inside, and subsequently, the welded portion (15) and a portion close to the welded portion are bulged outwardly. A layer is welded in a recess (17) formed by the bulging work while cooling the outer surface of the outer skin. Subsequently, the welded layer is peened under a hot or cold work. Subsequently, the peened portion (18) is annealed. It is possible to obtain further advantages by using a welding means which does not require a welding rod for the welding of the joint portion (13).

Abstract: A drum is rotatably immersed as a cathode in an electrolytic solution with an anode placed therein. When a current flow from the anode through the solution to the drum, a metal foil is deposited on the drum as it rotates. The drum includes an electric insulating layer disposed between the outer circumferential surface of an inner drum body and the inner circumferential surface of an outer skin, and an electrically conductive member attached to the outer skin and disposed on one axial end of the inner drum body.