Method of fastening an aluminium plate-type anode to the bottom of a tin covered with a protective coat, characterized by that on the metal sheet of the tin bottom (1) provided with a redrawing of an opening the flange thereof is turned inside the tin (1), thereupon the opening (5) of the anode plate (2) is laid and poured over with solder (7) until crowded flashes (9 and 10) are obtained which on cooling down the solder (7) are submitted to pressing by known means in order to flatten them.
