Metallic container having a circumferential bonded portion and process for production thereof

A process for producing a metallic container by lap-bonding a first and a second section each composed of a primer-coated metallic cup-like fabricated article at their circumferential open end portions by means of a thermoplastic film-like adhesive, which comprises:

• a fabricating step of producing the first and second sections so that the inside diameter of the open end portion of the first section becomes nearly equal to the outside diameter of the open end portion of the second section;
• rotating said second section about the central axis thereof;
• feeding a length of the film-like adhesive to a heat adhering site along the periphery of the open end portion of the rotating second section;
• an adhering step of heat-adhering the film-like adhesive to the peripheral surface of the open end portion of the second section, said adhering step comprising a preheating step of substantially uniformly preheating the open end portion of the second section along the circumference thereof to a temperature near the lower limit of temperatures at which the film-like adhesive can be heat-adhered, and a heat-adhering step of, immediately after the foregoing preheating step, heat-adhering the film-like adhesive to the open end portion of said second section at the heat adhering site by locally heating said open end portion of the second section by a high frequency heating coil while keeping said second section rotating about its central axis so that the open end portion of the second section at the heat-adhering site attains said temperatures at which the film-like adhesive will be heat-adhered;
• and
• a bonding step of fitting the open end portions of the first and second sections and bonding them.