Provided are a cup made of metal and a method of manufacturing the same capable of reducing material costs and molding costs, preventing deformation while reducing weight, preventing a user's mouth or hand from touching an edge of a metal material, and preventing hygiene problems. A cup made of metal open on an upper surface side includes a bottom portion and a body portion, the cup including a curled portion at the tip end on an upper opening side of the body portion. The curled portion includes a curvature region from the body portion toward the tip end, and a section at least from the body portion to a lowermost portion of the curled portion in the curvature region has a radius of curvature that decreases stepwise or continuously.

A method of manufacturing a container made of metal, including a bottom portion and a body portion, being open on an upper face side, and having a shape in which the body portion expands outward toward the upper face side. The method includes a stretch forming step of expanding a diameter of a stepped cup body made of metal by operating a diameter expanding punch having a tapered pressing portion that is smaller in diameter than an inner diameter of the large-diameter cylindrical portion and larger in diameter than an inner diameter of the small-diameter cylindrical portion of the stepped cup body along a cylindrical axis direction from an opening side of the large-diameter cylindrical portion, in which the stretch forming step is performed at least once.

An infeed assembly for a necker machine includes a full inspection assembly wherein the full inspection assembly is structured to be coupled to a necker machine frame assembly.

A first aspect of the present invention provides a can container including: a can body of a cylindrical shape, and at least a surface coating layer, in which the surface coating layer is formed on at least a part of an outer peripheral surface of the can body, the surface coating layer has a resin component, and surface free energy of a surface of the surface coating layer is 30 mJ/m.sup.2 or more and 50 mJ/m.sup.2 or less at a temperature of 25° C.

A first aspect of the present invention provides a can container including: a can body of a cylindrical shape, and at least a surface coating layer, in which the surface coating layer is formed on at least a part of an outer peripheral surface of the can body, the surface coating layer has a resin component, and surface free energy of a surface of the surface coating layer is 30 mJ/m.sup.2 or more and 50 mJ/m.sup.2 or less at a temperature of 25° C.

A forming assembly for use in a can bodymaker includes a stationary assembly and a moving assembly movably coupled to the stationary assembly. The stationary assembly and the moving assembly are a unified assembly that is structured to be selectively coupled to a mounting assembly body of the can bodymaker. The moving assembly is structured to be selectively coupled to a ram drive assembly of the can bodymaker and moved with respect to the stationary assembly thereby.

A forming assembly for use in a can bodymaker includes a stationary assembly and a moving assembly movably coupled to the stationary assembly. The stationary assembly and the moving assembly are a unified assembly that is structured to be selectively coupled to a mounting assembly body of the can bodymaker. The moving assembly is structured to be selectively coupled to a ram drive assembly of the can bodymaker and moved with respect to the stationary assembly thereby.

A bi-directional and double-punch balanced high-speed bodymaker includes a punch driving mechanism and blank pressing mechanism, wherein: the punch driving mechanism includes a crankshaft, two identical connecting rods, slide rails, sliders and punches. The crankshaft is rotationally supported by a bearing, and the crankshaft has a first crank, second crank and first and second blank pressing cams. Compared with the prior art, the swing lever and secondary connection are removed from each set of punch driving mechanism, simplifying the structure while maintaining all original functions, constituting omitting elements. It adopts two blank pressing cams and arranges the first blank pressing cam driving point of the opposite the second blank pressing cam driving point, and finally, the directions of the first and second torque are opposite and counteract each other, to maintain balance of overall torque on the plane passing the crankshaft axis during the operation of the bodymaker.

A bi-directional and double-punch balanced high-speed bodymaker includes a punch driving mechanism and blank pressing mechanism, wherein: the punch driving mechanism includes a crankshaft, two identical connecting rods, slide rails, sliders and punches. The crankshaft is rotationally supported by a bearing, and the crankshaft has a first crank, second crank and first and second blank pressing cams. Compared with the prior art, the swing lever and secondary connection are removed from each set of punch driving mechanism, simplifying the structure while maintaining all original functions, constituting omitting elements. It adopts two blank pressing cams and arranges the first blank pressing cam driving point of the opposite the second blank pressing cam driving point, and finally, the directions of the first and second torque are opposite and counteract each other, to maintain balance of overall torque on the plane passing the crankshaft axis during the operation of the bodymaker.

In reforming a can bottom part, the defect of black discoloration in an associated formed portion is suppressed. A forming device for a can body, in which a cylindrical barrel part and a can bottom part are integrally formed, includes a tool used for the can body having a concave dome part in a center of the can bottom part and having an annular leg part on a periphery of the dome part to reform a shape of the leg part. The tool includes a pressing body that is inserted into the can body, and that abuts on an inner surface of the dome part, and a forming die that forms a curved end part heading inward on a lower end part of the leg part.