Abstract: An end wall for a can body has a central panel (7) surrounded by a conventional expansion ring (8) which is connected to an inner wall (16) of a channel portion by an upwardly extending deformable annulus (17, 18) so that during thermal processing of a closed can having this end wall, the deformable annulus changes shape to permanently increase the container volume. The deformable annulus protects the side wall and ends of the can from excessive pressure so thinner container materials may be used.

Abstract: A metal can body for a beverage can comprises a bottom end wall 2 and a generally cylindrical side wall 3; the side wall comprising a bottom portion 4 connected to the bottom wall, a central portion 5 extending upwardly from the bottom portion, and a top portion 6 extending upwardly from the central portion and terminating in an open end. The top portion 6 and bottom portion 4 are of greater wall thickness than the central portion 5 and are respectively connected to the central portion through upper and lower annular zones 7, 8 of reducing wall thickness. The side wall is provided with a plurality of parallel externally convex longitudinal ribs 10 equally spaced around the circumference and terminating within the zones 7, 8 of reducing wall thickness.

Abstract: A metal can body comprises an end wall and a tubular side wall. The side wall has upper and lower cylindrical portions joined by a plurality of concave flexible panel portions and ribs. The benefit arising from the flexible panels in the side wall is the ability to attenuate the internal pressure changes arising during thermal processing of lidded cans by providing a elastic mechanism which enhances the change in internal can volume.

Abstract: In a method of reshaping a container (1) having side wall (2) and a bottom wall (3), the container is rotated by support means (11, 12) while a roll (13) is applied thereto and moved towards the container axis. The bottom wall (3) comprises a central panel (4), an annular wall (5) depending from the periphery of the central panel, an outwardly convex bead (6) of arcuate cross-section on which the container stands and a transition wall (7) extending radially and axially from the convex bead to the side wall (2), and the roll is applied to the transition wall (7) to reshape it and to tighten the curvature of the convex bead. The method permits the formation of bottom wall profiles which resist eversion under the influence of pressure within the container so that thinner metals, such as tinplate or aluminum alloys, may be used.