Container with combination convex/concave bottom

Abstract

An aluminum one-piece container body, defining a sidewall and bottom, has a substantially hemispherical or otherwise convex, preferably curvilinear, surface surrounding a central concave panel. A plurality of feet extend downwardly from the convex region. The convex region provides strength advantages associated with containing pressurized material. A concave panel accommodates changes in differential pressures such as arising from pasteurization or other heating. The feet are preferably configured to provide substantial stackability and conveyability as well as support stability for the container.

Dependencies are inferred from the claim text.