초록 ▼

A metallic container having an outwardly flexible bottom wall adapted to flex to an outwardly generally convex position under pressure from within the container is provided with integral tripod-type support structure for the container in the bottom wall comprising an inwardly concave center portion

A metallic container having an outwardly flexible bottom wall adapted to flex to an outwardly generally convex position under pressure from within the container is provided with integral tripod-type support structure for the container in the bottom wall comprising an inwardly concave center portion of compound curvature having a generally equilateral triangular shaped bottom wall area extending generally radially outwardly therefrom and providing three equilaterally spaced support areas in the outwardly flexed convex position. Methods and apparatus for forming the integral tripod-type support structure comprise forming the concave center of compound curvature by a doming die with portions of the equilateral triangularly shaped bottom wall area located axially inwardly a lesser distance than other portions of the concave center in an inwardly flexed position so as to be located axially outwardly a greater distance than other portions of the bottom wall in an outwardly flexed position, thereby forming the tripod-type support structure on the bottom wall during movement from the inwardly flexed position to the outwardly flexed position under pressure of the contents of the can.

대표청구항 ▼

A generally cylindrical metal container having a product therein under pressure, said container including a generally cylindrical body having integral side and bottom walls, said bottom wall comprising a central inwardly extending area of depression, and a plurality of linearly extending surfaces lo

A generally cylindrical metal container having a product therein under pressure, said container including a generally cylindrical body having integral side and bottom walls, said bottom wall comprising a central inwardly extending area of depression, and a plurality of linearly extending surfaces located radially outwardly of and adjacent said area of depression, at least said linearly extending surfaces having been outwardly distended by pressure of said product to change the shape and configuration of the bottom wall such that said linearly extending surfaces become the outermost extent of the bottom wall and alone providing a stable base upon which the container rests in an upright position.