Patent ID: 7954354

Claim:
A method for manufacturing a container comprises the steps of: providing a metal container having (i) a closed bottom, (ii) a sidewall with an interior diameter and a height, and (iii) a lower body between the closed bottom and the sidewall, the lower body having a profile; providing a die system comprising a container base holder having (i) an opening with a diameter to receive the closed bottom of the container; and (ii) an interior having a lower body profile, and one or more rigid metal expansion dies, wherein at least one rigid metal expansion die of the one or more rigid metal expansion dies comprise a tip having a lower body profile that cooperates with the lower body profile of the container base holder, wherein the lower body profiles of the container base holder and the tip are different than the profile of the lower body of the metal container; positioning the closed bottom of the container into the opening diameter of the container base holder; and moving the one or more rigid metal expansion dies to travel axially within the container to (i) radially expand the interior diameter of the sidewall to a larger interior diameter by the axial travel of the one or more rigid expansion dies, (ii) shorten the height of the sidewall and (iii) reform the profile of the lower body of the container wherein the larger interior diameter is uniform along the height of the sidewall.