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US 5,487,295 AGranted
Method of forming a metal container body
AssigneeAluminum Company of America
InventorsHans H. Diekhoff, George L. Smith, Jr.
Life of this patent
Estimating the term…
Abstract
A method of forming a drawn metal cup for a container body which includes drawing a cup having a circular boss in its base wall, redrawing the cup and forming a pressure resistant profile in its base wall.
Claims7
A method of forming a metal container body which comprises;
- providing a metal cup having a sidewall and a base wall which includes a central transverse wall portion;
- a generally cylindrical annular wall portion around said central wall portion and connected to an outer peripheral wall portion which is offset with respect to said transverse wall portion;
- and
- reducing the diameter of said cylindrical annular wall of said metal cup and reforming said annular wall portion into a generally frusto conical wall portion between said central wall portion and the sidewall of the cup.
1 more element
A method of forming a metal can body, comprising:
- drawing a cup having a sidewall and an base wall;
- forming a circular boss centrally in said base wall with said boss having a transverse wall offset with respect to said base wall therearound and an annular wall connecting said transverse wall and said base wall adjacent the sidewall of the cup;
- redrawing said cup to reduce its diameter;
- and
- reforming said annular wall into a generally frustoconical wall portion extending downwardly and inwardly from the sidewall to said base wall.
2 more elements
Dependencies are inferred from the claim text.