Sheet metal container
AssigneeAluminum Company of America
InventorsHoward W. Kronenwetter, Freddy R. Schultz
Life of this patent
Estimating the term…
Abstract
An improved sheet metal container and method of forming the same are provided in which the container comprises a body member and an end member wherein the body member is provided with a body flange extending generally radially outwardly at the end thereof, and the end member is provided with a wall which fits within the body member and an end flange extending generally radially outwardly at the end thereof rolled into a seam with the body flange. The body flange is curled at its terminal end against a coating provided on the metal surface of the body member and the end flange is curled at its terminal end against a coating provided on the metal surface of the end member to isolate the metals having different electrode potentials in order to resist galvanic corrosion.
Claims3
A sheet metal container comprising:
- a body member with interior and exterior surfaces protectively coated and the edge surfaces uncoated, having a body flange extending generally radially outwardly of the longitudinal axis of the container at the end thereof, the terminal end of said body flange being curled such that the entire uncoated edge surface is disposed inside the curl, and at least a portion of the interior surface of the curled body flange is butting against the exterior metal surface of the body member, and
- an end member having a different electrode potential than said body member with interior and exterior surfaces protectively coated and the edge surfaces uncoated, having a wall fitting within the body member and an end flange extending generally radially outwardly of the longitudinal axis of the container at the end thereof, the terminal end of said end flange being curled such that the entire uncoated edge surface is disposed inside the curl, and at least a portion of the exterior surface of the curled end flange is butting against the interior metal surface of the end member, said curled end flange subsequently rolled into a double seam with the curled body flange.
A method of fabricating a corrosion resistant sheet metal container comprising:
- curling a terminal end portion of a radially outwardly extending attachment flange on the top of a protectively coated cylindrical body member outwardly and downwardly such that an uncoated terminal edge surface thereof is entirely disposed inside the curl and at least a portion of the interior surface of the curled body flange is butting against the exterior surface of the body flange,
- curling the end portion of a peripheral flange of a protectively coated end member adapted to close the top end of said body member such that an uncoated terminal edge surface of said flange is entirely disposed inside the curl and at least a portion of the exterior surface of the curled end flange is butting against the interior surface of the end flange, and
- after forming the curls on the body member and the end member, seaming said end member on said body member by positioning the end member as the top end of said body member with the peripheral flange on the end member overlying the attachment flange on the body member and wrapping said flanges downwardly and inwardly together.
Dependencies are inferred from the claim text.