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US 4,512,700 AGranted
Nesting drums-method of making the same
AssigneeGreif Bros. Corporation
InventorCesar Santoni
Life of this patent
Estimating the term…
Abstract
A nesting drum and a method of making the same is provided. The drum comprises a shell which has a necking at the bottom to accommodate a double seam between the shell and the closure. The closure has a raised circular center and a plurality of ribs which re-enforce the shell to resist large loads.
Claims10
A method of making a nestable drum comprising:
- providing a cylindrical shell with one end having a first diameter;
- flaring out a portion of said one end to form an edge;
- providing a circular plate-shaped closure with a raised center, a disk, and a cylindrical side connecting said center to said disk, said side having a second diameter smaller than said first diameter and a plurality of ribs extending radially away from said center to form a circle having an outer diameter equal to said first diameter;
- associating the shell with the closure so that the edge coincides with the disk and the center and the ribs are disposed within the shell;
- and
- curling the edge and the disk together to form a seam.
3 more elements
A method of producing a nestable drum comprising:
- providing a shell with at least one open end having a first diameter;
- providing a closure with a raised center and a cylindrical side having a second diameter, said closure being formed with a plurality of ribs extending radially from said cylindrical side which generate a circle of said first diameter;
- associating said closure to said shell by axially inserting said raised center into said open end;
- reducing said open end and said ribs to form an annular space around said open end;
- and,
- forming a seam between said closure and said shell whereby said ribs reinforce said seam.
3 more elements
Dependencies are inferred from the claim text.