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US 10,875,076 B2Granted
Tapered metal cup and method of forming the same
AssigneeBall Corporation
InventorAnthony J. Scott
Life of this patent
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Abstract
A metal cup and method of forming the same is provided. Metal cups of the present disclosure comprise a plurality of thin, straight-walled sections and a tapered profile. A domed portion is provided in the bottom of the cup. The cup may comprise a disposable cup, a reusable cup, or a recyclable cup.
Claims6
A method of forming a thin-walled tapered metallic cup, the method comprising:
- providing a stock material;
- cutting a blank from the stock material;
- forming the cup from the blank by performing a draw operation;
- performing a redrawing operation on the cup to provide the cup with a predetermined height and a wall thickness;
- subsequent to the redrawing operation, trimming the cup;
- curling the top edge of the cup to form a lip;
- performing a plurality of further drawing steps to form a plurality of straight walled sections and wherein each of the straight walled sections comprise successively smaller diameters;
- subsequent to the plurality of drawing steps, expanding each of the straight walled sections to a larger diameter with a die comprising a tapered profile;
- and
- wherein the step of expanding each of the straight walled sections comprises increasing the height of the cup to a final height.
7 more elements
Dependencies are inferred from the claim text.