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US 5,822,843 AGranted
Method of making bottle-shaped metal cans
AssigneeAluminum Company of America
InventorsHans H. Diekhoff, Andrew F. Clarke
Life of this patent
Estimating the term…
Abstract
Thin wall metal cans are described having threaded necks for receiving threaded closure to seal contents in the cans. Techniques for forming such threaded cans are also provided.
Claims14
A method for forming a light weight, resealable bottle-shaped metal can comprising:
- providing a drawn and ironed can body made of thin gauge, hard temper metal having a bottom end wall, a lower sidewall portion, an upper sidewall portion having a metal thickness greater than said lower sidewall portion, and an open top end;
- die necking said upper sidewall portion at least 20 times to form a converging wall portion and a substantially cylindrical portion adjacent said open top end to form the can body into a bottle shaped metal can;
- and
- providing a thread on said cylindrical portion for securing a threaded closure on said metal can.
1 more element
A method for forming a light weight, resealable bottle-shaped aluminum can comprising:
- providing a drawn and ironed can body made of thin gauge, hard temper aluminum alloy having a bottom end wall, a sidewall and an open top end, and said sidewall includes a lower thin wall portion having a metal thickness of about 0.0045 to 0.0065 inch and an upper thick wall portion having a metal thickness in a range of about 0.0068 to 0.0075 inch;
- die necking said upper thick wall portion at least twenty times to form a generally frustoconical portion adjacent said thin wall portion and also form a substantially cylindrical portion on top of said frustoconical portion;
- and
- securing a threaded sleeve on said substantially cylindrical portion to receive a threaded closure for closing said aluminum can.
1 more element
Dependencies are inferred from the claim text.