Patent
1974-07-22
1976-12-07
Hall, Carl E.
72348, 113116QA, 113120M, 113120S, 113120D, 113120W, 113120AA, B21D 5112, B21D 5124
Patent
active
039955729
ABSTRACT:
Method and apparatus for producing a novel one piece, unitary, seamless can body with a reduced diameter opening for receiving an aerosol device or other small diameter closure. A truncated conical configuration portion is formed from sidewall metal in a sequence of operations in which an extended-length reduced-diameter neck is formed with a curvilinear transition zone leading to the main body sidewall portion. A portion of this reduced diameter neck is then further reduced in diameter, and this sequence continued, until the desired size opening is achieved and flanging metal provided for an aerosol device or other small diameter closure. Selection of dimensional parameters and percentage reductions provides for: smooth transition to smaller diameters, maintaining circular configuration, ease of removal of dies permitting operations from one longitudinal end of a can body, and maintaining substantially the original can body height.
REFERENCES:
patent: 865257 (1907-09-01), Kohl
patent: 2337182 (1943-12-01), Calleson et al.
patent: 3196819 (1965-07-01), Lechner et al.
patent: 3812696 (1974-05-01), Knensel et al.
patent: 3820486 (1974-06-01), Hilgenbrink
Hall Carl E.
National Steel Corporation
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