Receptacles – End wall structure – Joint or seam between sidewall and end wall
Patent
1993-04-08
1995-06-06
Moy, Joseph Man-Fu
Receptacles
End wall structure
Joint or seam between sidewall and end wall
B65D 804
Patent
active
054214807
ABSTRACT:
A thin-walled metal container is formed with a bottom wall having a substantially flat central panel connected to a curved wall portion through an annular, inclined flat or frustum wall portion. The curved wall portion joins the container side wall and is defined by the base radius. The inclined or frustum connecting wall portion acts as a hinge which enables the central panel to move between an upper, non-tensioned position and a lower, tensioned position. In the upper position, the annular downward facing surface of the curved wall located at the radially outermost periphery of the bottom wall defines a support surface which supports the container against necking, seaming, and filling column loads. After displacement of the central panel to the lower, tensioned position, which may occur after filling as a result of carbonation pressure, the container rests on a series of circumferentially spaced feet. These feet are also radially spaced to permit stacking engagement with the upper seamed end of another container. Since the bottom wall does not rely on inwardly curved mechanical features to resist internal pressurization, a thinner gauge metal can be used to satisfy design parameters and can achieve cost and metal reduction savings.
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Lyne, Jr. Robert C.
Man-Fu Moy Joseph
Reynolds Metals Company
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