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Container bottom structure

  • US 3,935,955 A
  • Filed: 02/13/1975
  • Issued: 02/03/1976
  • Est. Priority Date: 02/13/1975
  • Status: Expired due to Term
First Claim
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1. In a container having a side wall, at least an end portion of the side wall being generally symmetrical about a central axis of the container, and a bottom structure closing the container at the side wall end portion, the outer surface of the bottom structure comprising a central concave dome portion, a convex annular rim portion circumscribing the dome portion and merging therewith and with the side wall end portion, and a plurality of radially oriented foot portions extending axially outwardly of the rim portion, each foot portion having lateral margins merging with the rim portion to form a rib portion between each pair of adjacent foot portions, the radial profile of each foot portion comprising a curve tangent to the radial profile of the dome portion and to the profile of the side wall end portion, the improvement comprising the feature that the foot portion curve comprises a plurality of tangential arcs in series, the radii of curvature of adjacent ones of the lastmentioned arcs being unequal.

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