| 摘要 |
Petaloid base for a self-standing container 10 e.g. keg or bottle has a spheroidal, preferably hemispherical underlying base contour 14 and spheroidal, preferably ovoid foot projections 16 interrupting the base contour. Projections 16 may radiate from a central, polygonal, convex protrusion 18 in the base having longitudinal axes 20 extending outward and upwards in a conical formation from the central axis of the base. The intersection of the foot projection with the base 26 may be of concave cross section. Valleys 22 formed between the feet may extend from apices 24 of the polygonal protrusion and widen towards the outside of the base. The outermost edge of the foot formations may lie inwardly of the outer walls of the container, determined by a given ratio. The shape resists stress cracking, maximises capacity relative to the height of the container and reduces the surface area of the base and hence material usage.
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