Improved greased bottom for metal containers, mainly for food preserves, of the type comprising a body, a bottom element and a lid element, at least one of said elements being applied to said body by means of crimping and having an annular part, called bucket in contact with the internal face of the wall of said body and in the vicinity of said bucket an annular half-ring of flexibility characterized in that the bucket enters and said half-shank of flexibility there is an annular zone of stiffness that presents a moment of inertia increased to oppose a permanent deformation under the effect of an internal pressure whatever its origin. (Machine-translation by Google Translate, not legally binding)
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