Receptacles – End wall structure – One-piece side and end wall
Patent
1996-11-20
1998-03-17
Pollard, Steven M.
Receptacles
End wall structure
One-piece side and end wall
220906, B65D 742
Patent
active
057277109
ABSTRACT:
Gas-tight container featuring an outer shell of metal or metal and plastic or metal and cellulose-containing material, a base, a lid and at least one side-wall. The container may be e.g. a can with, as viewed in plan view, a polygonal, round or oval cross-section. The base or part of the base of the gas-tight container exhibits a region which may be made to bulge and which is surrounded by an endless depression and, in the condition in which the can may be used, is in the form of a concave bulge. A container of this kind is such that one can readily recognize if the contents have suffered from spoiling or decomposition and, as a consequence, gas has been formed inside the container. If the pressure inside the container increases, the bulge is pushed outwards and, usefully, may form a convex bulge. If the bulge is pushed out by the increase in internal pressure, it projects beyond the outer limits of the container base rim, as a result of which the linear or ring-shaped contact the base rim makes with an underlying surface changes to two point contact and the container indicates a chemical or physical change by its instability on an underlying surface.
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Severus Harald
Walter Juris
Ziegler Andreas
Alusuisse Technology & Management Ltd.
Pollard Steven M.
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