Method of making an extravertable-wall container

Details Method of making an extravertable-wall container Method of making an extravertable-wall container

1975-02-11

1977-07-12

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

264 97, 264295, 264296, 425536, 425564, B29C 1707

Patent

active

040354610

ABSTRACT:
An extravertable-wall container is formed by extruding a parison into a blow-mold cavity having a pair of oppositely diverging halves which are joined at their widest portions, one half being slightly smaller than the other so that the frusto-conical wall of the container formed in this half can be pushed (compressed) into the other half to produce a stackable cup-shaped structure. When the container is to be filled, the inner wall portion is extraverted to form an extension of the container, e.g. the bottom. The container may have a frustoconical upwardly widening base which is geometrically smaller but inverted with respect to the larger frustoconical head. A neck or filling opening may be provided on this head.

REFERENCES:
patent: 2208744 (1940-07-01), Bergerioux
patent: 3252625 (1966-05-01), Cattaneo
patent: 3819789 (1974-06-01), Parker

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