Bottles and jars – Ejecting – Siphon type
Patent
1990-02-07
1991-04-09
Weaver, Sue A.
Bottles and jars
Ejecting
Siphon type
220606, B65D 102, B65D 142, B65D 2300
Patent
active
050057162
ABSTRACT:
A polyester container particularly adapted for hot fill applications having an improved base configuration. The container base has an outer circular ring defining a support plane for the container with a central outwardly concave dome portion therein. The dome portion includes a number of reinforcing rings formed along concentric tangent lines. In accordance with several embodiments, the circular rings are uninterrupted, whereas in other embodiments, the rings are interrupted at regular angular intervals with relatively smooth zones or hemispherical pockets therebetween. The containers provide excellent mechanical stability in response to positive and negative pressure within the container, and also in response to unrelaxed retractive stresses within the container material which tend to cause deformation of the container, particularly when exposed to elevated temperatures during demolding of the container and during the hot fill cycle.
REFERENCES:
patent: 4134510 (1979-01-01), Chang
patent: 4174782 (1979-11-01), Obsomer
patent: 4249666 (1981-02-01), Hubert
patent: 4276987 (1981-07-01), Michel
patent: 4426013 (1984-01-01), Cherchian
patent: 4427705 (1984-01-01), Wyslotsky
patent: 4542029 (1985-09-01), Caner
patent: 4598831 (1986-07-01), Nakamura
patent: 4818575 (1989-04-01), Hirata et al.
patent: 4863046 (1989-05-01), Collette et al.
Hoover Universal Inc.
Weaver Sue A.
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