Bottles and jars – Ejecting – Siphon type
Patent
1990-03-12
1991-02-19
Weaver, Sue A.
Bottles and jars
Ejecting
Siphon type
220606, 220608, B65D 102, B65D 142, B65D 2300
Patent
active
049935674
ABSTRACT:
An improved base configuration for a blow molded plastic container used in hot-fill applications. The base consists of a peripheral support ring that is generally concentric with the container side walls and connected to a central dome portion. The dome extends upwardly into the body cavity of the container and terminates in a central disk region that is also concentric with the container side walls. A number of raised involute embossments radiate about the central disk in a substantially spiral fashion downward along the dome. The embossments are limited to that area of the dome where unrelaxed retractive stresses may be formed during blow molding of the container. The embossments increase the amount of material in the base which becomes sufficiently oriented so as to resist the deformation induced by the unrelaxed retractive stresses during hot filling of the container.
REFERENCES:
patent: 4134510 (1979-01-01), Chang
patent: 4174782 (1979-11-01), Obsomer
patent: 4249666 (1981-02-01), Hubert et al.
patent: 4598831 (1986-07-01), Nakamura et al.
patent: 4818575 (1989-04-01), Hirata et al.
patent: 4863046 (1989-09-01), Collette et al.
patent: 4877141 (1989-10-01), Hayashi et al.
Hoover Universal Inc.
Weaver Sue A.
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