Preform for a hot fill pressure container
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United States of America Patent
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Mar 23, 1999
Issued Date -
N/A
app pub date -
Apr 12, 1993
filing date -
Mar 15, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This relates to the packaging of a hot liquid product in a container having little resistance to internal vacuum wherein immediately after the container has been filled, the container is internally pressurized and closed. This particularly relates to an injection molded preform formed of a suitable polyester resin which is of a configuration related to an intended blow mold cavity whereby the desired biaxial orientation is obtained in the various portions of the resultant container and the wall thickness of the container base is increased so as to prevent undue stress enlargement and creep at high internal pressurization. Internal pressurization on the order of 40-45 psig is envisioned.
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