Pressure container with differential vacuum panels

An improved blow molded plastic container having generally rounded sidewalls that are adapted for hot-fill applications has two adjacent sides and two pairs of controlled deflection panels, each pair reacting to vacuum pressure at differing rates of movement, whereby one pair inverts under vacuum pr...

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Bibliographic Details
Main Authors MELROSE, DAVID MURRAY, KELLEY, PAUL, BYSICK, SCOTT, HOWELL, JUSTIN A
Format Patent
LanguageEnglish
Published 31.08.2007
Edition7
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Summary:An improved blow molded plastic container having generally rounded sidewalls that are adapted for hot-fill applications has two adjacent sides and two pairs of controlled deflection panels, each pair reacting to vacuum pressure at differing rates of movement, whereby one pair inverts under vacuum pressure and the other pair remains available for increased "squeezability" or extreme vacuum extraction. The opposing sidewalls are symmetric relative to vacuum panel and rib shape and placement. The ribs and controlled deflection panels cooperate to retain container shape upon filling and cooling and also improves bumper denting resistance, decreases vacuum pressure within the container, and increases light weight capability.
Bibliography:Application Number: NZ20040535722