| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide blow molded containers for packaging "hot-fill" beverages which produces a negative pressure or vacuum in the container, and is able to withstand such changes in pressure without failure. <P>SOLUTION: The improved blow molded plastic container having generally rounded sidewalls that are adapted for hot-fill applications has two adjacent side walls 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. <P>COPYRIGHT: (C)2012,JPO&INPIT |
