Hot-fill container
View Patent ↗A one-piece plastic hot-fill container may employ a shoulder portion, a base portion and a sidewall portion, which may be integrally formed with and extend from the shoulder portion to the base portion. The container may further employ a plurality of contour ribs molded into the sidewall portion—each of the plurality of contour ribs operable to change from a first shape to a second shape in response to cooling of the liquid and further extending outwardly from the container.
1. A one-piece plastic container for containing a liquid, said container including a longitudinal axis, said container comprising:
an upper portion;
a base portion closing off an end of the container;
a sidewall portion integrally formed with and extending from the upper portion to the base portion;
a plurality of vertical contour ribs molded into said sidewall portion that are vertically disposed along said sidewall portion and along the longitudinal axis of the container, each of said plurality of vertical contour ribs having a cross section taken perpendicular to the longitudinal axis, the cross section changing from a first shape to a second shape in response to cooling of the liquid, the cross section including a first leg and a second leg that extend radially outwardly from an area adjacent the respective vertical contour rib, said first leg and said second leg being joined in the cross section by an outer curved wall that is convexly curved, said first leg and said second leg pivoting relative to each other at said outer curved wall to compress the vertical contour rib in response to said cooling of the liquid; and
a plurality of lands, at least one of the plurality of lands including a first end and a second end, the first end directly connected to the first leg of one of the plurality of vertical contour ribs, the second end directly connected to the second leg of another of the plurality of vertical contour ribs, wherein said plurality of vertical contour ribs changing from a first shape to a second shape in response to cooling of the liquid comprises said at least one of the plurality of lands changing from a first arc to a second arc in response to cooling of the liquid, said second arc being smaller than said first arc.
2. The one-piece plastic container according to claim 1 , wherein the at least one of the plurality of lands is entirely convexly contoured from the first end to the second end.
3. A one-piece plastic container for containing a liquid, said container including a longitudinal axis, said container comprising:
an upper portion;
a base portion closing off an end of the container;
a sidewall portion integrally formed with and extending from the upper portion to the base portion; and
a plurality of vertical contour ribs molded into said sidewall portion that are vertically disposed along said sidewall portion and along the longitudinal axis of the container, each of said plurality of vertical contour ribs having a cross section taken perpendicular to the longitudinal axis, the cross section changing from a first shape to a second shape in response to cooling of the liquid, the cross section including a first leg and a second leg that extend radially outwardly from an area adjacent the respective vertical contour rib, said first leg and said second leg being joined in the cross section by an outer curved wall that is convexly curved, said first leg and said second leg pivoting relative to each other at said outer curved wall to compress the vertical contour rib in response to said cooling of the liquid,
wherein the first leg has a first length and the second leg has a second length, the first and second lengths being identical at an elevation along the longitudinal axis.