Rib for plastic container
AssigneePepsiCo, Inc.
InventorsChristopher J. Mero, Richard F. Bellas
Life of this patent
Estimating the term…
Abstract
The present invention relates to a blow molded plastic container whose thin wall shoulder portion has a plurality of rib-like protrusions. Each of said rib-like protrusions are configured with multiple radii of curvature having a specifically defined relationship. The protrusions so formed do not adversely affect the integrity of the shoulder portion wall structure and do not distort upon internal pressurization of the container.
Claims20
A blow molded plastic container which comprises a neck portion adapted to receive a closure;
- a shoulder portion;
- a body portion;
- and a bottom portion, said shoulder portion having along at least a part of the length thereof a plurality of upwardly directed rib-like protrusions, each protrusion in horizontal cross-section having a first transition portion, a central portion and a second transition portion connected in series, said first transition portion being concave outwardly and having a substantially uniform radius of curvature R.sub.1, said central portion being concave inwardly and having a substantially uniform radius of curvature R.sub.2, and said second transition portion being concave outwardly and having a substantially uniform radius of curvature R.sub.3 wherein R.sub.1 and R.sub.3 are substantially the same and are about 7 to 9 times greater than R.sub.2.
A stretch blow molded, PET container which comprises a neck portion adapted to receive a closure;
- a semirigid biaxially oriented shoulder portion having a wall thickness of about 0.22 mm to about 0.35 mm;
- a biaxially oriented tubular body portion;
- and a bottom portion, said shoulder portion having along substantially the entire length thereof, a plurality of upwardly directed rib-like protrusions oriented in the form of a spiral, said rib-like protrusions being disposed substantially equidistant from one another about the circumference of said shoulder portion, each of said rib-like protrusions in axial cross-section having a first transition portion, a central portion and a second transition portion connected in series, said first transition portion being concave outwardly and having a substantially uniform radius of curvature R.sub.1, said central portion being concave inwardly and having a substantially uniform radius of curvature R.sub.2, and said second transition portion being concave outwardly and having a substantially uniform radius of curvature R.sub.3, wherein R.sub.1 and R.sub.3 are substantially the same and are about 6.30 mm to about 6.40 mm, and R.sub.2 is about 0.74 mm to about 0.84 mm.
Dependencies are inferred from the claim text.