Patent ID: 9533789
Date: 2017-01-03
CPC Classifications: B65D

Claim:
1. An open-top injection molded plastic container comprising: a continuous circular sidewall having inside and outside surfaces; a bottom integral with said sidewall; wherein the sidewall has formed on the inside surface thereof a plurality of circumferentially spaced concave vertical flutes having vertical edges of a first maximum wall thickness; said concave flutes having centers of a second minimum wall thickness substantially less than said maximum thickness wherein between the flutes are vertical, essentially flat-surfaced columns of a constant thickness equal to said maximum wall thickness and wherein the columns and flutes extend vertically for more than 50% of the height of the sidewall; the outside surface is smooth and unfluted; and wherein the center depth of the concavity is about 0.022 inches and the thickness of the sidewall is about 0.070 inches at the center of a concavity and about 0.092 inches at the center of a flat-surfaced column.