Packing container

Claim 1

A packing container for liquids comprising a container composed of plastic material and provided with a convex upper portion forming a dome and an inwardly turned flange element surrounding a pouring opening in the top of the convex upper portion, and a cap member releasably secured in the pouring opening for closing said container, said cap member having an outwardly and radially extending offset portion for sealingly engaging the rim of the pouring opening at the top of the convex upper portion when said cap member is secured in the pouring opening, the improvement wherein said inwardly turned flange element is provided with a plurality of spaced passages arranged circumferentially around and extending through the upper portion of the inwardly turned flange element from the upper portion of the pouring opening radially inwardly of the rim thereof and downwardly and radially outwardly into the top portion of the container adjacent the top of the dome formed by the convex upper portion whereby when the cap member is removed and the container is tilted for pouring the liquid contents therefrom, the uppermost passages permit the entrance of air into the container to permit even flow of the liquid from the container and the lowermost passages permit flow of liquid from the container into the liquid passing through the pouring opening and so that residual liquid which would normally be trapped in the convex upper portion when the container is almost empty will drain outwardly therethrough.