Patent ID: 6189719
Filing Date: 2001-02-20
Classification: B65D,Y10S

Abstract:
In a plastic cover attached to a metal container wherein the container has a curl and the plastic cover has a curl engaging member that holds the cover onto the container by engaging under the curl, the improvement comprising:said curl engaging member having one or more radially inwardly extending protrusions, each of said one or more protrusions having two spaced circumferential ends and a side portion positioned between said two circumferential ends, each of said one or more protrusions also having a concave top portion which is adapted to receive said curl;wherein said circumferential ends have a first degree of engagement and said side portion of said curl engaging member having a second degree of engagement; said first degree of engagement being less than said second degree of engagement;wherein said first degree of engagement is a first radius of curvature of the concave top portion of said circumferential ends; said second degree of engagement is a second radius of curvature of the concave top portion of said side portion; and said first radius is greater than said second radius.