Patent ID: 8118187
Filing Date: 2012-02-21
Classification: B65D

Abstract:
1. A lid comprising: a central lid portion; and a peripheral clamping groove formed between an outer groove wall and an inner groove wall for being clamped onto a beaded rim of a cup-shaped receptacle, wherein a constriction is provided on at least a peripheral section of the outer groove wall, the constriction forming a projection into the interior of the groove, the projection comprising a projecting tip, an upper wall and a lower wall, the projecting tip defining a horizontal plane, wherein an angle (γ) between the horizontal plane and a tangential plane to the end of the upper wall adjacent the projecting tip is 10° to 35° smaller than the angle (θ) between the horizontal plane and a tangential plane to the end of the lower wall adjacent the projecting tip, and wherein the angle (γ) between the horizontal plane and the tangential plane to the end of the upper wall adjacent the projecting tip is 0° to 20°.