Patent ID: 9555922
Date: 2017-01-31
CPC Classifications: B65D

Claim:
1. Lid for a container able to contain a liquid or powdery substance comprising: a central surface having a substantially circular shape, concentric with respect to a central axis (Y) of the container, and on which a line of weakening is made, which defines a closing element that is configured to be opened by pulling on the closing element; and a drive tab, having at least a first end able to act as a fulcrum outside said line of weakening and an intermediate flexible portion zone solid with said tab and connected with a rivet to said closing element and able to be driven so as to remove upward said closing element, detaching the closing element along said line of weakening, said line of weakening being interrupted at one end of said closing element opposite to said drive tab, with respect to said central axis (Y), so that said closing element has a connection flap solid with the remaining part of said central surface, wherein the fulcrum of the drive tab is a central part of the first end of the drive tab that cooperates with the edge of the central surface in close proximity to a peripheral curb and wherein the connection flap connects to the central surface by elasticizing connections and the elasticizing connections branch off in opposite directions with respect to a median axis of the connection flap, and an axis of the rivet, in the case of aluminum and its alloys, being located at 1.5-3.5 mm or at 2.0-2.5 mm, whereas in the case of ferrous alloys the axis of the rivet is located at 4.0 and 6.0 mm or between 4.5 and 5.0 mm, from the fulcrum at a front terminal part of the closing element, wherein the fulcrum of the drive tab, the axis of the rivet and the front terminal part of the closing element are conformed as a concentrator segment where a break starts when a force is applied to the drive tab, and the drive tab is configured to apply the force at the axis of the rivet, wherein the central surface comprises at least one area with a reduced thickness along the line of weakening and in the intermediate flexible portion zone, wherein the concentrator segment is on the line of weakening and is in correspondence with the intermediate flexible portion zone where the pulling begins, to reduce the effort needed to pull the closing element; and wherein the connection flap includes an at least partially longitudinal reinforcement deformation, which substantially extends around the closing element, and is defined peripherally by a reinforcement edge, and wherein the reinforcement edge and the line of weakening have substantially different shapes.