| 主权项 |
1. A metallic end closure with controlled buckling characteristics, comprising:
a peripheral curl which is adapted for interconnection to a neck of a beverage container; a chuck wall extending downwardly from said peripheral curl; a countersink interconnected to a lower end of said chuck wall; an inner panel wall extending upwardly from an interior portion of said countersink; a central panel interconnected to an upper portion of said inner panel wall, said central panel having a substantially planar surface oriented in a substantially horizontal plane; a pull tab having a nose end and a tail end, said pull tab operably interconnected to said central panel; a first score line in said central panel, which defines a substantially hinged tear panel and pour opening; at least one induced buckle coin positioned on said central panel and proximate to an outer peripheral edge of said central panel, said induced buckle coin extending around said central panel no greater than about 90 degrees as measured from a center point of said end closure; a panel radius defined by said upper portion of said inner panel wall and said outer peripheral edge of said central panel, said panel radius having a first radius of curvature, and wherein said panel radius comprises a continuous panel coin which extends continuously around said panel radius; and a non-continuous panel coin positioned proximate to said panel radius and interrupted proximate to said at least one induced buckle coin, wherein a furthermost point of said at least one induced buckle coin from said center point does not extend beyond an innermost edge of said non-continuous panel coin, and wherein any buckling of said metallic end closure is initiated proximate to said at least one induced buckle coin when a pressure within said beverage container is elevated above a predetermined level. |
