| 主权项 |
1. A metallic end closure adapted for interconnection with a container, comprising:
a peripheral curl; a chuck wall interconnected to a lower end of the peripheral curl; a countersink interconnected to a lower end of the chuck wall; and a central panel interconnected to the countersink, the central panel comprising a tear panel defined by a frangible score, a non-frangible hinge segment, and a tab for opening the tear panel; the tear panel comprising a sidewall, a ramp extending upwardly toward a public side of the end closure from the frangible score, and a transition between the sidewall and the ramp; the ramp comprising a first slope extending toward a public side of the end closure from a point proximal to the frangible score and generally toward the transition, the first slope comprising an angle with respect to a horizontal plane of between approximately 1 and 5 degrees; the sidewall comprising a second slope extending from a point proximal the transition toward the non-frangible hinge segment and wherein the transition comprises a point of inflection between the first slope and the second slope, the sidewall further comprising a sidewall angle between the second slope and the substantially horizontal plane, wherein the second slope comprises a different angle than the first slope. |
