초록

An end closure for a container is provided. The end closure includes a stay-on-tab and a tear panel defined by a frangible score and a non-frangible hinge segment. The tear panel includes a raised portion which extends in an upward orientation toward a public side of the end closure.

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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; anda central panel interconnected to the countersink, the central pan

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; anda 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. 2. The metallic end closure of claim 1, wherein the sidewall comprises a first lateral endpoint and a second lateral endpoint, the sidewall extending upward from a deboss portion of the tear panel to the transition, and wherein the ramp extends downwardly from the transition. 3. The metallic end closure of claim 1, wherein the transition extends above a substantially horizontal plane within which the tear panel resides between approximately 0.001 inches and approximately 0.020 inches. 4. The metallic end closure of claim 1, wherein the transition extends above a substantially horizontal plane within which the tear panel resides between approximately 0.011 inches and approximately 0.015 inches. 5. The metallic end closure of claim 1, wherein the transition comprises a curvilinear shape when viewed in plan view. 6. The metallic end closure of claim 1, wherein the tab comprises a nose portion, the nose portion being offset from an outer periphery of the transition and adapted to apply a force to the tear panel at between approximately 0.010 inches and approximately 0.015 inches from the outer periphery. 7. The metallic end closure of claim 1, wherein the tab comprises an arcuate nose portion and at least a portion of the transition comprises an arcuate shape that is substantially parallel to a portion of the arcuate nose portion. 8. The metallic end closure of claim 7, wherein the arcuate nose portion and the transition portion comprise concentric arcuate portions. 9. The end closure of claim 1, wherein an uppermost point of the raised portion of the tear panel extends above a non-raised portion of the tear panel from about 0.011 inches to about 0.015 inches. 10. The end closure of claim 1, wherein the non-raised portion of the tear panel is disposed within a substantially horizontal plane, and wherein the first endpoint and the second endpoint of the sidewall reside within the substantially horizontal plane. 11. 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; anda central panel interconnected to the countersink and including a tear panel defined by a frangible score and a non-frangible hinge segment, wherein the tear panel includes a non-raised portion and a raised portion, wherein the raised portion includes a sidewall, a ramp, and a curvilinear transition between the sidewall and the ramp, wherein the sidewall has a first endpoint and a second endpoint, the first endpoint and the second endpoint being spaced apart by a predetermined distance, and the sidewall extends upward from the non-raised portion of the tear panel to the transition, the sidewall forming a sidewall angle with the non-raised portion of the tear panel, wherein the ramp extends upward from a substantially horizontal plane comprising the central panel, the ramp forming a ramp angle with the substantially horizontal plane, wherein the ramp angle is between approximately 2 and 4 degrees, and wherein the sidewall angle is a different angle than the ramp angle. 12. The end closure of claim 11, wherein the sidewall has a linear profile, wherein the ramp has a linear profile, and wherein the linear profile of the sidewall has a greater slope than the linear profile of the ramp. 13. The end closure of claim 11, wherein the transition comprises an inflection point between the ramp and the sidewall. 14. The end closure of claim 13, wherein the sidewall has a convex profile, and wherein the ramp has a concave profile. 15. The end closure of claim 11, further comprising a pull tab interconnected to the central panel and having an arcuate nose. 16. The end closure of claim 15, wherein the sidewall further comprises a first arcuate segment positioned substantially parallel to a portion of the frangible score, a third arcuate segment positioned substantially parallel to the arcuate nose of the tab, a fifth arcuate segment positioned substantially parallel to a portion of the frangible score and generally opposing the first arcuate segment, a second arcuate segment interconnecting the first arcuate segment and the third arcuate segment, and a fourth arcuate segment interconnecting the third arcuate segment and the fifth arcuate segment. 17. A method of forming a container end closure, the method comprising: providing a base material;forming a peripheral curl in base material;providing a chuck wall interconnected to a lower end of the peripheral curl;providing a countersink interconnected to a lower end of the chuck wall and a central panel interconnected to the countersink;forming a score line in the base material, wherein the forming of the score line displaces at least some of the base material away from the score line and forms a tear panel;securing the base material between a first tooling member and a second tooling member, at least one of the first and second tooling members comprising a relief portion disposed on a public side of the base material for allowing an upward deformation of a portion of the base material;contacting the content side of the base material with a deforming tool, the deforming tool comprising an inclined portion, wherein at least a portion of the inclined portion is in axial alignment with at least a portion of the relief portion;forming an upward oriented feature within the score line, wherein forming the upward oriented feature stiffens a tear panel formed by the score line and re-draws the displaced base material created during formation of the score line;the upward oriented feature comprising a sidewall, a ramp extending upwardly toward a public side of the end closure from the score line, and a transition between the sidewall and the ramp;the ramp having a first slope extending toward a public side of the end closure from a point proximal to the score line 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 horizontal plane, wherein the second slope comprises a different angle than the first slope; andwherein the sidewall extends along an arcuate path between a first endpoint and a second endpoint, the first endpoint and the second endpoint being spaced apart by a predetermined distance. 18. The method of claim 17, further comprising forming a downward oriented step connecting the upward oriented feature to the base material. 19. The method of claim 17, further comprising forming a deboss area within the base material. 20. The method of claim 17, further comprising forming a peripheral curl at an outer circumference of the base material, the peripheral curl adapted for interconnection to a container body.