Vented container end closure

1. A vented metallic end closure adapted for interconnection to a neck of a container body, comprising:

a peripheral curl;

a chuck wall extending downwardly from the peripheral curl;

a central panel positioned within the chuck wall;

a deboss provided on the central panel;

a tab interconnected to the central panel and rotatable about a rivet;

a primary score defining a dispensing opening;

a vent opening comprising a secondary score;

the tab comprising a nose end and a pull end;

wherein the pull end of the tab is adapted to contact the vent opening, and wherein the tab is adapted to transmit a force to the vent opening and sever the secondary score;

the secondary score comprising first and second linear portions, the first and second linear portions being substantially parallel, and first and second opposed arcuate portions;

the vent opening comprising a raised feature and a vent hinge;

wherein the tab comprises an aperture that is larger than the raised feature of the vent opening, and smaller than the vent opening; and

wherein the vent hinge is positioned proximal to the first or second linear portion of the vent opening.

2. The vented metallic end closure of claim 1 , wherein the raised feature comprises a convex feature positioned within the secondary score which extends toward a public side of the end closure.

3. The vented metallic end closure of claim 1 , wherein the vent opening is positioned within a secondary recess and the secondary recess is provided within the deboss.

4. The vented metallic end closure of claim 1 , wherein the pull end of the tab comprises a downwardly projecting portion for contacting the vent opening.

5. The vented metallic end closure of claim 1 , wherein a center point of the vent opening is radially offset from a center line of the end closure by at least approximately 15 degrees.

6. The vented metallic end closure of claim 1 , wherein a center point of the vent opening is provided at a lateral midpoint of the end closure.

7. The vented metallic end closure of claim 1 , wherein the secondary score and the vent hinge collectively comprise a flat oval shape.

8. A vented metallic end closure adapted for interconnection to a container body, the end closure comprising:

a peripheral curl;

a chuck wall extending downwardly from the peripheral curl;

a central panel positioned inwardly from the chuck wall;

a dispensing opening and a vent opening;

the dispensing opening comprising a primary score line and the vent opening comprising a secondary score line and a vent hinge;

the secondary score comprising an oval score line at least partially surrounding a vent panel, wherein the oval score line comprises first and second linear portions and first and second opposed arcuate portions; and

an upstanding dome portion provided on the vent panel, the upstanding dome portion comprising a center that is spaced apart from the vent hinge.

9. The vented metallic end closure of claim 8 , wherein the secondary score line is provided beneath the tab at least when the container is in a first closed position.

10. The vented metallic end closure of claim 8 , wherein the upstanding dome portion comprises a convex feature positioned within the secondary score which extends outwardly from a public side of the end closure.

11. The vented metallic end closure of claim 8 , wherein a minimum distance between the upstanding dome portion and the secondary score line is at least approximately 0.010 inches and not more than approximately 0.180 inches.

12. The vented metallic end closure of claim 8 , further comprising a pull tab and wherein a pull end of the tab comprises a downwardly projecting portion for contacting the vent opening.

13. The vented metallic end closure of claim 8 , wherein a center point of the vent opening is radially offset from a center line of the end closure.

14. The vented metallic end closure of claim 8 , wherein a center point of the vent opening is provided at a lateral midpoint of the end closure.

15. The vented metallic end closure of claim 8 , wherein the secondary score line and vent hinge collectively comprise a flat oval shape.

16. A vented metallic end closure adapted for interconnection to a neck of a container body, comprising:

a peripheral curl;

a chuck wall extending downwardly from the peripheral curl;

a central panel positioned within the chuck wall;

a deboss provided on the central panel;

a tab interconnected to the deboss and rotatable about a rivet;

a primary score defining a dispensing opening and a vent opening comprising a secondary score provided within the deboss;

wherein the dispensing opening and the vent opening are provided in opposing relationship on opposite sides of the rivet;

the tab comprising a nose end and a pull end, said pull end comprising an aperture, the aperture adapted to provide visual feedback of the vent opening;

wherein the pull end of the tab is adapted to contact the vent opening, and wherein the tab is adapted to transmit a force to the vent opening and sever the secondary score;

the secondary score comprising at least one arcuate portion;

the vent opening comprising a raised feature and a vent hinge; and

wherein the vent hinge is positioned such that the vent opening hinges in an opposite direction as the dispensing opening.

17. The vented metallic end closure of claim 16 , wherein the vent opening is radially offset from a center line of the end closure.

18. The vented metallic end closure of claim 16 , wherein the secondary score line and vent hinge collectively comprise a flat oval shape.

19. The vented metallic end closure of claim 16 , further comprising an anti-fracture score at least partially surrounding the secondary score line.