Can shell and double-seamed can end
View Patent ↗A drawn aluminum can shell has a peripheral crown which is double-seamed with an end portion of an aluminum can body to provide a can end having a generally flat center panel connected by an inclined curved or straight panel wall to an inclined inner wall of an annular U-shaped countersink. The countersink has an outer wall which connects with an inclined lower wall portion of a chuck wall at a junction below the center panel, and the chuck wall has a curved or inclined upper wall portion which connects with an inner wall of the crown. The chuck wall also has an intermediate wall portion forming a break, and the inner bottom width of the countersink is less than the radial width of the panel wall. The inclined upper wall portion of the chuck wall extends at an angle greater than the angle of the inclined lower wall portion of the chuck wall.
1. A one piece metallic end closure adapted for double seaming to a neck of a container, comprising:
a substantially circular center panel with a vertical center axis;
a peripheral curl having a first end and a second end, said first end adapted for interconnection to the neck of the container;
a countersink having an outer panel wall and an upwardly and inwardly oriented inner panel wall, said outer panel wall oriented at a first angle between about 3 degrees and about 19 degrees with respect to said vertical center axis, wherein said countersink is further defined by a first radius of curvature below said inner panel wall and a second radius of curvature below said outer panel wall;
a beveled panel wall interconnected on an upper end to said substantially circular center panel at a third radius of curvature and integrally interconnected on a lower end to an upper end of said upwardly and inwardly oriented countersink inner panel wall, said beveled panel wall oriented at a second angle between about 30 and 60 degrees with respect to said vertical center axis and having a substantially uniform thickness; and
a chuck wall comprising an upper wall portion interconnected to said second end of said peripheral curl and a lower wall portion extending inwardly and downwardly and interconnected to said countersink outer panel wall, wherein said upper chuck wall portion is interconnected to said lower chuck wall portion at a break forming wall portion which defines a delineation in a radius of curvature, and wherein said substantially circular center panel is elevated above said break forming wall portion of said chuck wall.
2. The end closure of claim 1 , wherein said chuck wall upper wall portion is oriented at a third angle with respect to said vertical center axis and said chuck wall lower wall portion is oriented at a fourth angle with respect to said vertical center axis, and wherein said fourth angle is less than said third angle.
3. The end closure of claim 1 , wherein said first radius of curvature is between about 0.009 inches and about 0.029 inches and said second radius of curvature is between about 0.009 inches and about 0.016 inches.
4. The end closure of claim 1 , wherein said substantially circular center panel is substantially horizontal.
5. The end closure of claim 1 , wherein a portion of said beveled panel wall between said upper end and said lower end is substantially linear when viewed in cross-section.
6. A one piece metallic end closure adapted for double seaming to a neck of a container, comprising:
a substantially circular center panel with a vertical center axis;
a peripheral curl having a first end and a second end, said first end adapted for interconnection to the neck of the container;
a chuck wall comprising an upper wall portion and a lower wall portion, said upper wall portion oriented at a first angle with respect to said vertical center axis and interconnected to said second end of said peripheral curl through a junction having a chuck wall transition radius of curvature, said lower wall portion extending inwardly at a second angle with respect to said vertical center axis, and wherein said second angle is less than said first angle;
a generally U-shaped countersink having an outer panel wall interconnected to said chuck wall lower wall portion, a countersink radius of curvature between about 0.009 inches and about 0.029 inches, and an upwardly oriented inner panel wall having a first curve with a first radius of curvature; and
an inclined panel wall having an upper end and a lower end, said upper end of said inclined panel wall interconnected to said substantially circular center panel at a second curve with a second radius of curvature between about 0.014 inches and about 0.050 inches, said lower end of said inclined panel wall interconnected to said upper end of said countersink inner panel wall at a third curve with a third radius of curvature between about 0.021 inches and about 0.190 inches, and said inclined panel wall having a substantially uniform thickness between said second curve and said third curve when viewed in cross-section.
7. The end closure of claim 6 , wherein said chuck wall transition radius of curvature is about 0.018 inches.
8. The end closure of claim 6 , wherein a portion of said inclined panel wall between said upper end and said lower end is substantially linear when viewed in cross-section.
9. The end closure of claim 6 , wherein said substantially circular center panel is substantially horizontal.
10. The end closure of claim 6 , wherein said chuck wall lower wall portion is interconnected to said chuck wall upper wall portion by a break forming wall portion which is between about 0.068 inches and about 0.091 inches above a lowermost portion of said countersink.
11. A one-piece metallic end closure adapted for double seaming to a container, comprising:
a substantially circular center panel with a vertical center axis;
a peripheral curl having a curved outer wall, a top portion, and an inclined wall portion extending downwardly at a first angle less than about 16° relative to said vertical center axis;
a chuck wall comprising an inclined lower wall portion and an arcuate shaped upper wall portion interconnected to a lower end of said inclined wall portion of said peripheral curl at a junction formed by an outwardly oriented first curve having a first radius of curvature;
a countersink comprising an inner wall portion having an upper end with a substantially vertically oriented portion, an outer wall portion interconnected to said chuck wall inclined lower wall portion, and a generally U-shaped cross-sectional configuration; and
a faceted inclined annular panel wall having an upper end interconnected to said substantially circular center panel, a lower end integrally interconnected to said upper end of said countersink inner wall portion, and a substantially uniform thickness when viewed in cross-section, wherein said faceted inclined annular panel wall is positioned at a second angle between about 30° and about 60° relative to said vertical center axis.
12. The end closure of claim 11 , wherein said upper end of said faceted inclined annular panel wall is interconnected to said substantially circular center panel at a second curve having a second radius of curvature between about 0.014 inches and about 0.050 inches and a substantially uniform thickness.
13. The end closure of claim 11 , wherein said upper end of said countersink inner wall portion is integrally interconnected to said lower end of said faceted inclined annular panel wall at a third curve having a third radius of curvature between about 0.021 inches and about 0.190 inches and a substantially uniform thickness.
14. The end closure of claim 11 , wherein at least a portion of said faceted inclined annular panel wall between said upper end and said lower end is substantially linear when viewed in cross-section.
15. The end closure of claim 11 , wherein said substantially circular center panel is substantially horizontal.
16. The end closure of claim 11 , wherein a portion of said faceted inclined annular panel wall between said upper end and said lower end has a substantially straight upper surface and a substantially straight lower surface which are oriented substantially parallel to each other.
17. The end closure of claim 11 , wherein said junction is positioned between about 0.107 inches and about 0.037 inches below an uppermost portion of said peripheral curl prior to double seaming.
18. The end closure of claim 11 , wherein said substantially circular center panel is raised above said lowermost portion of said countersink a distance of between about 0.070 inches and about 0.110 inches.
19. The end closure of claim 11 , wherein the generally U-shaped cross-sectional configuration of said countersink is formed by a first countersink radius of curvature below said inner wall portion of said countersink and a second countersink radius of curvature below said outer wall portion of said countersink, wherein said first countersink radius of curvature is between about 0.009 inches and about 0.029 inches and said second countersink radius of curvature is between about 0.009 inches and about 0.016 inches.