A can end member has a center panel, a circumferential chuck wall, and a transition wall. The center panel is centered about a longitudinal axis and has a peripheral edge. The center panel also has a step portion located radially outwardly from the longitudinal axis. The step portion has an annular
A can end member has a center panel, a circumferential chuck wall, and a transition wall. The center panel is centered about a longitudinal axis and has a peripheral edge. The center panel also has a step portion located radially outwardly from the longitudinal axis. The step portion has an annular convex portion joined to an annular concave portion and displaces at least a portion of the center panel vertically in a direction parallel to the longitudinal axis. The curl defines an outer perimeter of the end member. The circumferential chuck wall extends downwardly from the curl to the transition wall. The transition wall connects the chuck wall with the peripheral edge of the center panel. The transition wall comprises a folded portion. The folded portion has a first leg, a second leg, and a third leg. The first leg is directly connected to the chuck wall and joined to the second leg by a concave annular portion. The second leg is joined to the third leg by a convex annular portion, and the third leg is joined to the center panel. The convex annular portion has a radius of curvature greater than 0.002 ins.
대표청구항▼
We claim: 1. An easy open can end member comprising: a center panel positioned about a longitudinal axis perpendicular to a diameter of the center panel, the center panel including a closure member for sealing the end member, a portion of the closure member is retainable to a portion of the center
We claim: 1. An easy open can end member comprising: a center panel positioned about a longitudinal axis perpendicular to a diameter of the center panel, the center panel including a closure member for sealing the end member, a portion of the closure member is retainable to a portion of the center panel once the easy open can end member is opened; a curl defining an outer perimeter of the end member; a circumferential chuck wall extending downwardly from the curl; and a transition wall connecting the chuck wall with a peripheral edge of the center panel, the transition wall comprising a folded portion, the folded portion having a first leg, a second leg, and a third leg, the first leg connected to the chuck wall and joined to the second leg by a concave annular potion, the second leg joined to the third leg by a convex annular portion, and the third leg joined to the center panel, the convex annular portion having a radius of curvature greater than 0.002 ins. 2. The easy open can end member of claim 1 wherein the second leg extends upwardly and outwardly relative to the longitudinal axis. 3. The easy open can end member of claim 2 wherein the third leg extends inwardly relative to the longitudinal axis. 4. The easy open can end member of claim 3 wherein the first leg extends downwardly and inwardly relative to the longitudinal axis. 5. The easy open can end member of claim 4 wherein the third leg further extends downwardly. 6. The easy open can end member of claim 5 wherein an annular curved portion joins the third leg to the center panel. 7. The easy open can end of claim 1 wherein a first end of the second leg is joined to the concave annular portion, an opposing second end of the second leg is joined to the convex annular portion, a first end of the third leg is joined to the convex annular portion, and an opposing second end of the third leg is interconnected to the center panel, the first end of the second leg and the second end of the third leg converging. 8. The easy open can end member of claim 1 wherein the closure member is a displaceable tear panel. 9. An easy open can end member comprising: a center panel positioned about a longitudinal axis perpendicular to a diameter of the center panel, the center panel including a closure member for sealing the end member, a portion of the closure member is retainable to a portion of the center panel once the easy open can end member is opened; a curl defining an outer perimeter of the end member; a circumferential chuck wall extending downwardly from the curl; and a transition wall connecting the chuck wall with a peripheral edge of the center panel, the transition wall comprising a folded portion, the folded portion having an upper vertical extent at least 0.035 ins. above a lower vertical extent of the center panel and located radially outwardly of a radially innermost portion of the chuckwall. 10. The easy open can end member of claim 9 wherein the folded portion comprises a first leg, a second leg, and a third leg, the first leg directly connected to the chuck wall and joined to the second leg by a concave annular portion, the second leg joined to the third leg by a convex annular portion, and the third leg joined to the center panel, the vertically upper extent of the folded portion comprising a portion of the convex annular portion. 11. The easy open can end of claim 9 wherein the folded portion extends upwardly above a horizontal plane defined by the lower vertical extent of the center panel at an angle greater than 1 degree. 12. The easy open can end member of claim 11 wherein the folded portion comprises a first leg, a second leg, and a third leg, the first leg directly connected to the chuck wall and joined to the second leg by a concave annular portion, the second leg joined to the third leg by a convex annular portion, and the third leg joined to the center panel, the vertically upper extent of the folded portion comprising a portion of the convex annular portion. 13. The easy open can end member of claim 12 wherein a portion of the convex annular portion has a radius of curvature greater than 0.002. 14. The easy open can end of claim 9 wherein a first end of the second leg is joined to the concave annular portion, an opposing second end of the second leg is joined to the convex annular portion, a first end of the third leg is joined to the convex annular portion, and an opposing second end of the third leg is interconnected to the center panel, the first end of the second leg and the second end of the third leg converging. 15. An easy open can end member comprising: a center panel positioned about a longitudinal axis perpendicular to a diameter of the center panel, the center panel including a closure member for sealing the end member, a portion of the closure member is retainable to a portion of the center panel once the easy open can end member is opened; a curl defining an outer perimeter of the end member; a circumferential chuck wall extending downwardly from the curl; and a transition wall connecting the chuck wall with a peripheral edge of the center panel, the transition wall comprising a folded portion, the folded portion having a first leg, a second leg, and a third leg, the first leg connected to the chuck wall and joined to the second leg by a concave annular portion, the second leg joined to the third leg by a convex annular portion, and the third leg joined to the center panel, the convex annular portion having a radius of curvature greater than a radius of curvature of the concave annular portion. 16. The easy open can end of claim 15 wherein a first end of the second leg is joined to the concave annular portion, an opposing second end of the second leg is joined to the convex annular portion, a first end of the third leg is joined to the convex annular portion, and opposing second end of the third leg is interconnected to the center panel, the first end of the second leg and the second end of the third leg converging. 17. The easy open can end of claim 15 wherein the folded portion extends upwardly above a horizontal plane defined by the lower vertical extent of the center panel at an angle greater than 1 degree. 18. The easy open can end member of claim 15 wherein a portion of the convex annular portion has a radius of curvature greater than 0.002 ins. 19. The easy open can end member of claim 15 wherein a portion of the concave annular portion has a radius of curvature less than 0.030 ins. 20. The easy open can end member of claim 15 wherein a portion of the convex annular portion has a radius of curvature greater than 0.002 ins., and a portion of the concave annular portion has a radius of curvature less than 0.030 ins. 21. The easy open can end member of claim 15 wherein the folded portion has an upper vertical extent at least 0.035 ins, above a lower vertical extent of the center panel. 22. An easy open can end member comprising: a center panel positioned about a longitudinal axis perpendicular to a diameter of the center panel, the center panel including a closure member for sealing the end member, a portion of the closure member is retainable to a portion of the center panel once the easy open can end member is opened; a curl defining an outer perimeter of the end member; a circumferential chuck wall extending downwardly from the curl; and a transition wall connecting the chuck wall with a peripheral edge of the center panel, the transition wall comprising a folded portion, the folded portion having a first leg and a second leg wherein a first end of the first leg is joined to a concave annular portion, an opposing second end of the first leg is joined to a convex annular portion, a first end of the second leg is joined to the convex annular portion, and an opposing second end of the second leg is interconnected to the center panel, the first end of the first leg and the second end of the second leg converging.
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이 특허에 인용된 특허 (44)
Bj.o slashed.rnsen Petter Konrad,NOX, Beverage can device.
Bachmann Henry C. (Dayton OH) Brown Omar L. (Dayton OH) Fraze Ermal C. (Dayton OH) Wynn David K. (Dayton OH) Gregg James R. (Springboro OH), Method and apparatus for making shells for can ends.
Taube William L. (Murrietta CA) Roberts David A. (Wokingham GB2), Method of forming a one-piece can body having an end reinforcing radius and/or stacking bead.
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