Can end
AssigneeRexam Beverage Can Company
InventorsTimothy Turner, Rajesh Gopalaswamy, Randy G. Forrest
Life of this patent
Estimating the term…
Abstract
An end member for a container. The end member has a central panel, a circumferential chuckwall, and a transition wall. The central panel is centered about a longitudinal axis and has a substantially planar peripheral edge. The curl defines an outer perimeter of the end member. The circumferential chuckwall extends downwardly from the curl to the transition wall. The transition wall connects the chuck wall with the substantially planar peripheral edge of the central panel. The transition wall has a folded portion extending outwardly relative to the longitudinal axis.
Claims24
An easy open can end member comprising:
- a central panel centered about a longitudinal axis having a peripheral edge and a tear panel defined by fracturable score, the tear panel retained to the central panel along a non-scored hinge region;
- a curl defining an outer perimeter of the end member;
- a circumferential chuckwall extending downwardly from the curl;
- and
- a transition wall connecting the chuckwall with the peripheral edge of the central panel, the transition wall comprising a folded portion having a first end portion directly connected to the chuckwall and a second end portion connected to the central panel, the folded portion comprising an annular concave bend extending downwardly from the chuckwall, an annular convex bend extending upwardly from the annular concave bend, and a third bend joining the annular convex bend with the central panel wherein the third bend has a radius of curvature substantially defined by a lower extent of the annular concave bend.
An easy open can end member comprising:
- a central panel centered about a longitudinal axis having a peripheral edge;
- a curl defining an outer perimeter of the end member;
- a circumferential chuckwall extending downwardly from the curl;
- and
- a transition wall connecting the chuckwall with the peripheral edge of the central panel, the transition wall comprising a folded portion extending upwardly along the chuckwall, the folded portion comprising an annular concave bend extending downwardly from the chuckwall, an annular convex bend extending upwardly from the annular concave bend, and a third bend joining the annular convex bend with the central panel wherein the third bend has a radius of curyature substantially defined by a lower extent of the annular concave bend wherein the concave annular portion includes an apex in engagement with the peripheral edge of the central panel.
An easy open can end member comprising:
- a central panel centered about a longitudinal axis having a peripheral edge, a public side and a product side;
- a curl defining an outer perimeter of the end member;
- a circumferential chuckwall extending downwardly from the curl;
- and
- a transition wall connecting the chuckwall with the peripheral edge of the central panel, the transition wall comprising a fold including a concave annular portion having an apex engaging the peripheral edge of the central panel.
An easy open can end member comprising:
- a central panel centered about a longitudinal axis having a substantially planar peripheral edge, a public side and a product side;
- a curl defining an outer perimeter of the end member;
- a circumferential chuckwall extending downwardly from the curl;
- and
- a transition wall connecting the chuckwall with the peripheral edge of the central panel, the transition wall comprising a fold including a first leg extending downwardly from the chuckwall to a concave annular portion having a first apex in engagement with the public side of the peripheral edge of the central panel, a second leg extending upwardly from the convex annular portion to a convex annular portion, and a third leg extending downwardly from the convex annular portion to a radial bend portion joined to the peripheral edge of the central panel.
A method for forming an easy open can end member, the method comprising the steps of:
- providing a can end shell including a central panel centered about a longitudinal axis having a peripheral edge, a public side and a product side, a curl defining an outer perimeter of the can end shell, and a circumferential chuckwall extending downwardly from the curl joined to a transition wall;
- coining a hinge point between the chuckwall and the transition wall;
- and
- reforming the transition wall to form a fold having a first end portion directly connected to the chuckwall and a second end portion connected to the central panel wherein the fold is initiated at the hinge point.
Dependencies are inferred from the claim text.