Can end
AssigneeRexam Beverage Can Company
InventorsTimothy Turner, Rajesh Gopalaswamy, Randall G. Forrest
Life of this patent
Estimating the term…
Abstract
A can end member has a center panel, a circumferential chuck wall, a transition wall, and a curl. The center panel is centered about a longitudinal axis and has a peripheral edge. The center panel has a peripheral edge. At least a portion of the peripheral edge includes coined segment. 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 has a folded portion extending outwardly relative to the longitudinal axis.
Claims13
A method for strengthening an easy open can end member having 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 joining the chuckwall to the center panel, comprising the step of:
- coining a peripheral edge of the central panel consisting of a planar portion;
- and
- forming a step portion along the peripheral edge of the center panel, the step portion having an annular convex portion joined to an annular concave portion and displacing at least a portion of the center panel vertically in a direction parallel to the longitudinal axis.
A method for strengthening an easy open can end member having 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, comprising the steps of:
- forming a transition wall connecting the chuck wall with a peripheral edge of the center panel, the transition wall comprising a folded portion;
- and
- coining at least a portion of a peripheral edge of the central panel subsequent to forming the transition wall.
A method for strengthening an easy open can end member having 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 joining the chuckwall to the center panel, comprising the step of:
- coining a peripheral edge of the central panel consisting of a planar portion.
Dependencies are inferred from the claim text.