US 12,291,371 B2
Method for forming a curl and a threaded metallic container including the same
Cedric Fanton, Lyons (FR)
Assigned to BALL CORPORATION, Westminster, CO (US)
Filed by Ball Corporation, Westminster, CO (US)
Filed on Feb. 3, 2023, as Appl. No. 18/164,361.
Claims priority of provisional application 63/306,755, filed on Feb. 4, 2022.
Prior Publication US 2023/0249865 A1, Aug. 10, 2023
Int. Cl. B65D 1/02 (2006.01); B65D 83/38 (2006.01)
CPC B65D 1/0246 (2013.01) [B65D 1/0207 (2013.01); B65D 83/38 (2013.01); B65D 2401/00 (2020.05)] 19 Claims
OG exemplary drawing
 
1. A sealable container, comprising:
a metallic body with a hollow interior, a closed bottom, a neck extending away from the closed bottom, a body thread formed on a portion of the neck, a curl positioned at an end of the neck and formed in a curl portion above the body thread, an opening defined by the curl, and a transition portion positioned between the body thread and the curl portion;
a removable closure comprising a gas or fluid channel, a casing, and a closure thread formed in the casing; and
a gasket in contact with an upper portion of the curl, wherein the curl has an upper surface that is flattened to define a planar section,
wherein the body thread of the neck engages the closure thread when the removable closure is coupled to the neck such that the gas or fluid channel passes through the removable closure and the gasket to extend into the metallic body when the removable closure is removably coupled to the metallic body via engagement of the closure thread and the body thread, wherein contact of the gasket with the curl generates a seal between the gasket and the curl and seals the opening of the metallic body, wherein the curl increases a contact surface between the neck and the gasket by an amount at least twice a thickness or gauge of a metal forming the curl portion, wherein the planar section of the curl has a second thickness less than the thickness or gauge of the metal forming the curl portion, wherein the flattened upper surface of the curl further increases the contact surface between the curl and the gasket as compared to a neck having a non-curled end, and wherein the curl reduces or eliminates damage to the gasket during at least one of the removable closure being coupled to or uncoupled from the neck as compared to a neck having a non-curled end.