Patent ID: 6761280
Filing Date: 2004-07-13
Classification: B65D,Y10S

Abstract:
An end shell for a container of contents under pressure comprising:a substantially flat central panel portion; a panel radius extending downwardly from the periphery of said central panel portion; an annular countersink bead around said central panel portion including an annular panel wall extending downwardly from said panel radius around the periphery of said central panel portion, an upwardly open arcuate bottom wall having a width of about 0.020-0.040 inch as measured on the public surface of said end shell, and an upwardly projecting lower chuckwall portion; an annular upper chuckwall extending upwardly and outwardly from said lower chuckwall portion with a chuckwall bend between said upper and lower chuckwall portions; and a peripheral curved flange projecting outwardly from the top of said upper chuckwall for double seaming the end shell on a container body; wherein said lower chuckwall portion is substantially vertical, said upper chuckwall portion is disposed at an angle of about 20-35Â° to vertical, and a center of a radius of curvature of said chuckwall bend between said lower chuckwall portion and said upper chuckwall portion is within about 0.010 inch of a plane through the line of tangency of a straight portion of said central panel portion with said panel radius on the product side of said end shell, and said end shell has a countersink depth measured from the top of said peripheral curved flange to the upper surface of said arcuate bottom wall of said countersink bead at the bottom of the bead that is less than 0.250 inch.