Patent ID: 6213322
Filing Date: 2001-04-10
Classification: B65D

Abstract:
A container for photoprocessing materials, comprising:a container body, an opening and a frangible closure closing said opening, said frangible closure comprising a closure sheet having a central weakness, said central weakness having a thickness and a central portion of greater thickness than the thickness of said central weakness so as to resist shearing of said central weakness; and, a lateral skirt surrounding said closure sheet, said lateral skirt and said closure sheet having at least a partial radial weakness therebetween for cooperating with the central weakness, said at least partial radial weakness defining a channel comprising spatially separated hinge points for enabling said central weakness to collapse into said radial weakness and preventing said closure sheet from separating from said lateral skirt when said closure sheet is under an applied pressure, said hinge points being molded into a top portion of said frangible closure and having a thickness greater than the thickness of said radial weakness.