Patent ID: 7520403
Filing Date: 2009-04-21
Classification: B21D,B65D

Abstract:
1. A method of installing a metal annular flange into a metal container end panel comprising the following steps: a) creating an opening and a raised wall surrounding said opening as part of said container end panel; b) providing a metal annular flange having an upper flange lip and a sidewall, said upper flange lip including an inner wall surface and an outer surface, said sidewall having two sections that are axially adjacent with one section being radially offset from the other section; c) inserting said annular flange into a pocket formed by said raised wall; d) forming said container end panel over and around said flange with a recessed portion located beneath said radial lip adjacent said one section of said sidewall, an outer wall adjacent said radial lip, an upper wall section extending across said radial lip and an inner wall radially sandwiching said radial lip between said inner wall and said outer wall, said forming step resulting in said inner wall being larger in an axial direction than said outer wall.