Metal packaging can and method of making it
AssigneeHoogovens Groep B.V.
InventorFrederik Jonker
Life of this patent
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Abstract
Metal packaging can body, for use in forming a can by attachment of at least one lid, has a generally cylindrical body portion and a flanging rim which is intended for the subsequent attachment of the body portion to the lid. The flanging rim is at least partly of wall thickness greater than that of the body portion. To save material and costs, the flanging rim has at least one portion which decreases in wall thickness in the axial direction away from said body portion. The invention is especially applicable to deep-drawn and ironed products.
Claims14
Metal packaging can body, for use in forming a can by attachment of at least one lid, comprising a body portion having opposite axial ends and at at least one said end a flanging rim which is intended for the subsequent attachment of said body portion to said lid by flanging of at least part of the flanging rim, said flanging rim being at least partly of wall thickness greater than that of the body portion and including at least one portion which decreases in wall thickness in the axial direction away from said body portion.
Metal packaging can body for attachment to a lid, having a generally cylindrical body portion and at at least one axial end thereof a flanging rim, wherein said flanging rim comprises, successively in the axial direction away from said body portion, a first portion of gradually increasing wall thickness, a second portion of maximum wall thickness, a third portion of gradually decreasing wall thickness and a fourth portion of constant wall thickness which is less than said maximum wall thickness.
A method of forming a metal packaging can body comprising (a) deep drawing and ironing a metal blank to form can body having a can body portion of generally cylindrical shape and a flanging rim at one axial end thereof, said flanging rim having a portion of maximum wall thickness greater than that of the body portion and having, axially more remote from said body portion than said portion of maximum wall thickness, a portion which decreases in wall thickness in the axial direction away from said body portion, and (b) trimming said can body by removing a part of said flanging rim while leaving at least part of said portion of maximum wall thickness.
Dependencies are inferred from the claim text.