Coated metal closures
AssigneeCrown Packaging Technology, Inc.
InventorPaul Robert Dunwoody
Life of this patent
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Abstract
A metal closure (1) comprising a panel (10) and a depending side wall (14) terminating in a cut edge (15), the inner surface of the closure having a plurality of coating layers applied (21-27) such that at least one of the coating layers extends to the cut edge and the coating thickness at and in proximity to the cut edge is less than the thickness at one or more other regions of the inner surface.
Claims15
A metal closure comprising a panel and a depending side wall terminating in a cut edge, the inner surface of the closure having a plurality of coating layers applied such that a first coating layer of the plurality of coating layers extends over an entire surface of the closure and a second coating layer of the plurality of coating layers extends over at least a central panel region of the panel, the second coating layer being spaced inwardly from the cut edge, wherein a coating thickness between the panel and the cut edge is less than a coating thickness on the central panel region of the panel, wherein the closure further has a sealing compound applied to an outer panel region on the top of the plurality of coating layers, the outer panel region being positioned between the panel and the side wall, and wherein the coating layers maintain adhesion of the sealing material to the outer panel region.
A metal closure comprising a panel and a depending side wall terminating in a cut edge, the depending side wall being positioned circumferentially about and extending radially outward from the panel to the cut edge, an inner surface of the closure having a plurality of coating layers applied such that at least one first coating layer of the plurality of coating layers is applied to a surface of the side wall, and at least one second coating layer of the plurality of coating layers is applied to a surface of the panel, wherein a coating thickness of the at least one first coating layer is less than a coating thickness of the at least one second coating layer.
A metal closure consisting essentially of:
- a panel and a depending side wall terminating in a cut edge,
- a plurality of coating layers, an inner surface of the closure having the plurality of coating layers applied such that a first coating layer of the plurality of coating layers extends over an entire surface of the closure and a second coating layer of the plurality of coating layers extends over the panel spaced inwardly from the cut edge,
- wherein a coating thickness between the panel and the cut edge is less than a coating thickness on the panel, wherein the closure further has a sealing compound applied to an outer panel region on the top of the plurality of coating layers, the outer panel region being positioned between the panel and the side wall.
A metal closure consisting of:
- a panel and a depending side wall terminating in a cut edge,
- a plurality of coating layers, an inner surface of the closure having the plurality of coating layers applied such that a first coating layer of the plurality of coating layers extends over an entire surface of the closure and a second coating layer of the plurality of coating layers extends over at least a central panel region of the panel, the second coating layer being spaced inwardly from the cut edge,
- wherein a coating thickness between the central panel region of the panel and the cut edge is less than a coating thickness on the panel, wherein the closure further has a sealing compound applied to an outer panel region on the top of the plurality of coating layers, the outer panel region being positioned between the panel and the side wall.
Dependencies are inferred from the claim text.