Plug arrangement for a container

Claim 1

A plug arrangement for a metallic container having an opening in a top plate thereof, and having an annular turned-over wall along the circumference of the opening, comprising; an outer plug of soft, resilient material capable of being seated in said opening and having an annular flange capable of being seated over said annular turned-over wall of the opening, said plug having a peripheral wall capable of being seated in said opening, and a bottom wall, and said outer plug having a dish-shaped periphery; and, an inner plug capable of being seated in said dish-shaped outer plug and having a flange covering said annular flange of said outer plug, a peripheral wall conforming to the peripheral wall of said outer plug, and a bottom wall capable of being superposed on the bottom wall of said outer plug, said inner plug having a dish-shaped periphery and being made of metal which is readily deformable but not restorable in shape; said outer plug having a blind bottom, said bottom wall of said inner plug having an opening in the central portion thereof and further having a projection connected at one end by a stem portion to the outer circumference of said inner plug bottom wall and extending at the other end into said opening, said projection being located on said blind bottom when said inner plug is seated in said outer plug in superposed relation thereto, and said dish-shaped peripheral walls of said inner and outer plugs being bulged radially outwardly of the opening, when said inner plug is to be seated in said outer plug seated in said opening in superposed relation to each other, whereby said opening is tightly sealed.