End unit and liner for aerosol containers

Claim 1

The combination of an end unit and a liner, said end unit having a central opening defined by an inner peripheral edge, an outer peripheral edge of said end unit being adapted for securement to a can body, said liner being a collapsible productreceiving liner having axially opposite ends, said liner being constructed from flexible inherently reboundable material, said end unit being in external telescopic surrounding relationship to one of said liner ends, cooperative mechanical interlocking means between said inner peripheral edge and said one liner end for securing said end unit and liner in assembled relationship, said inner peripheral edge being formed as a curl having a radially innermost bight portion defining a predetermined minimum diameter of said central opening, said interlocking means being an outwardly opening peripheral groove of a generally semicircular radial cross section in which is snugly received said curl, said groove includes a bight portion having a diameter corresponding generally to said predetermined diameter of said radially innermost curl bight portion, said groove further being defined by an annular radially outwardly directed wall portion at axially opposite sides of said groove bight portion, an uppErmost one of said annular wall portions terminating at a free edge overlying said curl and being of a diameter greater than said predetermined minimum diameter, and each of said annular wall portions having a diameter greater than said predetermined diameter whereby disassembly of said end unit and said liner is precluded under the influence of axial forces tending to separate said end unit and liner.