Closure cap with a linerless seal and a method for forming such closure and seal
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United States of America Patent
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-
Nov 24, 1987
Grant Date -
N/A
app pub date -
Dec 12, 1985
filing date -
Dec 12, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A linerless cap for a container and a method of forming the cap. In the method the cap is molded from plastic and includes a top wall, an outer depending skirt and an internal depending substantially annular wall having an upper end integral with and depending from the top wall and a lower free end. Thereafter the free end is engaged by an essentially concave surface of a curling tool to progressively turn the free end away from the internal wall to curve the free end into a curvilinear compressible and resilient free end adapted to be engaged for sealing. The engageable free end of the seal can have a coil, O, U, J or quarter round cross sectional shape and can be a rim, plug or corner seal.
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