Tamper evident lid welded to a container
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United States of America Patent
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N/A
Issued Date -
Jun 23, 2005
app pub date -
Dec 17, 2003
filing date -
Dec 17, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A tamper-evident plastic lid is welded to a plastic container at a welded portion and a detachable, replaceable lid portion is formed by tearing a frangible portion on the lid's skirt thereby leaving a torn tamper-evident, welded lid portion fixed to the container rim. The illustrated lid is a plug-fit lid which has a plug-shaped portion comprising a depressed central panel and an encircling, upstanding wall that engages an inner side of the container rim wall to retain the separated lid portion when it is replaced on the container. An energy director preferably in the form of an encircling bead on the lid initiates the softening of the plastic of the bead for welding with the plastic of the container rim. The preferred frangible portion is a reduced cross-sectional thickness web in a horizontally and radially extending skirt wall on the lid skirt overlying a horizontally and radially extending rim wall on the container rim. The frangible portion may be located radially inwardly of the welded portion. A pull tab may be provided on the replaceable lid portion to assist in initiating the fracturing of the thin frangible web. A pry slot may also be provided to aid in locating where and how to separate the replaceable lid portion from the welded portion which is permanently attached to the container.
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