B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 55/08 (2006.01) B65D 41/34 (2006.01)
Patent
CA 2055210
ABSTRACT A tamper resistant closure and a method of installing and removing that closure relative to a container where the container has a neck with external threads thereon and a ring located beneath the threads. The closure has a central portion with a periphery and a skirt extending from the periphery, a tear strip extending from the skirt, a tamper evident band extending from the tear strip and a movable flange extending from the band. The tear strip is affixed between the skirt and the band by a plurality of severable tabs. The flange is hinged to the tamper evident band and is movable between an upper position and a lower position. When the closure is installed on the container, the flange is forced against an interior of the band and overrides the ring. Once the flange has overridden the ring, a free edge of the flange moves inward to rest against an outer surface of the neck beneath the ring. The closure can then not be removed from the container without first severing the tabs as the flange will not override the ring during removal of the closure. The tabs are severed by manually grasping a handle of the tear strip and removing the tear strip. When the tear strip is removed, there is a relatively large gap between the skirt and the band, making it readily apparent that the contents of the container may have been tampered with. Once the tear strip has been removed, the closure functions in a conventional manner for opening and closing the container. With previous devices, the band is affixed to the skirt along a weakened line or through tabs without using a tear strip. To remove the closure for the first time, the closure is manually turned until all of the tabs are severed virtually simultaneously. If the tabs are too strong, it can be extremely difficult to open the container. If the tabs are too weak, some or all of the tabs become prematurely severed during the initial installation of the closure on the container or during shipping and handling. With previous closures, it is very difficult to manufacture closures with tabs of the proper strength as the tolerances for error are extremely narrow. The tabs of the present invention can be relatively strong as they are severed singly or in pairs and not all at once.
Pano Cap (canada) Limited
Schnurr Daryl W.
LandOfFree
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