| 摘要 |
An innovative container lid having an integrally formed tamper evident band that goes through a series of changes or metamorphoses during the manufacturing and application process. The tamper evident band is attached to the lid at weak points on dogs formed around the periphery of the lid. Before use, the tamper evident band has a diameter substantially larger than the outer diameter of the lid. When the lid is installed in a container, and tangential and radial forces are applied to the periphery of the lid, the attachment points of the tamper evident band rupture and the band is displaced in a rippling effect with the dogs locking into sockets formed in the sidewall of the tamper evident band. Continued pressure is applied to the side of the tamper evident band until it is pressed firmly around the entire periphery of the lid against the side of a container with all the dogs engaged in sockets. At the final stage, a special breakaway dog engages a socket at the end and the band slips to a new diameter with the end overlapping the beginning to form a pull tab. The lid with the integrally formed tamper evident band is designed to make it easy to handle, stack, feed, decorate, print, box and ship lids while at the same time, providing an effective protection against tampering.
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