| 摘要 |
TAMPER INDICATING PACKAGE A tamper indicating package comprising a one-piece molded closure of plastic which threads onto a container such that when the closure is unthreaded, a tamper-indicating ring becomes separated from the lower end of the closure skirt. The indicating ring or band is joined to the closure along a weakened frangible line and a flexible stop ring is formed within the band and extends inwardly and upwardly when the closure is applied to a container finish. The container finish has a first radial bead, a second radial bead spaced axially below the first bead, and an intermediate tapered or concave surface between the first radial bead and second radial bead A further surface extends from the second bead axially downwardly and radially inwardly and the flexible end of the stop ring rests on this surface between the two beads, when the closure is applied. When the closure is unthreaded to remove it, the free end of the stop ring passes over the second bead into the recess formed by the surface between the two beads and the frangible portion is broken leaving the ring and band in this position. Upon subsequent reapplication of the closure, the closure skirt engages the band causing the band to pass over the second bead on the finish so that the band falls away but remains on the container to indicate that the band has been severed. |
