| 摘要 |
This relates to the provision of a button type closure with a tamper-indicating element that visually indicates when a container has been opened. A deflectable button on an actuator panel is utilized to fracture a disk of brittle material situated between the button and a rigid transparent plastic holder into which the actuator panel and brittle disk are inserted. The plastic holder not only carries the actuator panel and brittle disk, but it also has provisions to hold the deflectable button in its down position by pressing the down button tightly against a rib on the underside of the holder, thus holding the deflectable button in the down position before the closure is applied to a container. When the closure is applied to a container the container finish deforms a region on the actuator panel adjacent to the button, decreasing the overall height of the actuator panel, so that after application of the closure to a container, only the container finish is pressing the down button tightly against the rib on the underside of the holder, thus continuing to prevent the button from popping up. Upon opening the package, the separation of the actuator panel and container finish permits the deformed actuator panel and the transparent holder to separate also, releasing the down button, allowing it to flip back to its up position, striking the brittle disk and fracturing it, thus producing an irreversible indication that the package has been opened.
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