| 摘要 |
<p>A child resistant screw-on closure (10) is provided with the closure having a closure state indicating pattern and formed as a three-element closure. The outer cap (16) is arranged for rotation relative to the centrally located middle cap (14) and cooperates in a torquing manner with the middle cap so that as the closure is rotated to close the container, an indication (56) of full sealing is viewable through a window (58) of the outer cap only when such sealing is complete. Similarly, during rotative unsealing or opening of the container, the outer cap is the first to move relative to the remainder of the closure, so that the indication of complete sealing of the container is no longer viewable through the window just as soon as rotative opening of the container has begun. Thus, the closure provides the user with a readily apparent indication as to whether the container closure is in its fully closed or container-sealing condition.</p> |
