| 摘要 |
The invention relates to a cap for an airtight container such as a glass or plastic bottle or jar, which cap is suitable to be placed releasably in a closing position on a neck of the container, wherein the cap is provided with visual indicating means for indicating that the cap is no longer in the closing position, wherein the indicating means are adapted to be brought into an active state when the cap is arranged on the neck of the container and to be brought into the indicating state when the cap is removed. These measures have the result that the indicator only becomes active, i.e. enters into the indicating state, when this state is preceded by an active state. The fact that it has to be successively subjected to two different states makes it easier to find such an indicator; use can after all be made of indicating means which are not normally active, for instance in the stored situation, and which are only activated by arranging thereof on the neck of the container. |
