| 摘要 |
<p>Tamper-evident closure apparatus for internally pressurized containers including a closure provided with a mehcan- ism for venting the internal pressurized gas upon initial unsealing of the container and a tamper-indicating device adapted to be acted upon by the vented gas to indicate that an initial unsealing of the container has occurred. The tamper-indicating device may be, for example, chemically activated to change colors when acted upon by the vented gas or may be mechanically activated so that venting of the pressurized gas causes a visibly apparent disruption, distorsion or the like to indicate initial unsealing of the container.</p> |
