| 摘要 |
A tamper indicating closure includes an outer cap (20) carrying an inner liner (30) which relies on relative movement of the outer cap and the inner liner during opening movement to indicate tampering (e.g. by "opened" on liner appearing in aperture 60 in the cap) with the container after it has been sealed for the first time, the relative movement being ensured by a friction surface (34) which coacts with the inner surface (35) of an opening in the container to resist rotation of the liner and maintain it in a sealed condition while the outer cap is being rotated in an opening direction. Once opened, the outer cap (20) and the inner liner (30) are maintained in a position for movement as a unit in both the opening and closing direction of the closure. On initial application to the container drive elements (50) in the cap engage surfaces (46) on the liner and "sealed" appears in aperture (60) and on first opening of the container the drive elements pass over ramps 66 into the spaces between surfaces (48) and (68) and "opened" appears in the aperture (60) and the drive elements are thereafter retained in those spaces. <IMAGE> |
