| 摘要 |
<p>In a first step of the method, a prefabricated lid (1) is provided. The prefab lid has an outer and an inner side (2, 3). The lid has a continuous vent hole (4). The prefab lid is devoid of a protective finishing layer on the inner side of the lid. In a following step of the method, on the outer side of the lid a closure element (9) is fitted over the vent hole in the lid. In another step of the method, a protective finishing layer (5) is applied to the inner side of the lid, wherein the protective finishing layer closes off the vent hole and covers substantially the whole of the inner side. The protective finishing layer and the closure element are placed such that the protective finishing layer forms a connection with the closure element. By virtue of the connection, the removal of the closure element results in the breaching of the protective finishing layer.</p> |
