| 摘要 |
<p>The present invention relates to a method for opening an opening (10) with a plug (2, 2') or the like of elastic material, the outside diameter of which, in a static state (rL), is larger than the diameter (rp) of the opening (10) to be closed, and which plug (2, 2') has, at its end, a cavity (12). The method is characterised in that: (a) an extending device (4, 4') for the plug is attached to the plug (2, 2') by inserting the extending device (4, 4') into the cavity (12) of the plug (2, 2') to such an extent that the plug (2, 2') is pressed around the extending device (4, 4') so tightly that the plug (2, 2'), when being extended, remains extended around the extending device (4, 4'); (b) the plug (2, 2') is extended by inserting the extending element (20) of the extending device (4, 4') into the cavity (12) of the plug (2, 2') so deep that the outside diameter (rv) of the plug (2, 2') is equal to, or smaller than, the diameter (rp) of the opening (10) to be closed; (c) the extended plug (2, 2') attached to the extending device (4, 4') is inserted into the opening (10) to be closed; and (d) extension is reduced to such an extent that the plug (2, 2') closes the opening (10) and adheres to it so tightly that the extending device (4, 4') is detachable from the plug (2, 2'). The invention likewise relates to a corresponding method for opening the opening (10).</p> |
