| 摘要 |
The pulling rod (24) has circular curvature. It pivots about an axis (23) at the center of its own curvature. This axis is at right angles to the filling tube axis (2a) and is located on the sealing unit (11). The pulling rod (24) is semi-circular and pivots through 180degrees. Its axis (23) is offset to one side, relative to the filling tube axis. The sealing unit can be displaced from a working position in which its central axis (11a) is aligned with that of the filling tube (2), through about the same degree of side offset. Movement of the closure unit (11) first retracts the casing brake (5) from the filling tube. Returning the pulling rod into its rest position, moves the closure unit into its working position.
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