| 摘要 |
A disc (13) is mounted so as to be pivotable about a horizontal pivot axis (19) in the door (4) of a jet machine. The said disc can be driven by means of a pivot drive (11) mounted on it on the outside of the door. The disc (13) supports a pear-shaped tumbling barrel (2) in such a way that when the tumbling barrel (2) is in its working position, it can be rotated about an axle (3) which is inclined obliquely upwards. If the disc (13) is rotated through 180 DEG , the axle (3) inclines obliquely downwards, so that the tumbling barrel (2) is then in a tipping position. <IMAGE>
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