| 摘要 |
Apparatus for changing bobbins of wrapping material in a cigarette making or packing machine has a magazine for a supply of fresh bobbins and a receptacle in front of the magazine. The receptacle receives from the magazine the foremost fresh bobbin when the web of wrapping material on the expiring bobbin is nearly exhausted. The expiring bobbin is located in a pocket between endless belt conveyors which are driven to unwind the web from the expiring bobbin. The fresh bobbin in the receptacle can be prepared for splicing of the leader of its web to the trailing end of the web on the expiring bobbin, and such splicing is carried out as soon as the trailing end of the web is separated from the fully expired bobbin. The core of the expired bobbin is ejected from the unwinding station before the fresh bobbin is transferred from the receptacle into the pocket between the driven belt conveyors by the pull of its web which is drawn into the consuming machine as well as by appropriate manipulation of the bottom part of the receptacle which can be designed to allow for a lowering of at least one of its components in a sense to induce a gravitational descent of the fresh bobbin from the receptacle into the unwinding station.
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