| 摘要 |
The invention relates to a drive unit for a packaging machine, with a main drive shaft 11, the rotary movement of which can in each case be converted into a lifting movement via individual gears 1, 2, 3 corresponding to the number of processing stations. According to the invention, the lifting movement of each gear can be individually switched off, for example by making it possible to disengage a lower roller 3 from the cam plate 1 via a piston/cylinder unit 9, the upper cam plate 2 being held in the upper position or being lifted a short distance from the cam plate 1. <IMAGE>
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