may be seen from fig2 cleaning of the corresponding machine components can be brought about via the spray line 27 28 or spray nozzle 35 36 39 via the spray line 27 the conveyor chain 11 can be completely wetted cleaned and or rinsed down together with the chain guide 31 32 33 34 both in the region of the upper strand 29 and in the region of the lower strand 30 the interior of the hollow profile 38 which is otherwise difficult to access can also be wetted with a corresponding fluid and thus cleaned rinsed disinfected etc via the spray line 28 fig3 shows the spray unit 24 which comprises a collection tank 41 with an outlet 42 and three spray nozzles 43 44 45 the spray nozzles 43 44 45 are directed toward the conveyor chain 11 which revolves about the lower deflection roller 14 thus the spray unit 24 allows the conveyor chain 11 to be cleaned in the region of this lower deflection roller 14 and thus far away from the plane of conveyance of the packs formed from the packing troughs 4 under certain circumstances continuous operation of the spray unit 24 is possible at this point while the packing machine 1 is running generally however the cleaning is carried out in particular in the region illustrated in fig2 in pauses in the operation of the packing machine 1 in which no packs are produced filled sealed and cut so that there is no risk of the sprayed cleaning agent entering into contact with the packs in fig1 broken lines denote a further output line and branches 48 49 50 the branches 48 49 50 lead to the shaping station.