Abstract: The filling device comprises a delivery duct having a flow orifice associated with a plug, and a cleaning device comprising a collector pan fixed in leakproof manner to the delivery duct in the vicinity of the flow orifice and having a through orifice vertically in register with the flow orifice and a shutter member fixed to an actuator member so that together they form a rigid assembly which is mounted to move with helical motion about an axis normal to a plane containing the through orifice, the shutter member being off said axis.