Geng Peter, Gueniat Robert, Zollinger Alfred, Luscher Walter, Schawalder Hansjorg, Tschanen Hanspeter: Apparatus for filling a receptacle with compacted pulverulent material. Gericke & Co, Kleeman Werner W, January 29, 1974: US3788368 (57 worldwide citation)

An apparatus for filing a receptacle with compacted pulverulent material comprising a compaction compartment equipped with a closable inlet and outlet. A negative pressure source, atmospheric pressure and/or an overpressure source can be connected via a filter mechanism with the compaction compartme ...