Patent ID: 8141745

Claim:
An ejection device for a mass-containing package ( 12 ), comprising two piston rods ( 16 ) extending parallel to each other and spaced from each other and each having teeth ( 17 ) extending along a longitudinal extent thereof; and a drive unit ( 21 ; 41 ) for displacing the two piston rods ( 16 ) and including two gear wheels ( 24 ; 44 ) directly engageable with respective teeth ( 17 ) of the two piston rods ( 16 ) and displaceable from a first position, in which they engage the respective teeth ( 17 ) of the two piston rods ( 16 ), to a second position in which they are disengaged from the respective teeth ( 17 ) of the two piston rods; a drive motor ( 22 ) for driving the two gear wheels ( 24 ; 44 ); and a common rotational axis ( 26 ) extending parallel to rotational axes ( 25 ) of respective gear wheels ( 24 , 44 ) and about which the drive unit ( 21 ) rotates, together with the gear wheels ( 24 ); for displacing the gear wheels ( 24 ; 44 ) from the second position in which the gear wheels are disengaged from the respective teeth of the two piston rods into the first position in which the two gear wheels engage the respective teeth of the two piston rods.