Method for filling containers with metered quantities of powdered materials

Abstract

The present invention concerns a method for obtaining a uniform dose for filling containers with metered quantities of powdered materials. The powdered materials are drawn from a rotating container by a plurality of dosing devices which are advanced by a conveyor along a predetermined path, at least a portion of which extends above the movable container. Each of the dosing devices comprises a tubular punch vertically movable relative to the movable container and to the conveyor. A piston reciprocates inside each tubular punch. The punch has an open end facing the movable container to define within the punch a variable volume dosing chamber. The method comprises locating the punches which are positioned above the movable container so that they are substantially in contact with the powdered material inside the movable container, wherein the piston positioned within each punch is arranged inside each punch so as to block the interior volume of the dosing chamber at the open end of the punch, and increasing the volume of the dosing chamber to a predetermined maximum by moving the punch relative to the piston toward the bottom of the movable container thereby allowing the powdered material to fill the dosing chamber to obtain a uniform dose.

Dependencies are inferred from the claim text.