초록

A powder feeding method includes the steps of injecting a gaseous medium into a powder material held in a hopper from a porous wall forming a funnel at a bottom part of said hopper, such that the injection of the gaseous medium is carried out intermittently.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for feeding a powder material into a container with a predetermined, controlled amount, comprising:a hopper for holding a powder material therein, said hopper having a bottom part forming a funnel, said funnel including a porous wall for injecting a gaseous m

[ What is claimed is:] [1.] An apparatus for feeding a powder material into a container with a predetermined, controlled amount, comprising:a hopper for holding a powder material therein, said hopper having a bottom part forming a funnel, said funnel including a porous wall for injecting a gaseous medium into said powder material therethrough, said funnel terminating in a downward directed outlet hole for ejecting said powder material to a container together with said gaseous medium;a control rod provided in said hopper in alignment with said outlet hole in a manner movable in a vertical, axial direction thereof, said control rod controlling a flowrate of said powder material through said outlet hole; anda supplying system for supplying said gaseous medium into said porous wall;said supplying system including a controller for controlling a supply of said gaseous medium such that said gaseous medium is injected intermittently, while filling said container, with a pause intervening between a gaseous medium injection and a next gaseous medium injection.