Volumetric feeder for powdery- or granular-material and powdery- or granular-material combination weigher

摘要

A volumetric feeder made of a plurality of independent feeder elements 20a, 20b. Each of the feeder elements is provided with a stationary portion 21 and a movable volumetric measure 22 that moves back and forth in the stationary portion 21. Each movable volumetric measure is provided with a measure portion 23 for accommodating a predetermined volume of powdery or granular material. The movable volumetric measure in the feeder elements are capable of moving independently of one another between a charging position at which the measure portions 23 coincide with charging apertures 24 of the stationary portion 21, and a discharging position at which the measure portions 23 coincide with discharging apertures 26 of the stationary portion 21.