PROBLEM TO BE SOLVED: To eliminate the current absence of an efficient metered feeder device for particulate matters that can accomplish its task in a short period of time in storing the object particulate matter into its intended container while securing the accuracy of the weight of the particulate matter to be metered.SOLUTION: A valve element driven by an electromotive cylinder is disposed at the outlet of a container into which a particular matter is to be poured. The aperture of this valve element permits stepless adjustment according to information from an electronic balance on which a container of the particular matter is mounted. The valve element is an arcuate plate whose outer face swells out, and the base of a fan-shaped flank of the arcuate plate is pivoted to be pivotal in the perpendicular direction.SELECTED DRAWING: Figure 7
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