| 摘要 |
PROBLEM TO BE SOLVED: To provide a gate for discharging granule without leavings in a hopper or the like, a loss-in-weight-type powdery and particulate material constant feeder capable of dispensing the granule, and a single-vessel-type granule feeder capable of feeding successively the specified amount of the granule by using the hopper as a weighing scale. SOLUTION: The gate for discharging granule is constituted in such a way that one or a plurality of units comprising two sheets of valve plates to be movable right and left fixed at supporting points by hinges are arranged in parallel and the respective valve plates movable right and left are changed in attitude possition by each right- and leftdriving device or a single driving device, and the weight-reduction-type granule feeder is equipped with the above gate on the bottom of a vessel with a load cell. Installing the feeder feeding the granule on the upper part of the above feeder allows to operate to open and close automatically. The single-vessel-type granule feeder is constituted by further installing a granule feeder, separatory from the vessel, on the vessel.
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