| 摘要 |
A charging apparatus for finely ground particulate materials such as drugs or vitamin concentrates to supplement animal feed and the like, enabling control of the materials, accounting of the particulate materials being dumped and inhibiting exposure of workers to the materials, comprising an integral assembly having a suction fan above the hopper into which the material is dumped through an inlet opening, and bag filters between the hopper and the suction fan, as well as between the inlet opening and the suction fan. These bag filters collect air-entrained material dust into a layer which is discharged into the hopper by a momentary reverse flow of air through venturi nozzles to reclaim the material. The contents to be dumped can be weighed accurately and dumped in a fashion meeting OSHA standards and FDA requirements. The unit preferably is on tracks movable from one bin to the next. The interior of the structure has a suspended baffle which inhibits short circuiting of air from the product inlet to the suction unit. It also has a suspended flexible baffle adjacent the product inlet to prevent sudden outward displacement of air back through the product receiving opening when product is being dumped, preventing material from billowing out of the opening where the material enters. Bag filters and venturi flow nozzles facilitate a momentary reverse flow of air to discharge the layer of captured particulate material from the bag filters into the hopper.
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