oppure
hopper with a centrifugal system

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...tramoggia in acciaio inox AISI 304 per alimentazione tappi con sistema di sgolfamento centrifugo per minimizzare la creazione di polveri di sughero...
www.customsrl.it/ita_prod_bot_alpha_tappatore.htm

A stainless steel AISI 304 hopper with centrifugal disingulfment system feeds the corks to the compression unit by means of a chute. This special system is suitable to eliminate the production of cork dusts.
www.eurostar.it/monoblocchi_scheda_eng.html

Centrifugal rotary feeders use a bowl that spins and forces parts to the outside of the bowl. At the outside edge of the bowl, the parts are channeled into receivers when the parts are in the right orientation. From the receiver, they go onto a track that moves the parts to the next stage of production. Centrifugal feeders are usually faster and less noisy than vibratory feeders. They also tend to mar parts less than other types of feeders process equipment.globalspec.com/ProductGlossary/Manufacturing_Process_Equipment/ Material_Handling

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