Apparatus including a channel defining member and a movable flow control device cooperating therewith for exercising variable control over the rate of delivery of charge material from a hopper to a furnace is disclosed. The channel defining member approximates an oval shape and the flow control device...http://www.google.fr/patents/US4074835?utm_source=gb-gplus-shareBrevet US4074835 - Furnace charger with discharge channel having approximate oval cross-section
Furnace charger with discharge channel having approximate oval cross-section
