Improvements in pneumatic elevators for flour mill stocks

701,136. Pneumatic elevators. SIMON, Ltd., H. Oct. 27, 1952 [Nov. 19, 1951], No. 27062/51. Class 78 (1) Aerated flour mill stock from a roller mill f passes through a pipe i into a casing j wherein it is separated from the air and is propelled by the blades m of a rotor into the pipe a where it is entrained by the air which has passed across the casing beneath its top. The separation of the air from the stock is assisted bv a baffle o. A balanced door n in the side of the casing opens if suction fails or there is an excess of stock in the casing. The pipe a delivers to a cyclone separator b to which suction is applied by a fan c. This fan delivers to a filter type separator d connected to a fan e. Additional air for elevating may be supplied by machines g, h. Specification 666,541 is referred to.