Abstract:
A method for fractionating milling of cereals between two milling disks having annular working surfaces facing each other and composed of serrated segments, such that the desired fraction, for instance bakery flour, can be recovered by sifting even after a single passage of the milling material between the milling disks. The invention is characterized in that the serrate pattern of said segments comprises a plurality of straight, parallel ridges acting as cutting teeth alternating with parallel grooves and being so designed that the cutting teeth of each segment have a constant height and width and make such an angle with respect to the line of symmetry of the segment that the cutting teeth of each milling disk will intersect the lines of symmetry of each segment of the other milling disk at an angle of .+-..alpha..sub.1 for one milling disk and .+-..alpha..sub.2 for the other milling disk, such that the first cutting tooth of each segment of one milling disk will intersect the cutting teeth of the other milling disk at angles of intersection K which vary according to the relationship K=(.alpha..sub.1 +.alpha..sub.2).+-.x.degree. where .alpha..sub.1, .alpha..sub.2 is said angle between one cutting tooth of each segment in relation to said line of symmetry R.sub.x, and x is the sectoral arc angle of the segment.
Abstract:
THE PORTABLE CONE-TYPE RICE MILL EMBODIED IN THIS INVENTION CONSISTS OF AN UPSTANDING FRAME ON WHICH ARE ARRANGED IN A SUPER-IMPOSED MANNER STARTING FROM THE TOP, A HOPPER, A HULLER, A CONICAL GRAIN POLISHER AND A BRAN CHUTE. BETWEEN THE HULLER AND THE GRAIN POLISHER IS A HUSK ASPIRATOR CONNECTED TO A SUCTION BLOWER TO SUCK AWAY THE HUSK FROM THE GRAIN FALLING FROM THE HULLER, THROUGH THE ASPIRATOR DOWN TO THE POLISHER. CONNECTED TO THE BOTTOM OF THE POLISHER IS A GRAIN CHUTE AT THE END OF WHICH IS CONNECTED A CONDUIT COMMUNICATING WITH A SECOND SUCTION BLOWER. THE SECOND SUCTION BLOWER IS ADAPTED TO SUCK THE BRAN FROM THE POLISHED GRAIN FALLING FROM THE GRAIN CHUTE. A SUITABLE DRIVE MEANS MOUNTED ON SAID FRAME IS IN TURN CONNECTED TO THE COMMON SHAFT OF THE BLOWERS WHICH SHAFT IS IN TURN CONNECTED TO THE SHAFTS OF THE POLISHER AND HULLER WHICH ARE JOINED BY A MOVABLE COUPLING.