Show ALLIS CHALMERS FRUE VANNER the prue frue vanner for fine concentration is is admitted to be among the best in the market this machine has an endless rubber belt with flanged sides supported by rollers so as to form an inclined rubber surface four feet or six feet wide and twelve feet long the belt travels up an incline and then down and around a lower drum which dips into a water tank in which the mineral is collected in addition to its travel the belt receives a steady shaking or setting motion from an eccentric shaft along 0 one side the shake being at right angles to the inclination and travel of the belt the ore is fed upon the belt about three feet from the head of the machine in a uniform stream across its entire width and flows down the incline subjected to the steady shaking motion which deposits the mineral on the belt at the head of the belt is a row of water jets the travel of the belt brings the deposited mineral upward while the water jets wash back the lighter sand letting only the heavy mineral pass and become deposited in the water tank below A complete description of a standard machine and valuable information is given in the allis chalmers latest bulletin no 1427 a copy of which can be had upon application |