PRIMARY CRUSHING: MOBILE JAW CRUSHERS. Jaw crushers operate according to the principle of pressure crushing. The raw feed is crushed in the wedge-shaped pit created between the fixed crusher jaw, and the crusher jaw articulated on an eccentric shaft.
The following is quoted from the postcard described above: "Greetings from Anna-Jonesboro, Ill. - Anna Quarries adjacent to north city limits. Supplies steady payroll, has capacity of 3000 tons out-put of high grade industrial and agricultural lime-stone and hard-road stone.
During the first half of the nineteenth century, mechanical crushing was not cheaply available. Stone had been crushed for applications such as Macadam road metal exclusively by hand, using the cheapest available labour, such as convicts and workhouse inmates.
These days, we use them almost exclusively to transport skiers and snowboarders up snow slopes, but before the 1940s, aerial ropeways were a common means of cargo transport, not only in mountainous regions but also on flat terrain, with large-scale systems already built during the Middle Ages.
PRODUCTS LOADING SPOUTS. The telescopic chutes we produce are a perfect solution for dust free and automatic loading of tanks and open trucks. The inner cones are fitted to requirements of material, outer dust free cover is made of double side siliconed fabric with good elasticity in low and high temperatures.