The history of the conveyor belts starting in the second half of the 17th century. Since then, the conveyors have been an inevitable part of the transport of material. But it was in 1795 that the conveyor belts became a popular means for transporting bulk materials. Initially, the conveyor belts were only used to move the bags of grain for shorter distances.

The conveyor belt system and work are very simple in the early days. The conveyor system was a flat wooden bed and a belt traveling on the wooden bed. Previously, the conveyor belts made of leather, cloth or rubber. This primitive system was very popular conveyor belt for transporting bulky objects from one place to another. In the early 20th century, applications of conveyor belts became broader.

Logan Goddard Hymle Company was the first to receive the patent for the roller in 1908. The roller conveyor business floundered. A few years later, in 1919, with technology and free carriers were used in the production of automobiles. Thus, the tools, conveyor belts became popular for transporting heavy goods in large factories.

During the 1920s, the conveyors were common, and also underwent major changes. Conveyor belts are used in coal mines for coal handling runs over 8 miles, and were made with layers of cotton and rubber covers. The longest conveyor belt currently in use is 60 kilometers long, in the phosphate mines in Western Sahara.

One of the turning points in the history of the conveyor belts was the introduction of synthetic conveyor belts. It was introduced during World War II, mainly due to the scarcity of natural materials like cotton, rubber and canvas. Since then, synthetic conveyor belts have become popular in various fields.

With the increasing demand in the market, many of the synthetic polymers and textiles began to be used in the manufacture of conveyor belts. Today, cotton, canvas, EPDM, leather, neoprene, nylon, polyester, polyurethane, polyurethane, PVC, rubber, silicone and steel are used in conveyor belts. Today, the material used to make a conveyor belt is determined by its implementation.

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The Screw Conveyor was invented in ancient Greece. It was originally used for lifting water. The credit for the invention is attributed to Archimedes. Even today, the basic design concept of the Conveyor Screw remains more or less the same except that power has replaced manual cranking to operate the equipment.

The mechanism of this relatively compact and efficient equipment is quite simple. The Conveyor Screw is fixed in a trough that usually rests horizontally on the floor on saddles and feet. A cover is placed over it. The other parts in the assembly include feed and discharge spouts, shrouds, flange, couplings, bearings and through ends. The only moving part is the screw. It picks up the material that is fed and conveys it to the other end as it rotates. Gates can be used to control the feeding and discharge.

These conveyors normally handle bulk dry materials. Since the trough is covered, dust contamination is not a real problem. The screws can be shafted or without shafts. They are available in different sizes. Normally they are used for straight line or slightly angled movement of materials. For certain applications, multiple screws are also used. The materials from which screws can be manufactured include steel, stainless steel, nylon and Teflon. Sometimes aluminum or brass is also used. Anti-corrosive treatments are normally given for steel screws. Since the screws are wear resistant, maintenance is minimal.

A more versatile version is the flexible Screw Conveyor, which is also referred to as a spiral conveyor. This is normally process-specific and has to be custom-made after taking into consideration various aspects of the operation for which it is used. It can convey materials horizontally, at different angles and even vertically.

Both fixed screw and flexible types are efficient, and simple to install and operate. The running costs are low. Cleaning is easy. They are almost maintenance-free.

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