Conveyors have a long history, our old high-turning barrel carriage and the overturned carriage for lifting water are the dimensional forms of bucket elevators and scraper conveyors.The conveyor is a material tray transport machine that conveys material in succession on a certain circuit, also known as a succession of conveyors. 17 century, the United States began to apply overhead ropeways to convey bulk materials; 19 century, a variety of contemporary structure of the conveyor appeared one after another. 1868, in Britain appeared belt conveyor; 1887, in the United States appeared screw conveyor; 1905, in Switzerland appeared steel belt conveyor; 1906, in Britain and Germany appeared inertia conveyor. In 1906, inertia conveyors were introduced in the UK and Germany.
Since then, conveyor belt conveyors have been influenced by the improved skills of the machine building, electrical, chemical and refining industries and have been continuously improved. Gradually, it has evolved from conveying within the workshop to moving materials within the company, between companies and even between cities. Belt conveyor become an indispensable part of the material handling system mechanization and automation. The high conveying capacity and long transport distances of the conveyors, as well as the possibility to perform several process operations simultaneously in the conveying process, make this a very intensive application.
In 1858 a reinforced skeleton appeared; in 1868 a rubber conveyor belt with a two-ply skeleton appeared; in 1892 Thomas Robbins O. solved the problem of rubber conveying into grooves and later invented synthetic fibres, which were twisted with nylon or polyester for the warp, improving the groove-forming and strength of the conveyor belt, a series of inventions that led to the development of conveyor belts for coal, ore and other products; then came the invention of flame retardant belts. In 1901, Sandvik invented and began producing steel conveyor belts; in 1905, Reed Sutcliffe invented the first conveyor belt for coal mines which revolutionised the mining industry; in 1913, Henry Ford introduced the conveyor line at the Ford Motor Company’s Highland Park, Michigan plant; in 1972, RE created the longest linear belt conveyor in New Ledonia at the time In the world, in the French community 13.8 km long, acanthe Marcel Bocchetti was the concept designer; in 1957, BF Goodrich patented the conveyor belt system which continues to produce conveyor belts for turnover. Combined with the half-twist, it had the advantage of being a longer life conventional belt, as it could expose all its surface area to wear. Möbius belts are no longer produced as twist-free modern belts can be more durable by constructing them in several layers of different materials. the late 1920s also saw the advent of aramid, which made it possible to run ultra-long distances of tens of kilometres.
Canvas, a coarser and thicker cotton fabric, was named after the Vikings in northern Europe who first used it for sails in the eighth century. So some people think that canvas and sailing ships should have appeared at the same time, but this is not the case.
Canvas has an extremely long history and was used extensively in ancient Roman times. Because of its multi-stranded weave, canvas is strong, hard-wearing and dense, and was used by the Romans to make wrist covers for training eagles. The densely woven, thick canvas also had good waterproofing properties and was eventually used in large numbers by the Romans to make their marching tents. The first modern parachute was made from canvas, the first modern football had a rubber core with a canvas surface, and the world’s first oil painting appeared in the fifteenth century on a thick, hard-wearing canvas. In the early sixteenth century, canvas was brought to the Americas by merchants, and at the beginning of European immigration to the Americas, canvas bags became a favourite of people who wanted freedom and were full of adventure. In China in the 1960s and 1970s, the army green canvas school bag became a fashion item. As technology progressed and textile techniques improved, the range of canvas became more diverse and its applications more widespread.
In the tenth century, we entered the era of environmental protection and canvas, an environmentally friendly fabric, gained more recognition. Although canvas is not flashy and showy enough, it is a little more casual and understated, and the new canvas concept will carry new fashion ideas and step into the field of fashion.