Modern Conveyor belts
 

Back in those early days Modular plastic conveyor belts they were made using the materials they had at the time, such as wood, leather, rubber and canvas. It wasn't plastic modular conveyor belts until the early 1900 when things started to really evolve. Factories everywhere were using powered roller or belt conveyors to move heavy and large goods. Making factories workers mosaic jobs far more comfortable and enabling them to work more efficient. Modern synthetic material when the war made it impossible to get hold of rubber or canvas.