A conveyer belt is a device that carries large quantities of material from one place to another. Here at the quarry, the belt carries all sizes of rock. Imagine having to do that by hand. It can be a dangerous machine to use. Without it, people would have a hard time carrying rocks from place to place. The conveyer belt is an endless belt that is flipped over two pulleys. Pulleys are a kind of simple machine. One of those pulleys is the drive pulley. The drive pulley helps the belt to move. If you're wondering what other simple machines are in the conveyer belt, we will tell you. The belt acts like an inclined plane. You can see the conveyer belts in action in these photos.