For production lines, a 2 tier conveyor belt system can help increase productivity and efficiency.
Having one single belt conveyor is always a good idea to improve product flow, but having two working together gives added flexibility.
For example, one conveyor can take a heavy component and the other belt take a lighter product at a higher level.
One conveyor can take products in one direction and the other in the opposite direction to take away empty boxes or containers, even waste materials.
Also, one conveyor could feed one side of a twin production line, while the other belt feeds another.
The possibilities are limitless, so next time you are planning a production line for your factory, have a think about a two tier belt conveyor may help you.