What is the difference between the modern gin and the whitney gin?

Eli Whitney patented a mechanical way to process cotton gin in 1794. Whitney's gin pull the cotton through a combination of a wire screen and small wire hooks, while he prevent jams by using brushes that continuously remove the loose cotton lint. Modern gin uses modules to transport cotton and therefore it is needed to use spiked rollers to remove the cotton, then the cotton is held by rapidly rotating saw cylinders.