Complex sentence: Dry ink (toner) particles are then electrostatically picked up by the drum's charged areas, which have not been exposed toum then prints the image onto paper by direct contact and heat, which fuses the ink to the paper.
Split into simpler sentences: Dry ink (toner) particles are then electrostatically picked up by the drum's charged areas, which have not been exposed to light. The drum then prints the image onto paper by direct contact and heat, which fuses the ink to the paper.