Complex sentence: In 1799 "Robert le Jeune" patented the first machine to produce'continuous paper', which was the core of the Fourdrinier machine, the basis for most modern papermaking.
Split into simpler sentences: In 1799 "Robert le Jeune" patented the first machine to produce'continuous paper',. This invention was the core of the Fourdrinier machine, the basis for most modern papermaking.