Fuente: WIPO "essential oil or extracts" An apparatus and system for extracting essential oil from plant material, and in particular, cannabis plant material, is described. The apparatus has top and bottom rollers that apply heat and pressure to the plant material as the plant material passes through the rollers for the extraction of essential oil. The top and bottom rollers are powered by a hand crank or motor, and the top and bottom rollers are heated by heaters regulated by a temperature controller. Also described is a method that uses a combination of heat, pressure, and speed for efficient extraction of high quality essential oil from plant material, and in particular, cannabis plant material.