The invention relates to a defibrator comprising at least one rotary cylindrical drum provided on its inner surface with longitudinal deflectors, driven in rotation and axially supplied with material which is to be defibrated. On the inside, the defibrator comprises a rotor consisting of a shaft coaxial...http://www.google.es/patents/US4382559?utm_source=gb-gplus-sharePatente US4382559 - Defibrator
