A process and apparatus for washing fibre stock. The fibre stock is passed along a passage 14 from a stock inlet 15 to a stock outlet 16. The passage is defined by a portion of the inner surface of a substantially horizontal cylindrical screen 4, preferably a wire gauze. Washing liquid such as water...http://www.google.es/patents/US4557120?utm_source=gb-gplus-sharePatente US4557120 - Apparatus for washing fibre stock