This present invention intends to provide a continuous type vertical planetary ball mill performing with high efficiency. In this ball mill, a mill pot is provided with an entrance and an exit which are vertically open. The entrance communicates with a charging port of a charging case which rotates together...http://www.google.fr/patents/US5522558?utm_source=gb-gplus-shareBrevet US5522558 - Continuous type vertical planetary ball mill
