A drying apparatus for drying a moist material includes a container having an opening for receiving the material therein. A top cover is provided for closing the opening of the container. A heater and fan are provided on the bottom of the top cover so as to confront to the opening of the container when...http://www.google.es/patents/US5477623?utm_source=gb-gplus-sharePatente US5477623 - Drying apparatus
