MECHANISM FOR CHARGING AND DISCHARGING A CLOSED CHAMBER UTILIZABLE AS A CONTINUOUS EXTRACTION TANK OF A VEGETABLE MATERIAL AND EXTRACTION PROCESS EFFECTED IN A TANK FITTED WITH SUCH MECHANISM

摘要

The extraction tank (1) carries an endless screw (13) on its upper portion and a conveyor belt of endless screws (17) on its lower portion to ensure its charging and discharging respectively, a complementary means employing a screw (7) with a vertical shaft on the upper portion and a shutter (22) mounted at the top of an evacuation tube (35) on the lower portion making it possible to obtain at each of these levels a plug (36, 37) of material that is tight to the fluids under pressure admitted into the tank. Application to vegetable material extraction units for the production of essential oils.