Patent ID: 6555074
Filing Date: 2003-04-29
Classification: A47J

Abstract:
In an apparatus for extracting active principles from a herbal material using a percolation vessel with an inlet end at a top portion and a discharge end at a bottom portion and a valve positioned upstream from the discharge end, a filter positioned in a lower portion of the vessel and upstream of the discharge end, the filter and an adjacent vessel wall disposed above the filter forming a chamber to contain a bed of herbal material, the improvement comprising:a) a pump, a pump inlet connected to the discharge end of the vessel and a pump outlet connected to the inlet end of the vessel; b) a heating mechanism surrounding the adjacent vessel wall so that the bed of herbal material is heated; and c) a temperature sensing and control device for controlling output of the heater and for maintaining the bed of herbal material at an elevated temperature between room temperature and up to 60Â° C.