| 摘要 |
521,779. Extracting essential oils. TENNANT, W. J. (Crown Cork & Seal Co., Inc.). Nov. 28, 1938, No. 34644. [Class 91] Rind oil is extracted from citrus and like fruits by passing the whole fruits along a curved conduit formed by fixed side walls and a movable bottom wall and of a width and depth much greater than the largest fruit, so that as the fruit rolls and bounces along the rind is pierced by projections on at least one of the walls. Suitably, the fruits are fed down a shoot 23 to the centre of a rapidly rotated table 14, are rolled and bounced along the spiral passages between thin steel strips 19, passed between strips 20 to a corresponding spiral passage and table, and discharged down the hollow shaft 6 to a chute 24 ; the tables 14 and strips 19 have a roughened or abrading surface, preferably of " fillet, " and the tables have holes and radial openings 29, so that liberated oil falls into a receiving pan 21 ; from nozzles above water or other liquid is sprayed on the fruit to wash the oil therefrom. The whole apparatus is tilted from left to right to assist the passage of the fruits. In a modified apparatus, Fig. 5, fruits are fed down a shoot 33 and passed up a cylinder 32 by a screw 35 while water is sprayed from nozzles 36. In an apparatus for batch operation a rotating table and concentric circular passages are used. |
