| 摘要 |
766,286. Filters. BENDIX AVIATION CORPORATION. Nov. 1, 1954 [Nov. 5, 1953], No. 31526/54. Class 46. A resin-impregnated pleated paper filter element is formed by first folding a flat sheet of the paper into uniform pleats 24, Fig. 5, bonding it e.g., by means of a layer 34 to a flat rectangular perforated sheet of cone material 26, bending the ends of the latter together and joining them e.g., by a lap strip 36, Fig. 3, thus causing the pleated paper into a cylinder, the end folds being bonded together at 38. The open ends of the pleats are bonded to plates 28, 30, Fig. 1, and the outer folds are surrounded by a perforated wrapper 32 cemented thereto. In use the element 16 so formed is held by a spring 18 and a bolt 14 within a bowl 10 having an inlet 20 and an outlet 22. |
