| 摘要 |
962,167. Filters for liquids. TECHNICON INSTRUMENTS CORPORATION. Oct. 27, 1960 [Nov. 17, 1959], No. 36858/60. Heading B1D In a method of ultrafiltration, in which the filter comprises a semi-permeable membrane 20 of regenerated cellulose, of pore size about 5,000-10,000 Angstrom units, clamped between two grooved plates 22 which are fitted with nozzles 32 and form liquid passages, and a stream of liquid to be filtered is pumped to one of the passages simultaneously with a second stream of liquid to the other passage such that a proportion of the first stream is filtered into the second stream, the rate of filtration is controlled by the diameter of the outlet pipe 16 from the first passage, which is always less than that of the inlet pipe 14, the second stream leaving the plate 22 through outlet 46. Specifications 774,711 and 827,925 are referred to. |
