| 摘要 |
<p>831,430. Filters. JAUME, R. Dec. 28, 1956 [Jan. 5, 1956], No. 39476/56. Class 46. [Also in Group V] A filter element consists of a filter "cloth" of natural or synthetic fibres or wire gauze spanning a hollow trough-shaped carrier made of metal, alloy or a plastic material. The element of Fig. 1 may be made by positioning a filter cloth 4, preferably of polyamide fibres, in a mould and then injecting into the mould a plastic material, preferably a polyamide resin, in a fluid condition, which on setting forms the trough-shaped carrier 1, 2, 3, united to the edges of the cloth 4. Slots 5, bordered by integrally-moulded lips 6, are provided in the lower side 3, and after closing the ends and coiling in the manner shown the element may be arranged in a casing 9, 10, 11, Fig. 4, having inlet apertures 12 in its spirally-grooved bottom wall 10, and recesses in the cover 9 for accommodating integrally-moulded studs 8 on the element. Instead of being coiled the element may have its ends joined together and be corrugated into star shape ; or it may be replaced by a plurality of concentric cylindrical elements. The side 2 may be apertured at 14, Fig. 8, and another element arranged above it. to provide parallel-flow filtration. Alternatively, the side 2 may be continued outward, downward and inward to meet the side 3 and thus to form a further wall 15, Fig. 10, the side 2 being in that case formed with apertures 16. Stacked elements C, D then provide series-flow filtration. The element may alternatively be formed by making two right-angled longitudinal folds in a planar assembly comprising a filter cloth moulded along one edge into a wide plastic strip (having a sealing lip formed along its free edge), and along the other edge into a narrow strip, (likewise having a sealing lip along its free edge). The finished element has the cross-section of Fig. 3. Where the element does not form a closed figure its ends are obturated either by an end wall moulded for the purpose, or by softening the ends of the carrier 1, 2, 3 by heating, and applying clamping pressure to embed the cloth therein. The carrier may be formed by alternative moulding or casting techniques (see Group V).</p> |
