| 摘要 |
807,497. Gas filters. COOPERS MECHANICAL JOINTS Ltd., and STREETE, C. M. July 2, 1957, No. 20899/57. Addition to 789,180. Class 8(2). [Also in Group XXVII] In a combined silencer and gas filter, wherein the gas flows through ducts 4, 5 extending along the edges of a casing 1 and is directed laterally into the easing, the filter comprises a pleated annulus 16 of paper impregnated with phenol-formaldehyde, fabric or wire mesh disposed between cylindrical members 17, 18 of perforated sheet or gauze ; the ends of the filter assembly may be sealed by moulded rings 19, 20 of rubber or a plastic. The filter is located in the casing by a removable cover 3. |
