| 摘要 |
Known filter capsules are constructed of two annular discs of filter material which are assembled onto the outward surfaces of two respective support discs. The discs of filter material are secured onto the support disc by a swaged ring collar which clamps the discs of filter material and the support discs together forming a bi-laminate assembly. As a result of the support discs being cut from a sheet which is formed with a plurality of holes, the radially innermost face and radially outermost face of the respective support discs includes some sections of the surfaces which define some of the holes, and the respective support disc faces do not, therefore, have a smooth surface. The present invention provides an annular filter cell assembly (1) comprising a circular support disc (2) formed with a central aperture (4) defined by a smooth radially innermost surface (6), a circular filter element (8) and an annular ring (12), the arrangement being such that the filter element (8) is held between the support disc (2) and the annular ring (12) and the radially innermost surface (6) of the support disc (2) is bonded to the radially innermost surface of the annular ring (12) such that the filter cell assembly (1) defines a common axial through port (15). |
