| 摘要 |
<p>PCT No. PCT/EP98/00638 Sec. 371 Date Oct. 19, 1999 Sec. 102(e) Date Oct. 19, 1999 PCT Filed Feb. 6, 1998 PCT Pub. No. WO98/36817 PCT Pub. Date Aug. 27, 1998A combination disc and sealing ring for a filter assembly is provided. The disc is an annular thermoplastic disc having a central aperture. The disc includes an upper side and a lower side and the upper side of the disc includes an annular thickened area that extends upward from the upper side of the disc and that is spaced radially outward from the aperture of the disc. The annular thickened area is thermally welded to a sealing ring. The height of the annular thickened area is at least one-third the height of the sealing ring. The sealing ring further includes a central aperture that has a common axis with the central aperture of the disc. The sealing ring also includes a compressible area radially disposed between the aperture of the sealing ring and the annular thickened area of the disc.</p> |
