| 摘要 |
<p>A filter assembly is provided for filtering fluid polymeric material, and having a filter element composed of a sheet of filter material formed in a closed configuration defining therewithin the sides of a chamber open at each end; a first closure member having a sealing surface engaging in a fluid-tight seal one end of the filter sheet at such surface under compression by fluid polymeric material, and having at least one fluid passage therethrough in communication with the chamber; and a second closure member having a sealing surface engaging in a fluid-tight seal the other end of the filter sheet at such surface under compression by fluid polymeric material, and having a pressure-receiving surface upstream of the filter element responsive to relatively higher upstream differential pressure of fluid polymeric material to press the sealing surfaces of the first and second closure members into fluid-tight sealing relationship with the ends of the filter sheet so that the higher the differential pressure of fluid polymeric material across the filter element, the higher the pressure at the seal, and the tighter the seal.</p> |
