FILTER

摘要

PCT No. PCT/GB94/00058 Sec. 371 Date Sep. 12, 1995 Sec. 102(e) Date Sep. 12, 1995 PCT Filed Jan. 12, 1994 PCT Pub. No. WO94/15703 PCT Pub. Date Jul. 21, 1994A filter consisting of a filter tube of a porous polymeric material having tendency to collapse towards a predetermined flattened configuration and a porous support sleeve disposed around the filter tube, so as to support the filter tube against internal fluid pressure, while providing no more resistance to flow of fluid than the filter tube.