| abstract |
A liquid filtering device (20) for separating leukocytes from blood to produce concentrated red cells, for example, includes a housing (22) having a liquid inlet port (32) and a liquid outlet port (40) and providing a flow passage from the liquid inlet port (32) to the liquid outlet port (40), a partition plate (26) fixedly disposed in the housing (22), a first filter element (42a, 42b) disposed in the housing (22) in an upstream position with respect to the flow passage, and a second filter element (44a, 44b) disposed in the housing (22) in a downstream position with respect to the flow passage, the second filter element (44a, 44b) being made of a material having a larger filtration resistance than the first filter element (42a, 42b). The second filter element (44a, 44b) has an outer peripheral edge fixed directly to the partition plate (26) in a liquidtight manner in surrounding relation to the first filter element (42a, 42b). |