Liquid purification or separation – Casing divided by membrane into sections having inlet – Each section having inlet
Patent
1994-10-07
1995-07-04
Dawson, Robert A.
Liquid purification or separation
Casing divided by membrane into sections having inlet
Each section having inlet
21032184, 210484, 210489, 210495, B01D 6150
Patent
active
054297427
ABSTRACT:
A filter unit comprises a plastics frame into which a sheet of filter medium is insert moulded. Portions of the frame form apertures and other portions allow fluid access to and from the opposed surfaces of the filter medium when the frame is covered by a flat surface. The frames also form portions of an integral capsule enclosing the medium. A number of such filter units can be stacked together in various configurations so that the apertures form inlets and outlets for fluid so that, in some configurations, fluid can be passed through the filter units in parallel while, in other configurations, fluid can be passed through filter units in succession. Filters of any convenient size can be produced by increasing the number of filter units in a stack. The filters are bi-directional. The frames can be of polypropylene connected to hydrophilic microporous nylon membrane by injection moulding, which has been found to give a filter unit that can be integrity tested.
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Buttery Roger A.
Gutman Richard G.
Tolcher John A. G.
Dawson Robert A.
Pall Corporation
Walker W. L.
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