SELF-SEALING LIQUID FILTER

摘要

There is provided a liquid filter formed of a pleated filter material (10) or laminate where the pleat folds (13, 14) are closely adjacent such that they are separated by less than 6 mm. The downstream pleat tips (16) are supported by a rigid support structure (5) of an open porous lattic or the like. Between the downstream pleat tips (16) and the rigid support structure (5) is a self-sealing fibrous cover layer (20) having an effective mean flow pore size (MFPS) greater than the effective MFPS of the pleated filter material.