Self-sealing liquid filter

摘要

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