Patent ID: 6056809
Filing Date: 2000-05-02
Classification: B01D,Y10S

Abstract:
A washable air filter for filtering inlet air to a heating and/or air conditioning system comprising an assembly formed of:a deformable, non-electrostatic pad of a high-loft, air laid, resin bonded polymeric fibers having a high filtering efficiency for 10 micron and less particles and having a thickness from 0.05 to 0.45 inches and a density from 0.5 to 5 ounces per yard, said pad having a front surface and a rear surface;a layer of woven, porous, passive electrostatic fabric disposed on either side of the pad having an inside surface in contact with said surfaces, and having an outside surface;a deformable metal grill disposed in contact with the outside surfaces of the fabric; andsaid assembly having a pleated configuration in which the angle between adjacent wall surfaces of the pleats is from 20.degree. to 75.degree..