Patent ID: 7390443
Filing Date: 2008-06-24
Classification: B01D,Y10S

Abstract:
1. A method of manufacturing filter media comprising: selecting a first independent measured thickness weight of chopped fibers being of selected denier; collecting said first independent measured thickness weight of chopped fibers in a mixer-blender zone; selecting at least a second independent measured thickness weight of chopped fibers being of selected denier different from said denier of said first measured thickness weight of chopped fibers with said fibers of one independent thickness weight being finer than said fibers of said other independent thickness weight; collecting said at least a second independent measured thickness weight of chopped fibers in a mixer-blender zone to be successively joined in overlying face-to-face thicknesses relation with said first measured thickness weight of chopped fibers; passing said first and second measured thickness weights to a carding zone to open and align said chopped fibers in each said successively joined filter media thicknesses, having face-to-face relationship to maximize particulate dirt holding capacity and to increase efficiency, said face-to-face filter media thicknesses being defined by the formula: with the porosity “ε” is the ratio of the pore volume to the total volume of medium “Σ” is the summation from “i”=1 to n, and “M” is the mean flow pore diameter of the filter media layers, said porosity in such an arrangement comprising the ratio of pore volume to the total volume of filter media so that the overall average pore size of that of successive face-to-face thicknesses is smaller than that of the average overall pore size of the independent finest filter thicknesses; and, said selected fibers being of selected denier providing a subsequent pore size after being processed and bonded to provide said filter media with an equal share of terminal differential pressure on each of said independent thicknesses, maximizing holding capacity for a predefined fluid stream.