Patent ID: 6743317
Filing Date: 2004-06-01
Classification: B01D,Y10T

Abstract:
A process for manufacturing a filter element comprising:providing filter media comprising a flat-sheet of filter material and a corrugated sheet of filter material, positioned one on top of the other where said flat sheet and said corrugated sheet are substantially of the same length and width and are bonded to each other by using a sealing composition in a pre-determined, relatively narrow area on or near opposing sides such that the sealing composition forms plugs on either side which define confined flutes between the corrugated sheet and the flat-sheet; assembling a predetermined length of said filter media such that a series of flutes which are plugged on both sides and a series of unplugged flutes are formed; vertically positioning said predetermined length of filter media so that the plugs on one side of said confined flutes face downward; providing a receptacle which contains an amount of sealant having a sufficient height for filling said unplugged flutes to a point higher than the downwardly facing plug for each of said confined flutes; inserting the lower end of said downward facing filter media into said receptacle to a sufficient depth so that the sealant fills a portion of each of said unplugged flutes to a point higher than the downwardly facing plug for each of said confined flutes; providing a sufficient time for said sealant to cure; cutting said filter media so that the cut is above the downwardly facing plug for each of said confined flutes but below the top surface of the cured sealant which filled a portion of each of said unplugged flutes thereby forming a filter element having a series of flutes which are plugged on only one side and a series of flutes plugged on only the opposite side.