Patent ID: 6524411
Filing Date: 2003-02-25
Classification: B01D

Abstract:
A method for producing a pleated filter element for co-action with a filter housing having a sealing edge portion adapted for co-action with said pleated filter element, said method comprising the steps:a) selecting a first and second end-cap having a hardness in the range of about 50 to about 75 durometer Shore A, each of said end-caps having an inner diameter flange and an outer diameter flange with an annular space defined there-between, and each of said end-caps being dimensioned so as to permit sealing co-act along the outer surface of the outer diameter flange with said filter housing, said end-caps comprising a material selected from the group consisting of: ethylene-propylene diene monomer and nitrile rubber. b) selecting a pleated filter element having a top surface and a bottom surface, said pleated filter element fabricated from thin sheet material comprising glass paper having a thickness of about 0.005 to about 0.030 inches and dimensioned such that the top surface within the annular space of said first end-cap and said bottom surface of the pleated filter element fits within either said annular space of said second end-cap; c) filling a portion of said annular spaces of said first and second end-cap to a substantially uniform depth with a solid-setting liquid polymeric adhesive material which has a viscosity of about 1 cP to about 5Ã—104 cP in its non-set liquid state, said liquid polymeric adhesive comprising a thermoset adhesive; d) inserting said top surface of said pleated filter element into said filled annular space of said first end-cap and said bottom surface of said filter element into the filled annular space of said second end-cap while said solid-setting liquid polymeric adhesive material is in its non-set state; and comprising a thermoset adhesive; e) allowing said solid-setting liquid polymeric adhesive material to set.