Patent ID: 6063152
Filing Date: 2000-05-16
Classification: B01D,H05K,Y10T

Abstract:
A combination air and EMI filter for a vented area having a surrounding surface, said combination air filter and EMI filter comprising: a portion of the surrounding surface defining a dimple, said dimple having a surface which is offset from the remainder of the surrounding surface and having a ventilating port provided therethrough, said ventilating port having a dimension which is sized to minimize the amount of EMI leakage from the vented area; and a non-woven material covering at least a portion of said dimple and covering said ventilating port, said non-woven material allowing the passage of gases through said ventilating port and substantially preventing the passage of liquid and particulate through at least a portion of said dimple and through said ventilating port, the surface area of said non-woven material which covers at least a portion of said dimple and covers said ventilating port defining a dimension which is different than said dimension of said ventilating port for maximizing the effective surface area of the filtration provided by said non-woven material.