Article: Japanese Inventors Develop Air Filter Element

ALEXANDRIA, Va., Aug. 7 -- Naoji Hasegawa, Isamu Kawawa and Takayoshi Kuboyama, all from Kawasaki, Japan, have developed an air filter element and a method of producing the same.

According to the U.S. Patent & Trademark Office: "There is provided an air filter element which is used by fitting a central opening in its end plate on a cylindrical portion projecting into a casing, wherein the air filter element has a novel seal construction (end plate). An end plate closing the end surface of a hollow cylindrical filter portion includes a soft inner peripheral seal portion capable of sticking to the outer surface of a cylindrical member and a rigid closure portion which is disposed on the ...

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