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US 6,312,489 B1Granted
Filter element for an air filter and a method for the production thereof
AssigneeFilterwerk Mann & Hummel GmbH
InventorsVolker Ernst, Arthur Klotz, Bruno Sommer
Life of this patent
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Abstract
A filter element for an air filter, including a filter insert (2; 8; 10) and a seal (6) extending around the outer edges of the filter insert on the flat side thereof; the filter insert being folded in a zig-zag or pleated form and being composed of filter paper or filter fabric. The filter element (1; 7; 9; 10) rests against parts of a filter housing through the seal (6). The folded filter insert has a contour on one side which deviates extensively from a plane, at least in certain predetermined areas, thus creating a continuous zig-zag fold.
Claims10
A filter element for an air filter comprising:
- a zigzag-shaped folded filter insert made of a web of filter material, the filter insert comprising a first folded region extending over a first area and a second folded region attached to the first folded region and extending over a second area;
- the first and second folded regions of the filter insert having a flat first face with a seal extending around outer edges of said flat face which is arranged to seal the first and second folded regions, said seal contacting parts of a filter housing when said filter insert is inserted therein;
- the first and second folded regions each comprising a different height over their respective first and second areas, each height being defined by continuous zigzag foldings of the filter material forming pleats, the different heights of the first and second folded regions defining a second face of the folded filter insert which exhibits a surface contour which deviates from a plane;
- wherein the pleats of the first folded region extend parallel to the pleats of the second folded region.
1 more element
Dependencies are inferred from the claim text.