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US 10,112,130 B2Granted
Self-supporting folded sheet material, filter elements, and methods
AssigneeDonaldson Company, Inc.
InventorsJacob C. Savstrom, Robin Glisson
Life of this patent
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Abstract
A pleated media pack includes a section of media configured into a tube defining an interior volume and an open opening at one end. A ratio of the pleat depth to a diameter of the opening is greater than 0.2. At least some of the pleats at one end of the media pack are inverted. In some examples, the pleats include major pleats alternating with minor pleats.
Claims12
A pleated media pack for use in a filter element;
- the media pack comprising:
- (a) a section of filtration media folded into pleats;
- at least some of the pleats having a major pleat depth;
- (b) the section of filtration media being configured into a tube defining an interior volume, first and second opposite ends;
- and an opening at the first end;
- the opening having an outer diameter;
- (c) a ratio of the pleat depth to the opening outer diameter being greater than 0.2;
- and
- (d) wherein at least some of the pleats at the first end are inverted an opposite direction of the rest of the pleat, along only a portion of the pleat length from the first end toward the second end, and each of the pleats at the second end have outer pleat tips extending fully to the second end and are not inverted.
6 more elements
Dependencies are inferred from the claim text.