SELF-SUPPORTING FOLDED SHEET MATERIAL, FILTER ELEMENTS, AND METHODS

摘要

A pleated media pack includes a section of media configured into a tube defining an interior volume and an open opening at one end. At least some of the pleats at both ends of the media pack are inverted. In some examples, the pleats include major pleats alternating with minor pleats.

主权项

1. 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 a diameter; wherein at least some of the pleats at the first end are inverted an opposite direction of the rest of the pleat, along at least a portion of the pleat length from the first end toward the second end; and
at least some of the pleats at the second end are inverted an opposite direction of the rest of the pleat, along at least a portion of the pleat length from the second end toward the first end.