Filter element for fluid cleaner systems.

摘要

A filter element (50) having two-dimensional wave forms for filtering fluid, the filter element being formed of a trapezoidal, sectorial or triangular sheet by folding the sheet along a plurality of fold lines parallel to a base line of the sheet, the width of at least one fold section defined by two adjacent fold lines being different to that of the other fold sections, whereby the height of the crest or bottom of at least one of the waves formed by the folded sheet is different from that of the crest or bottom of the other waves.