Strip-like filter material for filter body comprises starting material folded in zigzag manner with molded beads formed on both sides of filter material

摘要

A strip-like filter material comprises a starting material folded in a zigzag manner with molded beads (2) formed on both sides of the filter material. The beads run vertically to the folding lines (1) of the folded filter material in double rows (3) spaced from each other. Each double row comprises longitudinal beads running in an opposite direction to each other. The beads of the double rows are arranged from row to row in the direction of the folding lines displaced from each other.