Filter cartridge for filtering apparatuses

Claim 1

A filter cartridge for filtering apparatuses for removing impurities from hot and/or highly pressurized flowing gases, with zig-zag formed, gas-penetrated filter material folded at acute angles, whose part surfaces caused by the folding, between the fold lines, are arranged in relatively close juxtaposition to each other, characterized in that: one thin-walled strip 15 is disposed and arranged in the spaces between each two adjacent part surfaces 12, 13 of the filter material 11, said thin-walled strip 15 having one straight-formed edge 16 lying in the inside of the fold 14 and one opposite lying zig-zag formed edge 17, .Iadd.the zig-zag edge being straight lines to form sharp peaks, .Iaddend.and in that, relative to the medial plane 19 of said thin-walled strip 15, the bend or crest lines 18 rise steadily .Iadd.as straight bend lines .Iaddend.from said one straight formed edge 16 toward the sharp peaks of said zig-zag formed edge, .Iadd.whereby each said strip 15 engages the adjacent surfaces 12, 13 of the associated filter material fold solely by a line to surface engagement of each said straight bend line 18 with the surface of said associated filter material folds. .Iaddend.