Filter screen, tubular filter and filter device

Abstract

1 Abstract Abstract The invention relates to a filter screen (4) for a tubular filter (2) for filtering liquids, in particular polymer melts (24), wherein the tubular filter screen (4), which is bent from a flat screen blank (19), has a filter axis (3), a screen wall 5 (11) and, on the circumference of the screen wall (11), a perforation region (13) with densely packed, fine through openings (14) and a connecting means (17), which is aligned with an axial direction component, in particular in the form of a weld seam. The perforation region (13) has, at each of its two ends in the circumferential direction, a region edge (15) extending with an 10 axial direction component, the region edges (15) each ending at a distance in front of the connecting means (17) so as to form a spacer region (18), and at least one region edge (15) in its axial profile having a profile geometry (16) with varying edge distances (a1,a2) from the adjacent connecting means (17). The profile geometry (16), as viewed in the circumferential direction, 15 has a profile depth (t) which is a multiple of the diameters of the through openings (14). Figure 1 is the selected drawing. Abstract 10 20 26 20 05 66 28 J an 2 02 6 2 0 2 6 2 0 0 5 6 6 2 8 J a n 2 0 2 6 A b s t r a c t − 1 / 6 − Fig. 1 4 12 12 11 13,14 13,14 3 18 18 15 15 16 16 16' 16" 20 17 17' 11 3 16' 16 12 17 18 20 26 20 05 66 28 J an 2 02 6 J a n 2 0 2 6 4 1 1 2 0 2 6 2 0 0 5 6 6 2 8 1 7 1 8

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