Filter and Filter Cartridge

A filter cartridge for a filter for filtering a fluid, the filter cartridge, comprising:

• a filter body of a zig-zag folded filter medium, forming a filter bellows, having:
• an inflow surface on a first axial side of the filter body;
• an outflow surface on a second axial side of the filter body;
• and
• a main flow direction extending axially from the inflow surface to the outflow surface;
• wherein folds of the zig-zag folded filter medium have:
• inflow folding edges arranged on the inflow surface;
• outflow folding edges arranged on the outflow surface;
• wherein each fold has a fold height defined as a distance from the inflow folding edge to the outflow folding edge;
• and
• wherein the fold height of the zig-zag folded filter medium is not constant but changes across a length of the zig-zag folded filter medium;
• and
• a filter cartridge frame supporting the filter body, the filter cartridge frame circumferentially closing around and covering radially outer sides of the zig-zag folded filter medium at least a portion of a distance between the inflow surface and the outflow surface;
• wherein the filter cartridge frame includes:
• a circumferential seal disposed on the filter cartridge frame at or adjacent to the outflow surface and configured to separate a filter interior of a filter into a clean side and a raw side;
• an edge protection ring arranged at or adjacent to the inflow surface, the edge protection ring circumferentially surrounding the inflow surface and the filter cartridge frame,
• wherein the edge protection ring projects outwardly away from the filter body and beyond the inflow surface, such that, when tapping the filter cartridge, the resulting forces can be at least partially absorbed by the edge protection ring, avoiding damage of the filter cartridge.