Patent ID: 9630136
Date: 2017-04-25
CPC Classifications: B01D

Claim:
1. An air filter comprising: a bellows made of an air-permeable filter medium, which is folded in a longitudinal direction to form a plurality of folds, for filtering air, and a supporting frame for supporting the bellows, wherein the supporting frame is a substantially closed comb-like ring having a plurality of supporting teeth, at least two supporting teeth adjacent in the longitudinal direction fixing at least two folds of the bellows adjacent in the longitudinal direction a predefined distance from each other, and wherein the comb-like ring includes two fold blades and two outer bands connecting the fold blades, the two fold blades being inserted in a transverse direction running transversely to the longitudinal direction into respective end folds of the bellows, and the two outer bands having the supporting teeth, including high supporting teeth and low supporting teeth, where the high supporting teeth are taller than the low supporting teeth.