Filter package with a flat holder material

摘要

The packet has a laminar substrate and a filtering medium that is arranged between two adjacent layers of the laminar substrate, where the filtering medium is a fleece material. A folding packet comprises channels that are formed by meander-shaped folding of a laminar material (11), and the filter medium is arranged in the foldings. The filtering medium is formed as a narrow band, where height of the band ranges from 1 mm to 20 mm, where the band exhibits alternately laterally arranged transverse slots.