Patent ID: 11958008
Assignee: MANN+HUMMEL GMBH
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 7:
8. The method according to claim 2, wherein
before the step of axially compressing the filter medium, the method further comprises:
providing a lower casting mold part and an upper casting mold part;
placing the annular pleated filter medium body onto the lower casting mold part;

wherein the step of axially compressing the filter medium is practiced by:
moving the upper casting mold part from above onto the annular pleated filter medium body and moving the upper casting mold part towards the lower casting mold part;
wherein one of the casting mold parts is positioned inside the annular filter medium body and a different one of the casting mold parts is positioned outside of the filter medium body;
interacting the upper casting mold part with the lower casting mold part such that the compressed section is formed in the annular filter medium body adjacent to but spaced axially inwardly away from a respective one of the axial end faces by a distance of maximally 5 mm.