Axial flow filter element
A filter element ( 1 ), which is formed particularly of a flat element wrapped into a compact body and which along its outer circumference has at least one continuous main sealing ring ( 2 ) disposed adjacent an end face ( 4 ) on the intake side, is provided with an additional emergency sealing collar ( 3 ) which encloses the filter body and is disposed near the end face ( 5 ) on the outlet side.
1. A filter element located in a housing, the filter element comprising at least one flat element which is wrapped into a compact filter body, and through which fluid to be filtered can flow axially between an intake end face and an outlet end face, said filter element having at least one continuous main sealing ring disposed around its outer periphery adjacent the intake end face such that an annular gap formed between the outside of the filter element and the inside of the housing is closed by the main sealing ring, and said filter element further comprising an emergency sealing collar the filter applied onto and extending circumferentially around the outer periphery of the filter body in a position adjacent to the outlet end face such that said annular gap is also closed by the emergency sealing collar.
2. A filter element as claimed in claim 1 , wherein the emergency sealing collar is formed of a nonwoven filter web.
3. A filter element as claimed in claim 1 , wherein the emergency sealing collar is formed of a foam strip.
4. A filter element as claimed in claim 1 , wherein the wrapped flat element comprises at least one layer of smooth filter paper and one layer of corrugated or pleated filter paper, and wherein the layers are interconnected by beads of viscous adhesive which are applied alternately to the edge regions of the layers.