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US 8,757,394 B2Granted
Filter element, filter device and method for producing a filter element
AssigneeMann+Hummel GmbH
InventorsMichael Maier, Martina Bachfischer
Life of this patent
Estimating the term…
Abstract
A filter element (1) has first and second end sections (3A, 3B) of a flat filter medium which are secured to one another. A sheathing (4) is provided, wherein said sheathing is compressed by the end sections (3A, 3B) and surrounds the end edges (9) of the end sections (3A, 3B). Alternatively, the filter element (1) has first and second end sections (3A, 3B) of a flat filter medium, wherein the first end section (3A) has a fold (5) having two fold legs (6A, 6B). The end section (3B) of the second end section (2B) is then compressed between the fold legs (6A, 6B).
Claims5
A filter element comprising:
- a flat filter medium sheet of a non-woven filter material having
- a first end section at a first edge of said sheet and having a terminal edge;
- a second end section at an opposing second end of said sheet and having a terminal edge;
- wherein said second end section overlays upon said first end section;
- a sheathing arranged on said end sections and enclosing over said terminal edges, said sheathing compressing said end sections together;
- wherein said end sections and said sheathing are made of the same non-woven filter material;
- wherein said sheathing is a flexible porous nonwoven filter material suitable for ultrasonic welding or laser welding;
- wherein said sheathing material is any of:
- a meltable material or a material with a meltable coating;
- wherein said sheathing is secured onto said end sections and terminal edges;
- wherein said sheathing and said end sections are secured together by ultrasonic welding or laser welding;
- wherein said sheathing includes
- a first fold leg;
- and
- and second fold leg;
- wherein said end sections are positioned between and compressed together by said two fold legs;
- wherein said fold legs and end sections are securely fastened together;
- wherein said flat filter medium sheet includes a plurality spaced folds forming a zigzag folded filter medium;
- wherein said end sections and said sheathing fold legs are moreover connected by gluing.
16 more elements
Dependencies are inferred from the claim text.