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US 2012/0234749 A1Published application
Filter Element, Filter Device and Method for Producing a Filter Element
AssigneeMann+Hummel GmbH
InventorsMichael MAIER, Klaus GEHWOLF
Life of this patent
Estimating the term…
Abstract
Filter element (1) has opposing end sections (3A, 3B) of a filter material sheet (2) that are connected to each other in a fluid-tight manner, wherein a molded or extruded plastic casing (5) encloses the end edges (4A, 4B) of the end sections (3A, 3B). A method for producing a corresponding filter element (1) includes the encasing of opposing end edges (4A, 4B) of end sections (3A, 3B) of a filter material sheet (2) with a plastic casing (5) so as to form a continuous bellows.
Claims16
A filter element comprising:
- a sheet of filter material having end sections (3A, 3B) at opposing ends of the sheet, said end opposing end sections (3A, 3B) each having a terminal edge (4A, 4B) of said filter material sheet, said terminal edges each having an overall length (L);
- wherein said end sections of said filter material sheet are overlaid against each other;
- molded or extruded elongated plastic casing (5) arranged on and covering at least a portion of said length of said terminal edges, securing said end sections and said terminal edges together;
- wherein said end sections are connected fluid-tightly with each other.
1 more element
A method for producing a filter element comprising:
- providing an injection molding tool having a cavity for molding a plastic casing;
- providing a sheet of filter material having end sections at opposing ends of the sheet, said opposing end sections each having a terminal edge, said terminal edges have an overall length;
- forming said sheet into a circumferentially closed endless bellows;
- arranging said terminal edges in said cavity said that said opposing end sections are overlaid;
- injection molding or extruding a plastic casing directly onto said terminal edges of said end sections of a filter material sheet, encloses said terminal edges across at least a portion of said overall length of said terminal edges, wherein said plastic casing secured said end sections are fluid-tightly together.
2 more elements
Dependencies are inferred from the claim text.