The invention relates to a filter element, comprising a filter medium (10) having a concentric shape and pleated in a zig-zag shape, a first open or closed end disk (11) arranged on a face and a second end disk (12) arranged on the opposing face. The end disk (12) comprises a concentric opening (13) and extends in a substantially annular shape over the pleats of the filter medium. The end disk (12) further comprises a first ring bead (14) extending axially to the outside and a sealing groove (16). The ring bead (14) comprises outer faces (18, 19), which are supported on radially extending ribs (20, 21) of a housing receiving the filter element or on a flat surface having channels.

Filter element and filter system

A membrane cartridge is manufactured by repeatedly folding and joining two strips of membrane to form a cross-pleated cartridge with a stack of openings or fluid passageways configured in an alternating cross-flow arrangement. The cartridge can be modified for other flow configurations including co-flow and counter-flow arrangements. Methods for manufacturing such cross-pleated membrane cartridges, as well as apparatus used in the manufacturing process are described. Cross-pleated membrane cartridges comprising water-permeable membranes can be used in a variety of applications, including in heat and water vapor exchangers. In particular they can be incorporated into energy recovery ventilators (ERVs) for exchanging heat and water vapor between air streams being directed into and out of buildings.

Cross-pleated membrane cartridges, and method and apparatus for making cross-pleated membrane cartridges

The invention provides a filter pack of which the mass is not increased, and moreover, the effective filter medium area is not reduced, and of which the pressure drop is sufficiently low, and the strength is sufficiently high, and an air filter using this. A pleated air filter pack is configured in such a way that dot embossed projections are provided on front and rear surfaces of a filter medium made of a non-woven fabric, the filter medium is folded in zigzag shape along creases of pleats, and the opposing embossed projections are brought into contact with each other when the filter medium is folded, thus maintaining the intervals between the filter media.

Pleated air filter pack and air filter using same

A filter (1) for filtering air, in particular an air filtering element (30), is provided for releasably fitting into a housing (10) which has a housing upper part (11) and in particular a central tube (20) fastened to the housing upper part (11), and also the housing for the filtering element (30) is provided. The filtering element has a seal (33, 34) for holding the filtering element (1) on the housing upper part (11) and the central tube (20) and for sealing the space (111) between the filtering element (30) and housing upper part (11) when the filtering element (30) is releasably fitted in the housing (10). The seal (33, 34) is connectable in a form-fitting manner to a sealing receptacle (111) of the housing upper part (11) and/or of the central tube (20).

Air filter system, air filter element and method for exchanging an air filter element

Disclosed are an air filter element, a filter housing, and an air filter in which the air filter elements have a high filtering capacity and a long service life by increasing the filter surface of an air filter element taking into account structural requirements for the air filter housing.

Air filter element and air filter

The invention relates to a filter for filtering fluids, in particular gases, more particularly intake air, fuel, urea solution or engine oil, particularly of an internal combustion engine, particularly of a motor vehicle, or ambient air for introduction into ventilation systems of buildings or vehicles, comprising a filter element (1) made of a filter medium (106) pleated in a zigzag manner, with a raw side (105) and a clean side (104). On the raw side (105), a plurality of elongated depressions (656) are formed in the filter medium (14; 106), which extend between raw-side pleat tips (102a) and raw-side pleat bases (103a) approximately perpendicular to pleat edges (F) of the filter medium (106) and implement corresponding elevations (658) on the clean side (104) such that, in a raw-side pleat intermediate space (148a), in each case, two depressions (656) on the two medium sections (120) delimiting the pleat intermediate space (148a) are located directly opposite of each other and each form a flow channel (660).

Filter for filtering fluids

Es wird ein Filterelement zur Entfernung von Partikeln aus einem Fluidstrom, insbesondere von Partikeln aus einem Kraftstoffstrom einer Brennkraftmaschine, vorgestellt, bei dem in Durchstromungsrichtung eine Vorfilterlage und eine Feinfilterlage aneinandergefugt sind und wobei auf der Rohseite der Vorfilterlage eine erste Stutzlage und auf der Reinseite der Feinfilterlage eine zweite Stutzlage zur Aufnahme der Langs- bzw. Querkrafte bei Zugbeanspruchung aufgebracht ist. Die beiden Stutzlagen weisen jeweils unterschiedliche durchschnittliche maximale Zugkrafte in Langs- bzw. Querrichtung auf.

Filtermedium und filterelement

The invention relates to a filter for filtering fluids, in particular gases, more particularly intake air, fuel, urea solution or engine oil, particularly of an internal combustion engine, particularly of a motor vehicle, or ambient air for introduction into ventilation systems of buildings or vehicles, and to a method for producing the same, comprising a filter element (1) having a filter medium (106) pleated in a zigzag manner, with a raw side (105) and a clean side (104). Filter medium sections (120), which extend on either side of the raw-side pleat tips (102a) to adjoining raw-side pleat bases (103a), comprise a first bend (552) toward the raw side (105), and behind that a second bend (554) toward the clean side (104), in each case viewed from the raw-side pleat tips (102a).

Filter for filtering fluids and method for producing the same

A filter medium for removing particles from a fluid flow has a pre-filter layer and a fine-filter layer joined to each other in the flow direction. A first supporting layer is attached to the unfiltered side of the pre-filter layer and a second supporting layer is attached to the filtered side of the fine-filter layer in order to absorb the longitudinal and transverse forces in the event of tensile loading. The traverse force absorbing layer has a greater bending stiffness in a traverse direction while the longitudinal force absorbing layer has a greater bending stiffness in a longitudinal direction.

Filter medium and filter element

The invention relates to a hotmelt adhesive comprising a hotmelt adhesive mixture, the mixture comprising a. 15-85% by weight of a first, polyester-based hotmelt adhesive, b. 15-85% by weight of a second, polyamide-based hotmelt adhesive.

Hotmelt adhesive and process for preparing a hotmelt adhesive

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