Abstract: An air filter element for an air filter may include a first end plate and a second end plate spaced apart from each other in an axial direction and configured to bound the filter element in the axial direction. The first filter body may be arranged axially between the first and second end plates. A second filter body may be arranged axially between the first and second end plates. An intermediate plate may be arranged axially between the first and second filter bodies and have an intermediate plate area enclosed by an intermediate outer contour and a first end plate area enclosed by a first outer contour.

Abstract: A filter element having a longitudinal center axis for a fresh air system of an internal combustion engine may include a first plate filter body composed of a pleated filter material and a separate second plate filter body composed of a pleated filter material. The filter element may include first wall body and a second wall body, and a first end body and a second end body. The first wall body, the second wall body, the first end body and the second end body may be connected to the first plate body and the second plate filter body to define an inner space. At least one of the first plate filter body and the second plate filter body may include a curvature projecting to the interior space in a profile extending transversely to a longitudinal direction with respect to the longitudinal center axis.

Abstract: A filter element for at least one of a fresh air system and a ventilation and/or air-conditioning system of a motor vehicle may include a filter body including a folded filter material that laterally surrounds an internal space. A first end plate and a second end plate may be sealingly attached to the filter body at sides that are facing away from one another. A front plate may be arranged in a lateral region of the filter body. The front plate may include a first end plate joining region and a second end plate joining region facing the first end plate and the second end plate. The first and second end plate joining regions may be fused with a front-side end of the first and second end plates.

Abstract: A filter element for at least one of a fresh air system and a ventilation and/or air-conditioning system of a motor vehicle may include a filter body including a folded filter material that laterally surrounds an internal space. A first end plate and a second end plate may be sealingly attached to the filter body at sides that are facing away from one another. A front plate may be arranged in a lateral region of the filter body. The front plate may include a first end plate joining region and a second end plate joining region facing the first end plate and the second end plate. The first and second end plate joining regions may be fused with a front-side end of the first and second end plates.

Abstract: A filter element having a longitudinal center axis for a fresh air system of an internal combustion engine may include a first plate filter body composed of a pleated filter material and a separate second plate filter body composed of a pleated filter material. The filter element may include first wall body and a second wall body, and a first end body and a second end body. The first wall body, the second wall body, the first end body and the second end body may be connected to the first plate body and the second plate filter body to define an inner space. At least one of the first plate filter body and the second plate filter body may include a curvature projecting to the interior space in a profile extending transversely to a longitudinal direction with respect to the longitudinal center axis.

Abstract: A filter arrangement may include a housing having an untreated space inlet and a clean space outlet and a filter insert configured to attached to the clean space outlet in the housing and to separate a clean space in the interior of the filter insert from an untreated space outside the filter insert. A lining part may be arranged on the filter insert at the clean space, wherein the lining part is configured to form a collection space for dirt retained by the filter wall in the vicinity of the clean space outlet.

Abstract: A multi-layered filter web having at least one at least one filter layer bonded to at least one additional filter layer. The filter layers are bonded together by at least one of ultrasonically and matted. The bonding is in at least one of at least one knurled edge region and in at least one matting region.

Abstract: An air filter element for an air filter may include a first end plate and a second end plate spaced apart from each other in an axial direction and configured to bound the filter element in the axial direction. The first filter body may be arranged axially between the first and second end plates. A second filter body may be arranged axially between the first and second end plates. An intermediate plate may be arranged axially between the first and second filter bodies and have an intermediate plate area enclosed by an intermediate outer contour and a first end plate area enclosed by a first outer contour.

Abstract: A fuel filter may include a housing having a first annular filter element and a second annular filter element. The filter elements may be arranged coaxially and offset to each other in the axial direction and may be connected in series and therefore configured to allow flow to pass through each in succession. The annular filter elements may be selectively replaceable. Adapter elements may be connected to each other and to at least one of the annular filter elements by a respective plug-in connection. One of the adapter elements may have a continuation configured to close a no-load opening in the housing when the filter element is inserted.

Abstract: The invention relates to a gas filter insert (1), particularly an air filter insert for a fresh air system of an internal combustion engine, having a filter body (2) which extends in its longitudinal direction (4) in a U-shape around an inner chamber (5), and having a connector (3) which communicates with the inner chamber (5) and is arranged on the filter body on the open end-face side (7) thereof. In order to simplify the construction of the filter insert (1), the filter body (2) is sealed transversally to its longitudinal direction (4), with an end plate (9) on at least one end side (8).

Abstract: A filter arrangement may include a housing having an untreated space inlet and a clean space outlet and a filter insert configured to attached to the clean space outlet in the housing and to separate a clean space in the interior of the filter insert from an untreated space outside the filter insert. A lining part may be arranged on the filter insert at the clean space, wherein the lining part is configured to form a collection space for dirt retained by the filter wall in the vicinity of the clean space outlet.

Abstract: A multi-layered filter web having at least one at least one filter layer bonded to at least one additional filter layer. The filter layers are bonded together by at least one of ultrasonically and matted. The bonding is in at least one of at least one knurled edge region and in at least one matting region.

Abstract: A plate-shaped filter insert for, in particular, a gas filter with a seal which projects outward on a first of two opposite plate surfaces should be simple and inexpensive to produce with good durability. For this purpose, such a filter insert has the following features: —the filter material (1) is designed as a web material folded in a zigzag shape, each of whose folds on the top side are sealed by a first sealant strip (2), —the first sealant strips (2) each project bent outward at one of the two opposite upper plate sides formed by the backs of the folds, —at the end folds lying in longitudinal direction of the web material, a second sealant strip (3) running transverse to this longitudinal direction is attached, —the second sealant strips (3) are each bonded tightly to the first sealant strips (2), —a circumferential sealant material (4) is applied to the first and second sealant strips (2, 3) bonded tightly to one another.

Abstract: The invention relates to a gas filter insert (1), particularly an air filter insert for a fresh air system of an internal combustion engine, having a filter body (2) which extends in its longitudinal direction (4) in a U-shape around an inner chamber (5), and having a connector (3) which communicates with the inner chamber (5) and is arranged on the filter body on the open end-face side (7) thereof. In order to simplify the construction of the filter insert (1), the filter body (2) is sealed transversally to its longitudinal direction (4), with an end plate (9) on at least one end side (8).

Abstract: Disclosed is a filter element (3) comprising a cylindrical, porous, longitudinally penetrated filter material core (5) and a frame (6) that tightly surrounds one end of the core in a radial direction and is provided with scaling and holding means via which the filter element (3) can be removably and tightly inserted into a filter housing (1, 2).

Abstract: A plate-shaped filter insert for, in particular, a gas filter with a seal which projects outward on a first of two opposite plate surfaces should be simple and inexpensive to produce with good durability. For this purpose, such a filter insert has the following features: —the filter material (1) is designed as a web material folded in a zigzag shape, each of whose folds on the top side are sealed by a first sealant strip (2), —the first sealant strips (2) each project bent outward at one of the two opposite upper plate sides formed by the backs of the folds, —at the end folds lying in longitudinal direction of the web material, a second sealant strip (3) running transverse to this longitudinal direction is attached, —the second sealant strips (3) are each bonded tightly to the first sealant strips (2), —a circumferential sealant material (4) is applied to the first and second sealant strips (2, 3) bonded tightly to one another.

Abstract: Disclosed is a filter element (3) comprising a cylindrical, porous, longitudinally penetrated filter material core (5) and a frame (6) that tightly surrounds one end of the core in a radial direction and is provided with scaling and holding means via which the filter element (3) can be removably and tightly inserted into a filter housing (1, 2).

Abstract: The invention relates to a filter medium in the form of a wound filter with a number of adjacent tubular flow channels (5, 6) with a radial flow, which are formed from a double-layered filter web material of which one layer has a smooth embodiment and the other is corrugated. The aim of the invention is to provide the above with a simple and hence economically-produced seal, by means of which the above may repeatedly be exchangeably inserted in a filter device with a seal with little complexity. Alternatively and optionally additionally the end regions for sealing of the filter web material which forms the wound filter should permit a simplified and reliable sealing. The above is achieved by means of a material wherein felt is provided on the external circumference of the wound filter as sealing material for a radial seal within a housing.

Abstract: A method for sealing the cut edges which result when filter material is cut from a zigzag-shaped starting material is provided. The filter material area situated within an outer casing is at least partly interspersed with fine particles which are present therein in an unbound state. A cutter blade separates the filter material, which during the cutting process rests against an anvil, by exerting pressure which acts approximately perpendicularly on the material to be separated. According to the method, the severance cut takes place in an area which shortly prior to carrying out the severance cut has been impregnated with a liquid which is solidifiable under pressure.

Abstract: Proposed is a method for sealing the cut edges which result when filter material is cut from web shaped starting material, in which method