Abstract: A method for manufacturing a filter (1) for gas masks includes providing a flat paper and folding the paper into a pleated preform. The filter element (2) is separated from the pleated preform (6) and is inserted into a housing (3). The inserted filter element (2) is connected to the housing (3) at least at some points. This filter elements (2) may have a polygonal outer contour, upon separating the element from the pleated filter preform (6). A foam and/or an adhesive is applied to an outer edge of the filter element (2), arranged on the circumference of the filter element, for an at least partial sealing of an edge (5). This establishes a connection to the housing (3) in at least some sections.

Abstract: A connection unit establishes a fluid connection between a patient and a ventilator. The connection unit includes a patient-side connection piece, a device-side connection piece, a port piece and a central piece, which provides a tube with a curved tube segment and is connected with a fluid-tight connection to the two connection pieces. The port piece includes a straight tube segment and a bent surface with a bent surface and with a passage opening. The port piece is inserted into a receiving opening of the central piece. The bent surface of the port piece forms a part of a wall of the curved tube segment. The straight tube segment of the port piece and the central piece provide a straight tube, which is interrupted by the passage opening. An additional device is insertable through the straight tube segment and through the passage opening into the provided tube.

Abstract: A connection unit (20) establishes a fluid connection between a patient (P) and a ventilator (30). The connection unit (20) includes a patient-side connection piece (2), a device-side connection piece (1), a port piece (3) and a central piece (8), which provides a tube with a curved tube segment and is connected with a fluid-tight connection to the two connection pieces (1, 2). The port piece (3) includes a straight tube segment and a bent surface (membrane) with a bent surface and with a passage opening. The port piece (3) is inserted into a receiving opening of the central piece (8). The bent surface of the port piece (3) forms a part of a wall of the curved tube segment. The straight tube segment of the port piece (3) and the central piece (8) provide a straight tube, which is interrupted by the passage opening. An additional device (40) is insertable through the straight tube segment and through the passage opening into the provided tube.

Abstract: A method for manufacturing a filter (1) for gas masks includes providing a flat paper and folding the paper into a pleated preform. The filter element (2) is separated from the pleated preform (6) and is inserted into a housing (3). The inserted filter element (2) is connected to the housing (3) at least at some points. This filter elements (2) may have a polygonal outer contour, upon separating the element from the pleated filter preform (6). A foam and/or an adhesive is applied to an outer edge of the filter element (2), arranged on the circumference of the filter element, for an at least partial sealing of an edge (5). This establishes a connection to the housing (3) in at least some sections.

Abstract: A method for manufacturing a filter (1) for gas masks includes providing a flat paper and folding the paper into a pleated preform. The filter element (2) is separated from the pleated preform (6) and is inserted into a housing (3). The inserted filter element (2) is connected to the housing (3) at least at some points. This filter elements (2) may have a polygonal outer contour, upon separating the element from the pleated filter preform (6). A foam and/or an adhesive is applied to an outer edge of the filter element (2), arranged on the circumference of the filter element, for an at least partial sealing of an edge (5). This establishes a connection to the housing (3) in at least some sections.

Abstract: A method for manufacturing a filter (1) for gas masks includes providing a flat paper and folding the paper into a pleated preform. The filter element (2) is separated from the pleated preform (6) and is inserted into a housing (3). The inserted filter element (2) is connected to the housing (3) at least at some points. This filter elements (2) may have a polygonal outer contour, upon separating the element from the pleated filter preform (6). A foam and/or an adhesive is applied to an outer edge of the filter element (2), arranged on the circumference of the filter element, for an at least partial sealing of an edge (5). This establishes a connection to the housing (3) in at least some sections.

Abstract: A sample preparation and testing system (10) includes a mixing container (1, 18). A display element (2, 40, 58, 60), functioning as a shaking indicator, is located in the interior of the mixing container (1, 18).