Abstract: The invention relates to a method for manufacturing a hollow fiber membrane bundle from a plurality of polysulfone and PVP-based hollow fiber membranes which encompasses the providing of a spinning solution comprising a polysulfone-based material, in particular polysulfone, a vinylpyrrolidone-based polymer, in particular polyvinylpyrrolidone, an aprotic solvent, in particular dimethylacetamide, providing a coagulant liquid comprising water and an aprotic solvent, in particular dimethylacetamide, co-extruding the spinning solution and the coagulant liquid through a concentric annular spinneret into a hollow strand, whereby the cavity of the strand is filled with coagulant liquid, conducting the strand through a precipitation gap, introducing the strand into a precipitating bath comprised substantially of water so as to obtain a hollow fiber membrane, conducting the hollow fiber membranes through at least one rinsing bath and drying the hollow fiber membrane obtained, arranging the resulting hollow fiber membra

Abstract: The invention relates to a method for embossing a channel structure (3) comprising a plurality of parallel channel portions (5) in a planar metal sheet (11) to form a half-plate (2, 2?), in particular for a bipolar plate (1) of an electrochemical cell, said method having the following steps: providing the planar metal sheet (11) with a uniform initial wall thickness (d5), inserting the metal sheet (11) into a forming tool (12), wherein a base plane (BE) of the sheet (11) defined by the undeformed planar metal sheet (11) is provided to rest on a tool plane defined by a tool part (13) of the forming tool (12), forming the plurality of channel portions (5), each channel portion (5) being designed with two non-parallel flanks (7, 8) in such a way as to allow material from embossing portions (9, 10) of the metal sheet (11), which are located outside the flanks and remain in the base plane (BE) and/or a plane parallel thereto throughout the entire forming process, to be displaced into the flanks (7, 8), each fla

Abstract: A spinning nozzle is provided for the extrusion of a hollow fiber from one or more spinning masses. An apparatus that includes a spinning nozzle, and a method for extruding a hollow fiber using the spinning nozzle, are also provided. The spinning nozzle has an inlet port for each spinning mass to be extruded. The inlet port is for introducing the spinning mass into the spinning nozzle. An outlet port for the exit of a spinning mass along an outlet axis, is also provided. A spinning mass flow channel is used to guide the spinning mass from the inlet port to the outlet port. The spinning mass flow channel includes a flow manipulation section having an inlet and an outlet and includes a flow-guiding structure for influencing a spinning mass through the spinning mass flow channel.

Abstract: An electrode plate (1) for an electrolysis system (10), said electrode plate being made of sheet metal, in particular for producing hydrogen, has an active field (3) and a frame region (2) surrounding the active field, said frame region having a basic rectangular shape. The frame region (2) is formed on a base plane (E) of the undeformed sheet metal.

Abstract: An electrolysis plate, in particular for the electrolysis of water, including a rectangular profiled metal sheet which has two long sides and two narrow sides and which has an outer, frame-like connecting region and a profiled region which is located within said connecting region, has a rectangular, non-square basic shape and forms an active area. A flow channel having a longitudinal direction defined by the non-square shape of the profiled region and running parallel to the long sides is delimited by the surface of the profiled region. An embossed pattern of the profiled metal sheet is provided successively in the longitudinal direction of the profiled region at least three times, not overlapping or touching, i.e. spaced apart. Each embossed pattern is formed by at least three individual embossed patterns positioned adjacent to one another, extending in the longitudinal direction and describing a zigzag or undulating shape.

Abstract: The present invention relates to a method and to an apparatus for preparing a dialysis solution, wherein the apparatus has a first circuit and a second circuit, wherein the first circuit has a container for receiving the consumed dialysis solution or fresh water or another fluid, the primary side of a filter connected downstream of the container, and a return line from the primary side of the filter into the container, wherein the filter is configured to prepare purified water from the consumed dialysis solution or from fresh water or from another fluid, and wherein the second circuit has the secondary side of the filter, the dialyzate side of a dialyzer, a reservoir, a line that leads from the reservoir to the secondary side of the filter, by means of which dialyzate or a dialyzate concentrate can be supplied to the secondary side of the filter, and a filtrate line that leads away from the secondary side of the filter.

Abstract: The present invention relates to an apparatus and a method for preparing dialyzate, wherein the apparatus has a first part and a second part that is configured as a circuit; wherein the first part comprises a water connection or a water container as well as the primary side of a filter; wherein the filter is configured to prepare purified water from the water through forward osmosis; and wherein the second part comprises the secondary side of the filter, a reservoir, a filtrate line that leads from the secondary side of the filter to the reservoir, and a line leading from the reservoir to the secondary side of the filter, with the reservoir being a container having means for connecting the container to a dialysis machine.

Abstract: The invention relates to an undulated thermostable hollow fiber membrane of reduced wall thickness, wherein the wall thickness amounts to 20 ?m or greater and 30 ?m or less and the waveform of the hollow fiber membrane exhibits a wavelength in the range of from more than 1 mm and less than 5 mm. In particular, the invention relates to a method for producing an undulated thermostable hollow fiber membrane of lower wall thickness.

Abstract: The present invention relates to a device and to a method for producing dialysate, wherein the device comprises a first part and a second part designed as a circuit, wherein the first part comprises a water connection or a water container and the primary side of a filter, wherein the filter is designed to produce purified water from the water by forward osmosis, and wherein the second part comprises the secondary side of the filter, a reservoir, a filtrate line which leads from the secondary side of the filter to the reservoir, and a return line leading from the reservoir to the secondary side of the filter, wherein an electrodialysis unit comprising a diluate chamber and a concentrate chamber is further provided, wherein the concentrate chamber is fluidically connected to the secondary side of the filter.

Abstract: The invention relates to a method for manufacturing a hollow fiber membrane bundle from a plurality of polysulfone and PVP-based hollow fiber membranes which encompasses the providing of a spinning solution comprising a polysulfone-based material, in particular polysulfone, a vinylpyrrolidone-based polymer, in particular polyvinylpyrrolidone, an aprotic solvent, in particular dimethylacetamide, providing a coagulant liquid comprising water and an aprotic solvent, in particular dimethylacetamide, co-extruding the spinning solution and the coagulant liquid through a concentric annular spinneret into a hollow strand, whereby the cavity of the strand is filled with coagulant liquid, conducting the strand through a precipitation gap, introducing the strand into a precipitating bath comprised substantially of water so as to obtain a hollow fiber membrane, conducting the hollow fiber membranes through at least one rinsing bath and drying the hollow fiber membrane obtained, arranging the resulting hollow fiber membra

Abstract: The invention relates to a method for manufacturing a hollow fiber membrane bundle from a plurality of polysulfone and PVP-based hollow fiber membranes which encompasses the providing of a spinning solution comprising a polysulfone-based material, in particular polysulfone, a vinylpyrrolidone-based polymer, in particular polyvinylpyrrolidone, an aprotic solvent, in particular dimethylacetamide, providing a coagulant liquid comprising water and an aprotic solvent, in particular dimethylacetamide, co-extruding the spinning solution and the coagulant liquid through a concentric annular spinneret into a hollow strand, whereby the cavity of the strand is filled with coagulant liquid, conducting the strand through a precipitation gap, introducing the strand into a precipitating bath comprised substantially of water so as to obtain a hollow fiber membrane, conducting the hollow fiber membranes through at least one rinsing bath and drying the hollow fiber membrane obtained, arranging the resulting hollow fiber membra

Abstract: The invention relates to a method for manufacturing a dialysis filter comprising fluorine-containing hollow fiber membranes, the fluorine-containing hollow fiber membranes being made by a method comprising at least steps (A) to (C): (A) preparing a spinning solution comprising an aprotic solvent, a hydrophobic base polymer, a hydrophilic polymer, and a fluorine-comprising surface modifying macromolecule in a concentration less than 1.12% w/w; (B) extruding said spinning solution from an outer annular orifice through a tube-in-orifice spinneret into an aqueous solution, and (C) isolating the formed hollow fiber membrane, characterized in that the manufacturing of the dialysis filter comprises a steam sterilization procedure. The invention is further related to dialysis filter comprising a fluorine-containing hollow fiber membrane comprising a hydrophobic base polymer, a hydrophilic polymer and a fluorine-comprising surface modifying macromolecule in a concentration less than 3.

Abstract: The present invention relates to a method and to an apparatus for preparing a dialysis solution, wherein the apparatus has a first circuit and a second circuit, wherein the first circuit has a container for receiving the consumed dialysis solution or fresh water or another fluid, the primary side of a filter connected downstream of the container, and a return line from the primary side of the filter into the container, wherein the filter is configured to prepare purified water from the consumed dialysis solution or from fresh water or from another fluid, and wherein the second circuit has the secondary side of the filter, the dialyzate side of a dialyzer, a reservoir, a line that leads from the reservoir to the secondary side of the filter, by means of which dialyzate or a dialyzate concentrate can be supplied to the secondary side of the filter, and a filtrate line that leads away from the secondary side of the filter.

Abstract: The invention relates to a connection device for receiving and connecting filter modules, in particular tubular filter modules, having at least one lateral, in particular radial, connector wherein a connecting apparatus of the connection device connects the filter module at the lateral connector and fixes it in the connection device. Further connecting apparatus of the connection device serve in the connecting of connectors arranged coaxially on the filter module, wherein the coaxial connectors are not fixed via the further connecting apparatus.

Abstract: The invention relates to a spinning nozzle (10) for the extrusion of a hollow fiber from one or more spinning masses and an apparatus comprising a spinning nozzle (10) as well as method for extruding a hollow fiber by means of a spinning nozzle (10), wherein the spinning nozzle (10) has an inlet port (12, 13, 14) for each spinning mass to be extruded for introducing the spinning mass into the spinning nozzle (14), an outlet port for the exit of spinning mass along an outlet axis (A), and at least one spinning mass flow channel for guiding at least one spinning mass to be extruded from the inlet port (12, 13, 14) to the outlet port, wherein at least one spinning mass flow channel comprises a flow manipulation section having an inlet and an outlet, which comprises a flow-guiding structure (18, 19, 20) for influencing a spinning mass flowing through the spinning mass flow channel, wherein the flow-guiding structure (18, 19, 20) is thereby designed to influence spinning mass flow such that the spinning mass flowi

Abstract: The invention relates to an undulated thermostable hollow fiber membrane of reduced wall thickness, wherein the wall thickness amounts to 20 ?m or greater and 30 ?m or less and the waveform of the hollow fiber membrane exhibits a wavelength in the range of from more than 1 mm and less than 5 mm. In particular, the invention relates to a method for producing an undulated thermostable hollow fiber membrane of lower wall thickness.

Abstract: The invention relates to a method for manufacturing a hollow fiber membrane bundle from a plurality of polysulfone and PVP-based hollow fiber membranes which encompasses the providing of a spinning solution comprising a polysulfone-based material, in particular polysulfone, a vinylpyrrolidone-based polymer, in particular polyvinylpyrrolidone, an aprotic solvent, in particular dimethylacetamide, providing a coagulant liquid comprising water and an aprotic solvent, in particular dimethylacetamide, co-extruding the spinning solution and the coagulant liquid through a concentric annular spinneret into a hollow strand, whereby the cavity of the strand is filled with coagulant liquid, conducting the strand through a precipitation gap, introducing the strand into a precipitating bath comprised substantially of water so as to obtain a hollow fiber membrane, conducting the hollow fiber membranes through at least one rinsing bath and drying the hollow fiber membrane obtained, arranging the resulting hollow fiber membra

Abstract: Rings for a rolling bearing are disclosed, wherein the rings define a primary axis (A). The ring may include a ring formed as a hollow ring having a hollow chamber encircling the primary axis (A). A wall of the hollow ring may be of one-piece and/or seamless design in an axial section along the primary axis (A). The ring may be a bearing ring configured for rolling contact with rolling elements. In one example, the wall includes a raceway section in the wall for rolling contact with the rolling elements, a bearing bottom section for supporting the ring, two lateral supporting wall sections, and two connecting sections for connecting the two lateral supporting wall sections to the raceway section.

Abstract: Rings for a rolling bearing are disclosed, wherein the rings define a primary axis (A). The ring may include a ring formed as a hollow ring having a hollow chamber encircling the primary axis (A). A wall of the hollow ring may be of one-piece and/or seamless design in an axial section along the primary axis (A). The ring may be a bearing ring configured for rolling contact with rolling elements. In one example, the wall includes a raceway section in the wall for rolling contact with the rolling elements, a bearing bottom section for supporting the ring, two lateral supporting wall sections, and two connecting sections for connecting the two lateral supporting wall sections to the raceway section.

Abstract: It is described a point-of-use (POU) water purifier (10), comprising a housing (11) the inner space of which is divided by a bundle (16) of hollow fibers into an inlet compartment (14) in fluid communication with an opening (12) for connection of the purifier to the waterworks, and an outlet compartment (15) in fluid communication with the outlet (13) of purified water; the hollow fibers have an inner diameter between 150 and 250 ???? and a wall thickness between 30 and 50 ????, and have pores of different size and shape on the inner and outer surface of the fiber.