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US 12,161,974 B2Granted
Process for making a filtration and/or diffusion device
AssigneeGambro Lundia AB
InventorsFranz Baumeister, Christian Hirssig, Tobias Beyer
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a process for producing a filtration and/or diffusion device, e.g., a capillary dialyzer or an ultrafilter.
Claims12
A process for the production of a filtration and/or diffusion device comprising a bundle of hollow fiber membranes disposed within a tubular housing, the process comprising the steps of:
- sealing a first end of the bundle of hollow fiber membranes by dipping the first end of the bundle into a melt of thermoplastic resin and allowing the melt to solidify;
- sealing a first end of the tubular housing corresponding to the first end of the bundle by dipping the first end of the tubular housing into a melt of thermoplastic resin and allowing the melt to solidify;
- followed by a first potting step which involves the formation of end walls within the tubular housing by embedding the ends of the bundle in a potting resin;
- and a first subsequent step which involves re-opening the fibers by cutting off the ends of the potted bundle together with part of the solidified potting resin after the potting resin has set and the end walls have been formed;
- further comprising the steps of
- sealing a second end of the bundle of hollow fiber membranes by dipping the second end of the bundle into a melt of thermoplastic resin and allowing the melt to solidify;
- sealing a second end of the tubular housing corresponding to the second end of the bundle by dipping the second end of the tubular housing into a melt of thermoplastic resin and allowing the melt to solidify;
- followed by a second potting step comprising the formation of end walls within the tubular housing by embedding the ends of the bundle in a potting resin;
- and
- a second subsequent step which involves reopening the fibers by cutting off the ends of the potted bundle together with part of the solidified potting resin after the potting resin has set and the end walls have been formed,
- wherein the first and the second end of the bundle of hollow fiber membranes and the first and the second end of the tubular housing are sealed prior to the second potting step, and
- wherein the ends of the tubular housing each feature a potting collar, the potting collar being a separate tubular component part mounted on the respective end of the tubular housing;
- and wherein the mouth of the potting collar is dipped into the melt of thermoplastic resin and is scaled instead of the end of the tubular housing.
10 more elements
A process for the production of a filtration and/or diffusion device comprising a bundle of hollow fiber membranes disposed within a tubular housing, the process comprising the steps of:
- sealing a first end of the bundle of hollow fiber membranes by dipping the first end of the bundle into a melt of thermoplastic resin and allowing the melt to solidify;
- sealing a first end of the tubular housing corresponding to the first end of the bundle by dipping the first end of the tubular housing into a melt of thermoplastic resin and allowing the melt to solidify;
- followed by a first potting step which involves the formation of end walls within the tubular housing by embedding the ends of the bundle in a potting resin;
- and a first subsequent step which involves re-opening the fibers by cutting off the ends of the potted bundle together with part of the solidified potting resin after the potting resin has set and the end walls have been formed;
- further comprising the steps of
- sealing a second end of the bundle of hollow fiber membranes by dipping the second end of the bundle into a melt of thermoplastic resin and allowing the melt to solidify;
- sealing a second end of the tubular housing corresponding to the second end of the bundle by dipping the second end of the tubular housing into a melt of thermoplastic resin and allowing the melt to solidify;
- followed by a second potting step comprising the formation of end walls within the tubular housing by embedding the ends of the bundle in a potting resin;
- and
- a second subsequent step which involves reopening the fibers by cutting off the ends of the potted bundle together with part of the solidified potting resin after the potting resin has set and the end walls have been formed,
- wherein the first and the second end of the bundle of hollow fiber membranes and the first and the second end of the tubular housing are sealed prior to the second potting step, and
- wherein at each end of the tubular housing, a support ring is disposed within the tubular housing, the support ring being a separate annular component part mounted on a ledge inside the tubular housing, and featuring a tubular projection protruding from the mouth of the tubular housing at the corresponding end of the tubular housing, and
- wherein the mouth of the tubular projection is dipped into the melt of thermoplastic resin and is sealed instead of the end of the tubular housing.
10 more elements
Dependencies are inferred from the claim text.