US5096591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirally, wound filter cartridge, apparatus system and method of manufacture and use
Assignee: Individual
•
Filing: 1990-09-11
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Granted: 1992-03-17
•
Expires: 2010-09-11
Abstract
Abstract A spirally wound ultrafiltration filter cartridge system and method which comprises a membrane sheet material forming a closed loop having a one end and an other end with first and second open spacer sheet materials, the membrane sheet material and spacer sheet material wrapped about a perforated center tube, the membrane sheet material sealed at either end by solid resin headers, the filter cartridge forming spirally wound permeate and concentrate flow channels and having a tangential, elongated feed inlet on the exterior surface of the filter cartridge. A concentrate stream is removed from the center tube and a permeate stream is removed from the one end of the closed loop of the membrane sheet material. The method of manufacture comprises spirally winding the closed end loop sheet material and the spacer sheet material about a perforated center tube and sealing either end of the membrane sheet material with a ptting resin.
Inventors
- 👤 James A. Benn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:53
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/22; B01D25/24; B01D63/00; B01D63/10; B01D63/101
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
289 words
A filter cartridge for the separation of a feed stream into a permeate stream and a concentrate stream, the filter cartridge adapted to be inserted within a filter container and which filter cartridge comprises: a) a perforated center tube for the withdrawal of a concentrate stream; b) a spirally-wound membrane sheet material selected for the separation of the feed stream into a concentrate stream and a permeate stream, the membrane sheet material forming a closed loop at the one and other end of the membrane sheet material and wrapped spirally around the center tube; c) a first and second porous, open spacer sheet material to separate the membrane sheet material, the first spacer sheet material within the closed loop of the membrane sheet material to form a spirally-wound permeate flow channel, and the second spacer sheet material outside of the closed loop membrane sheet material to form a spirally-wound concentrate flow channel having a tangentially, elongated feed inlet on the exterior cylindrical surface of the filter cartridge extending generally vertically the length of the filter cartridge for the tangential introduction of a feed stream into the concentrate flow channel; d) first and second headers at the one and the other end of the spirally-wound ultrafiltration material to seal the peripheral edges of said membrane sheet materials; e) a concentrate outlet means at one end of the center tube and extending through the first or second or both headers for the withdrawal of a concentrate stream from the center tube; and f) a permeate outlet means within the closed loop at the one end of the membrane sheet material and extending through the first or second header or both for the withdrawal of a permeate stream from the filter cartridge.
Claim 2
Dependent Claim
289 words
A filter cartridge for the separation of a feed stream into a permeate stream and a concentrate stream, the filter cartridge adapted to be inserted within a filter container and which filter cartridge comprises: a) a perforated center tube for the withdrawal of a concentrate stream; b) a spirally-wound membrane sheet material selected for the separation of the feed stream into a concentrate stream and a permeate stream, the membrane sheet material forming a closed loop at the one and other end of the membrane sheet material and wrapped spirally around the center tube; c) a first and second porous, open spacer sheet material to separate the membrane sheet material, the first spacer sheet material within the closed loop of the membrane sheet material to form a spirally-wound permeate flow channel, and the second spacer sheet material outside of the closed loop membrane sheet material to form a spirally-wound concentrate flow channel having a tangentially, elongated feed inlet on the exterior cylindrical surface of the filter cartridge extending generally vertically the length of the filter cartridge for the tangential introduction of a feed stream into the concentrate flow channel; d) first and second headers at the one and the other end of the spirally-wound ultrafiltration material to seal the peripheral edges of said membrane sheet materials; e) a concentrate outlet means at one end of the center tube and extending through the first or second or both headers for the withdrawal of a concentrate stream from the center tube; and f) a permeate outlet means within the closed loop at the one end of the membrane sheet material and extending through the first or second header or both for the withdrawal of a permeate stream from the filter cartridge.
Claim 3
Dependent Claim
27 words
The filter cartridge of claim 1 wherein the membrane sheet material comprises an ultrafiltration membrane sheet material having a pore size of about 0.5 microns or less.
Claim 4
Dependent Claim
17 words
The filter cartridge of claim 1 wherein the membrane sheet material comprises a porous nylon sheet material.
Claim 5
Dependent Claim
19 words
The filter cartridge of claim 1 wherein the spacer sheet material comprises a plastic, open, porous, resilient screen-type material.
Claim 6
Dependent Claim
26 words
The filter cartridge of claim 1 wherein the permeate flow and the concentrate flow channels have a thickness of about from 5 mils to 30 mils.
Claim 7
Dependent Claim
37 words
A filter apparatus which includes a container for the filter cartridge of claim 1 and the container includes a header at one end having a screw on-type fitting for sealingly attaching the container to a filter holder.
Claim 8
Dependent Claim
42 words
The filter cartridge of claim 1 wherein the porous spacer sheet material extends about the entire cylindrical exterior surface of the filter cartridge so that the filter cartridge is adapted to be placed in a snug, fitting position within a filter container.
Claim 9
Dependent Claim
52 words
The filter cartridge of claim 1 wherein the membrane sheet material comprises on one side an ultrafiltration filter sheet material and the other side a non-porous sheet material, the sheet material connected at the one and other ends to form the closed loop sheet material for spirally winding about the center tube.
Claim 10
Dependent Claim
14 words
The filter cartridge of claim 1 wherein the headers are solid potted resin headers.
Claim 11
Dependent Claim
45 words
The filter cartridge of claim 1 wherein the permeate outlet means comprises a permeate outlet tube extending a short distance into the permeate flow channel and generally adjacent the center tube and at the one end of the closed loop of the membrane sheet material.
Claim 12
Independent Claim
219 words
A method of manufacturing a spirally-wound filter cartridge, which method comprises: a) forming a closed loop of a membrane sheet material so as to form a loop at the one end and the other end; b) inserting a first porous spacer separating sheet material within the closed loop of the membrane sheet material to form a permeate flow channel; c) placing a second porous spacer sheet material adjacent the one side of the membrane sheet material to form a concentrate flow channel; d) placing a permeate outlet tube within the loop of the membrane sheet material at the one end; and e) rolling the membrane sheet material with the outlet tube and containing therein the first spacer sheet material and the second spacer material about a perforated center tube to form spirally-wound concentrate and permeate flow channels and to form an elongated, tangential feed inlet at the other end of the loop of the membrane sheet material on the exterior surface of the filter cartridge; and f) forming potting resin end seals at each end of the spirally wound sheet material to seal the peripheral edges of the spirally-wound membrane sheet material while providing an open passageway for the center tube and the permeate outlet tube, thereby providing for a filter cartridge to be easily manufactured at low cost.
Claim 13
Independent Claim
219 words
A method of manufacturing a spirally-wound filter cartridge, which method comprises: a) forming a closed loop of a membrane sheet material so as to form a loop at the one end and the other end; b) inserting a first porous spacer separating sheet material within the closed loop of the membrane sheet material to form a permeate flow channel; c) placing a second porous spacer sheet material adjacent the one side of the membrane sheet material to form a concentrate flow channel; d) placing a permeate outlet tube within the loop of the membrane sheet material at the one end; and e) rolling the membrane sheet material with the outlet tube and containing therein the first spacer sheet material and the second spacer material about a perforated center tube to form spirally-wound concentrate and permeate flow channels and to form an elongated, tangential feed inlet at the other end of the loop of the membrane sheet material on the exterior surface of the filter cartridge; and f) forming potting resin end seals at each end of the spirally wound sheet material to seal the peripheral edges of the spirally-wound membrane sheet material while providing an open passageway for the center tube and the permeate outlet tube, thereby providing for a filter cartridge to be easily manufactured at low cost.
Claim 14
Dependent Claim
63 words
The method of claim 11 which includes providing additional second spacer sheet material extending out of the other end of the closed loop of the membrane sheet material and wrapping the additional spacer material about the exterior outer surface of the filter cartridge whereby the outer spacer material serves to provide for a snug fit of the filter cartridge within a filter container.
Claim 15
Dependent Claim
20 words
The method of claim 11 which includes inserting the filter cartridge within a cylindrical container to form a filter apparatus.
Claim 16
Dependent Claim
39 words
The method of claim 11 wherein the membrane sheet material has a thickness of about 1 mil to 10 mils and wherein the first and second spacer sheet material has a thickness of about 5 mils to 30 mils.
Claim 17
Dependent Claim
21 words
The method of claim 11 wherein the membrane sheet material has an average pore size of about 0.5 microns or less.
Claim 18
Dependent Claim
17 words
The method of claim 11 wherein the membrane sheet material comprises a porous nylon ultrafiltration sheet material.
Claim 19
Dependent Claim
32 words
The method of claim 11 wherein the membrane sheet material comprises a single sheet of ultrafiltration membrane sheet material sealingly closed at the one or other end to form a closed loop.
Claim 20
Dependent Claim
11 words
The spirally-would filter cartridge produced by the method of claim 11.
Claim 21
Dependent Claim
104 words
A method of separating a feed stream in a spirally-wound membrane filter cartridge into a concentrate stream and a permeate stream and which method comprises: a) introducing the feed stream tangentially into the open, elongated feed passage on the exterior outer surface of a spirally-wound filter cartridge of claim 1 so that the feed stream spirally winds radially inwardly within the filter cartridge toward a central loop at the end thereof adjacent the perforated center tube; b) withdrawing from the closed loop at the one end of the membrane sheet material a permeate stream; and c) withdrawing from the center tube a concentrate stream.
Claim 22
Dependent Claim
21 words
The method of claim 19 wherein the feed stream comprises a solvent-based waste effluent stream from a printing press ink blanket.
Claim 23
Dependent Claim
123 words
A filter apparatus which comprises: a) the filter cartridge of claim 1; b) a container for the filter cartridge having a one end and an other end, the container having at the one end a screw-on header sealingly secured to one end of the filter cartridge and having a central concentrate outlet to receive concentrate from the central concentrate outlet of the filter cartridge and having an inlet for the introduction of a feed stream into the container and into the feed inlet of the filter cartridge; and c) the container sealingly secured at the other end to the other end of the filter cartridge and having a central permeate outlet to receive permeate from the permeate outlet means of the filter cartridge.
Claim 24
Dependent Claim
93 words
A filter system which comprises: a) the filter apparatus of claim 21; and b) a filter holder head means to mount the filter apparatus which filter holder means comprises a screw-on thread means to receive the screw-on header of the container, and which filter holder means includes a concentrate outlet to receive the concentrate stream from the filter cartridge and a feed inlet to receive a feed stream for introduction into the feed inlet of the filter cartridge and means to seal the one end of the container to the filter holder means.
References Cited (Backward Citations)
US2185281A
Cited
US4299702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-17 | 1995-09-16 | 1996-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-17 | 1999-09-16 | 2000-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-17 | 2003-09-16 | 2004-03-17 | $7700.00 | Window Closed / Lapsed |