Patent US4045851A successfully refreshed from Google Patents.
US4045851A
Expired / Lapsed
US
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Method of fabrication of hollow filament separatory module
Assignee: Albany International Corp
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Filing: 1974-09-20
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Granted: 1977-09-06
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Expires: 1994-09-20
Abstract
Abstract A method of making a module for use in processes such as reverse osmosis, ultrafiltration, dialysis, and the like in which hollow filaments to be utilized as semi-permeable membranes comprise a coreless annular array of helically wound filaments.
Inventors
- 👤 Edward Ashare
- 👤 Richard N. Rulison
- 👤 Lawrence T. Wright
- 👤 Myron J. Coplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:55
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/02; B01D63/021; B01D63/0231; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
The method of producing a hollow filament separatory module including the steps of winding a plurality of layers of semi-permeable hollow filaments on a removable cylindrical support to create an annulus of filaments, each of said layers being helically wound at an angle to the axis of the winding support with adjacent layers wound in opposite hand, removing the cylindrical support, extending the annular filament array parallel to the axial direction by application of force to substantially increase the length in the order of up to five times the original length while decreasing the diameter of the annulus and decreasing the helix angle imparted to the wound filaments during the winding by a similar multiple, opening ends of filaments of the annulus and isolating said open ends from the main portions of the filaments, and providing a first means for allowing fluid to flow in contact with the outer surfaces of said filaments at the main portions thereof and providing a second means to allow fluid to flow within said hollow filaments and through the open ends thereof.
Claim 2
Independent Claim
178 words
The method of producing a hollow filament separatory module including the steps of winding a plurality of layers of semi-permeable hollow filaments on a removable cylindrical support to create an annulus of filaments, each of said layers being helically wound at an angle to the axis of the winding support with adjacent layers wound in opposite hand, removing the cylindrical support, extending the annular filament array parallel to the axial direction by application of force to substantially increase the length in the order of up to five times the original length while decreasing the diameter of the annulus and decreasing the helix angle imparted to the wound filaments during the winding by a similar multiple, opening ends of filaments of the annulus and isolating said open ends from the main portions of the filaments, and providing a first means for allowing fluid to flow in contact with the outer surfaces of said filaments at the main portions thereof and providing a second means to allow fluid to flow within said hollow filaments and through the open ends thereof.
Claim 3
Independent Claim
191 words
The method of producing a hollow filament separatory module including the steps of wrapping an extensible member around a removable cylindrical support, winding a plurality of layers of semi-permeable hollow filaments on said extensible member to create an annulus of filaments, each of said layers being helically wound at an angle to the axis of the winding support with adjacent layers would in opposite hand, removing the cylindrical support, extending the assembly of annular filament array and extensible member parallel to the axial direction by application of force to substantially increase the length in the order of up to five times the original length while decreasing the diameter of the annulus and decreasing the helix angle imparted to the wound filaments during the winding by a similar multiple, opening ends of filaments of the annulus and isolating said open ends from the main portions of the filaments, and providing a first means for allowing fluid to flow in contact with the outer surfaces of said filaments at the main portions thereof and providing a second means to allow fluid to flow within said hollow filaments and through the open ends thereof.
Claim 4
Independent Claim
191 words
The method of producing a hollow filament separatory module including the steps of wrapping an extensible member around a removable cylindrical support, winding a plurality of layers of semi-permeable hollow filaments on said extensible member to create an annulus of filaments, each of said layers being helically wound at an angle to the axis of the winding support with adjacent layers would in opposite hand, removing the cylindrical support, extending the assembly of annular filament array and extensible member parallel to the axial direction by application of force to substantially increase the length in the order of up to five times the original length while decreasing the diameter of the annulus and decreasing the helix angle imparted to the wound filaments during the winding by a similar multiple, opening ends of filaments of the annulus and isolating said open ends from the main portions of the filaments, and providing a first means for allowing fluid to flow in contact with the outer surfaces of said filaments at the main portions thereof and providing a second means to allow fluid to flow within said hollow filaments and through the open ends thereof.
Claim 5
Dependent Claim
24 words
The method of producing a hollow filament separatory module in accordance with claim 2 in which the extensible member is a macroporous sheet-like member.
Claim 6
Dependent Claim
22 words
The method of producing a hollow filament separatory module in accordance with claim 2 in which the extensible member is sheet-like elastic.
Claim 7
Independent Claim
207 words
The method of producing a hollow filament separatory module including the steps of wrapping a first extensible sheet-like member around a removable cylindrical support, winding a plurality of layers of semi-permeable hollow filaments on said extensible member to create an annulus of filaments, each of said layers being helically wound at an angle to the axis of the winding support with adjacent layers wound in opposite hand, wrapping a second extensible sheet-like member over said annulus of filaments, removing the cylindrical support, extending the assembly of annular filament array and first and second extensible members parallel to the axial direction by application of force to substantially increase the length in the order of up to five times the original length while decreasing the diameter of the annulus and decreasing the helix angle imparted to the wound filaments during the winding by a similar multiple, opening ends of filaments of the annulus and isolating said open ends from the main portions of the filaments, and providing a first means for allowing fluid to flow in contact with the outer surfaces of said filaments at the main portions thereof and providing a second means to allow fluid to flow within said hollow filaments and through the open ends thereof.
Claim 8
Independent Claim
207 words
The method of producing a hollow filament separatory module including the steps of wrapping a first extensible sheet-like member around a removable cylindrical support, winding a plurality of layers of semi-permeable hollow filaments on said extensible member to create an annulus of filaments, each of said layers being helically wound at an angle to the axis of the winding support with adjacent layers wound in opposite hand, wrapping a second extensible sheet-like member over said annulus of filaments, removing the cylindrical support, extending the assembly of annular filament array and first and second extensible members parallel to the axial direction by application of force to substantially increase the length in the order of up to five times the original length while decreasing the diameter of the annulus and decreasing the helix angle imparted to the wound filaments during the winding by a similar multiple, opening ends of filaments of the annulus and isolating said open ends from the main portions of the filaments, and providing a first means for allowing fluid to flow in contact with the outer surfaces of said filaments at the main portions thereof and providing a second means to allow fluid to flow within said hollow filaments and through the open ends thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |