US3755034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a hollow fiber separatory element
Assignee: Dow Chemical Co
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Filing: 1971-12-10
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Granted: 1973-08-28
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Expires: 1991-12-10
Abstract
Abstract A moving belt of hollow fibers is prepared by winding a continuous length of hollow fiber (or fibers) transversely around a pair of moving guide members. The moving fiber belt is convolutely wound upon an axis generally transverse to the direction of movement of said belt to form a fiber bundle. A band of solidifiable resin is applied to at least one transverse section of the hollow fiber bundle and subsequently solidified (cured) to form a tube sheet. The separatory element is then prepared by cutting the tube sheet in a plane generally perpendicular to the bundle axis to form a tube sheet face portion having open fiber ends terminating therein.
Inventors
- 👤 H Mahon
- 👤 G Doss
- 👤 D Vang
- 👤 D Gavin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:35
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/02; B01D63/021; B01D63/0233
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
17 words
The process of claim 1 wherein said guide member is a monofilament, a multifilament or a tape.
Claim 2
Dependent Claim
21 words
The process of claim 1 wherein said tube sheet is formed by applying the solidifiable resin during the winding step (b).
Claim 3
Dependent Claim
31 words
The process of claim 3 wherein a tube sheet is formed at each end of said bundle by applying a band of the solidifiable resin adjaceNt each end of said bundle.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein said bundle is formed by convolutely winding said belt around a perforated core.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein said solidifiable resin is a catalyzed epoxy resin.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein said resin is a silicone rubber.
Claim 7
Dependent Claim
28 words
The process of claim 1 wherein said moving belt is exposed at its edges to a sufficient amount of heat to soften and flatten the hollow fibers thereat.
Claim 8
Dependent Claim
13 words
The process of claim 1 wherein said guide members have an adhesive surface.
Claim 9
Dependent Claim
21 words
The process of claim 1 wherein said hollow fiber is a semipermeable hollow fiber useful for ultrafiltration, dialysis or reverse osmosis.
Claim 10
Dependent Claim
30 words
The process of claim 1 further comprising the step of chemically modifying the fibers prior to the bundle winding step by passing the fiber belt through a chemical treatment step.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |