Patent US3911073A successfully refreshed from Google Patents.
US3911073A
Expired / Lapsed
US
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Process for inverting flow in a conduit
Assignee: LACELLUPHANE
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Filing: 1973-07-16
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Granted: 1975-10-07
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Expires: 1993-07-16
Abstract
Abstract A flow exchanging process for diverting a fluid flowing on the periphery of a conduit towards the center thereof and simultaneously diverting a second fluid flowing in the center of the conduit to the periphery thereof, utilizes open tapered pipe having a plurality of openings on its walls and protruding lips around each of the openings for diverting the peripheral flow towards the center of the conduit. The center flow is diverted to the periphery through the wall openings. The process is particularly adapted to use in the spinning of cellulose films from two qualities of viscose.
Inventors
- 👤 Francois Charles-Massance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:17
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/695; B29C48/70; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/431; B29C48/362; B29C48/705; B29C48/03; B29C48/05; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
IN A PROCESS FOR PRODUCING CELLULOSE FILMS BY EXTRUSION OF VISCOSE FROM A HOPPER INTO AN ACIDIC COAGULATION BATH, WHEREIN THE VISCOSE IS FED TO THE HOPPER THROUGH CONDUIT MEANS EXTENDING ALONG A LONGITUDINAL AXIS WHILE BEING CONTAINED BY THE INNER PERIPHERY OF THE CONDUIT MEANS, THE IMPROVEMENT COMPRISING THE STEPS OF: DIVERTING THE VISCOSE FLOWING ADJACENT TO THE INNER PERIPHERY OF THE CONDUIT MEANS TOWARD THE LONGITUDINAL AXIS OF THE CONDUIT MEANS, WHILE SIMULTANEOUSLY DIVERTING A SUBSTANTIAL PORTION OF THE VISCOSE FLOWING ADJACENT TO THE LONGITUDINAL AXIS TOWARD THE INNER PERIPHERY OF THE CONDUIT, AND THE CONTAINING THE DIVERTED VISCOSE FLOWS DOWNSTREAM OF SAID DIVERSIONS IN AN INVERTED STATE.
Claim 2
Dependent Claim
110 words
IN A PROCESS FOR PRODUCING CELLULOSE FILMS BY EXTRUSION OF VISCOSE FROM A HOPPER INTO AN ACIDIC COAGULATION BATH, WHEREIN THE VISCOSE IS FED TO THE HOPPER THROUGH CONDUIT MEANS EXTENDING ALONG A LONGITUDINAL AXIS WHILE BEING CONTAINED BY THE INNER PERIPHERY OF THE CONDUIT MEANS, THE IMPROVEMENT COMPRISING THE STEPS OF: DIVERTING THE VISCOSE FLOWING ADJACENT TO THE INNER PERIPHERY OF THE CONDUIT MEANS TOWARD THE LONGITUDINAL AXIS OF THE CONDUIT MEANS, WHILE SIMULTANEOUSLY DIVERTING A SUBSTANTIAL PORTION OF THE VISCOSE FLOWING ADJACENT TO THE LONGITUDINAL AXIS TOWARD THE INNER PERIPHERY OF THE CONDUIT, AND THE CONTAINING THE DIVERTED VISCOSE FLOWS DOWNSTREAM OF SAID DIVERSIONS IN AN INVERTED STATE.
Claim 3
Dependent Claim
160 words
In a process for producing cellulose films by extrusion of viscose from a hopper into an acidic coagulation bath, wherein the viscose is fed to the hopper through conduit means extending along a longitudinal axis while being contained by the inner periphery of the conduit means, the improvement comprising the steps of: diverting the viscose flowing adjacent to the inner periphery toward the longitudinal axis of the conduit means by decreasing the cross-sectional area defined by the inner periphery while simultaneously increasing the cross-sectional area of a plug within said conduit; releasing the viscose downstream of the plug; diverting simultaneously the viscose flowing adjacent to the longitudinal axis toward the inner periphery by flowing the viscose through openings in said conduit as said cross-sectional area decreases while deflecting the viscose flowing adjacent to the inner periphery away from said openings toward the longitudinal axis; and then containing the viscose flows downstream in an inverted relationship created by the afore-cited diversions.
Claim 4
Dependent Claim
160 words
In a process for producing cellulose films by extrusion of viscose from a hopper into an acidic coagulation bath, wherein the viscose is fed to the hopper through conduit means extending along a longitudinal axis while being contained by the inner periphery of the conduit means, the improvement comprising the steps of: diverting the viscose flowing adjacent to the inner periphery toward the longitudinal axis of the conduit means by decreasing the cross-sectional area defined by the inner periphery while simultaneously increasing the cross-sectional area of a plug within said conduit; releasing the viscose downstream of the plug; diverting simultaneously the viscose flowing adjacent to the longitudinal axis toward the inner periphery by flowing the viscose through openings in said conduit as said cross-sectional area decreases while deflecting the viscose flowing adjacent to the inner periphery away from said openings toward the longitudinal axis; and then containing the viscose flows downstream in an inverted relationship created by the afore-cited diversions.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |