US4231165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for heat-treating a fabric web
Assignee: Bruckner Apparatebau Michelstadt GmbH
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Filing: 1978-06-12
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Granted: 1980-11-04
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Expires: 1998-06-12
Abstract
Abstract A process for heat-treating and, in particular, for drying and/or fixing a continuously moved fabric web in a treatment unit comprising at least two treatment zones through which the fabric web successively passes, using a hot gas stream recirculated in the treatment unit, a certain quantity of waste gas being continuously removed from the treatment unit and freed from constituents present in it and some of the waste gas thus treated being returned to the treatment unit after reheating, the rest of the waste gas being released into the atmosphere.
Inventors
- 👤 Harry Gresens
- 👤 Manfred Schuierer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:10
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B21/00; F26B21/30; F26B21/33; F26B21/333; F26B23/00; F26B23/02; F26B23/022
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
In a process for heat treating a fabric web to be dried and fixed wherein the web is moved through a treatment unit to pass successively through a drying zone and then through a fixing zone, said web being exposed to a hot gas stream circulated through said unit; the improvement comprising the steps of removing gas from each of said drying and fixing zones in separate respective first and second component waste gas streams, condensing condensible constituents in the first gas stream, burning combustible constituents in the second gas stream,, reheating the first gas stream following the condensing step by transfer of heat from the second gas stream, and discharging the second stream to atmosphere following the reheating of the first gas stream.
Claim 2
Dependent Claim
124 words
In a process for heat treating a fabric web to be dried and fixed wherein the web is moved through a treatment unit to pass successively through a drying zone and then through a fixing zone, said web being exposed to a hot gas stream circulated through said unit; the improvement comprising the steps of removing gas from each of said drying and fixing zones in separate respective first and second component waste gas streams, condensing condensible constituents in the first gas stream, burning combustible constituents in the second gas stream,, reheating the first gas stream following the condensing step by transfer of heat from the second gas stream, and discharging the second stream to atmosphere following the reheating of the first gas stream.
Claim 3
Dependent Claim
25 words
A process as claimed in claim 1 characterized in that the first gas stream freed from the condensible constituents is introduced into both treatment zones.
Claim 4
Dependent Claim
39 words
A process as claimed in claim 1 characterized in that between the step of burning and the step of heat transfer to the first gas stream, said second gas stream heats a fluid heat carrier in the treatment unit.
Claim 5
Dependent Claim
18 words
A process according to claim 1 characterized by preheating said second gas stream prior to the burning step.
Claim 6
Dependent Claim
27 words
A process according to claim 4 characterized in that said preheating is effected by a portion of said second gas stream following the burning of constituents therein.
Claim 7
Dependent Claim
26 words
A process as claimed in claim 4 characterized in that the second waste gas stream is preheated to between about 400° C. and about 450° C.
Claim 8
Dependent Claim
26 words
A process as claimed in claim 1 characterized in that a spray condenser is used for condensing the condensible constituents present in the first gas stream.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |