Patent US2235682A successfully refreshed from Google Patents.
Patent US358677A successfully refreshed from Google Patents.
US3698024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of continuous fabric webs
Assignee: Bruckner Apparatebau Michelstadt GmbH
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Filing: 1971-03-03
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Granted: 1972-10-17
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Expires: 1991-03-03
Abstract
Abstract The web is wet with a solvent, dried in a stream of circulating air in a drying chamber, and then cooled. A secondary stream of air is withdrawn from the circulating air, cooled in a condenser to recover solvent, reheated, and returned to the circulating air. The web leaving the drying chamber is precooled in a separate chamber by means of the secondary air stream, after such stream is cooled and before it is reheated.
Inventors
- 👤 Kurt Bruckner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:13
CPC Classifications
D; D06; D06B; D06B9/00; D06B9/06; Y; Y02; Y02P; Y02P70/00; Y02P70/50; Y02P70/62
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A method of treating a continuous fabric web in a closed system, comprising the steps of wetting the web with a solvent, drying the web in a stream of circulating air in a drying chamber, and then cooling the web, a secondary stream of air being withdrawn from the circulating air, cooled in a condenser to recover solvent, reheated, and returned to the circulating air, wherein the improvement comprises the step of pre-cooling the web leaving the drying chamber, in a separate chamber by means of the secondary air stream, after such stream is cooled and before it is reheated.
Claim 2
Independent Claim
100 words
A method of treating a continuous fabric web in a closed system, comprising the steps of wetting the web with a solvent, drying the web in a stream of circulating air in a drying chamber, and then cooling the web, a secondary stream of air being withdrawn from the circulating air, cooled in a condenser to recover solvent, reheated, and returned to the circulating air, wherein the improvement comprises the step of pre-cooling the web leaving the drying chamber, in a separate chamber by means of the secondary air stream, after such stream is cooled and before it is reheated.
Claim 3
Dependent Claim
29 words
A method according to claim 1 wherein a portion of the secondary stream of air is caused to bypass the cooling condenser in order to prevent undesired subsequent condensation.
Claim 4
Dependent Claim
134 words
Apparatus for treating a continuous fabric web, comprising a wet treatment chamber in which the web is wetted by a solvent, a drying chamber in which the solvent is evaporated from the web by hot air circulation, a secondary air circulation system for withdrawing air from the drying chamber, including a cooling condenser through which the air is passed, and a heater for reheating the secondary air stream, which is connected to return the reheated air stream to the drying chamber, wherein the improvement comprises a separate chamber which is entered by the fabric web leaving the drying chamber, which is connected in circuit with the secondary air stream between the condenser and the heater, and which is provided with a restricted outlet for the fabric web to minimize loss of the secondary air.
Claim 5
Dependent Claim
134 words
Apparatus for treating a continuous fabric web, comprising a wet treatment chamber in which the web is wetted by a solvent, a drying chamber in which the solvent is evaporated from the web by hot air circulation, a secondary air circulation system for withdrawing air from the drying chamber, including a cooling condenser through which the air is passed, and a heater for reheating the secondary air stream, which is connected to return the reheated air stream to the drying chamber, wherein the improvement comprises a separate chamber which is entered by the fabric web leaving the drying chamber, which is connected in circuit with the secondary air stream between the condenser and the heater, and which is provided with a restricted outlet for the fabric web to minimize loss of the secondary air.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |