US3846845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of curing chemically treated cellulosic fabric
Assignee: Koratron Co Inc
•
Filing: 1971-09-01
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Granted: 1974-11-12
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Expires: 1991-09-01
Abstract
Abstract A process of curing cellulosic fabrics, which have been impregnated with a cross-linking agent, utilizing the application of microwave energy to impart durable crease resistance thereto. During curing, the heat which is generated in the fabric by the microwave energy is preserved but the water vapor thus produced is permitted to escape. The resulting cured fabric is wrinkleresistant and also exhibits increased strength and abrasion resistance compared to the same fabric cured by heat alone.
Inventors
- 👤 R Englert
- 👤 L Berriman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:10
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; Y; Y10; Y10S; Y10S8/00; Y10S8/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
A METHOD OF IMPROVING THE CREASE RESISTANCE OF A TEXTILE MATERIAL WHEREIN A CELLULOSIC CONTAINING FABRIC IMPREGNATED WITH AN AQUEOUS SOLUTION OF A CELLULOSE-REACTIVE CROSS-LINKING AGENT IS SUBJECTED TO TREATMENT WITH MICROWAVE ENERGY AT A FREQUENCY WITHIN THE RANGE OF FROM APPROXIMATELY 800 MEGACYCLES PER SECOND TO ABOUT 30 KILOMEGACYCLES PER SECOND TO ELEVATE THE FABRIC TEMPERATURE TO THE CURING TEMPERATURE AND HEAT LOSS FROM THE FABRIC SURFACE OCCASIONED BY THE EVAPORATION OF WATER THEREFROM DURING THE MICROWAVE ENERGY REACTION PROMOTION IS COMPENSATED FOR BY EITHER INTERPOSING A WATER VAPOR PERVIOUS INSULATING MATERIAL BETWEEN THE FABRIC SURFACE AND THE AMBIENT ATMOSPHERE OR DIRECTLY CONTACTING THE FABRIC SURFACE WITH AIR AT ELEVATED TEMPERATURES PRIOR TO BEGINING SAID TREATMENT WITH MICROWAVE ENERGY.
Claim 2
Independent Claim
120 words
A METHOD OF IMPROVING THE CREASE RESISTANCE OF A TEXTILE MATERIAL WHEREIN A CELLULOSIC CONTAINING FABRIC IMPREGNATED WITH AN AQUEOUS SOLUTION OF A CELLULOSE-REACTIVE CROSS-LINKING AGENT IS SUBJECTED TO TREATMENT WITH MICROWAVE ENERGY AT A FREQUENCY WITHIN THE RANGE OF FROM APPROXIMATELY 800 MEGACYCLES PER SECOND TO ABOUT 30 KILOMEGACYCLES PER SECOND TO ELEVATE THE FABRIC TEMPERATURE TO THE CURING TEMPERATURE AND HEAT LOSS FROM THE FABRIC SURFACE OCCASIONED BY THE EVAPORATION OF WATER THEREFROM DURING THE MICROWAVE ENERGY REACTION PROMOTION IS COMPENSATED FOR BY EITHER INTERPOSING A WATER VAPOR PERVIOUS INSULATING MATERIAL BETWEEN THE FABRIC SURFACE AND THE AMBIENT ATMOSPHERE OR DIRECTLY CONTACTING THE FABRIC SURFACE WITH AIR AT ELEVATED TEMPERATURES PRIOR TO BEGINING SAID TREATMENT WITH MICROWAVE ENERGY.
Claim 3
Dependent Claim
13 words
The method of claim 1 in which said cross-linking agent is dimethyl dihydroxy-imidaZolidone.
Claim 4
Dependent Claim
21 words
The method of claim 2 in which said impregnating solution contains at least about 20 weight percent of said cross-linking agent.
Claim 5
Dependent Claim
18 words
The method of claim 1 in which said impregnated fabric is formed into a garment prior to curing.
Claim 6
Dependent Claim
19 words
The method of claim 1 in which said fabric material is continually moved while microwave energy is applied thereto.
Claim 7
Dependent Claim
21 words
The method of claim 1 in which the microwaves are continually stirred while said microwave energy is applied to said fabric.
Claim 8
Dependent Claim
47 words
The method of claim 1 in which said loss of heat from said fabric is compensated by placing said fabric in an environment in which the fabric surface is directly contacted with heated air at a temperature on the order of the curing temperature for said fabric.
Claim 9
Dependent Claim
20 words
The method of claim 7 in which the temperature of said environment is between about 175* to about 500* F.
Claim 10
Dependent Claim
30 words
The method of claim 1 in which said loss of heat from said fabric is compensated by enclosing said fabric within said material prior to application of said microwave energy.
Claim 11
Dependent Claim
14 words
The method of claim 9 in which said reactive cross-linking agent is dimethyol dihydroxyimidazolidone.
Claim 12
Dependent Claim
23 words
The method of claim 10 in which said impregnating solution contains at least approximately 20 percent by weight of said reactive cross-linking agent.
Claim 13
Dependent Claim
17 words
A cellulosic containing fabric of improved strength and abrasion resistance produced by the method of claim 1.
References Cited (Backward Citations)
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US2730481A
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US2689806A
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US2865790A
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US2974432A
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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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |