US3765840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for controlling the temperature of a dyeing mixture
Assignee: DARKO LOUIS L
•
Filing: 1971-05-20
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Granted: 1973-10-16
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Expires: 1991-05-20
Abstract
Abstract A process and apparatus is disclosed which is used in dyeing textiles. The dye liquor has less than 10 percent water in perchlorethylene along with a dye and an emulsifier to keep the water emulsified in the perchlorethylene. The dye liquor is heated to cause the mixture to boil and the vapors are condensed. The condensed vapors are directed away from the dye liquor until a desired temperature is reached, at which point they are directed back to the dye liquor to prevent a further temperature increase.
Inventors
- 👤 L Durr
- 👤 B Clay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:28
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/90; D06P1/92; D06P1/922; D06P1/924; D06B; D06B23/00; D06B23/20; D06B23/22; D06B9/00; D06B9/02; H; H05; H05B; H05B7/00; H05B7/18; H05B7/185; Y; Y10; Y10S; Y10S8/00; Y10S8/934
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
40 words
The process of claim 1 which additionally comprises the subsequent step of e. directing all of the condensate coming from said condenser after the desired temperature has been reached back into the dyeing mixture to prevent a further temperature increase.
Claim 2
Dependent Claim
22 words
The process of claim 1 in which one of the liquids is water and another of the liquids is a halogenated hydrocarbon.
Claim 3
Dependent Claim
26 words
The process of claim 3 in which the halogenated hydrocarbon is perchlorethylene and the water is present in an amount less than 5 percent by weight.
Claim 4
Dependent Claim
21 words
The process of claim 1 in which two of the liquids of the dyeing mixture form an azeotrope with each other.
Claim 5
Dependent Claim
20 words
The process of claim 1 in which two of the liquids of the dyeing mixture are immiscible with each other.
Claim 6
Dependent Claim
126 words
A process for controlling the temperature of a dyeing mixture under atmospheric pressure which contains water and perchlorethylene which compriseS: a. subjecting textiles to be dyed under atmospheric pressure to a dyeing mixture containing perchlorethylene, a dye and less than 5 percent by weight of water, the amount of water being the amount required to give the mixture after reaching equilibrium a boiling point which is the temperature desired for dyeing the textiles, b. heating the mixture, to which the textiles are being subjected, to the boiling point, c. condensing the vapors from the heated dyeing mixture with a condenser to form a condensate, and d. returning the condensate to the dyeing mixture to prevent any further rise in the boiling point of the dyeing mixture.
Claim 7
Dependent Claim
39 words
The process of claim 7 in which the amount of water in the dyeing mixture will cause the mixture to boil at a temperature from 97* to 101* C while the condensate is being returned to the dyeing mixture.
Claim 8
Dependent Claim
60 words
A process for dyeing textiles which comprises: a. subjecting the textiles to a dyeing mixture containing by weight: from about 0.8 to 4.0 percent water, from 70 to 98 percent of perchlorethylene, from 0.05 to 8 percent of an emulsifying agent, and from 0.05 to 10 percent of a dye at a temperature above 90* C and under atmospheric pressure.
Claim 9
Dependent Claim
18 words
The process of claim 9 in which the textile is polyester and said dye is a disperse dye.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |