US3961878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic spraying of fixing agents
Assignee: Sandoz AG
•
Filing: 1974-02-15
•
Granted: 1976-06-08
•
Expires: 1994-02-15
Abstract
Abstract The present invention relates to a method of chemically aftertreating dyed or printed textiles by electrostatically spraying the dyed or printed textiles with a developing or fixing agent.
Inventors
- 👤 Miro Capponi
- 👤 Jacques Moreau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:19
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/20; D06P5/2016; D06P1/00; D06P1/22; D06P3/00; D06P3/58; D06P3/60; D06P3/66; Y; Y10; Y10S; Y10S8/00; Y10S8/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
A process for fixing on a textile substrate a reactive dye which has been previously dyed or printed thereon which comprises applying to the dyed or printed substrate, in an electrostatic field, a spray consisting essentially of droplets of an aqueous solution of a fixing agent selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal bicarbonates and ammonium carbonate, said solution being of a concentration of 0.5 to 20%.
Claim 2
Dependent Claim
74 words
A process for fixing on a textile substrate a reactive dye which has been previously dyed or printed thereon which comprises applying to the dyed or printed substrate, in an electrostatic field, a spray consisting essentially of droplets of an aqueous solution of a fixing agent selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal bicarbonates and ammonium carbonate, said solution being of a concentration of 0.5 to 20%.
Claim 3
Dependent Claim
22 words
A process according to claim 1, in which the fixing agent is employed in a concentration range of from 1 to 5%.
Claim 4
Dependent Claim
26 words
A process according to claim 1, in which the electrostatic field is produced by a potential difference in the range of from 30 to 150 kV.
Claim 5
Dependent Claim
21 words
A process according to claim 3, in which the potential difference is in the range of from 50 to 120 kV.
Claim 6
Dependent Claim
31 words
A process according to claim 3 wherein the textile material is passed between oppositely charged poles which are 20-70 cm apart, one of said poles having a spraying apparatus associated therewith.
Claim 7
Dependent Claim
26 words
A process according to claim 3 wherein the textile material is passed between two spraying banks of opposite charge which are 20 to 70 cm apart.
Claim 8
Dependent Claim
20 words
A process according to claim 5 wherein the size of the droplets is in the range 20 to 30 mμ.
Claim 9
Dependent Claim
20 words
A process according to claim 6 wherein the textile material is passed at a speed of 5 to 15 meters/minute.
Claim 10
Dependent Claim
20 words
A process according to claim 7 wherein the textile material is passed at a speed of 5 to 15 meters/minute.
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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |