US4248592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for coloring tow and colored tow produced therefrom
Assignee: Individual
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Filing: 1979-02-13
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Granted: 1981-02-03
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Expires: 1999-02-13
Abstract
Abstract A method is disclosed for applying color to continuous synthetic fibers in the form of tow comprising the steps of first spreading the tow into a flattened sheet, applying color in a first predetermined design pattern to one side of the sheet so as to impregnate the color into the depth of the sheet to a given depth, and then applying color in a second predetermined design pattern to the other side of the sheet so as to impregnate the color into the depth of the sheet from the other side. The thus treated tow is suitable for forming into blended yarn, commonly known as "heather". An apparatus is also disclosed for accomplishing the above treatment and continuous fibers in the form of tow having intermittent portions of said fibers colored are also disclosed.
Inventors
- 👤 Juan Salvans
- 👤 Carlos Del Cueto
- 👤 Fernando L. Del Cueto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:33
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/0096; D06B; D06B11/00; D06B11/0003; D06B11/0006; D06P7/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
A method for applying a color to continuous synthetic fibers in the form of tow comprising the steps of: (a) spreading the tow into a flattened sheet; (b) applying a coloring agent in a first predetermined design pattern to one side of the sheet so as to impregnate the color into the depth of the sheet and then (c) applying a coloring agent in a second predetermined design pattern to the other side of the sheet so as to impregnate the color into the depth of the sheet from said other side; said first and second design patterns being selected so as to produce intermittent colored and uncolored portions along the length of the fibers.
Claim 2
Independent Claim
115 words
A method for applying a color to continuous synthetic fibers in the form of tow comprising the steps of: (a) spreading the tow into a flattened sheet; (b) applying a coloring agent in a first predetermined design pattern to one side of the sheet so as to impregnate the color into the depth of the sheet and then (c) applying a coloring agent in a second predetermined design pattern to the other side of the sheet so as to impregnate the color into the depth of the sheet from said other side; said first and second design patterns being selected so as to produce intermittent colored and uncolored portions along the length of the fibers.
Claim 3
Dependent Claim
35 words
The method of claim 1 wherein the coloring agent applied is a textile dye and wherein after application of color to both sides of the sheet, the colored sheet is subject to dye fixation conditions.
Claim 4
Dependent Claim
324 words
The method of claim 2 wherein the dye application of step (b) is carried out by (d) dyeing a first side of the sheet by passing the sheet through a first dye station comprising a print roll having raised portions thereon in the pattern desired to be printed onto the sheet a second roll disposed opposite the print roll and in pressurized contact therewith for passing the sheet between and in contact with both the print and second rolls, said second roll having an absorbent outer covering for retaining dye; and said covering being continuously impregnated with dye such that on passing the sheet through the space between the rolls, the raised portions of the print roll come into pressured contact with portions of the sheet and press said portions into the dye impregnated covering thereby transferring dye to that side of the sheet in contact with said covering in the predetermined design pattern and then (e) dyeing the other side of the sheet by passing the sheet through a second dye station comprising a print roll having raised portions thereon in the pattern desired to be printed onto the sheet; a second roll disposed opposite the print roll and in pressurized contact therewith for passing the sheet between and in contact with both the print and second rolls, said second roll having an absorbent outer covering for retaining dye; and said covering being continuously impregnated with dye such that on passing the sheet through the space between the rolls, the raised portions of the print roll come into pressured contact with portions of the sheet and press said portions into the dye impregnated covering thereby transferring dye to that side of the sheet in contact with said covering in the predetermined design pattern said print and second roll in said second dye station being disposed relative to one another in a manner opposite to that of the rolls of the first dye station.
Claim 5
Dependent Claim
25 words
The method of claim 3 wherein the color applied at the first dye station is different from the color applied at the second dye station.
Claim 6
Dependent Claim
17 words
The method of claim 3 wherein the first design pattern is different from the second design pattern.
Claim 7
Dependent Claim
24 words
The method of claim 2 wherein the sheet is held in pressurized contact with the covered roll by applying pressure to the print roll.
Claim 8
Dependent Claim
54 words
The method of claim 2 wherein the means for impregnating the covered roll comprises a dye reservoir and a dye transfer roll, a portion of which passes through said dye reservoir and picks up dye, said transfer roll being in pressurized contact with said covered roll thereby transferring said dye to said covered roll.
Claim 9
Dependent Claim
30 words
The method of claim 6 wherein the pressure of the pick up roll against said covered roll is varied to vary the amount of dye transferred to said covered roll.
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) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |