US3781949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for jet-texturing yarn at high speed
Assignee: EIDP Inc
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Filing: 1972-05-03
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Granted: 1974-01-01
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Expires: 1992-05-03
Abstract
Abstract Process and apparatus are disclosed for jet-texturing yarn of continuous filaments at high speed to increase the bulk. Thermoplastic filaments are crimped by forwarding the yarn in a jetted stream of hot compressible fluid, such as heated air or steam onto a moving screen, cooling the yarn to set the crimp prior to imposing any substantial tension on the filaments and taking up the crimped yarn from the moving screen at a take-off roll to fix the take-off position.
Inventors
- 👤 A Breen
- 👤 H Lauterbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:06
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/16; D02G1/168
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
169 words
In a process for crimping yarn of plasticizable filaments with compressible fluid heated to a temperature which will plasticize the filaments and jetted as high velocity stream from an orifice, wherein thermoplastic filaments are continuously forwarded by the heated fluid while the filaments are in a plasticized condition and then impinged in the jetted stream on a moving screen to remove the filaments from the heated fluid for cooling on the moving screen, and the cooled filaments are finally taken up from the moving screen; the improvement for uniform treatment when processing yarn at feed rates of about 2,750 or more yards per minute, which comprises removing the yarn filaments from the jetted stream on the screen within 2 inches of the outlet of the jet orifice to maintain low yarn tension, and taking the cooled filaments off of the screen around a guide roll at a uniform position in the screen travel which provides a sufficient length of passage on the moving screen for setting of the crimp.
Claim 2
Dependent Claim
169 words
In a process for crimping yarn of plasticizable filaments with compressible fluid heated to a temperature which will plasticize the filaments and jetted as high velocity stream from an orifice, wherein thermoplastic filaments are continuously forwarded by the heated fluid while the filaments are in a plasticized condition and then impinged in the jetted stream on a moving screen to remove the filaments from the heated fluid for cooling on the moving screen, and the cooled filaments are finally taken up from the moving screen; the improvement for uniform treatment when processing yarn at feed rates of about 2,750 or more yards per minute, which comprises removing the yarn filaments from the jetted stream on the screen within 2 inches of the outlet of the jet orifice to maintain low yarn tension, and taking the cooled filaments off of the screen around a guide roll at a uniform position in the screen travel which provides a sufficient length of passage on the moving screen for setting of the crimp.
Claim 3
Dependent Claim
28 words
A process as defined in claim 1 wherein the filaments are conveyed on the moving screen through a stream of cooling fluid to set crimp in the filaments.
Claim 4
Dependent Claim
19 words
A process as defined in claim 1 wherein said filaments are melt-spun, drawn and crimped in one continuous Operation.
Claim 5
Dependent Claim
26 words
A process as defined in claim 1 wherein tension on the yarn entering the jetted stream of heated fluid is maintained below 0.2 gram per denier.
Claim 6
Dependent Claim
27 words
A process as defined in claim 1 wherein the yarn filaments are removed from the jetted stream within 1/2 inch of the outlet of the jet orifice.
Claim 7
Dependent Claim
17 words
A process as defined in claim 1 wherein the yarn is impinged perpendicularly on the moving screen.
Claim 8
Dependent Claim
162 words
In an apparatus for crimping yarn of plasticizable filaments by forwarding the filaments in a high velocity stream of compressible fluid heated to a temperature which will plasticize the filaments and receiving the filaments on a moving surface for cooling, comprising jet means for jetting a high velocity stream of heated fluid, yarn conveyor means including a moving screen in the path of the jetted fluid for passage of fluid therethrough, and yarn feeding means for continuously forwarding yarn in the jetted fluid to impinge with high velocity fluid on said moving screen; the improvement for uniform yarn treatment when processing yarn at feed rates of about 2,750 or more yards per minute, wherein said conveyor means comprises a moving screen positioned to remove the yarn from the jetted stream within 2 inches after issuing from said jet device and a guide roll mounted against the screen at a subsequent position for taking yarn off of the moving screen around the roll.
Claim 9
Dependent Claim
162 words
In an apparatus for crimping yarn of plasticizable filaments by forwarding the filaments in a high velocity stream of compressible fluid heated to a temperature which will plasticize the filaments and receiving the filaments on a moving surface for cooling, comprising jet means for jetting a high velocity stream of heated fluid, yarn conveyor means including a moving screen in the path of the jetted fluid for passage of fluid therethrough, and yarn feeding means for continuously forwarding yarn in the jetted fluid to impinge with high velocity fluid on said moving screen; the improvement for uniform yarn treatment when processing yarn at feed rates of about 2,750 or more yards per minute, wherein said conveyor means comprises a moving screen positioned to remove the yarn from the jetted stream within 2 inches after issuing from said jet device and a guide roll mounted against the screen at a subsequent position for taking yarn off of the moving screen around the roll.
Claim 10
Dependent Claim
15 words
Apparatus as defined in claim 7 wherein said conveyor means comprises a screen surfaced drum.
Claim 11
Dependent Claim
17 words
Apparatus as defined in claim 7 which includes a fluid for cooling yarn on said conveyor means.
References Cited (Backward Citations)
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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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |