US3886636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarn processing
Assignee: Phillips Petroleum Co
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Filing: 1973-05-24
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Granted: 1975-06-03
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Expires: 1993-05-24
Abstract
Abstract A continuous synthetic filament yarn is processed by crimping, entangling, and straightening the yarn. The yarn is straightened by heating under tension, resulting in a yarn that can be used in its straightened form and later bulked by a subsequent process such as dyeing, boiling, heating etc. The length of a yarn plug formed by crimping is controlled by controlling the temperature of the yarn.
Inventors
- 👤 David E Borenstein
- 👤 Richard C Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:26
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A method for processing yarn in one continuous operation without allowing the yarn to cool to ambient temperature comprising: crimping a heated yarn; entangling the crimped yarn while under low tension; and heating the entangled yarn under a higher tension and thereafter packaging the entangled yarn while still warm and under tension thereby producing a straightened yarn which after cooling in the straightened form will assume a crimped form upon subsequent heating in a relaxed state.
Claim 2
Independent Claim
76 words
A method for processing yarn in one continuous operation without allowing the yarn to cool to ambient temperature comprising: crimping a heated yarn; entangling the crimped yarn while under low tension; and heating the entangled yarn under a higher tension and thereafter packaging the entangled yarn while still warm and under tension thereby producing a straightened yarn which after cooling in the straightened form will assume a crimped form upon subsequent heating in a relaxed state.
Claim 3
Independent Claim
76 words
A method for processing yarn in one continuous operation without allowing the yarn to cool to ambient temperature comprising: crimping a heated yarn; entangling the crimped yarn while under low tension; and heating the entangled yarn under a higher tension and thereafter packaging the entangled yarn while still warm and under tension thereby producing a straightened yarn which after cooling in the straightened form will assume a crimped form upon subsequent heating in a relaxed state.
Claim 4
Independent Claim
76 words
A method for processing yarn in one continuous operation without allowing the yarn to cool to ambient temperature comprising: crimping a heated yarn; entangling the crimped yarn while under low tension; and heating the entangled yarn under a higher tension and thereafter packaging the entangled yarn while still warm and under tension thereby producing a straightened yarn which after cooling in the straightened form will assume a crimped form upon subsequent heating in a relaxed state.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the feed yarn is drawn and immediately passed to crimping.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein the yarn processed is polyester.
Claim 7
Dependent Claim
11 words
The method of claim 1 wherein the yarn processed is nylon.
Claim 8
Dependent Claim
46 words
The method of claim 4 wherein said nylon yarn is crimped by using a fluid jet and the resulting crimped and entangled yarn is straightened by contacting said yarn with saturated steam under tension sufficient to straighten the yarn but not sufficient to draw the yarn.
Claim 9
Dependent Claim
22 words
The method of claim 5 wherein the tension used to straighten the yarn is in the range of 0.04 to 0.12 grams/denier.
References Cited (Backward Citations)
US3143784A
Cited
US3399108A
Cited
US3671619A
Cited
US3461521A
Cited
US3778872A
Cited
US3703753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |