Patent US3591955A successfully refreshed from Google Patents.
US3591955A
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US
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Process for producing a slub yarn
Assignee: Nippon Rayon Co Ltd
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Filing: 1969-06-23
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Granted: 1971-07-13
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Expires: 1989-06-23
Abstract
Abstract A process for producing slubs onto a multifilament yarn which comprises feeding the yarn into a hood receiving a jet of compressed gas and withdrawing the yarn through a hole of the hood from the deflected stream of the gas at lower rate than the feed rate.
Inventors
- 👤 Shiro Fujita
- 👤 Jusuke Ushiki
- 👤 Nagao Nishizawa
- 👤 Seiji Okawa
- 👤 Kunio Sekiya
- 👤 Hiroshi Kadowaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:01
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/16; D02G1/02; D02G1/0206; D02G1/024
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
25 words
The process as defined in claim 1 wherein the centerline of the jetted stream of gas is offset from the central axis of the hood.
Claim 2
Dependent Claim
19 words
The process as defined in claim 1 wherein the compressive gas is jetted into the chamber of the hood.
Claim 3
Dependent Claim
18 words
A process of claim 1 wherein the pressure of the compressive gas is at least 0.5 kg./cm.2 .
Claim 4
Dependent Claim
136 words
A process for producing a slub yarn which includes the steps of: a. jetting a stream of compressive gas into a hood having a hole at the apex thereof to deflect at the apex and to escape backwardly, b. feeding a multifilament yarn in the deflected stream of gas to fold back the filaments on themselves at the apex of the hood, and c. withdrawing the yarn from the deflected stream of gas through the hole in the hood, at a rate of at least 0.5 percent less than the rate of feed, so that the yarn passes through the deflected stream of gas in a countercurrent direction to form slubs composed of filament loops consolidated into the yarn by filament entanglement, and d. false-twisting the yarn After passing through the hood to stabilize the configuration.
Claim 5
Dependent Claim
22 words
The process as defined in claim 5 wherein the false twisting is performed by passing through a vortex of a compressive gas.
Claim 6
Dependent Claim
31 words
The process as defined in claim 5 wherein the false twisting is performed by passing through a moving friction means in friction contact with the surface of said moving friction means.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |