US3594878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for texturizing yarn
Assignee: Northrop Grumman Systems Corp
•
Filing: 1969-08-11
•
Granted: 1971-07-27
•
Expires: 1989-08-11
Abstract
Abstract A method and device for crimping continuous filament yarn comprising providing a gas-actuated aspirator tube which serves to pull the yarn from its source and direct it to a crimping region which comprises a diffuser means downstream from the aspirator which separates the gas from the yarn, crimps the yarn and serves as a pressure means for forcing the yarn into a heater region where the crimping is set.
Inventors
- 👤 William D Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:45
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
13 words
The device of claim 1 further comprising: means for heat-setting the crimped yarn.
Claim 2
Dependent Claim
38 words
The device of claim 1 wherein said gas actuated aspirator comprises: a generally tubular section, and means for allowing pressurized gas to enter an upstream end of said section and exit a downstream end together with said yarn.
Claim 3
Dependent Claim
28 words
The device of claim 3 further comprising: an inlet convergent nozzle formed at the upstream end of said tubular section, said gas entering said section through said nozzle.
Claim 4
Dependent Claim
51 words
The device of claim 4 wherein said means for directing said yarn to said aspirator comprises: a hollow tubular member having an inlet upstream end through which the yarn enters and a downstream exit end, said exit end cooperating with the inlet of said aspirator to form said inlet convergent nozzle.
Claim 5
Dependent Claim
16 words
The device of claim 4 further comprising: an exit divergent nozzle formed in said tubular section.
Claim 6
Dependent Claim
49 words
The device of claim 2 wherein said means for heat-setting comprises: a hollow tubular member disposed downstream from said receiving and crimping means, a heating means surrounding an upstream portion of said tubular member, the remaining downstream portion being of sufficient length to allow the heated yarn to cool.
Claim 7
Dependent Claim
30 words
The device of claim 3 wherein said means for forming said plug and crimping said yarn comprises: a hollow tubular section having a plurality of apertures in the walls thereof.
Claim 8
Dependent Claim
21 words
The device of claim 8 wherein said plug-forming and crimping means is disposed immediately adjacent the exit nozzle of said aspirator.
Claim 9
Independent Claim
57 words
A method of crimping yarn comprising: directing said yarn to a gas-actuated aspirator, feeding pressurized gas through said aspirator whereby said yarn is pulled therethrough by the aspirating effect, selectively folding said yarn into a yarn plug formation to vary the type of crimp formed in the yarn, and crimping said yarn while in said plug formation.
Claim 10
Dependent Claim
21 words
The method of claim 10 further comprising: separating the gas leaving the aspirator from the yarn simultaneously with the crimping thereof.
Claim 11
Dependent Claim
26 words
The method of claim 11 further comprising: controlling the separation of said gas from said yarn to allow a pressure buildup within the crimped yarn plug.
Claim 12
Dependent Claim
21 words
The method of claim 10 further comprising: heating said yarn plug to set the crimp therein, and cooling said heated yarn.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |