US4612150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for combining and codrawing antistatic filaments with undrawn nylon filaments
Assignee: EIDP Inc
•
Filing: 1983-11-28
•
Granted: 1986-09-16
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Expires: 2003-11-28
Abstract
Abstract Electrically conductive and nonconductive filaments are combined in a quench chimney and then codrawn and cobulked prior to wind-up.
Inventors
- 👤 Jack R. De Howitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:37
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/44; D02G3/441; Y; Y10; Y10S; Y10S57/00; Y10S57/901
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
60 words
A process for producing a carpet yarn with reduced static propensity comprising melt spinning a plurality of nonconductive nylon filaments into a quench chimney, pneumatically introducing spin-oriented electrically conductive bicomponent filaments into the freshly spun threadline within the quench chimney, consolidating the combined yarn at a puller roll, drawing and cobulking the combined yarn and then winding up the yarn.
Claim 2
Dependent Claim
60 words
A process for producing a carpet yarn with reduced static propensity comprising melt spinning a plurality of nonconductive nylon filaments into a quench chimney, pneumatically introducing spin-oriented electrically conductive bicomponent filaments into the freshly spun threadline within the quench chimney, consolidating the combined yarn at a puller roll, drawing and cobulking the combined yarn and then winding up the yarn.
Claim 3
Dependent Claim
42 words
The process of claim 1 wherein the electrically conductive bicomponent filaments have a synthetic thermoplastic fiber-forming polymer component that encapsulates more than 50% of the conductive core component, the latter comprising a synthetic thermoplastic polymer containing electrically conductive carbon black dispersed therein.
Claim 4
Dependent Claim
14 words
The process of claim 2 wherein the component that encapsulates the core is nylon.
Claim 5
Dependent Claim
25 words
The process of claim 1 wherein the bicomponent filaments are introduced in an amount of from 1 to 10 wt % of the combined yarn.
References Cited (Backward Citations)
US2936482A
Cited
US2989798A
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US3186155A
Cited
US3969559A
Cited
US4069657A
Cited
JPS5325893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |