Patent US3670485A successfully refreshed from Google Patents.
US3670485A
Expired / Lapsed
US
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Method of and apparatus for forming metal fiber textile blend and metal fiber textile product
Assignee: Pall Filtration and Separations Group Inc
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Filing: 1969-02-14
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Granted: 1972-06-20
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Expires: 1989-02-14
Abstract
Abstract A method of and apparatus for blending conductive metal filament material with nonconductive textile material wherein the textile material is partially carded and the metal filament is delivered to the partially carded material and subsequently carded with said material to break the filament into short metal fibers and blend the metal fibers substantially uniformly with the conductive textile material.
Inventors
- 👤 Perry H Brown
- 👤 Harold H Webber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:38
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/44; D02G3/441
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
67 words
A method of forming an anti-static yarn comprising the steps of: forming a composite web by continuously combining a tow of cardable electrically conductive filament material with a web formed of electrically non-conductive staple fibers; carding said composite web thereby breaking and blending said tow into conductive fibers with said non-conductive fibers to form a substantially uniform blended carded web; and forming said blended web into yarn.
Claim 2
Independent Claim
67 words
A method of forming an anti-static yarn comprising the steps of: forming a composite web by continuously combining a tow of cardable electrically conductive filament material with a web formed of electrically non-conductive staple fibers; carding said composite web thereby breaking and blending said tow into conductive fibers with said non-conductive fibers to form a substantially uniform blended carded web; and forming said blended web into yarn.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said filament material comprises continuous filaments.
Claim 4
Dependent Claim
19 words
The method of claim 1 further including the step of condensing said composite web prior to said carding step.
Claim 5
Dependent Claim
24 words
The method of claim 1 further including the step of condensing said partially carded web concurrently with the delivery of said filament material thereto.
Claim 6
Dependent Claim
23 words
The method of claim 1 further including the step of condensing said partially carded web prior to delivery of said filament material thereto.
Claim 7
Dependent Claim
14 words
The method of claim 1 wherein said filament material comprises a single end tow.
Claim 8
Dependent Claim
22 words
The method of claim 1 wherein said filament material is delivered to said partially carded web substantially at the center line thereof.
Claim 9
Dependent Claim
24 words
The method of claim 1 further including the step of burr crushing said partially carded web prior to delivery of said filament material thereto.
Claim 10
Dependent Claim
19 words
The method of claim 1 wherein each filament of the tow has a diameter of less than 0.001 inch.
Claim 11
Dependent Claim
20 words
The method of claim 1 wherein said carding of the composite web causes said conductive filaments are in staple form.
Claim 12
Dependent Claim
24 words
The method of claim 1 wherein the proportion of said conductive material to said nonconductive fibers in said yarn is less than 1 percent.
Claim 13
Dependent Claim
43 words
The method of claim 1 wherein said filament material is provided in the form of a spool of tow and is delivered from the side of the spool to said partially carded web to preclude twisting thereof as an incident of the delivery.
Claim 14
Dependent Claim
18 words
The method of claim 1 wherein said filament material comprises a tow of over 100 substantially continuous filaments.
Claim 15
Dependent Claim
12 words
The method of claim 1 wherein said conductive material comprises metal material.
Claim 16
Independent Claim
42 words
An apparatus for forming a composite web including a carding machine having two carding cylinders and a condenser located therebetween in combination with means for introducing and maintaining under tension a tow of continuous filaments at the condenser of said carding machine.
Claim 17
Independent Claim
42 words
An apparatus for forming a composite web including a carding machine having two carding cylinders and a condenser located therebetween in combination with means for introducing and maintaining under tension a tow of continuous filaments at the condenser of said carding machine.
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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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |