US3862867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing reinforced nonwoven fabrics
Assignee: Fiber Technology Corp
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Filing: 1973-06-27
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Granted: 1975-01-28
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Expires: 1993-06-27
Abstract
Abstract Textile-length fibers are subjected to a centrifugal force which orients them in a lateral direction, in which orientation they are deposited upon and mechanically engaged with a set of spacedapart warp strands to form novel nonwoven fabrics.
Inventors
- 👤 Preston F Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:45
CPC Classifications
D; D04; D04H; D04H5/00; D04H5/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
THE PROCESS OF MAKING A NONWOVEN FABRIC WHICH COMPRISES PASSING A FLUID-BORNE STREAM OF TEXTILE-LENGTH FIBERS THROUGH A PASSAGEWAY HAVING A TRANSVERSELY-EXTENDED SMOOTHLY CURVED SURFACE IN THE DIRECTION OF SAID STREAM, THEREBY CHANGING THE DIRECTION OF SAID FLUID-BORNE STREAM ALONG SAID SURFACE AND CAUSING CENTRIFUGAL FORCE ON SAID FIBERS TO ALIGN SAID FIBERS IN A TRANSVERSE DIRECTION ALONG SAID SURFACE AND CONCENTRATING SAID FIBERS THEREAT IN A NARROW, TRANSVERSELY-EXTENDED BAND, COLLECTING SAID FIBERS OF SAID BAND ON A SET OF PARALLEL, SPACED-APART WARP STRANDS, SAID WRAP STRANDS EXTENDING CONTINOUSLY IN THE LONGITUDINAL DIRECTION OF SAID FABRIC, AND CAUSING A PORTION OF SAID FIBERS TO ENTANGLE WITH SAID WARP STRANDS IN MECHANICAL ENGAGEMENT BY PASSING OVER CERTAIN OF SAID WARP STRANDS AND UNDER OTHER OF SAID WARP STRANDS, AND CAUSING AN ADDITIONAL PORTION OF SAID FIBERS TO ENTANGLE WITH SAID WARP STRANDS BY HAVING A PORTION OF THEIR LENGTH WRAPPED AROUND AT LEAST A PORTION OF THE PERIMETERS OF CERTAIN OF SAID STRANDS.
Claim 2
Dependent Claim
162 words
THE PROCESS OF MAKING A NONWOVEN FABRIC WHICH COMPRISES PASSING A FLUID-BORNE STREAM OF TEXTILE-LENGTH FIBERS THROUGH A PASSAGEWAY HAVING A TRANSVERSELY-EXTENDED SMOOTHLY CURVED SURFACE IN THE DIRECTION OF SAID STREAM, THEREBY CHANGING THE DIRECTION OF SAID FLUID-BORNE STREAM ALONG SAID SURFACE AND CAUSING CENTRIFUGAL FORCE ON SAID FIBERS TO ALIGN SAID FIBERS IN A TRANSVERSE DIRECTION ALONG SAID SURFACE AND CONCENTRATING SAID FIBERS THEREAT IN A NARROW, TRANSVERSELY-EXTENDED BAND, COLLECTING SAID FIBERS OF SAID BAND ON A SET OF PARALLEL, SPACED-APART WARP STRANDS, SAID WRAP STRANDS EXTENDING CONTINOUSLY IN THE LONGITUDINAL DIRECTION OF SAID FABRIC, AND CAUSING A PORTION OF SAID FIBERS TO ENTANGLE WITH SAID WARP STRANDS IN MECHANICAL ENGAGEMENT BY PASSING OVER CERTAIN OF SAID WARP STRANDS AND UNDER OTHER OF SAID WARP STRANDS, AND CAUSING AN ADDITIONAL PORTION OF SAID FIBERS TO ENTANGLE WITH SAID WARP STRANDS BY HAVING A PORTION OF THEIR LENGTH WRAPPED AROUND AT LEAST A PORTION OF THE PERIMETERS OF CERTAIN OF SAID STRANDS.
Claim 3
Dependent Claim
19 words
The process according to claim 1 wherein a thermoplastic binder material is diffused into said fluid-borne stream of fibers.
Claim 4
Dependent Claim
14 words
The process according to claim 2 wherein the thermoplastic binder material is a powder.
Claim 5
Dependent Claim
14 words
The process according to claim 2 wherein the thermoplastic binder material is thermoplastic fibers.
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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |