US3615967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a fibrous fabric
Assignee: Individual
•
Filing: 1968-08-02
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Granted: 1971-10-26
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Expires: 1988-08-02
Abstract
Abstract A method of manufacturing a fibrous fabric in which fibers are injected into a web of fibrous material in a direction substantially normal to a major surface of the web. The web is then impregnated with a binding agent to bond the fibers of the web and the injected fibers. The injected fibers strengthen the web in the direction normal to the web major surfaces and, in the case where the web is constituted from two or more fibrous layers, interlinks the layers. The fibers can be injected by means of a compressed air blower or by electrostatic action between spaced electrodes.
Inventors
- 👤 Pius Stebler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:47
CPC Classifications
D; D04; D04H; D04H5/00; D04H5/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
59 words
A method according to claim 1, comprising: forming a tubular wall from intersecting strands of fiber, injecting fibers into the tubular wall in a direction substantially normal to the wall, impregnating the wall with a binding agent, slitting the wall along an axially extending line, anD unfolding the tubular wall to form a fabric lying substantially in one plane.
Claim 2
Dependent Claim
42 words
Apparatus for manufacturing a fibrous fabric comprising: means for supporting a fibrous web, means for injecting fibers into the web in a direction substantially normal to a major surface of the web, and means for impregnating the web with a binding agent.
Claim 3
Dependent Claim
28 words
Apparatus as claimed in claim 3, further comprising means for providing a fiber-carrying gas stream, and nozzle means adapted to direct said fiber-carrying gas stream towards the web.
Claim 4
Dependent Claim
48 words
Apparatus as claimed in claim 3, wherein said means for injecting the fibers into the web comprise spaced high-tension and earth-potential electrodes, said electrodes defining together a passage for the web; and a means for feeding fibers into said passage between the web and one of said electrodes.
Claim 5
Dependent Claim
25 words
Apparatus as claimed in claim 5, comprising means for feeding the web through said passage, and binding agent discharge nozzle means located after the passage.
Claim 6
Dependent Claim
29 words
Apparatus as claimed in claim 5, comprising an endless belt for feeding the fibers into said passage, and means for metering fibers from a storage container onto said belt.
Claim 7
Dependent Claim
138 words
Apparatus for manufacturing a fibrous fabric, comprising: first feeding means for feeding a plurality of continuous fibrous strands parallel to, and spaced about, an axis so as to define a tubular structure formed by a plurality of axially extending strands, second feeding means rotatably supported downstream of said first feeding means for feeding fibrous strands around said tubular structure, and means for rotating said second feeding means around said tubular structure to form a wound tubular structure, takeup means downstream of said second feeding means for pulling said wound tubular structure past said second feeding means, a nozzle for feeding a fiber-carrying gas stream into said wound tubular structure, deflection means for deflecting the fiber-carrying gas stream radially outwards, and impregnation means for impregnating said wound tubular structure subsequent to the injection of fibers into the wall thereof.
Claim 8
Dependent Claim
46 words
Apparatus as claimed in claim 8, wherein said takeup means includes means for axially slitting the wall of said wound tubular structure, means for unrolling the slit wound tubular structure to form a flat web and a takeup roller for continuously taking up said flat web.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |