US3892622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inlaying continuous filamentous reinforcement in a nonwoven web
Assignee: Beloit Corp
•
Filing: 1973-12-05
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Granted: 1975-07-01
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Expires: 1993-12-05
Abstract
Abstract Inlaying a continuous filamentous reinforcement, such as individual filaments or scrim, in nonwoven web material is effected by carrying the filamentous reinforcement in the slurry stream in a headbox to a web forming porous traveling surface and on the forming surface forming the slurry into a fibrous web with the filamentous reinforcement integrally embedded in the web. Introduction of the filamentous reinforcement into the slurry in the headbox may be effected through one or more nozzles discharging downstream in the headbox, the filamentous reinforcement being transported through the nozzle in a carrier liquid such as water. The nozzle may have a venturi geometry whereby to assure a pressure drop for positively drawing the filamentous reinforcement from the nozzle into the pressurized slurry stream.
Inventors
- 👤 Borgeir Skaugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:34
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/30; D21H27/32; D21H27/34
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
83 words
A METHOD OF INLAYING A CONTINUOUS FILAMENTOUS REINFORCEMENT IN A NONWOVEN WEB, COMPRISING: SUPPLYING FIBROUS STOCK SLURRY THROUGH AN ELONGATED ORIFICE INTO A STREAM TRAVELING THROUGH A HEADBOX TO A WEB-FORMING POROUS TRAVELING SURFACE, FEEDING FILAMENTOUS REINFORCEMENT THROUGH A NOZZLE DISCHARGING DOWNSTREAM WITHIN THE ORIFICE AND THEREBY INTO THE SLURRY STREAM, CARRYING THE FILAMENTOUS REINFORCEMENT IN THE SLURRY STREAM TO THE FORMING SURFACE, AND ON THE FORMING SURFACE FORMING THE SLURRY INTO A WEB WITH THE FILAMENTOUS REINFORCEMENT INTEGRALLY EMBEDDED IN THE WEB.
Claim 2
Independent Claim
83 words
A METHOD OF INLAYING A CONTINUOUS FILAMENTOUS REINFORCEMENT IN A NONWOVEN WEB, COMPRISING: SUPPLYING FIBROUS STOCK SLURRY THROUGH AN ELONGATED ORIFICE INTO A STREAM TRAVELING THROUGH A HEADBOX TO A WEB-FORMING POROUS TRAVELING SURFACE, FEEDING FILAMENTOUS REINFORCEMENT THROUGH A NOZZLE DISCHARGING DOWNSTREAM WITHIN THE ORIFICE AND THEREBY INTO THE SLURRY STREAM, CARRYING THE FILAMENTOUS REINFORCEMENT IN THE SLURRY STREAM TO THE FORMING SURFACE, AND ON THE FORMING SURFACE FORMING THE SLURRY INTO A WEB WITH THE FILAMENTOUS REINFORCEMENT INTEGRALLY EMBEDDED IN THE WEB.
Claim 3
Dependent Claim
22 words
A method according to claim 1, including effecting a pressure drop at the discharge end of the nozzle within the elongated orifice.
Claim 4
Dependent Claim
23 words
A method according to claim 1, comprising conveying the filamentous reinforcement in a fluid carrier to and through the nozzle into the orifice.
Claim 5
Dependent Claim
23 words
A method according to claim 3, comprising supplying the filamentous reinforcement and the fluid carrier into conveyor pipe means leading to the nozzle.
Claim 6
Dependent Claim
31 words
A method according to claim 1, comprising carrying said filamentous reinforcement in a fluid carrier under pressure into the nozzle for feeding the reinforcement into the slurry stream through the orifice.
Claim 7
Dependent Claim
31 words
A method according to claim 1, comprising correlating the velocity of filamentous reinforcement feeding in the nozzle with the rate of travel of the slurry stream to the web forming surface.
Claim 8
Dependent Claim
31 words
A method according to claim 1, comprising feeding the filamentous reinforcement in the form of a plurality of individual filaments through respective nozzles into respective orifices discharging into the slurry stream.
Claim 9
Dependent Claim
36 words
A method according to claim 1, comprising feeding the filamentous reinforcement in the Form of scrim through a nozzle which is of substantial width into an orifice of complementary width and therefrom into the slurry stream.
Claim 10
Dependent Claim
46 words
A method according to claim 1, comprisng supplying the fibrous stock slurry into a header, conducting the slurry from the header through said orifice in a manifold in the headbox, and effecting said feeding of the filamentous reinforcement through said header and then into the nozzle.
Claim 11
Dependent Claim
94 words
Apparatus including a headbox, means for supplying fibrous stock slurry to flow in a stream through the headbox, and a web-forming porous traveling surface receiving the slurry from the headbox, the improvement comprising: said means for supplying the stock slurry comprising an elongated orifice discharging into the headbox; and means for feeding filamentous reinforcement comprising a nozzle discharging downstream within said orifice and thereby into the slurry stream so that the reinforcement will be carried in the slurry stream to the forming surface and the filamentous reinforcement will be integrally imbedded in the web.
Claim 12
Dependent Claim
94 words
Apparatus including a headbox, means for supplying fibrous stock slurry to flow in a stream through the headbox, and a web-forming porous traveling surface receiving the slurry from the headbox, the improvement comprising: said means for supplying the stock slurry comprising an elongated orifice discharging into the headbox; and means for feeding filamentous reinforcement comprising a nozzle discharging downstream within said orifice and thereby into the slurry stream so that the reinforcement will be carried in the slurry stream to the forming surface and the filamentous reinforcement will be integrally imbedded in the web.
Claim 13
Dependent Claim
28 words
Apparatus according to claim 10, including conveyor pipe means leading to the nozzle, and means for supplying a fluid carrier to the pipe together with the filamentous reinforcement.
Claim 14
Dependent Claim
14 words
Apparatus according to claim 10, wherein said feeding means nozzle comprises a venturi nozzle.
Claim 15
Dependent Claim
41 words
Apparatus according to claim 10, wherein said feeding means comprise a plurality of nozzles spaced laterally from one another and discharging into respective orifices discharging into said slurry stream at a plurality of points to feed individual filaments into the stream.
Claim 16
Dependent Claim
32 words
Apparatus according to claim 10, wherein said feeding means comprise a wide nozzle discharging into a complementary wide orifice to feed the filamentous reinforcement in the form of scrim into the stream.
Claim 17
Dependent Claim
56 words
Apparatus according to claim 10, including a header, means for supplying the fibrous stock slurry to the header, a manifold for receiving the slurry from the header and having said orifice providing a passage therethrough into the headbox, said nozzle being directed to feed the filamentous reinforcement into said passage intermediate the length of the orifice.
Claim 18
Dependent Claim
22 words
Apparatus according to claim 10, wherein the nozzle means is arranged to convey filamentous reinforcement and a fluid carrier into the orifice.
Claim 19
Dependent Claim
12 words
Apparatus according to claim 16, wherein said nozzle means has venturi geometry.
Claim 20
Dependent Claim
30 words
Apparatus according to claim 17, including a header having said orifice providing an elongated passage therein, said nozzle means discharging into said orifice means intermediate the length of said passage.
Claim 21
Dependent Claim
46 words
Apparatus according to claim 18, including conveyor pipe means in delivering relation to said nozzle means, a carrier fluid tank communicating with the pipe means and through which the filamentous reinforcement is supplied into the pipe means, and means for supplying carrier fluid to the tank.
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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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |