Patent US3769115A successfully refreshed from Google Patents.
US3769115A
Expired / Lapsed
US
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Method for the production of a fibrous sheet material
Assignee: KONGEVEJ K
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Filing: 1968-11-14
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Granted: 1973-10-30
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Expires: 1988-11-14
Abstract
Abstract A method for the production of a fibrous sheet material by passing a stream of gas containing suspended fibres through a gaspermeable forming surface to form a fibrous layer thereon and bonding the fibres to each other or to a reinforcing material by means of a foamed binder.
Inventors
- 👤 T Rasmussen
- 👤 K Ottosen
- 👤 T Persson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:43
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/498; B32B37/00; B32B37/12; B32B37/1284; B32B37/1292; D04H1/58; D04H1/64; D04H1/68
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
A method of making a fibrous sheet material consisting of a reinforcing net material and at least one layer of short fibers bonded to one another and to the reinforcing net material, the method comprising the steps of directing a stream of gas containing suspended fibers toward a forming surface having apertures therein, allowing the gas to pass therethrough but retaining the major portion of the fibers so as to form on the side of the forming surface to which the fiber-containing gas stream is supplied, a layer of haphazardly located fibers, supplying a foamed binder to at least one side of the reinforcing net, and directing the fibrous layer on to the one side of the reinforcing net.
Claim 2
Independent Claim
119 words
A method of making a fibrous sheet material consisting of a reinforcing net material and at least one layer of short fibers bonded to one another and to the reinforcing net material, the method comprising the steps of directing a stream of gas containing suspended fibers toward a forming surface having apertures therein, allowing the gas to pass therethrough but retaining the major portion of the fibers so as to form on the side of the forming surface to which the fiber-containing gas stream is supplied, a layer of haphazardly located fibers, supplying a foamed binder to at least one side of the reinforcing net, and directing the fibrous layer on to the one side of the reinforcing net.
Claim 3
Dependent Claim
17 words
A method according to claim 1, in which said foamed binder is rolled into the fibrous layer.
Claim 4
Dependent Claim
37 words
A method as in claim 1, wherein said binder is applied onto both sides of said forming surface, that fibrous layers are subsequently applied to said reinforcing net and that the composite product thus formed is compressed.
Claim 5
Dependent Claim
40 words
A method as in claim 3, in which the composite material is compressed by passing through slots in the top and the bottom of a closed compartment in which air streams are directed against the composite material from both sides.
References Cited (Backward Citations)
US2527501A
Cited
US3206343A
Cited
US3201499A
Cited
US3158668A
Cited
US3352739A
Cited
US3145446A
Cited
US3275496A
Cited
US3462326A
Cited
US3513046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |