US4265703A
Expired / Lapsed
US
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Method of preparing a fibrous structure containing metallic fibers
Assignee: ArjoWiggins SAS
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Filing: 1979-05-15
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Granted: 1981-05-05
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Expires: 1999-05-15
Abstract
Abstract This invention relates to a fibrous structure containing metallic fibers, said fibrous structure being characterized in that the fibers which constitute said fibrous structure have been deposited by wet process, and in that the metallic fibers which said fibrous structure contains possess at their surface traces of a hydrosoluble binder, which has served initially for coating said metallic fibers. This invention relates also to the method of preparing said fibrous structure and also to its application, notably in the production of security papers, metallic filtering elements and elements for protection against electromagnetic waves.
Inventors
- 👤 Jacques Terliska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:16
CPC Classifications
D; D21; D21H; D21H23/00; D21H23/02; D21H23/22; D21H23/46; D21H23/48; D21H21/00; D21H21/14; D21H21/40; H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/009
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
A method for the preparation of a fibrous structure comprising metallic fibers by the use of papermaking techniques, said method comprising the steps of: (a) preparing agglomerates of metallic fibers and a hydrosoluble binding agent by coating said fibers with said binder by: (i) subjecting a bundle of metallic fibers to a bath of the hydrosoluble binding agent to produce a coated bundle, (ii) drying said coated bundle, and (iii) cutting the coated bundle to produce said agglomerates comprising metallic fibers having a length less than or equal to about 10 mm, wherein said metallic fibers having a mean diameter less than or equal to about 30 microns, and said hydrosoluble binding agent is selected from the group consisting of polyvinyl alcohol and starch; (b) preparing a homogeneous aqueous dispersion by mixing said agglomerates with non-metallic fibers and water to uniformly disperse said agglomerates into fibers; and (c) forming a fibrous structure in the form of a sheet by wet papermaking process from said aqueous dispersion.
Claim 2
Independent Claim
166 words
A method for the preparation of a fibrous structure comprising metallic fibers by the use of papermaking techniques, said method comprising the steps of: (a) preparing agglomerates of metallic fibers and a hydrosoluble binding agent by coating said fibers with said binder by: (i) subjecting a bundle of metallic fibers to a bath of the hydrosoluble binding agent to produce a coated bundle, (ii) drying said coated bundle, and (iii) cutting the coated bundle to produce said agglomerates comprising metallic fibers having a length less than or equal to about 10 mm, wherein said metallic fibers having a mean diameter less than or equal to about 30 microns, and said hydrosoluble binding agent is selected from the group consisting of polyvinyl alcohol and starch; (b) preparing a homogeneous aqueous dispersion by mixing said agglomerates with non-metallic fibers and water to uniformly disperse said agglomerates into fibers; and (c) forming a fibrous structure in the form of a sheet by wet papermaking process from said aqueous dispersion.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein the duration of step (b) is between 15 and 30 minutes.
Claim 4
Dependent Claim
16 words
The method of claim 1, wherein the non-metallic fibers of step (b) comprise polyvinyl alcohol fibers.
Claim 5
Dependent Claim
15 words
The method of claim 1, wherein the non-metallic fibers of step (b) comprise cellulose fibers.
References Cited (Backward Citations)
US3067087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |