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US4059468A
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Method of manufacture of parts of three-dimensional fabrics
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1977-02-01
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Granted: 1977-11-22
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Expires: 1997-02-01
Abstract
Abstract A stack formed by layers of bidimensional fabrics or layers of parallel threads extending alternately from one layer to the next in a first direction and a second direction is sewn in parallel lines by means of a thread which extends in a third direction. The layers are stacked on a support of pyrolyzable material, the stack and the support being sewn by means of the thread which extends in the third direction. The assembly thus obtained is subjected to a temperature between 800° C and 1200° C in a stream of gaseous hydrocarbon in order to pyrolyze the material which constitutes the support and to deposit pyrolytic carbon on the threads which form the three-dimensional fabric.
Inventors
- 👤 Bernard Bouillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:32
CPC Classifications
D; D03; D03D; D03D25/00; D03D25/005; B; B32; B32B; B32B5/00; B32B5/02; B32B5/12; B32B21/00; B32B21/10; B32B29/00; B32B29/02; B32B5/22; B32B5/24; B32B5/26; D04; D04H; D04H3/00; D04H3/02; D04H3/07; D04H3/08; D04H3/10; D04H3/115; D04H5/00; D04H5/08; D04H5/10; B32B2317/00; B32B2317/12; B32B2317/16; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/24; Y10T428/24033; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
152 words
A method of manufacture of parts of three-dimensional fabrics of the type which consists in successively stacking layers of bidimensional fabrics or layers of parallel threads extending alternately from one layer to the next in a first direction and in a second direction, and sewing the stack thus formed in parallel lines by means of a thread which extends in a third direction, wherein said layers are stacked on a support of pyrolyzable material, wherein the stack of said layers and said support are sewn by means of the thread which extends in the third direction and wherein the assembly thus obtained is subjected to a temperature within the range of 800° C to 1200° C in the presence of a stream of gaseous hydrocarbon in order to pyrolyze the material which constitutes said support and in order to deposit pyrolytic graphite or carbon on the threads which form said three-dimensional fabric.
Claim 2
Independent Claim
152 words
A method of manufacture of parts of three-dimensional fabrics of the type which consists in successively stacking layers of bidimensional fabrics or layers of parallel threads extending alternately from one layer to the next in a first direction and in a second direction, and sewing the stack thus formed in parallel lines by means of a thread which extends in a third direction, wherein said layers are stacked on a support of pyrolyzable material, wherein the stack of said layers and said support are sewn by means of the thread which extends in the third direction and wherein the assembly thus obtained is subjected to a temperature within the range of 800° C to 1200° C in the presence of a stream of gaseous hydrocarbon in order to pyrolyze the material which constitutes said support and in order to deposit pyrolytic graphite or carbon on the threads which form said three-dimensional fabric.
Claim 3
Dependent Claim
20 words
A method according to claim 1, wherein the pyrolyzable material is selected from the group comprising paperboard and balsa wood.
Claim 4
Dependent Claim
68 words
A method according to claim 1, wherein sewing of the stack of layers and of the support is effected by the thread which extends in the third direction with a lockstitch formed by means of an auxiliary shuttle thread and wherein the tension of the two threads is adjusted so as to ensure that the knot between the two threads is formed within the thickness of said support.
Claim 5
Dependent Claim
19 words
A method according to claim 1, wherein the gaseous hydrocarbon is selected from the group comprising methane and propane.
Claim 6
Dependent Claim
39 words
A method according to claim 1, wherein the support comprises a graphite core surrounded by pyrolyzable material and wherein said graphite core is extracted after the assembly has been subjected to a sufficiently high temperature to pyrolyze said material.
Claim 7
Dependent Claim
28 words
A method accordng to claim 1, wherein the threads of the fabric are selected from the group consisting of carbon threads, graphite threads, glass threads and silica threads.
Claim 8
Dependent Claim
15 words
A method according to claim 6, wherein the threads of the fabric are twisted threads.
Claim 9
Dependent Claim
26 words
A method according to claim 3, wherein the auxiliary shuttle thread is a thread of pyrolyzable material selected from the group consisting of rayon and cotton.
References Cited (Backward Citations)
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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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |