Patent US4857244A successfully refreshed from Google Patents.
US4857244A
Expired / Lapsed
US
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Process of making a composite product, especially a vehicle tire
Assignee: Pradom Ltd
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Filing: 1987-03-19
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Granted: 1989-08-15
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Expires: 2007-03-19
Abstract
Abstract The present invention relates to a process for the preparation of a composite material wherein the element used to reinforce the composite material is subjected to an electrostatic field induced by a high voltage electric current, said element being then impregnated with a liquid matrix material or precursor of matrix, while still under the influence of said field, and to the composite materials obtained by carrying out said process, notably vulcanized products, in particular vehicle tires, ceramics and electrodes.
Inventors
- 👤 Michel Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:18
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; B29C70/14; B29B; B29B15/00; B29B15/08; B29C70/16; B29C70/20; B29D; B29D30/00; B29D30/06; B29D30/38; C; C04; C04B; C04B20/00; C04B20/0048; C04B20/02; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/117; C04B35/48; C04B35/481; C04B35/71; C04B35/78; C04B35/80; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/24; C08J5/248; H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; H01M4/28; H01M4/29; H01M4/64; H01M4/70; H01M4/80; H01M4/86; H01M4/96; B29B15/10; B29C35/00; B29C35/02; B29C35/04; B29C35/045; C04B2235/00; C04B2235/02; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/522; C04B2235/5224; C04B2235/524; C04B2235/5244; C04B2235/5248; C04B2235/526; C04B2235/60; C04B2235/606; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/6567; C04B2235/658; C04B2235/6582; C04B2235/70; C04B2235/96; C04B2235/9646; C04B2235/9661; C08J2375/00; C08J2375/04; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
101 words
A process for the manufacturer of a vulcanized composite material having improved mechanical and wear properties, the composite material having reinforcing fibers that reinforce a vulcanizable matrix, comprising the steps of: subjecting the fibers in a dry state to an electrostatic field that is induced by a high-voltage electric current to prepare the fibers to be impregnated; impregnating said fibers with a vulcanizable liquid matrix or precursor of a vulcanizable matrix while still under the effect of said electrostatic field thereby consolidating bonding between the fibers and the matrix; and vulcanizing the impregnated fibers/matrix composite, thereby obtaining said vulcanized composite material.
Claim 2
Dependent Claim
101 words
A process for the manufacturer of a vulcanized composite material having improved mechanical and wear properties, the composite material having reinforcing fibers that reinforce a vulcanizable matrix, comprising the steps of: subjecting the fibers in a dry state to an electrostatic field that is induced by a high-voltage electric current to prepare the fibers to be impregnated; impregnating said fibers with a vulcanizable liquid matrix or precursor of a vulcanizable matrix while still under the effect of said electrostatic field thereby consolidating bonding between the fibers and the matrix; and vulcanizing the impregnated fibers/matrix composite, thereby obtaining said vulcanized composite material.
Claim 3
Dependent Claim
24 words
The process of claim 1, wherein said electrostatic field includes time sequential first and second fields that are induced by high voltage electric currents.
Claim 4
Dependent Claim
31 words
The process of claim 2, wherein one of said fields is induced by an A.C. electric current an where the other of said fields is induced by a D.C. electric current.
Claim 5
Dependent Claim
30 words
The process of claim 1, wherein the first of said fields is induced by D.C. electric current and the second one of said fields is induced by A.C. electric current.
Claim 6
Dependent Claim
29 words
The process of claim 1, further including the step of shaping the impregnated fibers/matrix composite into a vehicle tire to obtain a vehicle tire as the vulcanized composite material.
Claim 7
Dependent Claim
26 words
The process of claim 1, wherein the fibers used as reinforcing elements are selected from the group consisting of polyamide fibers, plant fibers and glass fibers.
Claim 8
Dependent Claim
28 words
The process of claim 1, wherein the matrix is selected from the group consisting of polyurethane elastomer, natural rubber, synthetic rubber, rhodorsil, silicon, thermoplastic elastomer, and mixtures thereof.
Claim 9
Dependent Claim
28 words
The process of claim 6, wherein the matrix is selected from the group consisting of polyurethane elastomer, natural rubber, synthetic rubber, rhodorsil, silicon, thermoplastic elastomer, and mixtures thereof.
Claim 10
Dependent Claim
39 words
The process of claim 1, wherein woven (aramid) fibers as reinforcing fibers are used with polyurethane elastomer as matrix, the relative proportion being about 40% by weight of woven (aramid) fibers with about 60% by weight of polyurethane elastomer.
Claim 11
Dependent Claim
29 words
The process of claim 4 wherein the D.C. electric current is about 40,000 V D.C. electric current and wherein the A.C. electric current is about 20,000 V electric current.
Claim 12
Dependent Claim
31 words
The process of claim 1, wherein the D.C. electric current is about a 100,000 V D.C. electric current and wherein the A.C. electric current is about a 25,000 V electric current.
Claim 13
Dependent Claim
13 words
The process of claim 1, wherein said fibers are of a dielectric material.
Claim 14
Dependent Claim
28 words
The process of claim 12, wherein said dielectric material is selected from the group consisting of polyamide fibers, glass fibers, metallic oxide fibers, carbon fibers and mixtures thereof.
Claim 15
Dependent Claim
110 words
A process for the manufacturer of a composite material usable as a vehicle tire having improved mechanical and wear properties, the composite material having tire reinforcing fibers that reinforce a tire matrix, comprising the steps of: subjecting the fibers in a dry state to an electrostatic field that is induced by a high-voltage electric current to prepare the fibers to be impregnated; impregnating said fibers with a liquid matrix or precursor of a matrix while still under the effect of said electrostatic field thereby consolidating bonding between the fibers and the matrix; and vulcanizing the impregnated fibers/matrix composite, so that the resulting vulcanized material is usable as a vehicle tire.
Claim 16
Dependent Claim
110 words
A process for the manufacturer of a composite material usable as a vehicle tire having improved mechanical and wear properties, the composite material having tire reinforcing fibers that reinforce a tire matrix, comprising the steps of: subjecting the fibers in a dry state to an electrostatic field that is induced by a high-voltage electric current to prepare the fibers to be impregnated; impregnating said fibers with a liquid matrix or precursor of a matrix while still under the effect of said electrostatic field thereby consolidating bonding between the fibers and the matrix; and vulcanizing the impregnated fibers/matrix composite, so that the resulting vulcanized material is usable as a vehicle tire.
Claim 17
Dependent Claim
24 words
The process of claim 14, wherein said electrostatic field includes time sequential first and second fields that are induced by high voltage electric currents.
Claim 18
Dependent Claim
31 words
The process of claim 15, wherein one of said fields is induced by an A.C. electric current and where the other of said fields is induced by a D.C. electric current.
Claim 19
Dependent Claim
30 words
The process of claim 14, wherein the first of said fields is induced by D.C. electric current and the second one of said fields is induced by A.C. electric current.
Claim 20
Dependent Claim
19 words
The process of claim 14, further including the step of shaping the impregnated fibers/matrix composite into a vehicle tire.
Claim 21
Dependent Claim
26 words
The process of claim 14, wherein the fibers used as reinforcing elements are selected from the group consisting of polyamide fibers, plant fibers and glass fibers.
Claim 22
Dependent Claim
28 words
The process of claim 14, wherein the matrix is selected from the group consisting of polyurethane elastomer, natural rubber, synthetic rubber, rhodorsil, silicon, thermoplastic elastomer, and mixtures thereof.
Claim 23
Dependent Claim
28 words
The process of claim 19, wherein the matrix is selected from the group consisting of polyurethane elastomer, natural rubber, synthetic rubber, rhodorsil, silicon, thermoplastic elastomer, and mixtures thereof.
Claim 24
Dependent Claim
39 words
The process of claim 14, wherein woven (aramid) fibers as reinforcing fibers are used with polyurethane elastomer as matrix, the relative proportion being about 40% by weight of woven (aramid) fibers with about 60% by weight of polyurethane elastomer.
Claim 25
Dependent Claim
29 words
The process of claim 17, wherein the D.C. electric current is about 40,000 V D.C. electric current and wherein the A.C. electric current is about 20,000 V electric current.
Claim 26
Dependent Claim
31 words
The process of claim 17, wherein the D.C. electric current is about a 100,000 V D.C. electric current and wherein the A.C. electric current is about a 25,000 V electric current.
Claim 27
Dependent Claim
13 words
The process of claim 14, wherein said fibers are of a dielectric material.
Claim 28
Dependent Claim
28 words
The process of claim 25, wherein said dielectric material is selected from the group consisting of polyamide fibers, glass fibers, metallic oxide fibers, carbon fibers and mixtures thereof.
References Cited (Backward Citations)
SU357301A1
Cited
GB816285A
Cited
US3073732A
Cited
US3497419A
Cited
US3626041A
Cited
FR2096585A1
Cited
US3837986A
Cited
US3745104A
Cited
US3767505A
Cited
NL7214367A
Cited
US3919437A
Cited
US4298562A
Cited
FR2379323A1
Cited
US4328324A
Cited
US4257836A
Cited
DE3127017A1
Cited
FR2529215A1
Cited
US4519432A
Cited
US4707231A
Cited
JPH0529939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |