US4423109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber reinforced rubber gasket material
Assignee: Rogers Corp
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Filing: 1981-10-02
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Granted: 1983-12-27
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Expires: 2001-10-02
Abstract
Abstract An improved fiber reinforced material for use in the manufacture of gaskets is produced by impregnating a nonwoven fabric with an aqueous dispersion of a rubber and filler. The water is then evaporated out of the impregnated fabric. The final product is formed by curing the rubber under heat and pressure.
Inventors
- 👤 Norman L. Greenman
- 👤 Richard C. Berry
- 👤 Douglas H. Tracy
- 👤 Bruce M. Arnio
- 👤 Michael S. Lunt
- 👤 Jeffrey B. Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:20
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/046; C08J5/045; C09; C09K; C09K3/00; C09K3/10; C09K3/1025; C09K3/1028; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; C08J2321/00; C09K2200/00; C09K2200/06; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2344
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
72 words
A fiber reinforced gasket material comprising: 70% to 90% by weight of a composition comprising: 10% to 80% elastomeric binder; 10% to 80% inorganic particulate filler; 2% to 20% compounding agents; and 10% to 30% by weight of a nonwoven fabric of organic fibers selected from the group consisting of cellulose, polyolefin, polyamide, polyimide, polyester and polyacrylic fibers; said fabric being impregnated with said composition to constitute a fiber reinforced gasket material.
Claim 2
Dependent Claim
72 words
A fiber reinforced gasket material comprising: 70% to 90% by weight of a composition comprising: 10% to 80% elastomeric binder; 10% to 80% inorganic particulate filler; 2% to 20% compounding agents; and 10% to 30% by weight of a nonwoven fabric of organic fibers selected from the group consisting of cellulose, polyolefin, polyamide, polyimide, polyester and polyacrylic fibers; said fabric being impregnated with said composition to constitute a fiber reinforced gasket material.
Claim 3
Dependent Claim
21 words
The gasket material of claim 1 wherein said elastomeric binder is selected from the group consisting of: natural and synthetic rubbers.
Claim 4
Dependent Claim
23 words
The gasket material of claim 1 wherein said elastomeric binder is selected from the group consisting of: chloroprene, nitrile, isoprene, and styrene-butadiene binders.
Claim 5
Dependent Claim
26 words
The gasket material of claim 1 wherein said inorganic particulate fillers are selected from the group consisting of: mica, silica, calcium carbonate, carbon black and clay.
Claim 6
Dependent Claim
58 words
A fiber reinforced gasket material comprising: 70% to 90% by weight of a composition comprising: 10% to 80% elastomeric binder; 10% to 80% inorganic particulate filler; 2% to 20% compounding agents; and 10% to 30% by weight of a nonwoven fabric of fiberglass fibers; said fabric being impregnated with said composition to constitute a fiber reinforced gasket material.
Claim 7
Dependent Claim
58 words
A fiber reinforced gasket material comprising: 70% to 90% by weight of a composition comprising: 10% to 80% elastomeric binder; 10% to 80% inorganic particulate filler; 2% to 20% compounding agents; and 10% to 30% by weight of a nonwoven fabric of fiberglass fibers; said fabric being impregnated with said composition to constitute a fiber reinforced gasket material.
Claim 8
Dependent Claim
21 words
The gasket material of claim 5 wherein said elastomeric binder is selected from the group consisting of: natural and synthetic rubbers.
Claim 9
Dependent Claim
23 words
The gasket material of claim 5 wherein said elastomeric binder is selected from the group consisting of: chloroprene, nitrile, isoprene, and styrene-butadiene binders.
Claim 10
Dependent Claim
26 words
The gasket material of claim 5 wherein said inorganic particulate fillers are selected from the group consisting of: mica, silica, calcium carbonate, carbon black and clay.
Claim 11
Independent Claim
87 words
A method of manufacturing a fiber reinforced gasket material comprising the steps of: saturating a nonwoven fabric formed from organic fibers with an aqueous dispersion of between 30% to 60% solids, said solids comprising: 10% to 80% elastomer binder; 10% to 80% inorganic particulate filler; and 2% to 20% compounding agents; removing said water from said saturated fabric by subjecting said saturated fabric to a sufficient amount of heat to remove said water but not degrade said solids; and applying heat and pressure to said saturated fabric.
Claim 12
Independent Claim
87 words
A method of manufacturing a fiber reinforced gasket material comprising the steps of: saturating a nonwoven fabric formed from organic fibers with an aqueous dispersion of between 30% to 60% solids, said solids comprising: 10% to 80% elastomer binder; 10% to 80% inorganic particulate filler; and 2% to 20% compounding agents; removing said water from said saturated fabric by subjecting said saturated fabric to a sufficient amount of heat to remove said water but not degrade said solids; and applying heat and pressure to said saturated fabric.
Claim 13
Dependent Claim
29 words
The method of claim 9 wherein: said fabric is a nonwoven fabric formed of fibers selected from the group consisting of: cellulose, polyolefin, polyamide, polyimide, polyester and polyacrylic fibers.
Claim 14
Dependent Claim
20 words
The method of claim 10 wherein: said elastomeric binder is selected from the group consisting of natural and synthetic rubbers.
Claim 15
Dependent Claim
22 words
The method of claim 10 wherein: said elastomeric binder is selected from the group consisting of: chloroprene, nitrile, isoprene, and styrene-butadiene binders.
Claim 16
Dependent Claim
24 words
The method of claim 10 wherein: said inorganic fillers are selected from the group consisting of: mica, silica, calcium carbonate, carbon black and clay.
Claim 17
Independent Claim
87 words
A method of manufacturing a fiber reinforced gasket material comprising the following steps: saturating a nonwoven fabric formed from inorganic fibers with an aqueous dispersion of between 30% to 60% solids, said solids comprising: 10% to 80% elastomer binder; 10% to 80% inorganic particulate filler; and 2% to 20% compounding agents; removing said water from said saturated fabric by subjecting said saturated fabric to a sufficient amount of heat to remove said water but not degrade said solids; and applying heat and pressure to said saturated fabric.
Claim 18
Independent Claim
87 words
A method of manufacturing a fiber reinforced gasket material comprising the following steps: saturating a nonwoven fabric formed from inorganic fibers with an aqueous dispersion of between 30% to 60% solids, said solids comprising: 10% to 80% elastomer binder; 10% to 80% inorganic particulate filler; and 2% to 20% compounding agents; removing said water from said saturated fabric by subjecting said saturated fabric to a sufficient amount of heat to remove said water but not degrade said solids; and applying heat and pressure to said saturated fabric.
Claim 19
Dependent Claim
14 words
The method of claim 14 wherein: said fabric is a nonwoven fabric of fiberglass.
Claim 20
Dependent Claim
20 words
The method of claim 15 wherein: said elastomeric binder is selected from the group consisting of natural and synthetic rubbers.
Claim 21
Dependent Claim
22 words
The method of claim 15 wherein: said elastomeric binder is selected from the group consisting of: chloroprene, nitrile, isoprene, and styrene-butadiene binders.
Claim 22
Dependent Claim
24 words
The method of claim 15 wherein: said inorganic fillers are selected from the group consisting of: mica, silica, calcium carbonate, carbon black and clay.
References Cited (Backward Citations)
US4234636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |