Patent US3978263A successfully refreshed from Google Patents.
US3978263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-permeable floor covering boards
Assignee: Verton and Wellensiek
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Filing: 1974-08-12
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Granted: 1976-08-31
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Expires: 1994-08-12
Abstract
Abstract Disclosed is a process for manufacturing elastic floor covering boards comprising a lower, water-permeable layer of natural or synthetic rubber particles bound together by an adhesive and a cover layer of non-woven synthetic textile fibers, which process comprises placing into a mold the cover layer of non-woven synthetic textile fibers, impregnating this layer with a resilient, heat-curable adhesive, placing the particles of natural or synthetic rubber which are likewise impregnated with said adhesive on top of the fibrous layer and subsequently compressing both layers in the mold at a temperature below 100°C. and at a pressure of from 40 to 100 metric tons per square meter until the adhesive is cured. Advantageously, a woven reinforcing layer is interposed between the two layers prior to molding to provide an exceptionally strong and stable product.
Inventors
- 👤 Gunther Wellensiek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:45
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/30; B32B37/00; B32B37/12; B32B38/00; B32B38/0004; B32B38/08; B32B5/16; D; D06; D06N; D06N3/00; D06N3/007; D06N3/0072; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2264/00; B32B2264/02; B32B2264/0207; B32B2307/00; B32B2307/50; B32B2307/51; B32B2307/70; B32B2307/726; B32B2307/7265; B32B2471/00; Y; Y10; Y10S; Y10S264/00; Y10S264/07; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1059; Y10T428/00; Y10T428/25; Y10T428/254; Y10T442/00; Y10T442/30; Y10T442/3325; Y10T442/335; Y10T442/3358; Y10T442/60; Y10T442/647; Y10T442/652; Y10T442/653
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
176 words
A process for producing in a single molding operation water-permeable, uniformly dimensioned elastic floor covering boards having a resilient, water-permeable backing layer of adhesively bonded rubber particles, and a water-permeable surface layer of adhesively bonded synthetic fibers, said layers being firmly bonded together, comprising the steps of a. depositing in a mold a layer of non-woven synthetic fibers, b. impregnating said layer of synthetic fibers with a resilient polyurethane adhesive, c. depositing on top of said layer of adhesive-impregnated synthetic fibers a layer of natural or synthetic rubber particles having a particle size of between 0.2 and 4.0 cm., said particles being impregnated with a resilient polyurethane adhesive, d. incorporating a foaming agent for said adhesive, e. closing said mold, and f. subjecting said layers in the closed mold to a temperature between room temperature and 100°C. and to a pressure between about 40 and about 100 metric tons per square meter for a period of time sufficient to effect curing of said adhesive, whereby a foamed adhesive matrix is produced in said floor covering boards.
Claim 2
Dependent Claim
176 words
A process for producing in a single molding operation water-permeable, uniformly dimensioned elastic floor covering boards having a resilient, water-permeable backing layer of adhesively bonded rubber particles, and a water-permeable surface layer of adhesively bonded synthetic fibers, said layers being firmly bonded together, comprising the steps of a. depositing in a mold a layer of non-woven synthetic fibers, b. impregnating said layer of synthetic fibers with a resilient polyurethane adhesive, c. depositing on top of said layer of adhesive-impregnated synthetic fibers a layer of natural or synthetic rubber particles having a particle size of between 0.2 and 4.0 cm., said particles being impregnated with a resilient polyurethane adhesive, d. incorporating a foaming agent for said adhesive, e. closing said mold, and f. subjecting said layers in the closed mold to a temperature between room temperature and 100°C. and to a pressure between about 40 and about 100 metric tons per square meter for a period of time sufficient to effect curing of said adhesive, whereby a foamed adhesive matrix is produced in said floor covering boards.
Claim 3
Dependent Claim
24 words
The process as defined by claim 1, wherein said layer of non-woven synthetic fibers is a pre-formed web or felt of said synthetic fibers.
Claim 4
Dependent Claim
22 words
The process as defined by claim 1, wherein said layer of non-woven synthetic fibers comprises a loose layer of felt-forming synthetic fibers.
Claim 5
Dependent Claim
24 words
The process as defined by claim 1, wherein said synthetic fibers are selected from the group consisting of polyamide, polyester, polyacrylonitrile and polyolefin fibers.
Claim 6
Dependent Claim
13 words
The process as defined by claim 1, wherein said foaming agent comprises water.
Claim 7
Dependent Claim
30 words
The process as defined by claim 1, further comprising the step of placing on top of said adhesive-impregnated layer of synthetic fibers a reinforcing layer comprising a woven fiber web.
Claim 8
Dependent Claim
18 words
The process as defined by claim 6, wherein said reinforcing layer comprises a web of woven glass fibers.
Claim 9
Dependent Claim
34 words
The process as defined by claim 1, further comprising the step of providing a plurality of spaced drainage apertures in the resilient backing layer of adhesively bonded rubber particles concurrently with said molding step.
Claim 10
Dependent Claim
41 words
A water-permeable, elastic floor covering board having a resilient, water-permeable backing layer of adhesively bonded rubber particles and a water-permeable surface layer of adhesively bonded synthetic fibers, said floor covering board having been produced by the process defined by claim 1.
Claim 11
Dependent Claim
41 words
A water-permeable, elastic floor covering board having a resilient, water-permeable backing layer of adhesively bonded rubber particles and a water-permeable surface layer of adhesively bonded synthetic fibers, said floor covering board having been produced by the process defined by claim 6.
Claim 12
Dependent Claim
267 words
A process for producing in a single molding operation water-permeable, uniformly dimensioned elastic floor covering boards having a resilient, water-permeable backing layer of adhesively bonded rubber particles, and a water-permeable surface layer of adhesively bonded synthetic fibers, said layers being firmly bonded together, comprising the steps of a. depositing in a mold a layer of non-woven synthetic fibers, b. impregnating said layer of synthetic fibers with a resilient polyurethane adhesive, c. depositing on top of said layer of adhesive-impregnated synthetic fibers a layer of natural or synthetic rubber particles having a particle size of between 0.2 and 4.0 cm., said particles being impregnated with a resilient polyurethane adhesive, c 1 . depositing on top of said layer of impregnated rubber particles a third layer comprising a layer of non-woven synthetic textile fibers, c 2 . impregnating said third layer with a resilient polyurethane adhesive, d. incorporating a foaming agent for said adhesive, e. closing said mold, f. subjecting said layers in the closed mold to a temperature between room temperature and 100°C. and to a pressure between about 40 and about 100 metric tons per square meter for a period of time sufficient to effect curing of said adhesive, whereby a foamed adhesive matrix is produced in said floor covering boards, and g. cutting the resulting layer structure through and in the plane of the layer of adhesively bonded rubber particles parallel to the principal exterior surfaces of the board structure, whereby there is produced two floor covering boards, each having a covering layer of non-woven fibers and a water-permeable backing layer of adhesively bonded rubber particles.
Claim 13
Dependent Claim
267 words
A process for producing in a single molding operation water-permeable, uniformly dimensioned elastic floor covering boards having a resilient, water-permeable backing layer of adhesively bonded rubber particles, and a water-permeable surface layer of adhesively bonded synthetic fibers, said layers being firmly bonded together, comprising the steps of a. depositing in a mold a layer of non-woven synthetic fibers, b. impregnating said layer of synthetic fibers with a resilient polyurethane adhesive, c. depositing on top of said layer of adhesive-impregnated synthetic fibers a layer of natural or synthetic rubber particles having a particle size of between 0.2 and 4.0 cm., said particles being impregnated with a resilient polyurethane adhesive, c 1 . depositing on top of said layer of impregnated rubber particles a third layer comprising a layer of non-woven synthetic textile fibers, c 2 . impregnating said third layer with a resilient polyurethane adhesive, d. incorporating a foaming agent for said adhesive, e. closing said mold, f. subjecting said layers in the closed mold to a temperature between room temperature and 100°C. and to a pressure between about 40 and about 100 metric tons per square meter for a period of time sufficient to effect curing of said adhesive, whereby a foamed adhesive matrix is produced in said floor covering boards, and g. cutting the resulting layer structure through and in the plane of the layer of adhesively bonded rubber particles parallel to the principal exterior surfaces of the board structure, whereby there is produced two floor covering boards, each having a covering layer of non-woven fibers and a water-permeable backing layer of adhesively bonded rubber particles.
Claim 14
Dependent Claim
313 words
A process for producing in a single molding operation water-permeable, uniformly dimensioned elastic floor covering boards having a resilient, water-permeable backing layer of adhesively bonded rubber particles, and a water-permeable surface layer of adhesively bonded synthetic fibers, said layers being firmly bonded together, comprising the steps of a. depositing in a mold a layer of non-woven synthetic fibers, b. impregnating said layer of synthetic fibers with a resilient polyurethane adhesive, b 1 . placing on top of said adhesive-impregnated layer of synthetic fibers a reinforcing layer comprising a woven fiber web, c. depositing on top of said layer of woven fiber web a layer of natural or synthetic rubber particles having a particle size of between 0.2 and 4.0 cm., said particles being impregnated with a resilient polyurethane adhesive, c 1 . depositing on top of said layer of impregnated rubber particles a second reinforcing layer comprising a woven fiber web, c 2 . depositing on top of said second reinforcing layer a fifth layer comprising a layer of non-woven synthetic textile fibers, c 3 . impregnating said fifth layer with a resilient polyurethane adhesive, d. incorporating a foaming agent for said adhesive, e. closing said mold, f. subjecting said layers in the closed mold to a temperature between room temperature and 100°C. and to a pressure between about 40 and about 100 metric tons per square meter for a period of time sufficient to effect curing of said adhesive, whereby a formed adhesive matrix is produced in said floor covering boards, and g. cutting the resulting five-layer structure through and in the plane of the layer of adhesively bonded rubber particles parallel to the principle exterior surfaces of the board structure, whereby there is produced two floor covering boards, each having a covering layer of non-woven fibers, a woven web reinforcing layer and a water-permeable backing layer of adhesively bonded rubber particles.
Claim 15
Dependent Claim
313 words
A process for producing in a single molding operation water-permeable, uniformly dimensioned elastic floor covering boards having a resilient, water-permeable backing layer of adhesively bonded rubber particles, and a water-permeable surface layer of adhesively bonded synthetic fibers, said layers being firmly bonded together, comprising the steps of a. depositing in a mold a layer of non-woven synthetic fibers, b. impregnating said layer of synthetic fibers with a resilient polyurethane adhesive, b 1 . placing on top of said adhesive-impregnated layer of synthetic fibers a reinforcing layer comprising a woven fiber web, c. depositing on top of said layer of woven fiber web a layer of natural or synthetic rubber particles having a particle size of between 0.2 and 4.0 cm., said particles being impregnated with a resilient polyurethane adhesive, c 1 . depositing on top of said layer of impregnated rubber particles a second reinforcing layer comprising a woven fiber web, c 2 . depositing on top of said second reinforcing layer a fifth layer comprising a layer of non-woven synthetic textile fibers, c 3 . impregnating said fifth layer with a resilient polyurethane adhesive, d. incorporating a foaming agent for said adhesive, e. closing said mold, f. subjecting said layers in the closed mold to a temperature between room temperature and 100°C. and to a pressure between about 40 and about 100 metric tons per square meter for a period of time sufficient to effect curing of said adhesive, whereby a formed adhesive matrix is produced in said floor covering boards, and g. cutting the resulting five-layer structure through and in the plane of the layer of adhesively bonded rubber particles parallel to the principle exterior surfaces of the board structure, whereby there is produced two floor covering boards, each having a covering layer of non-woven fibers, a woven web reinforcing layer and a water-permeable backing layer of adhesively bonded rubber particles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |