US3917501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven fabric-like rubbery material and process of manufacture
Assignee: JP Stevens and Co Inc
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Filing: 1973-07-27
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Granted: 1975-11-04
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Expires: 1993-07-27
Abstract
Abstract A non-woven, fabric-like material is produced by forming a blend of uncured natural or synthetic rubber, natural or synthetic powdery fibers, and curing agents, calendering the blend to form a sheet, distributing the powdery fibers over at least one surface of the sheet while the sheet is at an elevated temperature so as to adhere the fibers to the surface, and curing. The amount of powdery fibers in and on the sheet is such as to impart the feel of fabric to the sheet without substantially reducing the flexibility and strength of the rubber in the sheet.
Inventors
- 👤 Lorenzo A Ferrucci
- 👤 Whitney J R Hauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:57
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; B; B29; B29C; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/45; B29C66/70; B29C66/71; D; D04; D04H; D04H11/00; B29K; B29K2021/00; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0809; C08K; C08K7/00; C08K7/02; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23943; Y10T428/249921; Y10T428/249924; Y10T428/249933; Y10T428/25; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
A PROCESS FOR PRODUCING A NON-WOVEN, FABRIC-LIKE MATERIAL, COMPRISING: A. FORMING A UNIFORM BLEND OF UNCURED NATURAL OR SYNTHETIC RUBBER, NATURAL OR SYNTHETIC POWDERY FIBRES HAVING LENGHTS AVERAGING FROM ABOUT 0.004MM. TO ABOUT 1.5MM., AND DIAMETERS AVERAGING FROM ABOUT 2 MICRONS TO ABOUT 40 MICRONS AND ONE OR MORE CURING AGENTS, B. CALENDERING SAID BLEND TO FORM A UNIFORM, FLEXIBLE, SUBSTANTIALLY NON-POROUS SHEET, C. DISTRINUTING ADDITIONAL NATURAL OR SYNTHETIC POWDERY FIBERS OVER AT LEAST ONE SURFACE OF SAID SHEET WHILE SAID SHEET IS AT AN ELEVATED TEMPERATURE SO AS TO ADHERE SAID FIBERS TO SAID SURFACE, AND D. CURING SAID SHEET, THE TOTAL AMOUNT OF SAID FIBERS BEING FROM ABOUT 0.5% TO ABOUT 10% BY WEIGHT OF THE MATERIAL AND THE BLENDED AND ADDED
Claim 2
Dependent Claim
124 words
A PROCESS FOR PRODUCING A NON-WOVEN, FABRIC-LIKE MATERIAL, COMPRISING: A. FORMING A UNIFORM BLEND OF UNCURED NATURAL OR SYNTHETIC RUBBER, NATURAL OR SYNTHETIC POWDERY FIBRES HAVING LENGHTS AVERAGING FROM ABOUT 0.004MM. TO ABOUT 1.5MM., AND DIAMETERS AVERAGING FROM ABOUT 2 MICRONS TO ABOUT 40 MICRONS AND ONE OR MORE CURING AGENTS, B. CALENDERING SAID BLEND TO FORM A UNIFORM, FLEXIBLE, SUBSTANTIALLY NON-POROUS SHEET, C. DISTRINUTING ADDITIONAL NATURAL OR SYNTHETIC POWDERY FIBERS OVER AT LEAST ONE SURFACE OF SAID SHEET WHILE SAID SHEET IS AT AN ELEVATED TEMPERATURE SO AS TO ADHERE SAID FIBERS TO SAID SURFACE, AND D. CURING SAID SHEET, THE TOTAL AMOUNT OF SAID FIBERS BEING FROM ABOUT 0.5% TO ABOUT 10% BY WEIGHT OF THE MATERIAL AND THE BLENDED AND ADDED
Claim 3
Dependent Claim
26 words
A process as in claim 1 wherein, prior to step (b), an admixture of said rubber and said fibers is formed and said admixture is aged.
Claim 4
Dependent Claim
20 words
A process as in claim 1 wherein, in step (c), said fibers are distributed over both surfaces of said sheet.
Claim 5
Dependent Claim
18 words
A process as in claim 1 wherein said rubber is natural rubber and said fibers arE natural fibers.
Claim 6
Dependent Claim
11 words
A process as in claim 4 wherein said fibers are cotton.
Claim 7
Dependent Claim
35 words
A process as in claim 1 wherein said rubber is natural rubber, and said fibers are cotton, wool, silk, nylon, rayon, polyester, acetate, acrylic, modacrylic, olefin, or blends of two or more of said fibers.
Claim 8
Dependent Claim
37 words
A PROCESS AS IN CLAIM 1 WHEREIN (B), SAID BLEND IS CALENDERED TO FORM A PLURALITY OF PLIES, AND SAID PLIES ARE LAMINATED TO FORM A SINGLE SAID SHEET PRIOR TO DISTRIBUTION OF SAID POWDERY FIBERS THEREON.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |