Patent US3908351A successfully refreshed from Google Patents.
US3908351A
Expired / Lapsed
US
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Novel tire cord forming process
Assignee: PPG Industries Inc
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Filing: 1973-12-27
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Granted: 1975-09-30
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Expires: 1993-12-27
Abstract
Abstract The process is described for preparing elastomer coated glass fiber cord for utilization as reinforcing material for elastomer reinforcement such as a reinforcement for tires. The glass fiber strands are prepared by coating them with a suitable elastomer formulation, rapidly drying the coated cord to remove moisture therefrom and subjecting the cord to a second drying step in which the cord coating is partially cured. The partially cured cord is then subjected to a twisting operation to place it on a collector with the twisting being carried out prior to complete cure of the cord coating. The collection of the cord is accomplished on a suitable collecting device, i.e., a twist frame where the cord is collected on a bobbin. The total cure of the cord is effected on the cord which has had the twist already applied thereto.
Inventors
- 👤 Thomas D Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:54
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/38; B29B; B29B15/00; B29B15/08; B29B15/10; B29B15/12; B29B15/122; B60; B60C; B60C9/00; B60C9/0028; B29D2030/383; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
IN A METHOD OF COATING GLASS FIBER STRAND TO PRODUCE AN ELASTOMERIC COATED GLASS FIBER SUITABLE FOR USE IN REINFORCING RUBBER PRODUCTS, THE STEPS COMPRISING INTRODUCING STRAND INTO A COATING ZONE CONTAINING THEREIN AN ELASTOMER COMPATIBLE FOR USE IN REINFORCING SUNTHETIC AND NATURAL RUBBERPRODUCTS, APPLYING TO THE GLASS FIBER STRAND DURING ITS PASSAGE THROUGH THE COATING ZONE SUFFICIENT ELASTOMERIC COATING TO PROVIDE ON THE GLASS FIBER SUFFICIENT ELASTOMER AFTER DRYING TO MAINTAIN A WEIGHT PERCENTAGE OF BETWEEN 18 TO 40 PER CENT BY WEIGHT ELASTOMER BASIS THE GLASS, PASSING THE COATED STRAND FROM THE COATING ZONE THROUGH A HIGH ENERGY ELECTRICAL DRYING ZONE TO REMOVE SUBSTANTIALLY ALL MOISTURE CONTAINED THEREIN, PASSING THE STRAND AFTER DRYING THROUGH A CURING ZONE OPERATED AT A TEMPERATURE SUFFICIENT TO SUBSTANTIALLY BUT NOT COMPLETELY CURE THE ELASTOMER CONTAINED ON THE SURFACE OF THE GLASS,
Claim 2
Dependent Claim
139 words
IN A METHOD OF COATING GLASS FIBER STRAND TO PRODUCE AN ELASTOMERIC COATED GLASS FIBER SUITABLE FOR USE IN REINFORCING RUBBER PRODUCTS, THE STEPS COMPRISING INTRODUCING STRAND INTO A COATING ZONE CONTAINING THEREIN AN ELASTOMER COMPATIBLE FOR USE IN REINFORCING SUNTHETIC AND NATURAL RUBBERPRODUCTS, APPLYING TO THE GLASS FIBER STRAND DURING ITS PASSAGE THROUGH THE COATING ZONE SUFFICIENT ELASTOMERIC COATING TO PROVIDE ON THE GLASS FIBER SUFFICIENT ELASTOMER AFTER DRYING TO MAINTAIN A WEIGHT PERCENTAGE OF BETWEEN 18 TO 40 PER CENT BY WEIGHT ELASTOMER BASIS THE GLASS, PASSING THE COATED STRAND FROM THE COATING ZONE THROUGH A HIGH ENERGY ELECTRICAL DRYING ZONE TO REMOVE SUBSTANTIALLY ALL MOISTURE CONTAINED THEREIN, PASSING THE STRAND AFTER DRYING THROUGH A CURING ZONE OPERATED AT A TEMPERATURE SUFFICIENT TO SUBSTANTIALLY BUT NOT COMPLETELY CURE THE ELASTOMER CONTAINED ON THE SURFACE OF THE GLASS,
Claim 3
Dependent Claim
20 words
The method of claim 1, wherein the temperature of the cord leaving the curing oven is between 320* to 340*F.
Claim 4
Dependent Claim
28 words
The method of claim 2, wherein twiSt is applied to the cord within 3 to 7 seconds from the time it emerges from the oven at said temperature.
Claim 5
Independent Claim
118 words
A method of preparing an improved rubber coated fiber glass tire cord comprising coating the glass strand with a rubber compound from an aqueous latex bath containing said compound, removing moisture from the coated strand by exposing the glass fibers to a high energy electrical drying source, passing the coated strand to a curing zone for a period of time and at a temperature such that substantial curing of the cord takes place, removing the strand from the curing zone before the surface of the strand is completely cured, applying a twist to the strand and collecting it on a bobbin within 15 seconds of its emergence from said curing zone and before the surface is completely cured.
Claim 6
Independent Claim
118 words
A method of preparing an improved rubber coated fiber glass tire cord comprising coating the glass strand with a rubber compound from an aqueous latex bath containing said compound, removing moisture from the coated strand by exposing the glass fibers to a high energy electrical drying source, passing the coated strand to a curing zone for a period of time and at a temperature such that substantial curing of the cord takes place, removing the strand from the curing zone before the surface of the strand is completely cured, applying a twist to the strand and collecting it on a bobbin within 15 seconds of its emergence from said curing zone and before the surface is completely cured.
Claim 7
Independent Claim
89 words
A method of preparing an improved elastomeric coated glass fiber strand comprising coating a glass fiber strand with an aqueous elastomeric latex composition, drying the glass fiber strand after coating in a high energy electrical field to remove substantially all free water present, subjecting the dried and coated glass fiber strand to temperature of between 320* to 410*F. for between 10 to 30 seconds in a curing zone, removing the strand from the zone and collecting it while applying a twist thereto before the strand surface has become non-tacky.
Claim 8
Independent Claim
89 words
A method of preparing an improved elastomeric coated glass fiber strand comprising coating a glass fiber strand with an aqueous elastomeric latex composition, drying the glass fiber strand after coating in a high energy electrical field to remove substantially all free water present, subjecting the dried and coated glass fiber strand to temperature of between 320* to 410*F. for between 10 to 30 seconds in a curing zone, removing the strand from the zone and collecting it while applying a twist thereto before the strand surface has become non-tacky.
Claim 9
Independent Claim
94 words
A method of preparing an elastomeric coated glass fiber strand comprising coating a glass fiber strand with an elastomeric latex to provide between 18 to 40 per cent by weight elastomer thereon basis the glass, removing substantially all moisture from cured coated strand, with high energy electrical drying, heating the coated strand after drying to temperature between 320* to 410*F. for between 10 to 30 seconds in a curing zone, removing the strand from the curing zone and twisting the strand and collecting it within 15 seconds of its removal from the curing zone.
Claim 10
Independent Claim
94 words
A method of preparing an elastomeric coated glass fiber strand comprising coating a glass fiber strand with an elastomeric latex to provide between 18 to 40 per cent by weight elastomer thereon basis the glass, removing substantially all moisture from cured coated strand, with high energy electrical drying, heating the coated strand after drying to temperature between 320* to 410*F. for between 10 to 30 seconds in a curing zone, removing the strand from the curing zone and twisting the strand and collecting it within 15 seconds of its removal from the curing zone.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |