Patent US3891740A successfully refreshed from Google Patents.
US3891740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming an injection molded tire using molded reinforcing plies
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1972-05-05
•
Granted: 1975-06-24
•
Expires: 1992-05-05
Abstract
Abstract A method of forming a ply by injection molding a fluid material such as polyester or polyamide and congealing to form a ply or plies, placing said plies in a mold and injecting in a fluid precursor material which when cured yields a tire having ply reinforcement.
Inventors
- 👤 Jr Frederick F Vannan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:27
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/02; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/33; B29D; B29D30/00; B29D30/06; B29D30/0678; B29K; B29K2021/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A METHOD OF BUILDING A TIRE CONSISTING ESSENTIALLY OF MOLDING A PLY OF THE DESIRED ANGLE, PLACING AT LEAST ONE PLY IN A TIRE MOLD IN THE DESIRED SPACE RELATIONSHIP RELATIVE TO THE TIRE MOLD AND ANY OTHER PLY PRESENT IN THE MOLD TO LEAVE A SPACE BETWEEN THE OTHER PLY AND THE TIRE MOLD WHEN CLOSED AND POSITIONING A HEAD PORITION OF SAID ONE PLY IN A CORRESPONDING RECESS OF SAID SECOND PLY TO LOCK THE PLIES TOGETHER, FILLING SAI SPACE WITH AN ELASTOMERIC PRECURSOR AND HEATING TO SET THE PRECURSOR AROUND EACH PLY TO GIVE A CURED TIRE WHEN REMOVED FROM THE TIRE MOLD.
Claim 2
Independent Claim
106 words
A METHOD OF BUILDING A TIRE CONSISTING ESSENTIALLY OF MOLDING A PLY OF THE DESIRED ANGLE, PLACING AT LEAST ONE PLY IN A TIRE MOLD IN THE DESIRED SPACE RELATIONSHIP RELATIVE TO THE TIRE MOLD AND ANY OTHER PLY PRESENT IN THE MOLD TO LEAVE A SPACE BETWEEN THE OTHER PLY AND THE TIRE MOLD WHEN CLOSED AND POSITIONING A HEAD PORITION OF SAID ONE PLY IN A CORRESPONDING RECESS OF SAID SECOND PLY TO LOCK THE PLIES TOGETHER, FILLING SAI SPACE WITH AN ELASTOMERIC PRECURSOR AND HEATING TO SET THE PRECURSOR AROUND EACH PLY TO GIVE A CURED TIRE WHEN REMOVED FROM THE TIRE MOLD.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein the plies are formed from molten polyamide or polyester.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein the ply is molded from a mixture of a liquid lactam, catalyst and promoter.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein each ply is composed of multiple filaments formed at the desired angle.
Claim 6
Dependent Claim
25 words
The method of claim 1 wherein the plies are formed from molten polyamide and the elastomeric precursor is an encapsulated rubber dispersed in a plasticizer.
Claim 7
Dependent Claim
12 words
The method of claim 5 wherein the elastomeric precursor is a polybutadiene.
References Cited (Backward Citations)
US2569935A
Cited
US2757701A
Cited
US2724425A
Cited
US2897540A
Cited
US3017391A
Cited
US3229013A
Cited
US3505448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |