Claims
- 1. In a pneumatic radial tire for passenger cars which has a tread, a steel belt composed of at least two superposed plies of a steel cord layer made of a parallel array of steel cords and a reinforcement structure made of organic fiber cords which is placed radially outward of the steel belt, the improvement wherein said reinforcement structure is composed of a full band reinforcement layer that covers the whole width of the steel belt and an edge band reinforcement layer that is placed either between the full band reinforcement layer and the steel belt or between the full band reinforcement layer and the tread to cover each edge of that steel belt, and wherein the circumferential location of the joint area of the full band reinforcement layer and the joint area of the tread forms an angle of 150.degree. to 210.degree. therebetween, and the joint area of the edge band reinforcement layer is circumferentially located between the joint area of said tread and that of the full band reinforcement layer within the 150.degree. to 210.degree. angle to form an angle of not less than 30 degrees with each of the joint areas of the tread and the full band reinforcement layer with respect to the central tire axis.
- 2. A pneumatic radial tire for passenger cars, said radial tire comprising a tread, a steel belt and a reinforcement structure, said steel belt having at least two superposed plies of a steel cord layer, said steel cord layer being made of a parallel array of steel cords, said reinforcement structure being made of organic fiber cords which is placed radially outward of the steel belt,
- said reinforcement structure comprising a full band reinforcement layer that covers the whole width of the steel belt and an edge band reinforcement layer placed either between said full band reinforcement layer and said steel belt or between said full band reinforcement layer and said tread, said edge band reinforcement layer being positioned to cover each edge of the steel belt, wherein the circumferential location of the joint area of the full band reinforcement layer and the joint area of the tread forms an angle of 150.degree. to 210.degree. therebetween, and wherein the joint area of the edge band reinforcement layer is circumferentially located between the joint area of said tread and the joint area of the full band reinforcement layer within the 150.degree. to 210.degree. angle, the joint area of said edge band reinforcement layer forming an angle of about 180 degrees with the joint area of the tread.
- 3. A pneumatic radial tire for passenger cars, said radial tire comprising a tread, a steel belt and a reinforcement structure, said steel belt having at least two superposed plies of a steel cord layer, said steel cord layer being made of a parallel array of steel cords, said reinforcement structure being made of organic fiber cords which are placed radially outward of the steel belt,
- wherein said reinforcement structure comprising a full band reinforcement layer that covers that whole width of the steel belt and an edge band reinforcement layer that is placed either between said full band reinforcement layer and said steel belt or between said full band reinforcement layer and said tread, said edge band reinforcement layer being positioned to cover each edge of the steel belt, wherein the circumferential location of the joint area of the full band reinforcement layer and the joint area of the tread forms an angle of 150.degree. to 210.degree. therebetween, and wherein the joint area of the edge band reinforcement layer is circumferentially located between the joint area of said tread and the joint area of the full band reinforcement layer within the 150.degree. to 210.degree. angle, the joint area of said edge band reinforcement layer forming an angle of about 106 degrees with the joint area of the tread.
- 4. A pneumatic radial tire for passenger cars, said radial tire comprising a tread, a steel belt and a reinforcement structure, said steel belt having at least two superposed plies of a steel cord layer, said steel cord layer being made of a parallel array of steel cords, said reinforcement structure being made of organic fiber cords which are placed radially outward of said steel belt,
- said reinforcement structure comprising a full band reinforcement layer that covers the whole width of said steel belt and an edge band reinforcement layer placed either between said full band reinforcement layer and said steel belt or between said full band reinforcement layer and said tread, said edge band reinforcement layer being positioned to cover each edge of the steel belt, wherein the circumferential location of the joint area of the full band reinforcement layer and the joint area of the tread forms an angle of 150.degree. to 210.degree. therebetween, and wherein the joint area of the edge band reinforcement layer is circumferentially located between the joint area of said tread and the joint area of said full band reinforcement layer within the 150.degree. to 210.degree. angle, the joint area of said edge band reinforcement layer forming an angle of about 180 degrees with the joint area of the full band reinforcement layer.
- 5. A pneumatic radial tire for passenger cars, said radial tire comprising a tread having a joint area, a steel belt and a reinforcement structure, said steel belt having at least two superposed plies of a steel cord layer, said steel cord layer being made of a parallel array of steel cords, said reinforcement structure being made of organic fiber cords which are placed radially outward of said steel belt,
- said reinforcement structure comprising a full band reinforcement layer having a joint area, said full band reinforcement layer having an axial width that covers the whole width of said steel belt, said reinforcement structure further comprising an edge band reinforcement layer placed either between said full band reinforcement layer and said steel belt or between said full band reinforcement layer and said tread, said edge band reinforcement layer being positioned to cover each edge of the steel belt, wherein the circumferential location of the joint area of the full band reinforcement layer and the joint area of the tread forms an angle of 150.degree. to 210.degree. therebetween, and wherein the joint area of the edge band reinforcement layer is circumferentially located between the joint area of said tread and the joint area of said full band reinforcement layer within the 150.degree. to 210.degree. angle, the joint area of said edge band reinforcement layer forming an angle of about 80 degrees with the joint area of the full band reinforcement layer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-292412 |
Nov 1988 |
JPX |
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Parent Case Info
This is a continuation-in-part of application Ser. No. 07/436,698, filed Nov. 15, 1989 now abandoned, titled "Pneumatic Radial Tire for Passenger Cars."
US Referenced Citations (5)
Foreign Referenced Citations (9)
Number |
Date |
Country |
1085434 |
Jul 1960 |
DEX |
2824299 |
Dec 1979 |
DEX |
2824348 |
Dec 1979 |
DEX |
2824357 |
Dec 1979 |
DEX |
58-133903 |
Aug 1983 |
JPX |
62-279109 |
Dec 1987 |
JPX |
63-125408 |
May 1988 |
JPX |
1-9005 |
Jan 1989 |
JPX |
2-099407 |
Apr 1990 |
JPX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
436698 |
Nov 1989 |
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