CA1086201A - Polyester inserts in single-ply radial tires - Google Patents
Polyester inserts in single-ply radial tiresInfo
- Publication number
- CA1086201A CA1086201A CA303,580A CA303580A CA1086201A CA 1086201 A CA1086201 A CA 1086201A CA 303580 A CA303580 A CA 303580A CA 1086201 A CA1086201 A CA 1086201A
- Authority
- CA
- Canada
- Prior art keywords
- ply
- tire
- radial
- insert
- cords
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/28—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers characterised by the belt or breaker dimensions or curvature relative to carcass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
Abstract of the Disclosure A belted one-ply radial tire is disclosed which is characterized by a circumferential cord-fabric insert between the inner liner and the ply.
The insert is of a material with good compressive fatigue resistance such as polyester cord. m e single ply is continuous. The benefits of the high modulus radial ply cords are thus retained, and the disadvantages due to the poor compressive fatigue resistance of such cords are reduced or com-pensated for by the insert so that a durable one-ply radial tire with improved low rolling resistance is obtained.
The insert is of a material with good compressive fatigue resistance such as polyester cord. m e single ply is continuous. The benefits of the high modulus radial ply cords are thus retained, and the disadvantages due to the poor compressive fatigue resistance of such cords are reduced or com-pensated for by the insert so that a durable one-ply radial tire with improved low rolling resistance is obtained.
Description
``~ 620~
:
The rolling resistance of one-ply tires is believed to be superior to that of mLltiple ply tires. Because tires with low rolling resistance conserve energy, a one-ply tire is a desired form of tire.
An increasing proportion of the tires which are bPing manufactured today are one ply radial tires. ~hen certain ma~rials which have high modulus but poor resistance to ccmpression fatigue, such as fiberglass, spun steel wi~e and aramid, are used in the ply or bod~ reinforcement portion of a radial tire, there is a tendency for the ply to break in the crawn area. These breaks can lead to breaks in the inner liner and tire failure.
This is believed to be caused by the pantographing action of the cincture ~ -belt of the tire.
By high modulus is meant an initial modulus of from 200 to 600 GæD/100% or higher. GæD/100% means grams force per denier at 100% elongatian as determined by ASTM Procedure ~885-76.
Radials are naw predomlnantly tw~-ply construction but there is a trend toward one-ply for reasons of economy and also lawer rolling resistance. The one-ply radial can be made with n~lon or polyester body cords beaause of the good resistance to compression fatigue but there are advantages in using high modulus cords. The high modulus materials generally have low thermal shrinkage which contributes to good dimensional stability and also uniformity. Unfortunately, poor resistance to compression fatigue acconpan~es the high m~dulus properties.
The trend is toward these high modulus materials and the invention is a way of getting around the prablems which will probably be encountered in one-ply high modulus plies. ~his problem exists with Kevlar* (aramid~, fiberglass and fine filament steel cords, the biggest problem being with glass.
Radial tires are ordinarily made on special equipment but can be and are made on conventional equipment. We prefer to use radial tire eguipment, however.
The problem of ply cord breakage in the crown of the tire probably would not occur in some prior art aonfigurations. Examples of prior art where * Trade Ma~
. ~ . ,~, - 1~86ZOl ply cord breakage w~uld not occur in the crown area are those described by Burdon m Uhited States Patents 2,493,614 (1950) and 3,192,984 (1965).
~hat Burdon does is to elimunate the center cord plies and replace then with a high modulus rubber. According to Burdon this provides a softer ride and prevents, to some degree, noise transmission that wDuld normally occur throughout the tire cords. A variation of the Burdon theme is found in Australian Patent 27,833/71 Guyot.
The Guyot patent is directed to a tire having two carcass plies ex$ept in the crown area. In the crown area Guyot eliminates one of the carcass plies.
Some of the problems encountered with the prior art tires are as follows. The carcass of a radial tire is normally manufactured on a flat drum. It would appear that it w~uld be easier ~or a tire builder to apply a single radial cord ply to the drum and aenter it rather than apply two relatively narrow partial plies, one on each side of the tire, and get them absolutely parallel. It would seem that force variatiQns might exist around the circumference of a tire during use if the partial plies were not aligned properly.
Anokher problem which would occur during tire building, the tire carcass, as it is made on a 1at drum, is expanded to a t~roidal shape. I
there was no carcass ply in the center of the tire but only an insert under the ply and the tire were expanded with an in1at~b1e rubber bladder, the center of the carcass wDuld exFand as the aord ply would be pulled fnom the center due to cords sliding in the rubber. This is particularly true of the newer glass cords which have low cohesiveness to unaured rubber compound.
The prior art tires discussed here are the Burdon and Guyot tires.
Another problem with the Burdon tires ~hich elimlnates carcass ply from the center of th~ tire is that of crack propagation. Burdon replaaes the strength o tire cords with high modulus rubber. ~hen a crack forms in such a material, continued flexing of the tire will cause the crack to propagate through the rubber.
The object of the invention is to provide a cQntinuous one-ply
:
The rolling resistance of one-ply tires is believed to be superior to that of mLltiple ply tires. Because tires with low rolling resistance conserve energy, a one-ply tire is a desired form of tire.
An increasing proportion of the tires which are bPing manufactured today are one ply radial tires. ~hen certain ma~rials which have high modulus but poor resistance to ccmpression fatigue, such as fiberglass, spun steel wi~e and aramid, are used in the ply or bod~ reinforcement portion of a radial tire, there is a tendency for the ply to break in the crawn area. These breaks can lead to breaks in the inner liner and tire failure.
This is believed to be caused by the pantographing action of the cincture ~ -belt of the tire.
By high modulus is meant an initial modulus of from 200 to 600 GæD/100% or higher. GæD/100% means grams force per denier at 100% elongatian as determined by ASTM Procedure ~885-76.
Radials are naw predomlnantly tw~-ply construction but there is a trend toward one-ply for reasons of economy and also lawer rolling resistance. The one-ply radial can be made with n~lon or polyester body cords beaause of the good resistance to compression fatigue but there are advantages in using high modulus cords. The high modulus materials generally have low thermal shrinkage which contributes to good dimensional stability and also uniformity. Unfortunately, poor resistance to compression fatigue acconpan~es the high m~dulus properties.
The trend is toward these high modulus materials and the invention is a way of getting around the prablems which will probably be encountered in one-ply high modulus plies. ~his problem exists with Kevlar* (aramid~, fiberglass and fine filament steel cords, the biggest problem being with glass.
Radial tires are ordinarily made on special equipment but can be and are made on conventional equipment. We prefer to use radial tire eguipment, however.
The problem of ply cord breakage in the crown of the tire probably would not occur in some prior art aonfigurations. Examples of prior art where * Trade Ma~
. ~ . ,~, - 1~86ZOl ply cord breakage w~uld not occur in the crown area are those described by Burdon m Uhited States Patents 2,493,614 (1950) and 3,192,984 (1965).
~hat Burdon does is to elimunate the center cord plies and replace then with a high modulus rubber. According to Burdon this provides a softer ride and prevents, to some degree, noise transmission that wDuld normally occur throughout the tire cords. A variation of the Burdon theme is found in Australian Patent 27,833/71 Guyot.
The Guyot patent is directed to a tire having two carcass plies ex$ept in the crown area. In the crown area Guyot eliminates one of the carcass plies.
Some of the problems encountered with the prior art tires are as follows. The carcass of a radial tire is normally manufactured on a flat drum. It would appear that it w~uld be easier ~or a tire builder to apply a single radial cord ply to the drum and aenter it rather than apply two relatively narrow partial plies, one on each side of the tire, and get them absolutely parallel. It would seem that force variatiQns might exist around the circumference of a tire during use if the partial plies were not aligned properly.
Anokher problem which would occur during tire building, the tire carcass, as it is made on a 1at drum, is expanded to a t~roidal shape. I
there was no carcass ply in the center of the tire but only an insert under the ply and the tire were expanded with an in1at~b1e rubber bladder, the center of the carcass wDuld exFand as the aord ply would be pulled fnom the center due to cords sliding in the rubber. This is particularly true of the newer glass cords which have low cohesiveness to unaured rubber compound.
The prior art tires discussed here are the Burdon and Guyot tires.
Another problem with the Burdon tires ~hich elimlnates carcass ply from the center of th~ tire is that of crack propagation. Burdon replaaes the strength o tire cords with high modulus rubber. ~hen a crack forms in such a material, continued flexing of the tire will cause the crack to propagate through the rubber.
The object of the invention is to provide a cQntinuous one-ply
- 2 -- . . . :
62~1 radial tire made from standard high modulus ply matcrials which has improved resistance to cord failure and performs as well as regular two-ply radial tires.
In accordance with the present invention, there is provided a radial ply pneumatic tire of the type comprising a continuous ply from bead to bead of radial cord reinforcement having an initial modulus greater than 200 GPD/100~ embedded in an elastomeric matrix, an inner liner contiguous to the ply, and a cincture belt reinforcing the tread portion of the tire, which additionally includes an insert sheet positioned under the radial center line of the tire, circumferentially disposed around the tire and embedded in an elastomeric matrix between the inner liner and the ply; the insert being formed of a material having a break strength reduction of not more than 35% after 10.8 megacycles using Goodrich Disk fatigue test method; the insert having an axial width less than the axial width of the cincture belt; and the material including rein-forcing cords oriented in the same direction as the reinforcing cords of the plyO
Suitable materials for the insert are those with ; good compression fatigue resistance, such as rayon, polyester or nylon tire cord materialO As indicated, such materials can be characteri7ed by a Goodrich Disk fatigue as determined in a Goodrich fatigue tester of 10.8 megacycles. The cori would not be expected to lose more than 35% of its breaking strength at 10.8 megacyclesO The conditions the machine would be running at are a compression of 6.3% and an elongation of 12.6% while the cord is embedded in rubber. In this way, it is possible to build a one-ply radial tire which performs substantially as well as a two-ply tire, has lower rolling resistance, and has cost and manufacturing advantages.
~ - 3 -~, ~
1~6ZOl In the practice of the present invention, all of the difficulties encountered in the practice of the Burdon and Guyot inventions outlined above have been eliminated. In build-ing the tire, according to the present invention, a single sheet made of glass cords and a center insert made of polyester cords can be used by the tire builder in constructing the tire. There is no problem expanding the carcass from a flat drum configura-tion to a toroidal shape because the carcass is reinforced across its entire width with reinforcing cord. Alss, when a circumferential crack starts in the continuous ply of the tire of the present invention, it can only propagate through the rubber and will not propagate through the cord reinforcement and the inner liner whereas it could propagate through an insert of high modulus rubber.
Figure 1 is a partial perspective view, with portions broken away, of a one-ply radial tire assembly according to the present invention.
Figure 2 is a plan view, with portions broken away, of the crown or top of the tire of Figure lo One form of the invention is shown in Figures 1 and 2 which depict a one-ply tubeless radial tire 1 of generally toroidal shape with a tread or crown portion 2, sidewall por-tions 3 and 4, a circumferential belt or cincture assembly 5, a butyl rubber inner liner 6, and a single ply 7 of :` ' - 3a -- -, . : : , :
: : : - . - : : . : .
' 1~8~201 continuous parallel radial cords comprising a single CQntinuOuS ply portion 7.
me single ply 7 is located next to the inner liner 6, ply portion 7 extending from one tire bead through the tread section to the other tire bead. The radial ply portions extend around the shouldPr of the tire, which is the junction of the tread and sidewall, and well inside the cincture belt 5. If the width of the tread on the road is five inches, for example, the width of the cincture belt is preferably about 5-3/4 inches.
In accordance with the invention, an insert sheet 9 is placed between the inner liner and the continuous radial body ply. The insert underlies the ply. m e insert is made of conventional polyester tire cord fabric with superior compression and fatigue resistance and preferably has a multiplicity o mutually parallel, continuous co~ds which are parallel to the radial ply cords and extends in width substantially from one shoulder of the tire to the other. It may be of the same width as the cincture belt 5 or somewhat smaller in width.
The cords of the radial plies are preferably made of fiberglass, other high mcdulus material ccmmonly used in tire cords, such as steel wire or aramid fibers can be used. These high modulus materials generally have poor ccmçression fatigue resistance.
The cords of the insert sheet 9 are made of common tire cord ; materials which hav~ ~od compression fatigue ~esistance, such as nylon, rayDn, polyester, PU~ and other materials well kn~wn in the art for use in tire cords.
The term "polyester" as applied to tire cord materials includes polyethvlene terephthalate fiber. The term "PU~" means a polyvinyl alcchol fiber~
A tire with one continuous glass fiber radial ply having a polyester insert and a steel c mcture belt was compared against a glass fiber two-ply radial tire with a steel belt in dynamlc tire tests and pPrfo~med well.
CbrresFonding tires were built having a center gap in the radial ply and were d inferior quality to the continuous ply tire. When glass cords made by current manufacturing methods were used to build tires having a center gap in th.e ply, they were too deformed to be used for test purposes. It is believed that the glass ply tires of the present invention are far superior , , 1~)86ZOl to those of Guyot, because the Gu~ot tire cannot be made in conventional radial tire building e~uipment using glass cord currently available. Ihis cord has insufficient cohesiveness to uncured rubber compound to prevent deformation in the building prwess.
~ he cords of the insert 9 are preferably parallel or very nearly parallel to the cords of the radial ply in order to obtain low rolling resistance, I believe, however, that the insert could also be a non-woven tire fabric sheet.
The mutually parallel cords of the radial ply and the msert are embedded in an elastomeric matrix-as in conventioNal tire cord fabric as commonly used. These procedures æe well kncwn to those s~illed in the art.
While the advan$ages of the invention principally accrue when the insert is employed in a continuous one-ply radial tire, it should be apparent that some benefits can be obtained with two-ply radial tires.
Obvious mDdifications which can be made relative to the foregoing description are intended to fall within the scope of the invention.
, ~ -
62~1 radial tire made from standard high modulus ply matcrials which has improved resistance to cord failure and performs as well as regular two-ply radial tires.
In accordance with the present invention, there is provided a radial ply pneumatic tire of the type comprising a continuous ply from bead to bead of radial cord reinforcement having an initial modulus greater than 200 GPD/100~ embedded in an elastomeric matrix, an inner liner contiguous to the ply, and a cincture belt reinforcing the tread portion of the tire, which additionally includes an insert sheet positioned under the radial center line of the tire, circumferentially disposed around the tire and embedded in an elastomeric matrix between the inner liner and the ply; the insert being formed of a material having a break strength reduction of not more than 35% after 10.8 megacycles using Goodrich Disk fatigue test method; the insert having an axial width less than the axial width of the cincture belt; and the material including rein-forcing cords oriented in the same direction as the reinforcing cords of the plyO
Suitable materials for the insert are those with ; good compression fatigue resistance, such as rayon, polyester or nylon tire cord materialO As indicated, such materials can be characteri7ed by a Goodrich Disk fatigue as determined in a Goodrich fatigue tester of 10.8 megacycles. The cori would not be expected to lose more than 35% of its breaking strength at 10.8 megacyclesO The conditions the machine would be running at are a compression of 6.3% and an elongation of 12.6% while the cord is embedded in rubber. In this way, it is possible to build a one-ply radial tire which performs substantially as well as a two-ply tire, has lower rolling resistance, and has cost and manufacturing advantages.
~ - 3 -~, ~
1~6ZOl In the practice of the present invention, all of the difficulties encountered in the practice of the Burdon and Guyot inventions outlined above have been eliminated. In build-ing the tire, according to the present invention, a single sheet made of glass cords and a center insert made of polyester cords can be used by the tire builder in constructing the tire. There is no problem expanding the carcass from a flat drum configura-tion to a toroidal shape because the carcass is reinforced across its entire width with reinforcing cord. Alss, when a circumferential crack starts in the continuous ply of the tire of the present invention, it can only propagate through the rubber and will not propagate through the cord reinforcement and the inner liner whereas it could propagate through an insert of high modulus rubber.
Figure 1 is a partial perspective view, with portions broken away, of a one-ply radial tire assembly according to the present invention.
Figure 2 is a plan view, with portions broken away, of the crown or top of the tire of Figure lo One form of the invention is shown in Figures 1 and 2 which depict a one-ply tubeless radial tire 1 of generally toroidal shape with a tread or crown portion 2, sidewall por-tions 3 and 4, a circumferential belt or cincture assembly 5, a butyl rubber inner liner 6, and a single ply 7 of :` ' - 3a -- -, . : : , :
: : : - . - : : . : .
' 1~8~201 continuous parallel radial cords comprising a single CQntinuOuS ply portion 7.
me single ply 7 is located next to the inner liner 6, ply portion 7 extending from one tire bead through the tread section to the other tire bead. The radial ply portions extend around the shouldPr of the tire, which is the junction of the tread and sidewall, and well inside the cincture belt 5. If the width of the tread on the road is five inches, for example, the width of the cincture belt is preferably about 5-3/4 inches.
In accordance with the invention, an insert sheet 9 is placed between the inner liner and the continuous radial body ply. The insert underlies the ply. m e insert is made of conventional polyester tire cord fabric with superior compression and fatigue resistance and preferably has a multiplicity o mutually parallel, continuous co~ds which are parallel to the radial ply cords and extends in width substantially from one shoulder of the tire to the other. It may be of the same width as the cincture belt 5 or somewhat smaller in width.
The cords of the radial plies are preferably made of fiberglass, other high mcdulus material ccmmonly used in tire cords, such as steel wire or aramid fibers can be used. These high modulus materials generally have poor ccmçression fatigue resistance.
The cords of the insert sheet 9 are made of common tire cord ; materials which hav~ ~od compression fatigue ~esistance, such as nylon, rayDn, polyester, PU~ and other materials well kn~wn in the art for use in tire cords.
The term "polyester" as applied to tire cord materials includes polyethvlene terephthalate fiber. The term "PU~" means a polyvinyl alcchol fiber~
A tire with one continuous glass fiber radial ply having a polyester insert and a steel c mcture belt was compared against a glass fiber two-ply radial tire with a steel belt in dynamlc tire tests and pPrfo~med well.
CbrresFonding tires were built having a center gap in the radial ply and were d inferior quality to the continuous ply tire. When glass cords made by current manufacturing methods were used to build tires having a center gap in th.e ply, they were too deformed to be used for test purposes. It is believed that the glass ply tires of the present invention are far superior , , 1~)86ZOl to those of Guyot, because the Gu~ot tire cannot be made in conventional radial tire building e~uipment using glass cord currently available. Ihis cord has insufficient cohesiveness to uncured rubber compound to prevent deformation in the building prwess.
~ he cords of the insert 9 are preferably parallel or very nearly parallel to the cords of the radial ply in order to obtain low rolling resistance, I believe, however, that the insert could also be a non-woven tire fabric sheet.
The mutually parallel cords of the radial ply and the msert are embedded in an elastomeric matrix-as in conventioNal tire cord fabric as commonly used. These procedures æe well kncwn to those s~illed in the art.
While the advan$ages of the invention principally accrue when the insert is employed in a continuous one-ply radial tire, it should be apparent that some benefits can be obtained with two-ply radial tires.
Obvious mDdifications which can be made relative to the foregoing description are intended to fall within the scope of the invention.
, ~ -
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A radial ply pneumatic tire of the type comprising a continuous ply from bead to bead of radial cord reinforcement having an initial modulus greater than 200 GPD/100% embedded in an elastomeric matrix, an inner liner contiguous to the ply, and a cincture belt reinforcing the tread portion of the tire, which additionally includes an insert sheet positioned under the radial center line of the tire, circumferentially disposed around the tire and embedded in an elastomeric matrix between the inner liner and the ply; the insert being formed of a material having a break strength reduction of not more than 35%
after 10.8 megacycles using Goodrich Disk fatigue test method;
the insert having an axial width less than the axial width of the cincture belt; and the material including reinforcing cords oriented in the same direction as the reinforcing cords of the ply .
after 10.8 megacycles using Goodrich Disk fatigue test method;
the insert having an axial width less than the axial width of the cincture belt; and the material including reinforcing cords oriented in the same direction as the reinforcing cords of the ply .
2. The tire of claim 1 wherein the continuous ply is fiberglass.
3. The tire of claim 1 wherein the continuous ply is aramid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US83538377A | 1977-09-21 | 1977-09-21 | |
| US835,383 | 1977-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1086201A true CA1086201A (en) | 1980-09-23 |
Family
ID=25269372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA303,580A Expired CA1086201A (en) | 1977-09-21 | 1978-05-17 | Polyester inserts in single-ply radial tires |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPS5451104A (en) |
| AR (1) | AR215058A1 (en) |
| AU (1) | AU511446B1 (en) |
| BR (1) | BR7804658A (en) |
| CA (1) | CA1086201A (en) |
| DE (1) | DE2826557A1 (en) |
| ES (1) | ES473104A1 (en) |
| FR (1) | FR2403900A1 (en) |
| GB (1) | GB1598298A (en) |
| IN (1) | IN148659B (en) |
| IT (1) | IT1096488B (en) |
| LU (1) | LU80255A1 (en) |
| PT (1) | PT68136A (en) |
| ZA (1) | ZA783937B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62261504A (en) * | 1986-05-08 | 1987-11-13 | Yokohama Rubber Co Ltd:The | Radial tire for heavy load |
| JP5140951B2 (en) * | 2006-06-30 | 2013-02-13 | 横浜ゴム株式会社 | Pneumatic tire |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1522420A (en) * | 1967-03-14 | 1968-04-26 | Uniroyal Englebert France | Improvement of radial casings for tire casings |
| FR1538478A (en) * | 1967-07-24 | 1968-09-06 | Uniroyal Englebert France | Radial carcass tire casing with reinforced sidewalls |
| FR2093277A5 (en) * | 1970-06-09 | 1972-01-28 | Fiverel Civile Etu Reche | |
| FR2279573A2 (en) * | 1974-07-25 | 1976-02-20 | Michelin & Cie | Vehicle tyre minimising meridianal reinforcement-layer bending - additional oblique reinforcements overlap radial crown and carcase layers |
| FR2380907A1 (en) * | 1977-02-21 | 1978-09-15 | Kleber Colombes | TIRES FOR VEHICLES |
-
1978
- 1978-05-17 CA CA303,580A patent/CA1086201A/en not_active Expired
- 1978-05-24 AU AU36404/78A patent/AU511446B1/en not_active Expired
- 1978-05-31 GB GB24782/78A patent/GB1598298A/en not_active Expired
- 1978-06-05 PT PT68136A patent/PT68136A/en unknown
- 1978-06-05 IN IN415/DEL/78A patent/IN148659B/en unknown
- 1978-06-07 AR AR272484A patent/AR215058A1/en active
- 1978-06-16 IT IT24656/78A patent/IT1096488B/en active
- 1978-06-16 DE DE19782826557 patent/DE2826557A1/en not_active Ceased
- 1978-07-10 ZA ZA00783937A patent/ZA783937B/en unknown
- 1978-07-19 BR BR7804658A patent/BR7804658A/en unknown
- 1978-09-05 ES ES473104A patent/ES473104A1/en not_active Expired
- 1978-09-09 JP JP11024078A patent/JPS5451104A/en active Pending
- 1978-09-18 FR FR7826655A patent/FR2403900A1/en not_active Withdrawn
- 1978-09-19 LU LU80255A patent/LU80255A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IN148659B (en) | 1981-05-02 |
| DE2826557A1 (en) | 1979-03-29 |
| AU511446B1 (en) | 1980-08-21 |
| AR215058A1 (en) | 1979-08-31 |
| BR7804658A (en) | 1979-05-22 |
| PT68136A (en) | 1978-07-01 |
| IT7824656A0 (en) | 1978-06-16 |
| LU80255A1 (en) | 1979-06-01 |
| FR2403900A1 (en) | 1979-04-20 |
| IT1096488B (en) | 1985-08-26 |
| ES473104A1 (en) | 1979-10-16 |
| GB1598298A (en) | 1981-09-16 |
| ZA783937B (en) | 1979-07-25 |
| JPS5451104A (en) | 1979-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU728223B2 (en) | Low cost light weight radial tire | |
| EP0335588B2 (en) | Radial tyre | |
| AU724139B2 (en) | Light weight aramid belted radial tire | |
| EP0075528B1 (en) | Pneumatic tire | |
| US7188654B2 (en) | Ply with strength carriers embedded in a rubber mixture and vehicle pneumatic tires with a belt bandage thereof | |
| EP0157716A1 (en) | Flat wire reinforcement in tyre belt and carcass | |
| CZ292553B6 (en) | Radial pneumatic tire | |
| US20120168059A1 (en) | Pneumatic tire and method for making a pneumatic tire | |
| EP0396494B1 (en) | Radial ply tire | |
| US20120085475A1 (en) | Pneumatic tire with a knitted flipper | |
| US20120085474A1 (en) | Pneumatic tire with a woven metallic reinforcement | |
| US4962802A (en) | Pneumatic vehicle tire | |
| CA1086201A (en) | Polyester inserts in single-ply radial tires | |
| US4262725A (en) | Polyester inserts in single-ply radial tires | |
| EP0182978A2 (en) | Tire construction utilizing low-twist body ply yarn with low turn-up ends | |
| EP2682280B1 (en) | Tire | |
| JP4796726B2 (en) | Tire with excellent durability | |
| US20010013386A1 (en) | Radial tire crown reinforcement | |
| KR20110026558A (en) | Woven fabrics for capply of pneumatic tire and the pneumatic tire using it | |
| JP4257723B2 (en) | Tire and rim assembly | |
| JP3982901B2 (en) | Pneumatic tire | |
| EP1198360B1 (en) | Fabric support for metal reinforced inner ply of runflat tire | |
| JP2004306636A (en) | Pneumatic radial tire | |
| US6814120B1 (en) | Fabric support for metal reinforced inner ply of runflat tire | |
| US6460585B1 (en) | Tire with tread compound contacting belt cords |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |