CA1175325A - Insulated bead for a radial steel ply tire - Google Patents
Insulated bead for a radial steel ply tireInfo
- Publication number
- CA1175325A CA1175325A CA000407457A CA407457A CA1175325A CA 1175325 A CA1175325 A CA 1175325A CA 000407457 A CA000407457 A CA 000407457A CA 407457 A CA407457 A CA 407457A CA 1175325 A CA1175325 A CA 1175325A
- Authority
- CA
- Canada
- Prior art keywords
- bead
- rubber
- composite
- fabric
- stage composite
- 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
- 239000011324 bead Substances 0.000 title claims abstract description 70
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 17
- 239000010959 steel Substances 0.000 title claims abstract description 17
- 229920001971 elastomer Polymers 0.000 claims abstract description 45
- 239000004744 fabric Substances 0.000 claims abstract description 32
- 239000002131 composite material Substances 0.000 claims description 22
- 239000000314 lubricant Substances 0.000 claims description 8
- 244000043261 Hevea brasiliensis Species 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229920003052 natural elastomer Polymers 0.000 claims description 4
- 229920001194 natural rubber Polymers 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 3
- 239000002654 heat shrinkable material Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000005477 standard model Effects 0.000 description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0606—Reinforcing cords for rubber or plastic articles
- D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
-
- 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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
-
- 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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
- B60C2015/044—Bead cores characterised by a wrapping layer
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
- D07B1/141—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2033—Parallel wires
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2042—Strands characterised by a coating
- D07B2201/2044—Strands characterised by a coating comprising polymers
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2046—Strands comprising fillers
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/2087—Jackets or coverings being of the coated type
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/2088—Jackets or coverings having multiple layers
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/2089—Jackets or coverings comprising wrapped structures
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/20903—Jackets or coverings comprising woven structures
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/2091—Jackets or coverings being movable relative to the internal structure
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2046—Tyre cords
- D07B2501/2053—Tyre cords for wheel rim attachment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Ropes Or Cables (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The positioning of fabric wrapped rubber insulation between a steel bead and a radial steel body ply eliminates failures in the bead areas of tires due to the direct contact of the steel body ply and bead bundle wires.
The positioning of fabric wrapped rubber insulation between a steel bead and a radial steel body ply eliminates failures in the bead areas of tires due to the direct contact of the steel body ply and bead bundle wires.
Description
1~75325 The invention relates to an insulated bead for a radial or a steel ply radial tire.
Steel beads make it possible to securely affix tires to rims. Tire beads are made from coiled wire. The individual strands of the wire may be coated with rubber and the plurality of rubber coated s~rands may be helically wrapped with a fabric or cord. United States Patent 3,106,952 Rudder (1963) describes such a tire bead. The Rudder patent i5 directed primarily to wrapping the bead bundle with a heat-shrinkable material having widely spaced turns. During heat curing of the tire, the heat shrinkable material contracts and compress the wound bead wires (bead bundle), thus preventing wild bead wires from getting into the sidewall or some other portion of the tire where they could cause damage. The heat shrinkable material does not keep the rubber around the bead bundle in place. It has also been known in the prior art to wrap the bead bundle with rubber prior to adding a flipper to provide an insulating layer of rubber between the bead bundle and the next adjacent body ply. In spite of the addition of the rubber wrap, some failures continued to occur in the bead area of experimental ~20 steel ply radial tires. Wrapping a bead bundle with rubber and adding a flipper is discussea in "The Story of Tire Beads and :
Tires"j Niles Standard 1954, pages 80-82.
The invention as claimed is not intended to provide a remedy for wild bead wires of steel ply radial tires. It solves the problem of how to provide insulation between the bead bundle and adjacent steel body ply of steel belted, steel ply radial tires. In the practice of the present invention, the bead wires and a steel body ply can no longer come into direct contact, and .~
generate fretting corrosion, resulting in ultimate failure of the tire.
The invention provldes a method of constructing a com-posite bead ring structure for inclusion in a steel ply radial tire comprising: a. producing a first-stage composite by forming a strand of rubber covered wire into a multiple strand substantial-ly circular configuration, the cross-sectional area of said first-stage composite being of a substantially hexagonal shape, b. pro-ducing a second-stage composite by envelope wrapping said first-stage composite with natural rubber obtaining thereby a second-stage composite having a substantially circular cross-section, c.
producing a third-stage composite by helically wrapping said second-stage composite with a narrow width of fabric, and there-after coating said third-stage composite with an appropriate lubri-cant to produce said composite bead ring structure.
From another aspect, the invention provides a composite bead ring structure for inclusion in a radial tire comprising a central portion of substantially circular configuration having a hexagonal cross-sectional area and consisting of multiple strands of rubber-covered wire, said central portion being envelope wrapped in natural rubber which is in turn helically wrapped with a narrow width of fabric and coated with a lubricant.
The advantages offered by the invention are mainly that the rubber insulation which is applied to the bead bundle of rubber covered bead wires is tightly envelope wrapped or helically wrapped with a fabric covering which prevents movement of the insulation caused by turning the steel body ply up over the bead bundle by the pressures incurred during tire molding of the tire
Steel beads make it possible to securely affix tires to rims. Tire beads are made from coiled wire. The individual strands of the wire may be coated with rubber and the plurality of rubber coated s~rands may be helically wrapped with a fabric or cord. United States Patent 3,106,952 Rudder (1963) describes such a tire bead. The Rudder patent i5 directed primarily to wrapping the bead bundle with a heat-shrinkable material having widely spaced turns. During heat curing of the tire, the heat shrinkable material contracts and compress the wound bead wires (bead bundle), thus preventing wild bead wires from getting into the sidewall or some other portion of the tire where they could cause damage. The heat shrinkable material does not keep the rubber around the bead bundle in place. It has also been known in the prior art to wrap the bead bundle with rubber prior to adding a flipper to provide an insulating layer of rubber between the bead bundle and the next adjacent body ply. In spite of the addition of the rubber wrap, some failures continued to occur in the bead area of experimental ~20 steel ply radial tires. Wrapping a bead bundle with rubber and adding a flipper is discussea in "The Story of Tire Beads and :
Tires"j Niles Standard 1954, pages 80-82.
The invention as claimed is not intended to provide a remedy for wild bead wires of steel ply radial tires. It solves the problem of how to provide insulation between the bead bundle and adjacent steel body ply of steel belted, steel ply radial tires. In the practice of the present invention, the bead wires and a steel body ply can no longer come into direct contact, and .~
generate fretting corrosion, resulting in ultimate failure of the tire.
The invention provldes a method of constructing a com-posite bead ring structure for inclusion in a steel ply radial tire comprising: a. producing a first-stage composite by forming a strand of rubber covered wire into a multiple strand substantial-ly circular configuration, the cross-sectional area of said first-stage composite being of a substantially hexagonal shape, b. pro-ducing a second-stage composite by envelope wrapping said first-stage composite with natural rubber obtaining thereby a second-stage composite having a substantially circular cross-section, c.
producing a third-stage composite by helically wrapping said second-stage composite with a narrow width of fabric, and there-after coating said third-stage composite with an appropriate lubri-cant to produce said composite bead ring structure.
From another aspect, the invention provides a composite bead ring structure for inclusion in a radial tire comprising a central portion of substantially circular configuration having a hexagonal cross-sectional area and consisting of multiple strands of rubber-covered wire, said central portion being envelope wrapped in natural rubber which is in turn helically wrapped with a narrow width of fabric and coated with a lubricant.
The advantages offered by the invention are mainly that the rubber insulation which is applied to the bead bundle of rubber covered bead wires is tightly envelope wrapped or helically wrapped with a fabric covering which prevents movement of the insulation caused by turning the steel body ply up over the bead bundle by the pressures incurred during tire molding of the tire
- 2 -
3~7~3~
and by forces incurred during tire operation. For the purposes of the present invention, applying a flipper to a bead is not con-sidered wrapping the bead.
There are a number of ways of carrying ou-t the invention depending on what type of tire building drum is employed. For example, if a zero-crown drum tire building machine is used, one first envelope wraps the bead bundle with a layer of rubber, then coats the rubber cover with zinc stearate or a comparable lubri-cant 4; then applies a second rubber cover envelope wrapped; then applies a tight fabric cover, helically wrapped or envelope wrapped. The reason for this is that in forming a toroidal con-figuration from the flat drum, green components adjacent to the bead bundle must rotate in the tire. The lubricant allows the adjacent components to the bead bundle to rotate with a minimum of distortion. The fabric wrap holds the rubber around the bead bundle in place during the various tire building operations. The second layer of rubber and the fabric wrapping can be replaced by a fabric rubber laminate. In the finished tire, the above-described procedure prevents metal-to-metal contact between the bead and the body ply and the resulting fretting corrosion. The zinc stearate is applied as a 6 percent suspension in isopropyl alcohol.
When a high-crown drum is employed and in other situa-tions where the green components need not significantly move with respect to the bead in the tire during tire building; the lubricant and the second layer of rubber wrapping need not be employed.
In the preferred embodiment, sufficient rubber is applied to the steel cord bundle to provide from 0.1 cm to 0.7 cm of 2a -,~
additional rubber insulation in the area where the rubber covered bead wires come into proximity with a steel body ply. The fabric cover covers at least 80 percent and preferably 100 percent of the outer surface of the insulating layer. It is particularly important that the rubber insulating layer cover all areas oE ~he bead that would otherwise be in contact with ply wire. When the fabric bead cover is helically wrapped on~o the bead, the fabric is preferably nylon impre~nated with rubber. The fabric used in the preferred helical wrap has a width of from .5 to 3.0 cm.
When the fabric is enveloped wrapped over the rubber covered bead bundle, the Eabric preferably has a width at least 30 percent greater than the cross-sectional circumference oE the bead bundle. This provides a locking overlap which in turn prevents the package Erom opening and releasing the rubber insulation when pressure is applied to the enveloped wrapped rubber covered bead bundle during tire buildin~. Preferably the fabric completely vers the surface of each rubber covered bead. It is also preferred that no bead filler strip be present inside of the ~ wrap. Instead of separately covering the bead bundle with rubber ; 20 and fabric, the bead bundle can be wrapped with a rubber-fabric laminate.
~ One way of carrying out the invention is described in detail below with reference to the drawin~s which illustrate these specific embodiments in which:
Fi~ure 1 is a cross-sectional view showing a hexagonal bead having a rubber and fabric cover.
Figure 2 is a cross-sectional view showing an envelope wrap.
Fi~ure 3 is a hexa~onal bead bundle covered with 2 layers of rubber and an outer cover of fabric wherein a lubricant is interposed between the two rubber layers.
e figures show various rubber covered wrapped bead bundles.
In accordance with the invention, a hexa~onal bead bundle is first formed by wrapping a single strand rubber covered wire 1 in a circular configuration to form a bead bundle having a ~L~753~
cross-sectional configuration of 72 wires. The bead bundle has a cross-sectional diameter of 1~83 cm. The uncoated s~rand of wire has a diameter of .13 cm and is coated with a thickness of .013 cm of rubber. The bead forming machine is a National Standard Model 147 described in part in United States Patent 3,741,263. The bead is then enveloped wrapped with a strip of rubber having a width of 5.84 cm and a thickness of .23 cm. There is approximately a .51 cm overlap along the top surface of the bead. The machine used to apply the enveloped wrap is a RJS Corporation; Model 147 Covering Machine; manufactured by RJS Corporation, Akron Ohio. The rubber ~overed bead bundle is then helically wrapped with a fabric 3.
The fabric is square woven nylon having a width of 1.59 cm and a thickness of .028 cm. The fabric is a tackified nylon 6.6 Leno woven material with a denier of 210. The wrapping machine employed is a National Standard Model BSW Spiral Bead Wrapping ~lachine manufactured by The N-S Machinery Division, Niles, Michigan. The wrapped bead produced is then used to build a tire on a high-crown drum in a conventional manner. The tires produced by the present invention do not result in tire failure, due to the body ply fretting while in direct contact with the bead bundle. Tires produced without the fabric wrap over the rubber insulating com-pound may result in such a failureO
The green rubber used to wrap the bead preferably has a mooney viscosity of from 60 to 70 and when cured has a shore A
hardness of from 84 to 92.
Another method of wrapping the bead bundle with rubber and fabric is designed to apply a rubber cover around the bead bundle by the use of expanding bladders. Pertaining to this inven-~753~;~
tion, a rubber laminated fabric may be used. The laminated fabric is placed under the bead bundle with the rubber in contact with the bead and the fabric being the outer surface. A bladder on one side expands and is pushed towards the bead bundle by the use of push cans. The bladder forms the laminated fabric around the bead bundle with its edge ending on the top surface of the bead~ The other side performs the same operation, with the edge of the laminate fabric overlapping the previously ~rapped edge. The Henley invention forms an envelope wrap of rubber and/or rubber laminated fabric.
and by forces incurred during tire operation. For the purposes of the present invention, applying a flipper to a bead is not con-sidered wrapping the bead.
There are a number of ways of carrying ou-t the invention depending on what type of tire building drum is employed. For example, if a zero-crown drum tire building machine is used, one first envelope wraps the bead bundle with a layer of rubber, then coats the rubber cover with zinc stearate or a comparable lubri-cant 4; then applies a second rubber cover envelope wrapped; then applies a tight fabric cover, helically wrapped or envelope wrapped. The reason for this is that in forming a toroidal con-figuration from the flat drum, green components adjacent to the bead bundle must rotate in the tire. The lubricant allows the adjacent components to the bead bundle to rotate with a minimum of distortion. The fabric wrap holds the rubber around the bead bundle in place during the various tire building operations. The second layer of rubber and the fabric wrapping can be replaced by a fabric rubber laminate. In the finished tire, the above-described procedure prevents metal-to-metal contact between the bead and the body ply and the resulting fretting corrosion. The zinc stearate is applied as a 6 percent suspension in isopropyl alcohol.
When a high-crown drum is employed and in other situa-tions where the green components need not significantly move with respect to the bead in the tire during tire building; the lubricant and the second layer of rubber wrapping need not be employed.
In the preferred embodiment, sufficient rubber is applied to the steel cord bundle to provide from 0.1 cm to 0.7 cm of 2a -,~
additional rubber insulation in the area where the rubber covered bead wires come into proximity with a steel body ply. The fabric cover covers at least 80 percent and preferably 100 percent of the outer surface of the insulating layer. It is particularly important that the rubber insulating layer cover all areas oE ~he bead that would otherwise be in contact with ply wire. When the fabric bead cover is helically wrapped on~o the bead, the fabric is preferably nylon impre~nated with rubber. The fabric used in the preferred helical wrap has a width of from .5 to 3.0 cm.
When the fabric is enveloped wrapped over the rubber covered bead bundle, the Eabric preferably has a width at least 30 percent greater than the cross-sectional circumference oE the bead bundle. This provides a locking overlap which in turn prevents the package Erom opening and releasing the rubber insulation when pressure is applied to the enveloped wrapped rubber covered bead bundle during tire buildin~. Preferably the fabric completely vers the surface of each rubber covered bead. It is also preferred that no bead filler strip be present inside of the ~ wrap. Instead of separately covering the bead bundle with rubber ; 20 and fabric, the bead bundle can be wrapped with a rubber-fabric laminate.
~ One way of carrying out the invention is described in detail below with reference to the drawin~s which illustrate these specific embodiments in which:
Fi~ure 1 is a cross-sectional view showing a hexagonal bead having a rubber and fabric cover.
Figure 2 is a cross-sectional view showing an envelope wrap.
Fi~ure 3 is a hexa~onal bead bundle covered with 2 layers of rubber and an outer cover of fabric wherein a lubricant is interposed between the two rubber layers.
e figures show various rubber covered wrapped bead bundles.
In accordance with the invention, a hexa~onal bead bundle is first formed by wrapping a single strand rubber covered wire 1 in a circular configuration to form a bead bundle having a ~L~753~
cross-sectional configuration of 72 wires. The bead bundle has a cross-sectional diameter of 1~83 cm. The uncoated s~rand of wire has a diameter of .13 cm and is coated with a thickness of .013 cm of rubber. The bead forming machine is a National Standard Model 147 described in part in United States Patent 3,741,263. The bead is then enveloped wrapped with a strip of rubber having a width of 5.84 cm and a thickness of .23 cm. There is approximately a .51 cm overlap along the top surface of the bead. The machine used to apply the enveloped wrap is a RJS Corporation; Model 147 Covering Machine; manufactured by RJS Corporation, Akron Ohio. The rubber ~overed bead bundle is then helically wrapped with a fabric 3.
The fabric is square woven nylon having a width of 1.59 cm and a thickness of .028 cm. The fabric is a tackified nylon 6.6 Leno woven material with a denier of 210. The wrapping machine employed is a National Standard Model BSW Spiral Bead Wrapping ~lachine manufactured by The N-S Machinery Division, Niles, Michigan. The wrapped bead produced is then used to build a tire on a high-crown drum in a conventional manner. The tires produced by the present invention do not result in tire failure, due to the body ply fretting while in direct contact with the bead bundle. Tires produced without the fabric wrap over the rubber insulating com-pound may result in such a failureO
The green rubber used to wrap the bead preferably has a mooney viscosity of from 60 to 70 and when cured has a shore A
hardness of from 84 to 92.
Another method of wrapping the bead bundle with rubber and fabric is designed to apply a rubber cover around the bead bundle by the use of expanding bladders. Pertaining to this inven-~753~;~
tion, a rubber laminated fabric may be used. The laminated fabric is placed under the bead bundle with the rubber in contact with the bead and the fabric being the outer surface. A bladder on one side expands and is pushed towards the bead bundle by the use of push cans. The bladder forms the laminated fabric around the bead bundle with its edge ending on the top surface of the bead~ The other side performs the same operation, with the edge of the laminate fabric overlapping the previously ~rapped edge. The Henley invention forms an envelope wrap of rubber and/or rubber laminated fabric.
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of constructing a composite bead ring structure for inclusion in a steel ply radial tire comprising:
a. producing a first-stage composite by forming a strand of rubber covered wire into a multiple strand substantially circular configuration, the cross-sectional area of said first-stage composite being of a substantially hexagonal shape, b. producing a second-stage composite by envelope wrapping said first-stage composite with natural rubber obtaining thereby a second-stage composite having a substantially circular cross-section, c. producing a third-stage composite by helically wrapping said second-stage composite with a narrow width of fabric, and thereafter coating said third-stage composite with an appropriate lubricant to produce said composite bead ring structure.
a. producing a first-stage composite by forming a strand of rubber covered wire into a multiple strand substantially circular configuration, the cross-sectional area of said first-stage composite being of a substantially hexagonal shape, b. producing a second-stage composite by envelope wrapping said first-stage composite with natural rubber obtaining thereby a second-stage composite having a substantially circular cross-section, c. producing a third-stage composite by helically wrapping said second-stage composite with a narrow width of fabric, and thereafter coating said third-stage composite with an appropriate lubricant to produce said composite bead ring structure.
2. A composite bead ring structure for inclusion in a radial tire comprising a central portion of substantially circular con-figuration having a hexagonal cross-sectional area and consisting of multiple strands of ruber-covered wire, said central portion being envelope wrapped in natural rubber which is in turn helically wrapped with a narrow width of fabric and coated with a lubricant.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29744181A | 1981-08-28 | 1981-08-28 | |
| US297,441 | 1981-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1175325A true CA1175325A (en) | 1984-10-02 |
Family
ID=23146323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000407457A Expired CA1175325A (en) | 1981-08-28 | 1982-07-16 | Insulated bead for a radial steel ply tire |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5839504A (en) |
| AR (1) | AR231508A1 (en) |
| CA (1) | CA1175325A (en) |
| DE (1) | DE3231834A1 (en) |
| ES (1) | ES276128Y (en) |
| FR (1) | FR2511953B1 (en) |
| GB (1) | GB2104461A (en) |
| IN (1) | IN158515B (en) |
| IT (1) | IT1151946B (en) |
| LU (1) | LU84355A1 (en) |
| MA (1) | MA19578A1 (en) |
| MX (1) | MX157288A (en) |
| PT (1) | PT75469B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2123360A (en) * | 1982-07-13 | 1984-02-01 | Dunlop Ltd | Tyre bead reinforcements |
| DE3808278A1 (en) * | 1988-03-12 | 1989-09-21 | Uniroyal Englebert Gmbh | VEHICLE TIRES |
| JP2523189B2 (en) * | 1989-08-28 | 1996-08-07 | 新田ゼラチン株式会社 | Method for producing non-coagulable gelatin |
| JPH09207525A (en) * | 1996-02-09 | 1997-08-12 | Aichi Tire Kogyo Kk | Pneumatic type cushion tire |
| US6827115B1 (en) * | 1999-10-18 | 2004-12-07 | John See Van Hoose | Bead construction |
| US6964719B1 (en) * | 1999-10-18 | 2005-11-15 | The Goodyear Tire & Rubber Company | Process for manufacturing tires |
| JP2002192921A (en) | 2000-11-20 | 2002-07-10 | Goodyear Tire & Rubber Co:The | Spiral hexagonal bead and manufacturing method |
| FR2976222B1 (en) * | 2011-06-07 | 2016-07-01 | Soc De Tech Michelin | PNEUMATIC BOURRELET FOR HEAVY VEHICLE TYPE GENIE CIVIL |
| US11673431B2 (en) | 2018-05-30 | 2023-06-13 | Compagnie Generale Des Etablissements Michelin | Truck tire with contention armature overlap |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR566315A (en) * | 1923-05-16 | 1924-02-13 | Improvements in the manufacture of tire beads | |
| US1749899A (en) * | 1927-04-05 | 1930-03-11 | Nat Standard Co | Reenforcement for tire beads |
| US2053519A (en) * | 1936-05-25 | 1936-09-08 | Nat Standard Co | Tire bead |
| US2904095A (en) * | 1956-11-01 | 1959-09-15 | Us Rubber Co | Tire bead construction |
| US2952293A (en) * | 1957-07-31 | 1960-09-13 | Goodrich Co B F | Tire bead grommet |
| BE622364A (en) * | 1961-10-23 | |||
| FR1473142A (en) * | 1966-01-17 | 1967-03-17 | Dunlop Sa | Improvements in the manufacture of pneumatic tires |
| GB1243187A (en) * | 1967-12-01 | 1971-08-18 | Dunlop Holdings Ltd | Improvements in or relating to the manufacture of pneumatic tyres |
| GB1375367A (en) * | 1971-05-15 | 1974-11-27 | ||
| FR2220396B1 (en) * | 1973-03-07 | 1977-07-08 | Michelin & Cie | |
| AU7625274A (en) * | 1973-12-18 | 1976-06-10 | Avon Rubber Co Ltd | Tubeless tyres |
| GB1576424A (en) * | 1976-03-05 | 1980-10-08 | Dunlop Ltd | Beads for pneumatic tyres |
| IT1124863B (en) * | 1979-10-31 | 1986-05-14 | Pirelli | TIRES HEEL IMPROVEMENT |
-
1982
- 1982-07-16 CA CA000407457A patent/CA1175325A/en not_active Expired
- 1982-07-19 IN IN544/DEL/82A patent/IN158515B/en unknown
- 1982-08-05 JP JP57135786A patent/JPS5839504A/en active Pending
- 1982-08-19 IT IT22905/82A patent/IT1151946B/en active
- 1982-08-24 MA MA19790A patent/MA19578A1/en unknown
- 1982-08-24 AR AR290406A patent/AR231508A1/en active
- 1982-08-25 LU LU84355A patent/LU84355A1/en unknown
- 1982-08-26 DE DE19823231834 patent/DE3231834A1/en active Granted
- 1982-08-26 FR FR8214636A patent/FR2511953B1/en not_active Expired
- 1982-08-26 PT PT75469A patent/PT75469B/en unknown
- 1982-08-27 ES ES1982276128U patent/ES276128Y/en not_active Expired
- 1982-08-27 GB GB08224697A patent/GB2104461A/en not_active Withdrawn
- 1982-08-27 MX MX194181A patent/MX157288A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| LU84355A1 (en) | 1983-06-07 |
| MX157288A (en) | 1988-10-31 |
| PT75469B (en) | 1984-08-20 |
| ES276128Y (en) | 1985-02-16 |
| JPS5839504A (en) | 1983-03-08 |
| PT75469A (en) | 1982-09-01 |
| DE3231834C2 (en) | 1989-06-29 |
| DE3231834A1 (en) | 1983-03-17 |
| MA19578A1 (en) | 1983-04-01 |
| GB2104461A (en) | 1983-03-09 |
| FR2511953A1 (en) | 1983-03-04 |
| ES276128U (en) | 1984-07-16 |
| FR2511953B1 (en) | 1985-10-25 |
| AR231508A1 (en) | 1984-12-28 |
| IT1151946B (en) | 1986-12-24 |
| IN158515B (en) | 1986-11-29 |
| IT8222905A0 (en) | 1982-08-19 |
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| MKEC | Expiry (correction) | ||
| MKEX | Expiry |