CA1165673A - Tire liner - Google Patents
Tire linerInfo
- Publication number
- CA1165673A CA1165673A CA000400872A CA400872A CA1165673A CA 1165673 A CA1165673 A CA 1165673A CA 000400872 A CA000400872 A CA 000400872A CA 400872 A CA400872 A CA 400872A CA 1165673 A CA1165673 A CA 1165673A
- Authority
- CA
- Canada
- Prior art keywords
- casing
- tire
- strip
- inner tube
- liner
- 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
Landscapes
- Tyre Moulding (AREA)
- Tires In General (AREA)
Abstract
PRICE 4.1-5 IMPROVED TIRE LINER
ABSTRACT OF THE DISCLOSURE
An improved tire liner composed of high tempera-ture and pressure (HPT) molded and vulcanized rubber with a cross-section having two opposite long sides and two opposite short sides is described. One long side of the liner to be positioned across the U-shaped surface of the tire casing or the inside air space of the casing is beveled along its edges so that it tapers into the short sides. In some instances both long sides are tapered along the edges into the short sides. The tire liner reduces flat tires caused by punctures through the tire casing.
ABSTRACT OF THE DISCLOSURE
An improved tire liner composed of high tempera-ture and pressure (HPT) molded and vulcanized rubber with a cross-section having two opposite long sides and two opposite short sides is described. One long side of the liner to be positioned across the U-shaped surface of the tire casing or the inside air space of the casing is beveled along its edges so that it tapers into the short sides. In some instances both long sides are tapered along the edges into the short sides. The tire liner reduces flat tires caused by punctures through the tire casing.
Description
An improved tire liner incorporating high temperature and pressure (HPT) molded and vulcanized rubber is described. The liner is adap-ted to fit into a tire casing to prevent flat tires.
The prior art has described many different types of tire liners some of which are discussed in my Canadian Patent No. 1,129,327, issued August 10, 1982. One tire liner particularly related to the present invention which is nok discussed in the prior application is described in U.S.
Patent No. 1,181,065 to Coffield (1916). As can be seen from Figure 2 of this patent, a rubber liner is described which is premolded to conform to the shape of the U-shaped cross-section o~ the tire caslng. It is believed that the rubber of Coffield was not molded under high pressures or temperatures, and thus was relatively soft. Also the Coffield type liner is not bent into place by the aired inner tube because of its pre-molded shape. It has been found by applicant that without this bending by the inner tube or by vulcanizing the liner to the tire casing, the tire liner - -does not "lock" or tightly grip the tire casing. As a result the liner is believed ~o tend to work loose and/or slip during rotation of the tire particularly during acceleration and deceleration, and thereby injure the casing or inner tube due to heat and friction. ~pplicant's liners as described in Canadian Patent No. 1,129,327 have been found to be free from the problem of heat buildup and friction. The liner is preferably built to fit just in the triad area (opposite) thus staying away from the high flex area of th~ tire thereby allowing the heat caused by flexing to disperse through the wheel assembly of the tire. This problem is believed to be the reason that the Coffield type tire liner did not gain acceptance by the prior art.
One aspect of the prevent invention resides in an annular shaped tire liner adapted to fit around and in contact with the inside of a casing which is part of a pneumatic tire and around and in contact with the outside of the inner tube for -the tire so as to be between the inner ~ sb~ ~ ~
tube and the casing and to be vulcanized to the inside of the casing without an inner tube to reduce the ~requency of flat tires whereln the casing has a generally U-shaped surface inside and wherein the tire has spaced apart annular sidewalls supporting a tread. An annular strip of high temperature and pressure molded and vulcanized rubber is provided with two opposite long sides and two opposite short sides so that the strip has a width defined by -the two opposite long sides and a thickness along the length between the two opposite short sides which provides for substantial pro-tection against and resistance to penetration of the inside casing by a foreign object. The annular strip is in compression by the casing and is bent into the U-shape of the casing adjacent the tread when positioned in the casing by the inner tube and by vulcanizing to the casing without an inner tube and tends to straighten when outside of the casing thus holding the liner in position in the casing in use. A portion of one long side of the strip, which is to be in contact with the tire casing or the inside of the casing adjacent each of the short sides, has tapered edges into the short sides.
Another aspect of the invention resides in the method of forming an annular shaped tire liner from a high temperature and pressure molded and vulcanized rubber strip adapted to fit around and in contact with the inside of a casing which is part of a pneumatic tire and around and in - contact with the outside of an inner tube for the tire so as to be between the inner tube and the casing and to be vulcanized to the inside of the casing without an inner tube to reduce the frequency of flat tires. The casing has a generally U-shaped surEace inside and the tire has spaced apart annular sidewalls supporting a tread. The method includes the steps of providing a strip of rubber having generally four sided cross-section such that there are two opposite long sides and two opposite short sides, and bevelling at least the long side of the strip to be adjacent the tread of the tire casing or the inside of the casing with sb/ ~
~ ~51~73 a rubber cutting means in the short sides.
It is therefore an ob~ect of ~he presen~ invention to provide an improved tire liner of the kin~ which bends into the tire casing when forced in-to position b~ the aired inner tube or when vulcanized to the tire casing -thus tending to "lock" the liner into place in the tire casing and which tends -to straighten or flatten when outside of the tire casing. Further it is an object of the present invention to provide a tire liner and method for its production which is simple and economical. These and o-ther objects will become increasingly apparent by reference to the following description and the drawings.
In the Drawings Figure 1 is a front partial cross-sectional projection view of a HPT rubber strip of a tire liner with the long sides tapered into the shor-t sides as shown inside broken lines which show material removed by the method from a rectangular cross-sectioned strip by bevelling;
Figure 2 is a partial side cross-sectional pro-jection view of the rubber strip of Figure 1 showing the annular ring in dotted lines and a joint across the strip;
Figure 3 is a front cross-sectional view of the tire liner of Figures 1 and 2 bent into a tire casing by an inner tube and not vulcanized to the casing, wherein the tire is mounted on a conventional rim;
Figure 4 is a front cross-sectional view showing a tire liner in a casing vulcani~ed to the casing; and Figure 5 is a front cross-sectional view of a tire liner which is tapered at four (4) different angles across the surfaces o~ the long side which is to be bent into contact with the inside of the tire casing.
~eneral Description ~ .
The present invention relates to an annular shaped tire liner adapted to fit around and in contact with the inside of a casing which is part of a pneumatic tire and around and in contact wi-th the outside of an inner tube for the tire so as to be between the inner tube and the casing sb/~~
~,. .
~ ~5~73 and to be vulcan:ized to the inslde of the casl~g without an inner tube to reduce the frequency of flat tires wherein the casing has a generally U-shaped surface insi~e and whexein the casing has spaced apart annular sidewalls supporting a tread the improvement which comprises: an annular strip of high temperature and pressure molded and vulcanized rubber with two opposike long sides and two opposite short sides, wherein the strip has a width defined by the -two opposite long sides and a thickness along.the length between two opposite short sides which provides for substan-tial protection against and resistance to penet~ation of the inside of the casing by a foreign object, wherein the an~ular strip is in compression by the casing and is bent into the U-shape of the casing adjacent the tread when positioned in the casing by the aired inner tube and by vulcanizing to the casing without an inner tube and tends to straighten when outside of the casing thus holdin~ the liner in position in the casing in use and, wherein a portion of one lon~ side of the strip which is to be in contact with the tire casing or the inside of the casing adjacent each of the short sides has tapered edges into the short sides.
The present invention further relates to the improved method of forming an annular shaped tire liner from a high temperature and pressure molded and vulcaniæed .rubber strip which is adapted to fit around and in.contact with thè inside of a casing which is part of a pneumatic tire and around and in contact with the outside of an inner tube for the tire so as to be between the inner tube and the casing and to be vulcanized to the casing without an inner tube to reduce the frequency of flat tires wherein the casing has a generally U~shaped surface inside and wherein the tire has spaced apart annular sidewalls supporting a tread which comprises providing a strip of the rubber having a generally four sided cross-section such that there are two opposite long sides and two opposite short sides; and bevel~ng at least the long side of the strip to be adjacent the tread of the -tire casing or the inside of the casing with a rubber ,~ sb~;
~ ~5~73 cutting or buffincJ means in-to the short sides.
The composition and method of formation of the HPT
molded and vulcanized rubber is described in Canadian Paten-t No. 1,129,327. Preferably, the rubber is "precured" as a flat strip with a rectangular cross-section, i.e. molded and hea-t vulcanized at 21 to 70.3 kg per sq. cm. at temperatures above about 149C. Also various rubber bonding or vulcanizing methods are described in this prior application.
These rubber processing methods are known to those skilled in the art.
Specific Description As shown in Figure 1, a flat rectangular strip 10 of precured tread type rubber having the cross-section shown in Figure 1 with the bro]~en lines 11 (Bandag Inc., Muscatine, Iowa) measuring 7 inches (12.8 cm) width by 1/2 inch (1.3 cm) thick was used. The long sides lOa and lOb provide the width and the short sides lOc provide the thickness of the finished tire liner. The strip 10 optionally has a tread pattern lOd.
The long side lOa to be next to the tire casing was beveled towards the short side lOc usin~ a rubber buffing wheel to a taper of about 1 1/2 inches (3.8 cm) wide and at an angle of about 15 to the side lOa to form tapered sur~aces 12.
The short sides were reduced in thickness to about 1/8 inch (0.32 cm). The ends lOe of the strip 10 Figure 2, were then joined toge-ther *o form an annular strip using a thin strip 14 of "cushion" type rubber with an adhesive for bonding as described in Canadian Patent No. 1,129,32.7. The ends lOe were also stapled 20 as shown in Figure 2 to hold them in place for curing. The ends lOe were vulcanized together using a conventional inner tube repair device, which consists of two heated metal plates one on the top ànd one on the bottom of the splice (not shown). Pressure was placed on the plates and then they were heated at 298F and 35 psig for 20 minutes. The staples 20 were then removed to prevent them from injuring the inner tube 22 and tire casing 21 when the liner 10 was in use.
It was found that the tread pattern lOd did not maXe any dif~erence in use and thereafter plain or "slick"
Sb/~
.~ .~ . .
5 ~7 3 rubber with no pattern was used. In sorne inst~nces the long side lOb to be adjacent the inner tube 22 was also slightly beveled to provide tapered surfaces 13 to prevent injury to the inner tube because of sharp edges. The tapered surfaces 13 on side lOa were roughened by the rubber cutting means.
It will be recognized that various means can be used to hold the ends lOe of the strip 10 together during vulcanizing of the ends lOc. The staples 20 provide a convenient means for holding the splice together.
Figure 3 shows the annular tire liner 10 bent into position in the casing 21 by the inner tube 22 when the tube 22 and casing 21 are mounted on a rim 24. The tire liner 10 performed well in service. Figure 4 shows a ti~e liner 30 in a casing 21 vulcanized to the casing with cushion rubber 31 with the tapered surfaces 32 on either side. Figure 5 shows a liner 40 w~lerein the long side has 'our ~4) angles (t-~o at 30 and two at 15). This provides a more rounded cross-section.
The flat rectangular strip could be formed into a ring and then the long side(s) beveled. Also it will be appreciated that the tire liner cou~d be precured as a ring without a joint or splice prior to beveling.
Finally, it will be appreciated tha-t the beveled or tapered side can be facing the air space inside of the casing 21 rather than the U-shaped surface. This means that the liner 10 shown in Figure 3 is turned over in -the casing 21 - It will be appreciated that a curved annular template can be made, such as by cutting out the tread and shoulder area of a tire that is the same size as the liner being produced, and placing a liner in the template so that the edges of the liner can be buffed or cut to form a smooth good fitting tire liner.
sb~ ~
~. .
The prior art has described many different types of tire liners some of which are discussed in my Canadian Patent No. 1,129,327, issued August 10, 1982. One tire liner particularly related to the present invention which is nok discussed in the prior application is described in U.S.
Patent No. 1,181,065 to Coffield (1916). As can be seen from Figure 2 of this patent, a rubber liner is described which is premolded to conform to the shape of the U-shaped cross-section o~ the tire caslng. It is believed that the rubber of Coffield was not molded under high pressures or temperatures, and thus was relatively soft. Also the Coffield type liner is not bent into place by the aired inner tube because of its pre-molded shape. It has been found by applicant that without this bending by the inner tube or by vulcanizing the liner to the tire casing, the tire liner - -does not "lock" or tightly grip the tire casing. As a result the liner is believed ~o tend to work loose and/or slip during rotation of the tire particularly during acceleration and deceleration, and thereby injure the casing or inner tube due to heat and friction. ~pplicant's liners as described in Canadian Patent No. 1,129,327 have been found to be free from the problem of heat buildup and friction. The liner is preferably built to fit just in the triad area (opposite) thus staying away from the high flex area of th~ tire thereby allowing the heat caused by flexing to disperse through the wheel assembly of the tire. This problem is believed to be the reason that the Coffield type tire liner did not gain acceptance by the prior art.
One aspect of the prevent invention resides in an annular shaped tire liner adapted to fit around and in contact with the inside of a casing which is part of a pneumatic tire and around and in contact with the outside of the inner tube for -the tire so as to be between the inner ~ sb~ ~ ~
tube and the casing and to be vulcanized to the inside of the casing without an inner tube to reduce the ~requency of flat tires whereln the casing has a generally U-shaped surface inside and wherein the tire has spaced apart annular sidewalls supporting a tread. An annular strip of high temperature and pressure molded and vulcanized rubber is provided with two opposite long sides and two opposite short sides so that the strip has a width defined by -the two opposite long sides and a thickness along the length between the two opposite short sides which provides for substantial pro-tection against and resistance to penetration of the inside casing by a foreign object. The annular strip is in compression by the casing and is bent into the U-shape of the casing adjacent the tread when positioned in the casing by the inner tube and by vulcanizing to the casing without an inner tube and tends to straighten when outside of the casing thus holding the liner in position in the casing in use. A portion of one long side of the strip, which is to be in contact with the tire casing or the inside of the casing adjacent each of the short sides, has tapered edges into the short sides.
Another aspect of the invention resides in the method of forming an annular shaped tire liner from a high temperature and pressure molded and vulcanized rubber strip adapted to fit around and in contact with the inside of a casing which is part of a pneumatic tire and around and in - contact with the outside of an inner tube for the tire so as to be between the inner tube and the casing and to be vulcanized to the inside of the casing without an inner tube to reduce the frequency of flat tires. The casing has a generally U-shaped surEace inside and the tire has spaced apart annular sidewalls supporting a tread. The method includes the steps of providing a strip of rubber having generally four sided cross-section such that there are two opposite long sides and two opposite short sides, and bevelling at least the long side of the strip to be adjacent the tread of the tire casing or the inside of the casing with sb/ ~
~ ~51~73 a rubber cutting means in the short sides.
It is therefore an ob~ect of ~he presen~ invention to provide an improved tire liner of the kin~ which bends into the tire casing when forced in-to position b~ the aired inner tube or when vulcanized to the tire casing -thus tending to "lock" the liner into place in the tire casing and which tends -to straighten or flatten when outside of the tire casing. Further it is an object of the present invention to provide a tire liner and method for its production which is simple and economical. These and o-ther objects will become increasingly apparent by reference to the following description and the drawings.
In the Drawings Figure 1 is a front partial cross-sectional projection view of a HPT rubber strip of a tire liner with the long sides tapered into the shor-t sides as shown inside broken lines which show material removed by the method from a rectangular cross-sectioned strip by bevelling;
Figure 2 is a partial side cross-sectional pro-jection view of the rubber strip of Figure 1 showing the annular ring in dotted lines and a joint across the strip;
Figure 3 is a front cross-sectional view of the tire liner of Figures 1 and 2 bent into a tire casing by an inner tube and not vulcanized to the casing, wherein the tire is mounted on a conventional rim;
Figure 4 is a front cross-sectional view showing a tire liner in a casing vulcani~ed to the casing; and Figure 5 is a front cross-sectional view of a tire liner which is tapered at four (4) different angles across the surfaces o~ the long side which is to be bent into contact with the inside of the tire casing.
~eneral Description ~ .
The present invention relates to an annular shaped tire liner adapted to fit around and in contact with the inside of a casing which is part of a pneumatic tire and around and in contact wi-th the outside of an inner tube for the tire so as to be between the inner tube and the casing sb/~~
~,. .
~ ~5~73 and to be vulcan:ized to the inslde of the casl~g without an inner tube to reduce the frequency of flat tires wherein the casing has a generally U-shaped surface insi~e and whexein the casing has spaced apart annular sidewalls supporting a tread the improvement which comprises: an annular strip of high temperature and pressure molded and vulcanized rubber with two opposike long sides and two opposite short sides, wherein the strip has a width defined by the -two opposite long sides and a thickness along.the length between two opposite short sides which provides for substan-tial protection against and resistance to penet~ation of the inside of the casing by a foreign object, wherein the an~ular strip is in compression by the casing and is bent into the U-shape of the casing adjacent the tread when positioned in the casing by the aired inner tube and by vulcanizing to the casing without an inner tube and tends to straighten when outside of the casing thus holdin~ the liner in position in the casing in use and, wherein a portion of one lon~ side of the strip which is to be in contact with the tire casing or the inside of the casing adjacent each of the short sides has tapered edges into the short sides.
The present invention further relates to the improved method of forming an annular shaped tire liner from a high temperature and pressure molded and vulcaniæed .rubber strip which is adapted to fit around and in.contact with thè inside of a casing which is part of a pneumatic tire and around and in contact with the outside of an inner tube for the tire so as to be between the inner tube and the casing and to be vulcanized to the casing without an inner tube to reduce the frequency of flat tires wherein the casing has a generally U~shaped surface inside and wherein the tire has spaced apart annular sidewalls supporting a tread which comprises providing a strip of the rubber having a generally four sided cross-section such that there are two opposite long sides and two opposite short sides; and bevel~ng at least the long side of the strip to be adjacent the tread of the -tire casing or the inside of the casing with a rubber ,~ sb~;
~ ~5~73 cutting or buffincJ means in-to the short sides.
The composition and method of formation of the HPT
molded and vulcanized rubber is described in Canadian Paten-t No. 1,129,327. Preferably, the rubber is "precured" as a flat strip with a rectangular cross-section, i.e. molded and hea-t vulcanized at 21 to 70.3 kg per sq. cm. at temperatures above about 149C. Also various rubber bonding or vulcanizing methods are described in this prior application.
These rubber processing methods are known to those skilled in the art.
Specific Description As shown in Figure 1, a flat rectangular strip 10 of precured tread type rubber having the cross-section shown in Figure 1 with the bro]~en lines 11 (Bandag Inc., Muscatine, Iowa) measuring 7 inches (12.8 cm) width by 1/2 inch (1.3 cm) thick was used. The long sides lOa and lOb provide the width and the short sides lOc provide the thickness of the finished tire liner. The strip 10 optionally has a tread pattern lOd.
The long side lOa to be next to the tire casing was beveled towards the short side lOc usin~ a rubber buffing wheel to a taper of about 1 1/2 inches (3.8 cm) wide and at an angle of about 15 to the side lOa to form tapered sur~aces 12.
The short sides were reduced in thickness to about 1/8 inch (0.32 cm). The ends lOe of the strip 10 Figure 2, were then joined toge-ther *o form an annular strip using a thin strip 14 of "cushion" type rubber with an adhesive for bonding as described in Canadian Patent No. 1,129,32.7. The ends lOe were also stapled 20 as shown in Figure 2 to hold them in place for curing. The ends lOe were vulcanized together using a conventional inner tube repair device, which consists of two heated metal plates one on the top ànd one on the bottom of the splice (not shown). Pressure was placed on the plates and then they were heated at 298F and 35 psig for 20 minutes. The staples 20 were then removed to prevent them from injuring the inner tube 22 and tire casing 21 when the liner 10 was in use.
It was found that the tread pattern lOd did not maXe any dif~erence in use and thereafter plain or "slick"
Sb/~
.~ .~ . .
5 ~7 3 rubber with no pattern was used. In sorne inst~nces the long side lOb to be adjacent the inner tube 22 was also slightly beveled to provide tapered surfaces 13 to prevent injury to the inner tube because of sharp edges. The tapered surfaces 13 on side lOa were roughened by the rubber cutting means.
It will be recognized that various means can be used to hold the ends lOe of the strip 10 together during vulcanizing of the ends lOc. The staples 20 provide a convenient means for holding the splice together.
Figure 3 shows the annular tire liner 10 bent into position in the casing 21 by the inner tube 22 when the tube 22 and casing 21 are mounted on a rim 24. The tire liner 10 performed well in service. Figure 4 shows a ti~e liner 30 in a casing 21 vulcanized to the casing with cushion rubber 31 with the tapered surfaces 32 on either side. Figure 5 shows a liner 40 w~lerein the long side has 'our ~4) angles (t-~o at 30 and two at 15). This provides a more rounded cross-section.
The flat rectangular strip could be formed into a ring and then the long side(s) beveled. Also it will be appreciated that the tire liner cou~d be precured as a ring without a joint or splice prior to beveling.
Finally, it will be appreciated tha-t the beveled or tapered side can be facing the air space inside of the casing 21 rather than the U-shaped surface. This means that the liner 10 shown in Figure 3 is turned over in -the casing 21 - It will be appreciated that a curved annular template can be made, such as by cutting out the tread and shoulder area of a tire that is the same size as the liner being produced, and placing a liner in the template so that the edges of the liner can be buffed or cut to form a smooth good fitting tire liner.
sb~ ~
~. .
Claims (11)
- I CLAIM:
In an annular shaped tire liner adapted to fit around and in contact with the inside of a casing which is part of a pneumatic tire and around and in contact with the outside of an inner tube for the tire so as to be between the inner tube and the casing and to be vulcanized to the inside of the casing without an inner tube to reduce the frequency of flat tires wherein the casing has a generally U-shaped surface inside and wherein the tire has spaced apart annular sidewalls supporting a tread the improve-ment which comprises:
an annular strip of high temperature and pressure molded and vulcanized rubber with two opposite long sides and two opposite short sides, wherein the strip has a width defined by the two opposite long sides and a thickness along the length between the two opposite short sides which provides for substantial protection against and resistance to penetra-tion of the inside casing by a foreign object, wherein the annular strip is in compression by the casing and is bent into the U-shape of the casing adja-cent the tread when positioned in the casing by the inner tube and by vulcanizing to the casing without an inner tube and tends to straighten when outside of the casing thus holding the liner in position in the casing in use, and wherein a portion of one long side of the strip which is to be in contact with the tire casing or the inside of the casing adjacent each of the short sides has tapered edges into the short sides. - In an annular shaped tire liner adapted to fit around and in contact with the inside of a casing which is part of a pneumatic tire and around and in contact with the outside of an inner tube for the tire so as to be between the inner tube and the casing without being attached to reduce the frequency of flat tires wherein the casing has a generally U-shaped surface inside and wherein the tire has spaced apart annular sidewalls supporting a tread the improvement which comprises:
(a) an annular strip of high temperature and pressure molded and vulcanized rubber defining an annular length and with a cross-section having two opposite long sides and two opposite short sides;
wherein the strip has a width defined by the two opposite long sides and a thickness along the length between the two opposite short sides which provides for substantial protection against and resistance to penetration of the inside of the casing by a foreign object and having at least one joint across the width of the strip;
wherein the annular strip is in compression in the casing and is bent into the U-shape of the casing adjacent the tread when positioned in the casing by the inner tube and tends to straighten when outside of the casing thus holding the liner in position in the casing in use, and wherein a portion of one long side of the strip which is to be in contact with the tire casing or the inside of the casing adjacent each of the short sides has been beveled by a rubber cutting means to provide tapered edges into the short sides; and (b) a thin section of a low temperature and pressure vulcanized rubber material in a joint across the annular strip. - The tire liner of Claims 1 or 2 wherein the rubber is high temperature and pressure molded and vulcanized rubber has been molded and vulcanized under a pressure of about 21 to 70.3 kg per sq cm and at a temperature above about 149°C as a flat rectangular cross-sectional strip and formed into the annular strip.
- The tire liner of Claims 1 or 2 bent and vulcanized to the U-shaped surface of the tire casing which is mounted on a wheel rim without an inner tube.
- The tire liner of Claims 1 or 2 bent and held against the U-shaped surface of the tire casing without vulcanizing to the casing and with the inner tube against the liner and with the tire and inner tube mounted on a wheel rim.
- The tire liner of Claim 2 wherein in addition the long side to be adjacent the inner tube is also beveled.
- In the method of forming an annular shaped tire liner from a high temperature and pressure molded and vulcanized rubber strip adapted to fit around and in con-tact with the inside of a casing which is part of a pneumatic tire and around and in contact with the outside of an inner tube for the tire so as to be between the inner tube and the casing and to be vulcanized to the inside of the casing without an inner tube to reduce the frequency of flat tires wherein the casing has a generally U-shaped surface inside and wherein the tire has spaced apart annular side-walls supporting a tread the improvement which comprises providing a strip of the rubber having generally four sided cross-section such that there are two opposite long sides and two opposite short sides; and bevelling at least the long side of the strip to be adjacent the tread of the tire casing or the inside of the casing with a rubber cutting means into the short sides.
- -8-The method of Claim 7 wherein a flat rectangular cross-sectioned strip with opposite ends adapted to be joined together to form the annular liner is beveled and then the ends are joined together to form the tire liner.
- The method of Claim 7 wherein a flat rectangular cross-section strip of rubber is formed into an annular ring with opposite ends joined together and then the ring is beveled to form the tire liner.
- The method of Claim 7 wherein the cutting means is a rubber grinding wheel.
- 11. In the method of forming an annular shaped tire liner from a high temperature and pressure molded and vulcanized rubber strip adapted to fit around and in contact with the inside of a casing which is part of a pneumatic tire and around and in contact with the outside of an inner tube for the tire so as to between the inner tube and -the casing and to be vulcanized to the inside of the casing without an inner tube to reduce the frequency of flat tires wherein the casing has a generally U-shaped surface inside and wherein the tire has spaced apart annular sidewalls supporting a tread the improvement which comprises providing a strip of the rubber having generally four sided cross-section such that there are two opposite long sides and two opposite short sides; and beveling at least the long side of the strip to be adjacent the tread of the tire casing or the inside of the casing with a rubber cutting means into the short sides wherein the strip provides substantial protection against and resistance to penetration to the inside of the casing through the tread by a foreign object and wherein the strip is in compression in the casing and is bent in the U-shape of the inside of the casing and tends to straighten outside of the casing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/253,102 US4347884A (en) | 1979-06-25 | 1981-04-13 | Tire liner and method of preparation |
| US253,102 | 1981-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1165673A true CA1165673A (en) | 1984-04-17 |
Family
ID=22958863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000400872A Expired CA1165673A (en) | 1981-04-13 | 1982-04-13 | Tire liner |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1165673A (en) |
| ZA (1) | ZA822449B (en) |
-
1982
- 1982-04-08 ZA ZA822449A patent/ZA822449B/en unknown
- 1982-04-13 CA CA000400872A patent/CA1165673A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ZA822449B (en) | 1983-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4347884A (en) | Tire liner and method of preparation | |
| JP2901404B2 (en) | Replacement tread | |
| EP0730950A2 (en) | Retreaded tires and method for making the same without spray cement | |
| WO2008054387A9 (en) | Method for improved retread endurance | |
| US3925129A (en) | Tire retreading system | |
| US3883382A (en) | Method and apparatuses for retreading worn tires | |
| US2774409A (en) | Method of making skid-resistant tire | |
| US4626300A (en) | Method and apparatus for vulcanizing retreaded tires | |
| CA1322638C (en) | Method and apparatus for replacing sidewall of tire | |
| US4375231A (en) | Tire repair construction and method | |
| CA1165673A (en) | Tire liner | |
| US3964949A (en) | Method of treading tires | |
| JP2764610B2 (en) | Pneumatic radial tire with grinding limit mark | |
| CA1243155A (en) | Tire envelope sealing apparatus for recapping tires | |
| US4836930A (en) | Method of repairing vehicular tires | |
| CA1236666A (en) | Tire envelope sealing apparatus for recapping tires | |
| US4978403A (en) | Tire repair method using solid mandrel halves | |
| US5695581A (en) | Method for trimming the shoulder areas of retreaded tires | |
| US3326261A (en) | Tires | |
| CA1060614A (en) | Method for treading tyres | |
| US4239075A (en) | Profiled tire tread | |
| EP0189826B2 (en) | Tire retreading method, including removal and replacement of steel belted plies | |
| US4303114A (en) | Method for the construction of improved tire liners | |
| US4415013A (en) | Repair for the tire separations | |
| WO1992008603A1 (en) | Method for rebelting tires |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |