Abstract: A method for providing a seal in an annular space between a rehabilitative pipe liner and a conduit wall is provided. Areas on the surface of a section of a conduit wall surrounding lateral connections are provided with an expandable sealing agent, preferably during an investigative and/or cleaning inspection of the conduit section and preferably without repeated withdrawal and insertion of equipment between the provision of the agent at successive lateral connections. The rehabilitative pipe liner is then installed in the conduit section and a curing agent or agents such as heat, visible light, ultraviolet light, chemical agents, sonic energy or other radiant energy means is applied to cure or form the rehabilitative pipe liner and to cause the expandable sealing agent to expand and fill at least a portion of the annular space that may exist between the rehabilitative pipe liner and the conduit wall.

Abstract: A method of splicing together the ends of two lengths of drip irrigation tape is disclosed in which a tubular insert having an inner layer of high melting point material and an outer layer of bonding material is placed into the end of a first length of drip irrigation tape so that a portion of the insert projects outwardly from the end of the tape. The end of a second length of drip irrigation tape is then placed over the projecting end of the tubular insert so that the two tape ends are butted up against one another or close to one another. Both lengths of tape are then sealed to the outer bonding layer of the insert.

Abstract: An apparatus for applying tread material onto a tire is provided and applies uncured tread material to the carcass of a tire having a tread surface and a flank. The apparatus includes an extruder for extruding a selected one of a rubber and a synthetic material mixture and a first applicator device orientable toward the tread surface of the carcass. The apparatus also includes a second applicator device disposed adjacent the first applicator device and orientable toward the flank of the carcass. The apparatus further includes an extrusion nozzle extending between the first applicator device and the second applicator device for passage therethrough of the mixture extruded by the extruder.

Abstract: A method for making a composite lined tube is disclosed, wherein the tube has end couplings on it. The method includes pressing a resin impregnated fiber preform progressively along an inner wall of the tube. In one embodiment, the method includes inserting an inflatable bladder into the tube. The bladder is adapted to inflate along a length thereof on application of increasing pressure to the interior of the bladder. The bladder has disposed on its exterior surface the fiber preform impregnated with resin which is adapted to fit within the tube. One end of the preform is secured to one end of the tube. The bladder is then inflated along its length by applying increasing pressure to the bladder. The preform is clamped to a shoulder of one of the couplings at another end of the tube, and the end of the preform is trimmed to conform to the shoulder. Pressure is maintained in the bladder while curing the resin. In one particular embodiment, the bladder is inflated from its center outwardly to its ends.

Abstract: The present invention broadly comprises a construction material constructed from a plurality of flexible strips, the strips are helically wound upon one another to form a cylindrical pole. The pole may incorporate bolts, nails, screws and polymers for securing the flexible strips to one another. The construction material is generally constructed from discarded tires and may comprise a utility pole, a guardrail, a signpost and may be suitable for many other construction applications.

Abstract: A steel reinforced rubber plank made from discarded or scrap tires. The sidewalls and bead are removed from a scrap tire. The remaining belt is cut open to form a rubber strip. Next, the rubber strips are buffed to provide a better bonding surface. Then the bonding agents are applied to the treaded side of each rubber strip, each of the two strips are put together tread face to tread face to form a plank, pressed and heated until the two strips are completely vulcanized. The two-ply plank is then profiled into a final product.

Abstract: A process for fabricating cord-reinforced-rubber structural materials from used tires and a cord-reinforced-rubber structural material. The process includes the following steps for handling and treating the tires: removing the side walls from the tires; removing at least some of the tread material from the tire to provide an essentially uniform tread thickness; cutting the tires in a transverse direction to provide elongated strips of tire material having at least some inherent curvature; removing at least some of the inherent curvature by compressing the strips to at least about 100 psi and heating the strips to at least 200 degrees F to remove at least some of the inherent curvature; mating the strips with a gum rubber adhesive; and bonding the strips and gum rubber adhesive by compressing them to about 100 psi and heating them to at least 200 degrees F. By removing at least some of the inherent curvature the strips of rubber material are more easily handled during subsequent processing.

Abstract: A process for manufacturing structures from worn out tires and a parking stop made by that process. Sidewalls are cut from the tire leaving a circular strip, which is cut transversely to produce an elongated approximately rectangular strip. Spaced slits are cut into the long edges of the strips to form slats suitable for use in manufacturing structures. Two slats are bonded together in a face-to-face arrangement to form a unitary pair of bonded slats. Additional pairs of slats are then bonded to the first pair of slats. All slats are bonded with similar sides in contact; that is, tread side to tread side or inside to inside. The resulting beam can have adjacent corners removed to provide a parking stop configuration. Preferably, the slats are bonded with an elastomer or mechanical fasteners such as ring nails or staples. A thick elastomer, having a thickness of at least about ⅛ inch may be coated over the beam. Beams may be combined to form guard rails, walls, panels, etc.

Abstract: A re-treading method and an apparatus therefor, which are capable of winding a tread material on a base tire automatically and efficiently to realize an adequate joint condition of the leading and trailing edges of the tread material, are configured to take a photograph of a zone of the tread material including its cut position to compare the picture with a stored tread pattern image to detect a deviation amount between them, then moves the tread material or the cut position relative to each other by the deviation amount, next cut the tread material at the cut position after the relative movement, wind the tread material on a base tire, and unite the leading and trailing edges of the tread material.

Abstract: A method of measuring a gauge of used rubber portion of a buffed tire with an enhanced efficiency and high accuracy is disclosed, and in this method, workability of a buffing process can be improved. A buffing method is also disclosed which enhances a production efficiency of recaps, maintaining high levels of workability of the buffing process and quality of the recaps. An eddy-current sensor is used to measure a gauge g of used rubber portion or a thickness from an outer circumferential surface to a belt layer in a buffed tire to recap the tire, and voltages detected by the eddy-current sensor is converted in accordance with a conversion method designated to each of types of belt configuration to compute a real distance of the gauge of the used rubber portion.

Abstract: A precured tread for tire retreading is adhered to a platform tire to produce a retreaded tire. In the precured tread, a fin portion obliquely and outwardly extending substantially along a slant surface of the precured tread and thinning toward a top side thereof is formed on each of both widthwise end portions of an adhesion surface of the precured tread to be adhered to the platform tire. By using such a precured tread can effectively be controlled the separation failure while maintaining good appearance in the retreaded tire product.

Abstract: A probe and gauge system for determining the need for a simple one piece patch-plug, or a complex two piece repair. The probe is inserted into an injury in a tire such as a puncture hole and the angle of the hole, known as the injury angle, is calculated on the gauge to determine the need for a simple one piece patch-plug, or a complex two piece repair.

Abstract: A method for utilizing discarded tires is disclosed which creates strong, durable, posts, beams, mats, blocks or other structures. Used tires are cut and flattened and the sidewalls are removed. The tread sections of the tires are cleaned. Vulcanizing compound is then applied to adjacent inner surfaces of the tread sections to form a flat essential building element. These building elements may be vulcanized together in alternating horizontal and perpendicular layers to form flat blocks, mats, noise or safety barriers, or other structures. The essential building elements are flat and form structures which have flat upper and lower surfaces and a rectangular cross-section. Beams may be formed by securing a number of the essential building elements together to form structures that are approximately 8 feet high and have a rectangular cross-section.

Abstract: A process for manufacturing mats from worn out tires and mats made by that process. Sidewalls are cut from the tire leaving a circular strip, which is cut transversely to produce an elongated approximately rectangular strip. Spaced slits are cut into the long edges of the strips to form slats suitable for use in manufacturing structures. Several strips are placed together to form a first layer, than additional strips are laid over the first strips at an angle to the first layer strips to form a second layer an adhesive is placed on one of the mating surfaces to bond the layers together, forming a mat. An elastomer, may be coated over the mat The mats are particularly useful as horse stall mats, matts for cows in dairy farms, etc.

Abstract: An apparatus for recapping tires which includes a frame made up of two associated support structures, a first support structure including a mandrel for support of the tire, which mandrel rotates on a shaft, the mandrel being mounted for translation on the first support structure, and a second support structure to support tools for recapping of the tire, which tools are mounted for translation on the second support structure in a direction approximately perpendicular to the translation of the mandrel, characterized in that the direction of translation of the mandrel is parallel to the rotational shaft of the said mandrel.

Abstract: A method and apparatus for repairing concrete structures utilize a generally flat composite material insert. The insert is inserted into a slot formed in a preexisting section of concrete and bonded to the preexisting section using an adhesive. The insert is installed such that a portion of the insert extends beyond the preexisting structure and into a void where damaged concrete has been removed and where the new concrete is to be poured. The insert then functions to join the preexisting section and the new concrete section. Alternatively, the insert may comprise an extension to attach an external fixture to the concrete section. Alternatively, a slot can be created within two preexisting concrete sections, adhesive added to the slot, and an insert installed in the slot. Again, the insert functions to join the two concrete sections.

Abstract: Methods for fabricating laminations to form structural elements of predetermined shapes (120, 220, 420, 520, 620) are provided. Laminations include parts (22, 24) fabricated from the tread portion (42) of discarded rubber tires. The parts are typically arranged in layers with various relationships therebetween. The parts are pressed to remove all voids therebetween causing dynamic tension which creates rigidity and then bonded with methods including vulcanization, chemical vulcanization, epoxy and adhesive.

Abstract: Shock-absorbing blocks for bullet stops at firing ranges and for traffic trol are made by encasing scrap rubber tires in concrete. To ensure firm attachment of the tires to the concrete, reinforcements such as wire loops are fastened to the tire. To prevent the formation of air pockets during the pouring of the concrete mixture into a mold holding the tire, vent holes are punched into the side walls of the tire. To allow the concrete mixture to flow under the tire in the mold, the tire is propped up with support blocks. Wires may be strung across the top of the tire and attached to the side walls of the mold to prevent movement of the tire while the concrete is being poured into the mold. The concrete mixture may contain an aqueous foam additive, a stabilizer, and fiber reinforcements such as steel or organic polymers.

Abstract: A sealant composition especially useful for stopping punctures in vehicle tires includes: (a) a viscous fluid such as propylene glycol or polypropylene glycol; (b) one or more fibrous materials such as cellulose, wool, nylon, rayon, hair, wollastonite, rock-wool, glass wool fibers, polyester, polypropylene, or other material of like nature; and (c) flat plate-like particles, such as mica. In one embodiment, the composition is too viscous to be readily passed through a pneumatic tire valve stem, so the viscous product is installed into the tire while the tire is dismounted from the wheel. In another embodiment, the composition is made of two parts, each of which is sufficiently low in viscosity to pass readily through the valve stem, but which react on mixing inside the tire form a liquid of higher viscosity.

Abstract: A resilient support member is provided for supporting a sidewalk, road surface, etc. The support member is formed of tire particles and a polyurethane binder. The tire particles have a size such that 100% of the particles will pass through a three inch sieve and about 95% of the particles will be retained on a half-inch sieve. The tire particles form about 80% to 95% by weight of the support member and the polyurethane forms about 5% to 20% by weight of the support member.

Abstract: A pneumatic vehicle tire has two beads each having a bead core and a carcass of at least one layer anchored at the bead cores within the beads. The beads further have bead profiling members. A reinforcement structure is located radially outwardly of the carcass, and a tread is positioned radially outwardly of the reinforcement structure. The carcass is made of aramid cord fabric and the bead cores are made of aramid cords. The reinforcement structure is made of synthetic fiber-reinforced rubber or of aramid cords. The bead profiling members are made of rubber reinforced with synthetic fibers.

Abstract: Tire recapping or retreading apparatus and method including the use of a tread mold with a plurality of mold segments. A tread mold loading machine is used to position the prepared tire carcass relative to the mold segments and to install the mold segments on the exterior of the tire carcass. The mold segments are retained in place on the exterior of the tire carcass by a tension band. Resilient elastic tension bands or pre-stressed metal tension springs hold the mold segments on the tire carcass after the mold segments have been released from the tread mold loading machine. The use of the tread mold loading machine and the mold segments eliminates distortion of the tire carcass during installation of the tread mold.

Abstract: A radially expandable and contractible rim used to secure an annular elastomeric sealing ring to a tire bead during retreading of a tire.

Abstract: The invention concerns the structures and production of tubeless tire beads the seal of which on the rim and the resistance to degradation of which are increased. The beads, at least the surfaces of which in contact with the rim are formed of protectors (7), are covered, in accordance with the invention, with an air impermeable rubber mix (8) at least in part over the portion of the protector in contact with the rim. Extension of the covering (8) over the surface of the protector which is in contact with the inflation air is desirable.

Abstract: A general purpose laminated construction block element is constructed from discarded rubber-like material such as tire casings or belt conveyor straps. Tire casings are first cut open and laid flat to form flattened mats. The mats are then stacked and secured into blocks suitable for transport and storage. The blocks may be later disassembled and the individual mats spirally wound to form cylindrical posts. Alternately, the blocks may be used as formed for general purpose construction blocks. The properties of the laminated block can be adjusted by adjusting the properties of an adhesive which is applied to one surface of the mat prior to stacking. The laminated rubber blocks may be formed to predetermined sizes by appropriately preconfiguring the mat by juxtaposing or superposing multiple single tire mats. The laminated rubber-like blocks have excellent strength, impact and vibration absorbtion, and machinability.

Abstract: A pneumatic vehicle tire has two beads each having a bead core and a carcass of at least one layer anchored at the bead cores within the beads. The beads further have bead profiling members. A reinforcement structure is located radially outwardly of the carcass, and a tread is positioned radially outwardly of the reinforcement structure. The carcass is made of aramid cord fabric and the bead cores are made of aramid cords. The reinforcement structure is made of synthetic fiber-reinforced rubber or of aramid cords. The bead profiling members are made of rubber reinforced with synthetic fibers.

Abstract: A lining and method for in situ rehabilitation of a pipe. The lining includes a tubular shaped resin impregnated composite having a conductive layer surrounding an inflatable bladder. The method includes the steps of positioning the lining within a pipe section, inflating the bladder until the lining is in contiguous contact with the interior of the pipe and inducing an electric current through the conductive layer to resistively heat the lining and cure the impregnated resin.

Abstract: A method for repairing and reinforcing pressure-supporting hollow bodies, in particular deteriorated underwater pipelines, using a tape formed from a plurality of layers.

Abstract: A two ply laminated structural material is made from used vehicle tires, such as steel belted radial automobile tires. Each ply consists of a plurality of individual tread bearing tire belts joined end to end. The individual belts are made from tires by removing the tire sidewalls and transversely cutting the annular remainder. The individual belts are joined so as to provide a continuous structural belt capable of carrying a load in tension. By bonding two such belts together thread to thread using adhesive or vulcanization, a structural material is obtained having sufficient stiffness and strength to be used in the manufacture of a variety of rubber products.

Abstract: A composite belt of used vehicle tires having their sidewalls removed is obtained by joining individual belts in end to end relation by forming tapered belt ends which are overlapped and chemically bonded together. The overlapping of belt ends is accomplished so as to provide a high degree of strength to the joint enabling the composite belt to be used as a substrate for the further manufacture of rubber products.

Abstract: A pre-vulcanized tread for installation on a tire casing includes a sole and an upper tread portion which are each arched between respective skirts. The arc of the sole differs from the arc of the upper tread portion by a predetermined constant. In the preferred embodiment, the skirts include generally planar interior and exterior wall portions, the skirts joining the sole along a radius which is less than the radius of the sole itself. The exterior sidewall is disposed at a predetermined angle with respect to the vertical such that the width of a nominal arc of the sole radius intersecting the exterior walls is of a predetermined length which is greater than the width of the upper tread portion arc, and the interior walls of the respective skirts are disposed at a different angle with respect to vertical such that an extension of the interior wall intersecting the nominal arc of the sole defines another arc width which is less than the width of the upper tread portion arc.

Abstract: Disclosed is a process for repairing removed or damaged parts of plastic coating on metal tubing characterized in that the coating material or the adhesive for patches or bands is an adhesive polymer composition comprising by weight:A) from 59% to 94% of polypropylene, propylene/ethylene random copolymer, propylene/ethylene/1-butene random copolymer or mixtures thereof with one or more plastomeric polymers selected from the group consisting of ethylene/vinyl acetate copolymers, LDPE, HDPE, polyamides and polyurethane;B) from 5% to 40% of a polymer or a mixture of elastomeric polymers selected from the group consisting of EPR, EPDM, SEBS block copolymers, SBS block copolymers and ethylene/ethyl acrylate copolymers;C) from 1% to 10% of polypropylene modified with from 1 to 10% of maleic anhydride, isophorone bismaleamic acid or acrylic acid; andD) from 0% to 3% of carbon black.

Abstract: A method for recovering metal reinforcement from rubber tires involves placing a tire having metal reinforcement into a high-frequency electromagnetic field, heating the tire and separating the reinforcement from rubber. Lowering of power requirements and enlargement of capabilities are achieved by clamping the tire between rolls and subsequent heating of a local portion of the tire to a temperature of pyrolysis of rubber layers nearest to the reinforcement to form a pyrolysis swelling. The tire is then drawn between the rolls.

Abstract: A hand-held apparatus for vulcanizing the damaged bead zone of a pneumatic tire. The apparatus includes tongs to engage the bead to be repaired and a hold-up element to engage the diametrically opposite point on the bead. At least one transport and manipulation handle is provided for carrying the apparatus and at least one actuator is included to activate the tongs and the hold-up element.

Abstract: A general purpose construction element such as a post, pole, or beam is constructed from discarded used tire casings. Tire casings are first cut open and laid flat to form a mat. Then they are spirally wound in the fashion of a jelly roll so as to form a laminated composite post. The properties of the rolled post can be adjusted by adjusting the properties of the adhesive which is applied to one surface of the mat prior to rolling. The laminated rubber posts may rolled to predetermined sizes by appropriately preconfiguring the mat by juxtaposing or superposing multiple single tire mats. The laminated rubber posts have excellent strength, impact and vibration absorption, and machinability. The recycling of such non-degradable waste material as well as the provision of a superior replacement for natural wood is a double edged boon to the ecology.

Abstract: This invention relates to a method of using sidewalls from discarded automobile, truck, and other tires to manufacture drainage culverts. It also relates to the culverts manufactured by this process, and to assembly devices useful for assembling and holding together such culverts. These culverts are made by means of a simple cutting operation which removes both sidewalls from a discarded tire. The tread portion is made available for any other desired use, and is not further involved herein. The two sidewall portions are laid flat together and drilled with holes which allows them to be mounted on parallel bars which have been welded to a circular steel base plate having roughly the same dimensions as the sidewalls. When a suitable number of sidewalls (such as about 50 to 150) have been mounted on the bars, a steel closure plate having matching holes is slid onto the bars, pressed hard against the sidewalls using a press, and welded to the protruding bars.

Abstract: A method for improving the aging resistance of the sidewalls of retreaded tires is provided. The method involves the steps of treating the surface of the sidewalls of the worn tire to be retreaded with an aqueous solution or dispersion containing a film-forming polymer and an antiozonant, retreading the treated tire and then curing the treated retreaded tire thereby causing the antioxidant to migrate into the inner portion of the sidewall.The method of the invention is particularly useful for improving the aging resistance of the sidewalls of worn truck and bus tires which are conventionally retreaded several times.

Abstract: A method for molding articles, particularly tires, of different diameters/circumferences including a plurality of pitches defining a mold cavity, the pitches having transverse faces in generally face-to-face abutment in a closed position of the mold cavity, and at least several of the pitches being of different lengthwise sizes. The pitches in the closed position of the mold cavity defining a predetermined mold configuration which includes portions at angles to the length of the article molded in the mold cavity. The mold configuration matches lengthwise across all of the transverse faces irrespective of the location of the pitches relative to each other and irrespective of the number of the pitches. The latter arrangement permits articles, such as new or retread tires, of different lengths but of the generally same predetermined mold configuration to be molded in a single mold.

Abstract: A process of bonding two bodies of rubber by vulcanization of a connecting layer of vulcanizable rubber provides essentially a new manner of organizing the drainage of gaseous inclusions imprisoned between the bodies and/or resulting from the subsequent vulcanization reaction and of collecting these gases; the gaseous inclusions travel towards at least one conduit which passes through at least one of the two bodies, or else towards dead-end holes provided in one of the faces intended to be bonded.

Abstract: A tire unit consisting of a coreless air tire (4), containing a reinforcing ply (7), and a rim (3), the edges (8, 10) of which are permanently connected to one another solely by bonding. The part of the tire edge (8) containing the reinforcing ply is bonded to the latter only on one side of the rim. The rim edge (10) has an undercut (28) in which the tire edge (8) contains an annular reinforcement (29). A main bonding zone (23, 37) is provided in the undercut or adjacent to it on the outside. In the main bonding zone, the tangential angle (25) to the axis (1) is at no point (24) smaller than at each point which lies closer to the tire side wall (6) or smaller than the angle (20) at which the tire side wall (6) runs clear of the rim under all normal loading conditions. Moreover, a process is proposed for producing such a tire unit.

Abstract: Disclosed is a method of preparing an amorphous metal core 1 for use in a transformer. The uncut legs 7, 8 and 9 of the core 1 are covered with an adhesive impregnated substrate 10, the edges 11 of which are bent over to make contact with the core 1. A release sheet 12 and a plate 13 are placed over the adhesive impregnated substrate, the plate 13 is pressed against the core 1, and the adhesive is cured. The process is repeated with the edges on the opposite side of the core.

Abstract: A method and apparatus for installing sidewall replacement members on a used tire carcass by attaching sidewall members to the pre-buffed and cement coated sidewalls of the tire carcass, covering each sidewall member with a flexible sidewall mold, placing a flexible curing envelope around said tire carcass including the sidewall molds and sealing the envelope in the bead area of the tire carcass. The envelope covered tire carcass is then placed in a curing chamber at a preselected temperature and pressures for time period sufficient to cure said sidewall members and bond them on said tire carcass. The sidewall members can be installed in conjunction with the installation of tread rubber on the tire.

Abstract: A tire retreading tube for use with a tire retreading rim formed from a pair of axially-adjacent rim sections, one of said sections having a cutout for the reception of the valve stem extending from the tube body and being formed with threads adjacent the tube. The tube has an extension of generally cylindrical form through which the stem extends, so that the extension surrounds the portion of the stem adjacent the tube, and functions as a spacer element and is effective to limit movement of the stem and the tube relatively to the rim section. Suitably, the spacer element threadedly engages the stem adjacent the tube, has a body which essentially fills the cutout circumferentially, and has end flanges to overlie the adjacent faces of the rim section with which it is to be associated.

Abstract: A repaired elastomer article having a cut or crack entirely therethrough. A treating agent is located about the cut portion on the inner surface of the article and an amine curable polymer or prepolymer layer resides over said treating agent. A cured elastomeric patch resides over said curable polymer. Since the amine curable polymer cures at ambient temperatures, the repair of the elastomer article can occur on site. The invention is especially useful in the repair of tires.

Abstract: An elastomer article capable of being pressurized has a hollow extending therethrough. An elastomer free grid, generally in the form of a woven fabric, is located on the interior of the article in the vicinity of the hollow and prevents the same from being removed therefrom. An elastomer patch is utilized therewith.

Abstract: A vehicle tire with traction-improving devices, wherein the basic tire has a plurality of uniformly spaced apart cross grooves running essentially from sidewall to sidewall. Each groove is fitted with an inflatable bag or bladder which, when uninflated, retracts within the circle of the road-engaging surface of the tread. An annular manifold is affixed to at least one sidewall and is connected by conduits to the cross members. This manifold has a valved air inlet which may be used to pressurize the cross members via the manifold and thus to project the inflated members radially beyond the circle of the tread so that they engage the road surface. Depressurizing the manifold of course causes the members to retract. Each cross member is equipped with some form of traction-improving substance, structure or the like to enhance road grippability, especially in slippery road conditions.

Abstract: This invention relates to a method for applying a tread to a tire, whereby around a toroidal tire a layer of non-vulcanized rubber is applied, which will form the tread area of the tire after vulcanization in the vulcanization press; and whereby the thus prepared tire is vulcanized in vulcanization press. According to the invention, before the vulcanization of the thus prepared tire in a vulcanization press, portions of the layer of non-vulcanized rubber are removed by peeling or by forming peels of non-vulcanized rubber, so that the shape of the peeled tire is adapted to the shape of the vulcanization press. The invention also relates to a machine for carrying out the method according to the invention.

Abstract: A process and composition for applying and bonding an amine curable polymer or prepolymer at ambient temperatures to the surface of a cured elastomer substrate. The elastomer article or substrate is treated with an organic oxidant such as an N-halohydantoin, N-haloamide, or an N-haloimide, for example, the various isomers of mono- , di- , and trichloroisocyanuric acid. A polyisocyanate is applied thereto. A composition of the amine curable polymer or prepolymer is prepared with an amine curing agent. To the curing agent and curable polymer or prepolymer composition is added a polar solvent which is mixed with the resulting blend or mixture and added to the treated elastomer surface; said polymer or prepolymer cures at ambient temperature and becomes bonded to said elastomer. The application is relatively easy, since the entire mixture is a liquid and can be applied in situ.

Abstract: In repairing articles of natural rubber or elastomer predominantly of natural rubber with cured polymer or prepolymer (polyurethane/polyurea), adhering advantages are obtained especially at elevated temperatures when the damaged area is treated with halogen-containing oxidant dissolved in 1,2-dichloroethane instead of other solvents.

Abstract: Material for repairing punctures in tubeless tires from the outside is provided employing a multiplicity of substantially contiguous, lightly twisted fibrous cords which are heavily coated and at least partially impregnated with a highly plasticized and essentially weak, vulcanized elastomeric adhesive, the cords lying abreast and between a pair of release sheets, whereby the cords are encased in adhesive and can be peeled off the release sheets and separated as needed to repair various sized punctures.