Abstract: A process of molding a racket frame having an evacuation stage for shrinking a lamination of an inner bladder, a tubular prepreg and an outer protective tube before closing a mold, and the reinforcing fibers of the prepreg are not cut by inner edges of the mold, thereby preventing the racket frame from burr due to the reinforcing fibers cut by the inner edges.

Abstract: A dual containment pipe system suitable for installation into an existing conduit includes an impervious containment pipe adapted to be installed as a primary containment pipe and a crush-resistant and flexible spacer element disposed about the entire external circumference of the primary containment pipe. The spacer is formed of a plurality of spaced apart and parallel substantially crush-resistant longitudinal members with a plurality of spaced apart parallel flexible connecting ribs bonded thereto. The longitudinal members form a uniform space when the containment pipe suitable for installation of leak detection systems including cables or based on measuring pressure differentials. The new impervious primary containment pipe may be cured in place, folded and formed, diameter reduced pipe, or any other pipe suitable for pipeline rehabilitation.

Abstract: A flow-through device for use during the installation of an inverted resin impregnated flexible tubular liner in a passageway permitting the flow of fluids through the liner during the curing portion of the installation process is provided. A cylindrical body has an expandable bladder interior sealingly attached to the interior of the tubular body to form a pressure chamber is attached to the trailing end of the liner. Pressurized fluid is supplied to the chamber to inflate the bladder to close the end of the liner. The bladder allows flow through the passageway during curing of the liner, when the effluent pressure exceeds the pressure in the bladder.

Abstract: A translaminar reinforcement system for Z-direction reinforcement of a fiber matrix structure in which a plurality of reinforcing elements are disposed in a body of compactible material to extend in at least one direction and orientated at at least one acute angle and driven into a fiber matrix structure when the body is compacted by a compressive force.

Abstract: A repair system for repairing faults in a conduit. A protective skirt protects the leading edge of a repair sleeve on an inflatable mandrel. One or more straps hold the repair sleeve in position as the mandrel is inserted into the conduit. A release liner facilitates the removal of the mandrel from the repair sleeve after the resin in the repair sleeve has been cured. A calibrated hose within the mandrel provides a substantially constant temperature along the length of the mandrel.

Abstract: A method and composition for providing gas-impermeable, adherent, flexible, and fire retardant coatings to rock and the like surfaces whereby the rock is supported by the caisson effect and mechanical strength properties of the coatings. The method comprises spraying a two-component polymer such as polyurethane onto a rock surface and spraying a layer of inorganic particulate material such as unexfoliated vermiculite onto the said coating of polymer with or without concurrent application of further layers of said polymer before completion of curing of the coating whereby the particulate material adheres to the polymer. An aqueous dispersion of inorganic particulate material such as vermiculite which may be in the exfoliated form can be applied onto the coating.

Abstract: Provided is a blow-molded article which can be readily formed with good Gloss and with substantially no surface unevenness, even without application of surface coating, and which can be used as a finished product without further treatment. The blow-molded article has a base layer and a surface layer. The base layer is formed from a thermoplastic resin material having a melt index (MI) of about 0.05-2.0 and a flexural modulus of 1,470 MPa (15,000 kgf/cm.sup.2) or more. The surface layer is formed from a colored or transparent thermoplastic resin material having an MI of about 1-30 provided that it is higher than that of the base layer, and excellent weather resistance. The thermoplastic resins used to form the base and surface layers should be resins of the same family.

Abstract: A rehabilitation system has been developed for cleaning, testing and slip lining pipe particularly sewer lines while in service. The system includes the use of equipment adapted for use on mobile vehicles to increase efficiency and mobility of the system. The cleaning system utilizes a specialized cleaning bucket that can be pulled from excavations and existing manholes. The testing and lining systems also utilize specialized test mandrels and pulling mandrels for the pipe liner that can be used with equipment operating, in part, from existing manholes.

Abstract: An assembly which can be inserted into a pipeline or passageway on which a curable resin impregnated flexible lining is placed about an inflatable bladder is provided. The bladder is mounted to one end of a core pipe and folded over on itself. Medium flowing in the pipeliner passageway can pass through the core pipe during a lining operation. The core pipe is of sufficiently rigid nature to withstand inflation pressure to move the lining tube into the pipeliner passageway surface by inflation of the bladder, but yet is sufficiently flexible and bendable so as to bend enabling it follow curbs and falls in the pipeliner passageway into which it is inserted. Temporary holding means restrain the liner during insertion.

Abstract: A bent pipe lining method which can get rid of bulky creases of the liner commonly formed at the bends of the pipe, and the method is characterized by a use of a flat belt that is hitched to the sewn-end of the liner bag, which pulls the flat belt inside itself as it is everted into the bent pipe; when the liner bag is hardened the flat belt is kept stretched so as to keep the bulky creases compressed and bent flatly.

Abstract: A method for manufacturing a liner bag used for lining used underground pipes: (i) a long tube of a rectangular resin absorbent sheet, whose outer face is hermetically coated with a plastic film, is formed with a long cavity along the entire length of its seam by attaching a first reinforcer cover strip to the inner face of the resin absorbent sheet tube across the seam by welding only the lateral long side portions thereof; (ii) a second reinforcer strip is fixed in the long cavity by welding it to the resin absorbent sheet and the first reinforcer strip in a manner such that the second reinforcer strip is trapped between the resin absorbent sheet and the first reinforcer strip at a location underneath the seam; (iii) then, a first adhesive tape is applied to the surface of the plastic film in a manner so as to cover up the entire length of the seam and a wider second adhesive tape is applied to the surface of the plastic film over the first adhesive tape, the back of the first adhesive tape having a releasi

Abstract: An improved method of rehabilitating a conduit which is in a damaged or deteriorated state. A lining hose, having a resin absorbing inner layer which is soaked with an excess volume of resin, is expanded and shaped to conformingly line a conduit by inverting a calibration hose under fluid pressure inside the lining hose. The calibration hose is comprised of a resin-absorbent layer and an impermeable layer that outwardly adjoins and surrounds the resin-absorbent layer. After inversion, the resin absorbent layer of the calibration hose contacts and adheres to the resin impregnated inner layer of the lining hose and is impregnated in situ with a portion of the excess volume of resin from the lining hose. Upon curing, the calibration hose becomes an integral part of the liner.

Abstract: The present invention provides a repairing tube to be used in pipe lines such as gas conduits, water supply lines and sewer lines, chiefly those buried in the ground, for the purpose of repairing the pipe lines. More particularly, the present invention relates to a repairing tube including a rigid pipe formed of thermoplastic resin and a tubular woven fabric and a method for repairing or reinforcing a pipe line with the repairing tube. Furthermore, the present invention relates to a method for removing the repairing tube in its collapsed form out of the pipe line, for example when the repairing tube installed in the pipe line has become superannuated or it has been collapsed for some reason or other to impair the function of the pipe line and hence it is desired to reline the pipe line.

Abstract: A method of lining passageways, or pipelines, employs a pre-liner sleeve formed of a thin plastic material, which is applied to the inside surface of the passageway to be lined. During application of the pre-liner sleeve, it is held in a concertina-like folded condition in a magazine which is moved along the passageway by operation of air pressure which is applied from within the pre-liner sleeve, and which simultaneously inflates the pre-liner sleeve so that it communicates with the inside surface of the passageway. A spray head follows the magazine from within the inflated pre-liner sleeve and applies a hardenable composition, such as mortar, to the inside of the inflated pre-liner sleeve. The spray head is followed, in some embodiments, by a tube which is everted to communicate with the applied hardenable composition under air pressure. The tube holds the applied layer in position while it cures.

Abstract: A method of lining a pipe conduit to provide superior corrosion resistance. A flexible lining hose, having a resin absorbent layer which has been introduced with a volume of high strength resin, is first positioned inside of the conduit. The lining hose is then expanded into contact with the inner diameter of the conduit by inverting a calibration hose. The calibration hose has an impermeable membrane and a layer of resin absorbent material that has been introduced with a volume of corrosion resistant resin. The calibration hose is inverted by use of fluid pressure inside the lining hose, the fluid pressure being exerted against the impermeable membrane of the calibration hose. The resin layers are then cured by the application of a heated fluid until the lining hose and the calibration hose form a unitary rigid self supporting liner.

Abstract: A method of affixing a material on a substrate to the inner surface of a bore tube of magnets for a superconducting supercollider includes the steps of bonding a gas-absorbing material to a thin metallic substrate and forming the substrate and the material into a partly tubular configuration having an inner surface and an outer surface, the material being on the inner surface. The partly tubular configuration is shaped in a manner whereby the partly tubular configuration is expandable in diameter. The partly tubular configuration is inserted coaxially into the tube with the outer surface of the partly tubular configuration in proximity with the inner surface of the tube. Hoop compressor stress is applied to the inner surface of the partly tubular configuration, thereby forcing the partly tubular configuration against the inner surface of the tube. The bore tube is maintained at cryogenic temperature.

Abstract: A generally U-shaped lateral liner having a radially outwardly directed flange at its proximal end is drawn through a main pipe into a lateral pipe to be lined. A generally U-shaped main pipe liner is drawn through the main pipe to be lined, with a side wall portion overlying the radial flange of the lateral liner. Steam is supplied to reform the main liner into a generally cylindrical configuration into conformance with the interior walls of the main pipe. A pair of packers are disposed in the lined main pipe on opposite sides of the lateral pipe and a ball-like member with surface grooves is provided between the packers. Upon application of steam to the region between the packers, the steam raptures the side wall portion of the main liner, causing the ball to seat in the opening. Steam flow along the grooves at high velocity causes heat transfer to the abutting main and lateral liners to fuse the liners one to the other. Steam supplied through the grooves also reforms the lateral liner.

Abstract: A repair system for repairing faults in a conduit. A protective skirt protects the leading edge of a repair sleeve on an inflatable mandrel. One or more straps hold the repair sleeve in position as the mandrel is inserted into the conduit. A release liner facilitates the removal of the mandrel from the repair sleeve after the resin in the repair sleeve has been cured. A calibrated hose within the mandrel provides a substantially constant temperature along the length of the mandrel.

Abstract: A liner for a lateral pipe which leads into a main pipe having at one end a collar for installation at the location where the lateral liner meets the main, the collar extending along the interior of the main seating against the opening of the lateral. The liner mounted in a launching device is installed by everting the liner through an opening in the collar by means of fluid under pressure supplied through a pressure pipe in the launching device, the launcher held in position by an inflatable bladder which is inflated by said fluid, and against the collar for sealing the lateral/main pipe junction.

Abstract: A method and lining for rehabilitating a pipe or conduit. The method comprising providing a heat curable resin impregnated lining with first and second conductive strips extending lengthwise through the lining from a first end to a second end and separated circumferentially by non-conductive material. Connecting the conductive strips together at said second end and causing a current to flow through said first conductive layer from said first end to said second end of said lining, and through said second conductive lining from said second end to said first end. The lining having a plurality of conductive strips extending lengthwise through the lining.

Abstract: Underground pipelines that carry wastewater, water, natural gas, and industrial fluids deteriorate with age. This invention is a process and apparatus for installing a thermoplastic liner in a dry pipeline to accomplish in situ rehabilitation. It involves extruding a tube of thermoplastic liner material within the interior of a dried and preheated pipeline in situ, said tube having an outside diameter smaller than the inside diameter of said pipeline. The tube is next expanded so that the outside diameter of said tube is substantially equal to the inside diameter of said pipeline. The expanded tube is then cooled and hardened in a liner configuration.

Abstract: A compact apparatus for everting a liner utilizing fluid pressure after the liner has been aligned with the conduit to be lined is provided. The apparatus includes a sphincter valve with its axis aligned with the conduit to be lined and an eversion pressure chamber overlapping a portion of the sphincter valve for reducing the length of the apparatus and allowing positioning in a sewer manhole. A downtube is positioned at the input side of the sphincter valve which can extend to the top of the manhole. To install a liner, the apparatus is placed in the entrance manhole with the sphincter valve aligned with the axis of the sewer pipe, the liner is inserted into the downtube, turned to align with the sphincter valve and conduit and fluid pressure is applied to the valve to engage the flattened liner which after passing through the valve is everted by fluid pressure as it enters the sewer pipe.

Abstract: A method for manufacturing a double jacketed fire hose, and a double jacketed fire hose comprising an inner jacket and an outer jacket, said inner jacket being encapsulated with polyurethane, said inner jacket residing within said outer jacket, said inner and outer jacket having a controlled net twist.

Abstract: A method is proposed for lining a branch pipe from the main pipe; in particular a special sealing mechanism is adopted in attaching the collar of a liner bag onto the flange of a fluid pressure sealing nozzle: stopper tacks are embedded in the collar at appropriate locations, each of the stopper tacks having its bottom end exposed from the back face of the collar and connected with a string; the back face of the collar of the branch pipe liner bag is faced with the upper face of the flange of the fluid pressure sealing nozzle, which comprises a hollow cylindrical part, the flange extending perpendicularly from the side of the cylindrical part, at least one endless sealant laid on the upper face of the flange, and a string puller provided in the flange; the strings are engaged with the string puller; the string puller pulls the strings so that the collar and the flange are moved toward each other until sufficient sealing effect is obtained.

Abstract: A resin injection method and a pipeline repair method are provided for smoothly and rapidly performing setting of an open liner and for completing works such as eversion and insertion of the open liner even for a steeply inclined pipeline. An end portion of an open liner is everted such that the end is attached to one end of a pipe liner bag which has been introduced into a pipeline to be repaired. A resin is injected into the open liner from the other end thereof while the pipe liner bag is evacuated, thus injecting the resin into the pipe liner bag through the open liner. After the resin has been injected into the pipe liner bag 1 in the above-mentioned method, the open liner is everted by fluid pressure to be inserted into the pipe liner bag, whereby the resin is impregnated into the pipe liner bag. Then, the pipe liner bag is pressed against the inner wall of the pipeline 4, in which state the resin impregnated in the pipe liner bag is cured to repair the pipeline.

Abstract: A dual containment pipe system suitable for installation into an existing conduit includes an impervious containment pipe adapted to be installed as a primary containment pipe and a crush-resistant and flexible spacer element disposed about the entire external circumference of the primary containment pipe. The spacer is formed of a plurality of spaced apart and parallel substantially crush-resistant longitudinal members with a plurality of spaced apart parallel flexible connecting ribs bonded thereto. The longitudinal members form a uniform space when the containment pipe suitable for installation of leak detection systems including cables or based on measuring pressure differentials. The new impervious primary containment pipe may be cured in place, folded and formed, diameter reduced pipe, or any other pipe suitable for pipeline rehabilitation.

Abstract: A method for repairing flow conduits, such as pipe lines, wherein the inner surface of a conduit is provided with a flexible material, including a curing agent as well as a reinforcement layer, and the curing agent is hardened, the reinforcement layer comprising a knitted fabric, wherein the knitted fabric comprises reinforcement filaments which are separate from a fabric-forming yarn and extend inside the knitted fabric substantially in a single direction.

Abstract: An eversion nozzle used in the operation of repairing an underground tubular conduit by lining the inner wall of the tubular conduit with an everted tubular liner bag impregnated with a hardenable liquid resin: the inventive eversion nozzle is a hollow straight cylinder and its length L and inner diameter D hold:D/5<L<2D;a novel eversion method is also provided wherein the above eversion nozzle is utilized.

Abstract: A lining process for a pipeline or passageway employs a resin impregnated lining tube which is everted into a collapsed preliner tube in the passageway to be lined. A constraining element allows the preliner tube to expand only in the vicinity of the everting face so that a pool of resin is formed between the everting face and the preliner tuber adjacent to the constraining element. In this manner, air is prevented from communicating with the everting face.

Abstract: A method of affixing a material on a substrate to the inner surface of a bore tube of magnets for a superconducting supercollider includes the steps of bonding a gas-absorbing material to a thin metallic substrate and forming the substrate and the material into a partly tubular configuration having an inner surface and an outer surface, the material being on the inner surface. The partly tubular configuration is shaped in a manner whereby the partly tubular configuration is expandable in diameter. The partly tubular configuration is inserted coaxially into the tube with the outer surface of the partly tubular configuration in proximity with the inner surface of the tube. Hoop compressor stress is applied to the inner surface of the partly tubular configuration, thereby forcing the partly tubular configuration against the inner surface of the tube. The bore tube is maintained at cryogenic temperature.

Abstract: An inflation apparatus is described for a labeling machine for placing labels on containers. A sealing element seals the opening of a container whereby the sealing element covers the opening without substantial insertion of the sealing element into the opening in the container. A wall in the sealing element defines an opening through the sealing element for passing an inflation gas through the sealing element and into the container. A gas supply and conduit are provided for connecting the gas supply to the opening in the sealing element. The invention is particularly suited to in-line labeling machines.

Abstract: A lining material for pipe lines, especially those buried in the ground such as sewage pipe lines, and a process for providing such pipe lines therewith, includes a flexible tubular film, a resin-impregnated sheet covering the outer surface of the flexible tubular film, and a tubular covering material having a strong resistance to tensile force. The sheet may be constructed by several units of sheet fractions which are overlapped in both lateral end portions so as to be slidable over each other in opposite directions to form a tubular sheet. The lining material is applicable for repair and/or reinforcement to the inner surface of a pipe line having damaged portions. According to the process for providing pipe lines with this lining material, thermocuring of the lining material applied onto the inner surface of a pipe line can be carried out by moving a nozzle for jetting pressurized steam from one end to the other end of the pipe line without applying high pressure to the pipe line.

Abstract: A liner for lining the interior of subterranean pipes, such as sewers is formed from a seamless, knitted fabric sleeve having a pile construction in which piles extend away from a ground portion of the sleeve, open areas being formed among the ground and piles. A synthetic resin is applied to the fabric sleeve so as to thoroughly impregnate the sleeve. The resin-coated sleeve may be installed in an underground pipe by everting same under fluid pressure. The sleeve has expansion capabilities which permits the resin-impregnated sleeve to be in contact with the interior surface of the pipe for the entire length of the sleeve.

Abstract: A method and apparatus for lining a branch pipe is provided which can directly achieve an air-tight connection between a pressure bag and a branch pipe liner bag in a simple structure without employing a conventionally required sealed tube. An open end of the pressure bag is attached to a set nozzle made of a magnetic material coupled to a work robot which is movably installed in a main pipe. A branch pipe liner bag, impregnated with a thermosetting resin, is placed inside the pressure bag. The liner bag has a flange which includes a magnetic plate so as to be magnetically connected to the set nozzle by a magnetic force of a magnet provided for the work robot. With the flange being closely contacted to the inner wall of the main pipe around a branch pipe opening, compressed air is supplied into the pressure bag to evert and insert the branch pipe liner bag into a branch pipe.

Abstract: A method for repairing a tubular conduit by lining the inner wall of the tubular conduit with a tubular liner bag impregnated with thermosetting liquid resin, having the steps of: (a) everting the tubular liner bag in the tubular conduit; (b) closing the open end of the tubular liner bag with a stationary lid thereby forming a closed space inside the tubular liner bag and the lid; (c) inserting a heat-resistive hose into the closed space through the lid; (d) inflating the tubular liner bag by charging a pressurized fluid into the closed space; and (e) supplying hot water via the heat-resistive hose to thereby heat and harden the liner bag; wherein the heat-resistive hose is slidably inserted through the lid, and is connected to the lid via a flexible inflatable sealing device such that when the pressurized fluid is charged into the closed space the sealing device is pressed to inflate externally from the lid thereby forcing the heat-resistive hose to slide externally.

Abstract: An apparatus and method for inflating and curing a resin impregnated liner include a resin impregnated liner lowered into an underground structure so that a portion of the liner extends beyond the structure. The protruding portion of the liner is then sealed. Pressurized air and steam are simultaneously admitted into the liner so that the liner inflates and engages the structure. Air and steam continue to be admitted into the liner for a period sufficient to cure the resin while maintaining the liner engaged with the structure.

Abstract: The invention relates to a material wherein the main constituent is PVC for manufacturing pipes to be used for relining underground pipelines by the pipe in a folded condition being drawn into the pipeline and being engaged with the inside surface of the pipeline by temperature increase. By the addition of polymer thermoplastic elastomers which can be mixed with PVC the material has a glass transition temperature ranging from 45.degree. to 75.degree. C. and a ratio (Emod, T=20.degree. C.)/(Emod, T=75.degree. C.)>20. The invention also relates to a method for restoring underground pipes by relining such pipes with a pipe which has been folded after the extrusion.

Abstract: A branch pipe lining method of the invention utilizes a branch pipe liner bag impregnated with a hardenable resin and having a flange at one end thereof, wherein the flange is folded out and mounted to a fluid pressure sealing nozzle; the branch pipe liner bag is everted and insertied into a branch pipe; an upper end of the branch pipe liner bag is pulled up by a rope or the like with the flange thereof being secured on the inner wall of the main pipe; the fluid pressure sealing nozzle is removed from the branch pipe liner bag; a sealing pressure bag introduced into the main pipe is expanded to seal a lower opening of the branch pipe liner bag with the sealing pressure bag; the upper end of the branch pipe liner bag is closed, and the branch pipe liner bag is pressed against the inner wall of the branch pipe with a fluid pressure; and the hardenable resin impregnated in the branch pipe liner bag is hardened while the branch pipe liner bag is continuously being pressed against the inner wall of the branch pipe

Abstract: A method for scaling a flexible inner bag inside a squeezebottle so that the flexible inner bag will invert in order to dispense viscous fluids. The method is particularly useful in single-piece squeezebottles which have a small ratio of discharge opening cross-section to body cross-section. In practicing the present invention, a flexible inner bag has heat-activated adhesive stripes applied to the upper half of its exterior. The flexible inner bag is inserted into a squeezebottle through the discharge opening and then expanded inside the squeezebottle by compressed air. After the flexible inner bag is fully expanded, and with pressure applied to the inside of the flexible inner bag, heat is applied either to the inside of the bag or to the outside of the squeezebottle by hot air, steam, radiation, or induction heating of metal particles in the adhesive. The adhesive is heat-activated and the upper half of the flexible inner bag is thereby attached to the inner side wall of the squeezebottle.

Abstract: An electrically remote-controlled intra-pipe work vehicle is hydraulically actuated and is adapted to work with a lining equipment for lining interior of a branch pipe interconnecting with the main pipe in which the vehicle is positioned. The vehicle has a self-clamping mechanism to securely anchor itself at a work site in the main pipe and a tool actuating mechanism for angularly positioning and actuating the lining equipment. The lining equipment includes a lining material anchoring hydraulic press for pressingly hold an end flange of a tubular lining material, which is made of a fabric impregnated with a thermosetting synthetic resin, by an arcuate pressing plate. A counter hydraulic press counteracts the pressing force of the lining material anchoring press. A sealing tube having an electric heater element imbedded therein is sealedly bonded to an end of the tubular lining material with a bonding agent having a low melting temperature.

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 branch pipe lining method ensures a reliable air-tight connection between a branch pipe liner bag and a fluid pressure sealing nozzle with a simple structure so that the branch pipe liner bag can be inserted into a branch pipe without fail. A branch pipe liner bag impregnated with a hardenable resin and having a flange at one end thereof is used for the branch pipe repair. The flange of the branch pipe liner bag is folded out to be mounted to a fluid pressure sealing nozzle. A close contact between the flange and the fluid pressure sealing nozzle is held by vacuum pressure. The branch pipe liner bag is then everted and inserted from a main pipe into a branch pipe toward the ground by a fluid pressure. The branch pipe liner bag is pressed onto the inner wall of the branch pipe by a fluid pressure, and the hardenable resin impregnated in the branch pipe liner bag is hardened while the bag itself is kept pressed onto the inner wall of the branch pipe.

Abstract: A tunnel barrier system for lining the interior surface of a tunnel cavity includes a first panel in facing engagement with and affixed to a first impermeable membrane. A second panel is in facing engagement with and is affixed to a second impermeable membrane. The second panel is positioned adjacent to but spaced apart from the first panel to form a cavity between the panels. A filling material is positioned within the cavity. A third impermeable membrane is in facing engagement with both the first and second impermeable membranes and extends across the cavity such that the first panel, the second panel and the cavity are rendered airtight and watertight.

Abstract: A process for forming, handling, affixing, and inverting a thin plastic half bag to a continuous inner side wall of an outer plastic container. A non-metallic mandrel is used as a tool for thermoforming a half bag over the top of the mandrel. The top of the mandrel with bag attached is inserted into an open end of the outer plastic container. A continuous stripe of heat-activated adhesive containing metal particles is bonded to the exterior of the half bag at the open end of the half bag. When the half bag is inserted, the stripe of adhesive is positioned near the midpoint of the container. A magnetic induction field generated near the container midpoint heats the metal particles in the heat-activated adhesive, thereby activating the adhesive. When the adhesive has been heated, compressed air is blown from the mandrel to press the bag and adhesive against the inner side wall of the outer container to cause bonding between them.

Abstract: An underground pipeline or passageway is lined by having a plastics film pre-liner tube applied thereto by inflation, and the tube whilst inflated has an applicator pulled therethrough from which a fluent curable or hardenable composition issues and is applied directly to the inside of the inflated tube to form a layer which cures or hardens to form a lining. Preferably a second tube is applied to the inside of the composition layer to hold it in position whilst it cures or hardens.

Abstract: A method for lining a passageway which includes providing a plurality of tube sections connected end to end, pulling a first tube section through the passageway in a collapsed condition and thereafter everting a second tube section into the interior of said collapsed first tube section to cause it to expand outwardly toward the interior walls of said passageway.

Abstract: An improved method for impregnating a tubular lining material with a hardenable liquid resin employed in a pipe repair operation by lining the pipe internally with the lining material; the method comprises (a) supplying about the same amounts of the same hardenable liquid resin to two mixing baths, (b) mixing the hardenable liquid resin with an agent to retard hardening and another agent selected from catalyst to facilitate hardening and hardener in one of the mixing baths, and, at the same time, mixing the hardenable liquid resin with a hardening accelerator in another one of the mixing baths, (c) supplying predetermined amounts of these mixtures to a static mixer from the respective mixing baths, (d) mixing these mixtures together in the static mixer to obtain a final mixture of hardenable resin, (e) supplying the final mixture to the tubular lining material, and (f) impregnating the tubular lining material with the final mixture.

Abstract: A substantially rigid thermoplastic pipe for repairing a pipeline by installing the thermoplastic pipe in an existing underground pipeline, such as a service lateral, having access from only one end and a bend along its length is provided. The thermoplastic pipe may be manufactured in reduced form so as to have a memory for the reduced form, is heated to make it pliable for installation, and is pulled into the lateral from the access opening using a cable-and-pulley arrangement anchored temporarily at the intersection of lateral and main pipelines. When installed in a lateral, it is rounded and cooled in its rounded shape by passing steam under pressure through passages along the folds of the pipe while its leading end is restricted.

Abstract: An apparatus for applying thin film polymer labels onto small cylindrical articles has a label transport drum with a substantially smooth, outer surface on which labels are fed. A cold adhesive that is viscous at room temperature is printed onto an area adjacent the leading edge of the label. A solvent is applied by two static wiper assemblies onto an area adjacent the trailing edge of the label. The first static wiper assembly wipes an amount of solvent onto the area adjacent the trailing edge of the label for cleaning and softening that area. A second wiper assembly applies an amount of solvent onto the area adjacent the trailing edge of the label for dissolving a portion of the label to create a tacky, bonding quality to the label and form a solvent seal bond when the trailing edge overlaps the leading edge. Solvent is applied to the wiper bodies for dispersion throughout and to the wiper tip. A plunger is formed in the drum at those areas where the trailing edges of labels are positioned.