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: In renovating an existing underground pipe with a new metal pipe installed inside the underground pipe, the invention provides a method of repairing the existing underground pipe characterized by transporting a metal tubular material as wound up in the form of a roll to a repair site, the tubular material being deformed to a flat folded form so as to be diminished in effective outside diameter and to be restorable to a metal pipe of an outside diameter corresponding to the inside diameter of the underground pipe when inflated by application of pressure from inside, installing the roll of tubular material on the ground, subsequently inserting the tubular material into the underground pipe through an underground work pit while unwinding the tubular material from the roll, closing opposite ends of the inserted portion of the tubular material, and thereafter restoring the closed portion of the tubular material to a metal pipe of circular cross section by applying pressure thereto from inside with a pressure fluid

Abstract: An apparatus and method for sealing an underground junction between a lateral service line and a main pipeline from the inside-out. One embodiment provides a substantially rigid patching apparatus which may be positioned and installed with a robotic device within a main pipeline. The patching apparatus has a flange shaped to fit the internal diameter of the main pipeline and a tubular stem or sleeve which penetrates into the lateral service line. The patching apparatus contains an interconnection substrate such as felt, sponge or other similar material. The interconnection substrate may be impregnated with a bonding agent which sealingly interconnects the patching apparatus to the main pipeline and lateral service line. The seal provided by the inverted-tee patch effectively eliminates most water intrusion or the influx of plant roots and other matter which can seriously damage or obstruct the main pipeline.

Abstract: A method for installing a flange on the end of a tubular member lined with a thermoplastic liner is provided. The flange is formed with a groove having extrusion openings extending from the front to the rear surface of the flange, the groove for receiving the reformed end of the liner which is forced into the extrusion openings and extends above the front surface of the flange to provide a surface for securing with a corresponding flange.

Abstract: A decoration sheet is retained on the cavity periphery by a sheet clamp in such a state that it is projected into a molding cavity of a female die. Then the decoration sheet is heated and softened by a curved hot platen, and thereafter it is drawn through suction ports of the female die to bring the sheet into close fit to the inner periphery of the molding cavity. The deformation amount of the decoration sheet heated and softened is decreased in premolding the sheet into the molding cavity surface of the female die. Therefore, distortion of the decoration sheet, appearance of wrinkles, and breakage thereof become little. Next, the female die and the male die are coupled with each other to effect die clamping, and a molten resin is poured to fill the molding cavity to effect injection molding.

Abstract: A method for installing and curing a cured in place lateral seal at the connection between a main pipeline and a lateral connection is provided. The method includes placing a resin impregnated lateral seal in the form of a top hat with a brim portion and short tubular portion onto a cylindrical flexible bladder cartridge having a tubular recess for receiving the tubular portion of the seal with the brim portion along the outer portion of the bladder, placing an assembly carrying the bladder to the location of the lateral and pressing the brim portion of the seal against the interior of the main pipeline and everting the tubular portion out of the tubular recess into a portion of the lateral to form the seal. Radiant energy, preferably, light is then applied to the resin to initiate the cure, the bladder is cooled and then deflated.

Abstract: A pipe lining method provides for precise cutting of a main pipe liner bag along a branch pipe opening using a cutter while preventing the inner wall of a branch pipe and the cutter from damages. After a cutting protection member is attached along the periphery of a branch pipe opening of a main pipe, the main pipe is lined using a main pipe liner bag. Then, a cutter of a cutting robot introduced into the main pipe is driven to cut away a portion of the main pipe liner bag covering a branch pipe opening. Since the cutting protection member functions as a guide for the cutter when cutting the portion of the main pipe liner bag covering the branch pipe opening as well as functions as a protection member for protecting the inner wall of the branch pipe, thereby making it possible to precisely cut the main pipe liner bag along the branch pipe opening using the cutter and to prevent the inner wall of the branch pipe and the cutter from damages.

Abstract: Apparatus is provided for introducing sealant into a clearance between a replacement pipe and an existing pipe within which in use the replacement pipe is located. The apparatus includes a nose-cone having a tubular body for connection to the upstream end of the replacement pipe, a frangible member in the form of a pop-out plug; pierceable metal foil; plastic film or membrane to seal the bore of the tubular body and at least one non return valve in the form of an elastic ring, rubber O-ring or plug and spring assembly to permit the flow of sealant from the bore of the body into the clearance by way of the wall of the body but to resist return-flow from the clearance into the bore.

Abstract: A method as well as a respective apparatus for lining pipes and ducts are suggested, wherein a flexible tube is introduced in turning up manner into a pipe having respective openings at the pipe access end and the pipe terminal end. Here, prior to the turning up operation, a traction means is led through the flexible tube and the pipe and is secured to the flexible tube access end, wherein the flexible tube with the terminal end of the flexible tube is joined to the pipe access end and the traction means is automatically or distance-controlled pulled from the pipe access end by means of a motor winch. Here, the pipe by using turning up the flexible tube is lined therewith. The method is particularly suited for lining pipes and ducts having a plurality of pipe bends or angles.

Abstract: It is described a method for lining a pipe or a duct through an internal lining of a plastic coated flexible fabric tube adhering to the inner wall of the pipe by means of an adhesive. This method stands for the following steps:filling a metered amount of adhesive into said flexible fabric tube in a uniform distribution over the flexible tube length,introducing said flexible fabric tube into the pipe, wherein one end of said flexible tube is fastened to the rear pipe end with respect to the moving direction, and the flexible tube using turning up is introduced into said pipe, andgenerating an internal pressure inside said introduced flexible fabric tube by means of supplied water for pressing said flexible tube against the inner wall of said pipe until the adhesive between said flexible tube and the inner wall of said pipe is cured. Here, the water is heated and cooled in controlled manner depending on the temperature values measured inside and outside the pipe for accelerating the curing operation.

Abstract: A method and apparatus for fabricating a resin impregnable flexible liner for lining a lateral pipe which leads into a main pipe having at one end a flexible collar for installation at the location where the lateral liner meets the main is provided. The seal is formed using a pipe template with an opening conforming to the lateral to be sealed. A tubular portion of liner is inserted into the opening and a ring of flexible impregnable material is bonded to the tubular portion about the opening. An expandable plug holds the elements in position during bonding.

Abstract: A foil-decorating injection molding method including using a foil-decorating injection molding machine with an injection mold having a male mold and a female mold. The female mold has a cavity surface for forming a cavity, and a parting surface having an outer peripheral section on which to hold a decorative sheet, and an inner peripheral section extending between the inner edge of the outer peripheral section of the parting surface and the edge of the cavity surface in a concavely curved shape to allow the expansion of a peripheral portion of the decorative sheet around a decorating portion of the same during preforming. This reduces local strains in the decorative portion of the sheet and ensures a uniform thickness distribution of the sheet to prevent breaking and creasing of the sheet.

Abstract: An apparatus and method for repairing the junction of a sewer main line and a lateral pipe includes a generally T-shaped flexible translucent urethane inflatable bladder having a main line portion and a lateral portion. The lateral portion is inverted through the main line portion and extends out one end thereof. A liner assembly of resin absorbent material is formed, with a tubular lateral liner connected to a flat sheet main liner, at a central opening in the flat sheet liner. Each liner is coated with a polymer coating, for an airtight seal, and a polymer tape is welded to the polymer coating on the lateral liner and the junction of the lateral liner and flat sheet, to form airtight seals. The liner assembly is then installed in the bladder assembly, by threading the lateral liner into the lateral bladder until the flat sheet contacts the main line bladder. The lateral liner is then impregnated with uncured resin and the liner/bladder assembly is installed on launcher.

Abstract: An apparatus and method for inserting a new service pipe into an existing service pipe without the necessity of excavation or separately shutting off the supply of gas upstream of the effected pipe section comprises of a nosecone allowing a flow of sealer to travel back through an annular space between the new pipe and the old pipe, providing a gas tight permanent seal.

Abstract: A method for lining an underground sewer pipe: (a) preparing a tubular liner made of a tubular fabric layer soaked with a thermosetting liquid resin and two layers of airtight film with which inner and outer walls of the fabric layer are covered; (b) inserting the liner assembly into the tubular conduit from the front end by pulling the front end with a rope; (c) inflating the tubular liner assembly after closing the front and the rear ends thereof; (d) heating the thermosetting resin to thereby harden the fabric layer of the liner assembly; and (e) removing those portions of the tubular liner assembly which do not partake in lining the tubular conduit.

Abstract: A pipe repair apparatus includes an outer carrier tube, an inner bladder tube within the carrier tube, and a repair sleeve within the bladder tube. The bladder tube and the carrier tube are formed by one unitary tube which is folded back upon itself. A wick extends from the repair sleeve to the rear end of the bladder tube and permits evacuation of gases from the bladder tube when the bladder tube is flattened by a vacuum during insertion of a curable resin into the bladder tube at its forward end. The bladder tube can be inverted out of the carrier tube so as to place the repair sleeve in contact with an area to be repaired within a sewer pipe. This method may also be used to repair the damaged joint between a lateral sewer line and a main sewer line.

Abstract: A conduit repair system and method are disclosed for repairing ruptures in underground conduits. One embodiment of the system comprises a repair liner including fusible link twine segments and hook and loop fasteners to allow the tautly wrapping of the repair liner around the inflatable bladder of a carrier and to secure the repair liner in place by attaching fusible link twine segments to the leading and trailing edges of a carrier. Another embodiment of the system includes a hook and loop fastener to directly engage the repair liner to the bladder, in combination with a water base releasing agent coated on the bladder, with or without the use of the fusible link twine segments.

Abstract: A branch pipe liner bag is provided for reliably lining a branch pipe even having a curved portion. The branch pipe liner bag has a tubular resin-absorbent material having a flange formed at one end thereof, the outer surface of which is covered with a highly air-tight film. The tubular resin-absorbent material is impregnated with an unhardened hardenable resin, and a separable tube is attached to the flange. According to this invention, since the separable tube is attached to the previously hardened flange of the branch pipe liner bag, the separable tube will never be torn or cut even if the branch pipe liner bag is everted and inserted into a branch pipe having a curved portion with a high fluid pressure, or even if the film covering the branch pipe liner bag is heated and therefore softened by a heat medium or heat generated by the hardening of the thermosetting resin.

Abstract: A decorative sheet formed by coating a surface of an acrylic resin sheet having a coefficient of kinetic friction with respect to a flat glass plate in the range of 0.2 to 0.9 and a glass transition temperature of 80.degree. C. or below with a pattern layer is inserted in a female mold and a male mold of an injection mold, the decorative sheet is clamped to the female mold, the female and the male mold are joined together to form a cavity in the injection mold, a fluid resin is injected into the cavity so as to fill up the cavity, the resin filling up the cavity is solidified in a sheet-decorated molding having a surface coated with the decorative sheet, the injection mold is opened and the sheet-decorated molding is ejected from the female mold.

Abstract: A method for bonding tubes into an article, each of which is formed from a thermoplastic polymer, especially an aliphatic polyamide. The article has a plurality of channels into which tubes are placed in sliding engagement. The article is moved towards a heating block having pins, such that a pin is inserted into each tube. The article and heating block are brought into a juxtaposed position such that the polymer of the tubes melts and forms a coating on said article. The method is particularly useful in the formation of tubed heat exchangers, for example with 100-300 or more tubes, in one cycle.

Abstract: An apparatus for the installation of an inverted resin impregnated flexible tubular liner in a lateral passageway from a main passageway while permitting the flow of fluids through the main passageway during the installation process is provided. A cylindrical body with an opening to coincide with and interact with the lateral passageway has an expandable bladder on its outside with an opening coincident with the body opening and an elbow portion on the inside which is firmly attached at the opening. An air supply inflates the bladder. A tubular elbow is attached to a flexible hose at its proximal end, the hose having a gland for injecting fluid into the hose for inverting and curing the liner.

Abstract: A method for manufacturing a film-coated article by the following steps. A pre-molded film having a backing surface and a decorative surface is formed in the shape of the molded article. The film includes an opening that allows the molted plastic to pass through the film. The film is placed within a mold press having a mold with a cavity surface and a movable core. The mold includes an resin inlet with an inlet surface. The film is placed on the mold with the decorative surface juxtaposed the mold. The opening on the film overlies the resin inlet. The mold is closed and the film held securely in place against the inlet surface. A molten plastic material is injected through the resin inlet. The plastic material passes through the film and fuses to the backing surface. After the article has cooled, the press is opened. The molded article is retained on the core and removed from the press.

Abstract: A method of repairing an existing pipeline including a main pipe and a branch pipe, includes the steps of introducing a first lining pig, a first batch of a resin, and some other pigs into the branch pipe and supplying a first batch of a liquid into the branch pipe until the first lining pig reaches a branching position; introducing a second lining pig, a second batch of a resin, and some other pigs into the main pipe and supplying a second batch of a liquid into the main pipe until the second lining pig reaches an inner end thereof; drawing back the second batch of the liquid out of the main pipe so as to cause the second batch of the resin to move back toward an open end of the main pipe, thereby forming a resin lining layer on the internal surface of the main pipe; drawing back the first batch of the liquid out of the branch pipe so as to cause the first batch of the resin to move back toward an open end of the branch pipe, thereby forming a resin lining layer on the internal surface of the branch pipe.

Abstract: Apparatus and method for producing reduction in maximum width in plastics lining pipes includes at least one pair of reducing rolls through which the lining pipe is forced from upstream thereof. The rolls are disposed and configured to present a roll throat of effective ovality, defined by the percentage difference between the maximum dimension normal to the axes of rotation and the maximum dimension parallel to the axes of rotation, in the range of 5% and 30%.

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 which includes an adjustable sealing arrangement 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 the inflatable bladder and against the collar for sealing the lateral/main pipe junction.

Abstract: An apparatus and method for sealing an underground junction between a lateral service line and a main pipeline from the inside-out. One embodiment provides a substantially rigid patching apparatus which may be positioned and installed with a robotic device within a main pipeline. The patching apparatus has a flange shaped to fit the internal diameter of the main pipeline and a tubular stem or sleeve which penetrates into the lateral service line. The patching apparatus contains an interconnection substrate such as felt, sponge or other similar material. The interconnection substrate may be impregnated with a bonding agent which sealingly interconnects the patching apparatus to the main pipeline and lateral service line. The seal provided by the inverted-tee patch effectively eliminates most water intrusion or the influx of plant roots and other matter which can seriously damage or obstruct the main pipeline.

Abstract: A modified bitumen sheet material and method for a protective moisture barrier, particularly for masonry surfaces. The sheet material has a bitumen layer modified by the addition of a minor amount of a long-chain polybutadiene-isocyanate urethane polymer and optionally, a modifying amount of a hydrocarbon oil to provide a stable, non-flow and selected tackified surface properties to the bitumen layer. The sheet material includes a releasable casting paper film on one surface of the bitumen layer, to be removed prior to use, and a cross-linked polyethylene film bonded to the other outer surface of the bitumen layer as a handling or moisture barrier sheet. The sheet material is prepared by casting the hot, melted bitumen as a layer onto a casting paper sheet and applying the outer film to the exposed bitumen surface to bond to the top surface.

Abstract: An economical branch pipe liner bag is provided. The branch pipe liner bag allows for a reduction in manufacturing cost, stabilized quality, and mass-production, and does not have any portion to be wasted when used. One end of a tubular resin absorbent material impregnated with an unhardened hardenable resin is outwardly folded and pressed to form an extension which is sandwiched between separate flange forming members to form a flange at the one end of the tubular resin absorbent material, thus constructing the branch pipe liner bag. Since the branch pipe liner bag has the flange formed at one end by integrally coupling the flange forming members, which are members separate from the tubular resin absorbent material, the flange forming members can be mechanically mass-produced independently of the tubular resin absorbent material, with the result that a manufacturing cost of these flange forming members is reduced, and consequently a manufacturing cost of the branch pipe liner bag is reduced.

Abstract: A method and apparatus for transferring a pre-molded film into a cavity by the following steps. A robotically controlled arm having a loader receives flexible film. The loader by two moveable end portion and a main portion there between. The pre-molded film is transferred onto the loader. The end portions are retracted so that the loader is in a retracted position. The loader is moved to a position within a cavity. The cavity has an opening that is larger then the loader when the loader is in the retracted position. The film is transferred to the cavity by aligning the film with corresponding three-dimensional contours on the cavity. The edge portions are extended so that essentially the entire surface of the film contacts the cavity. The loader is withdrawn from the cavity by first retracting the end portions and removing the loader.

Abstract: A dual containment pipe system suitable for installation into an existing conduit includes a new secondary containment pipe with a plurality of substantially uniform internal studs and a new primary containment pipe up against the studs. An annular space is formed between the pipes by the studs which provides space along the length of the conduit for installation of leak detection systems including cables or perforated conduits for removing liquids or purging the annulus. The impervious new primary containment pipe may be cured in place, folded and formed, diameter reduced pipe, or any other pipe suitable for pipeline rehabilitation. A manhole system for connection of service laterals to the main line pipe which maintaining dual containment utilizing closure pieces for the main line coupled to a bellow fitting and service lateral riser tee is also disclosed.

Abstract: A lined tubular assembly and a method and apparatus for lining an elongated tubular article to form the assembly. The lined tubular assembly has a metal tube with a non-metallic liner bonded to the internal surface thereof by a bonding agent. A non-metallic flanged end piece is secured to each end of the metal tube and has a first portion extending into the tube between the liner and the internal surface of the tube and a second portion covering the end surface of the tube. The method for producing the assembly includes introducing simultaneously into the tubular article both a tubular liner and a bonding agent for bonding the liner to the internal surface of the tubular article. The apparatus for producing the assembly includes an elongated liner installation device that simultaneously introduces the liner and bonding agent to the interior of the tubular article.

Abstract: An apparatus for repairing a pipeline includes an elongated flexible tube with one end inverted upon itself to create an outer inverted portion and an inner non-inverted portion connected at an inversion end. An elongated sleeve-shaped liner impregnated with rosin is fitted within the non-inverted portion of the tube member in contact with the interior surface thereof. A plurality of attachment strips are frangible connected at one end to the liner, and permanently affixed to the tube inner surface, such that inversion of the tube member will cause the attachment strips to invert to the exterior of the inverted portion, and thereby also invert the liner to the exterior surface of the inverted portion of the tube.

Abstract: Plastic-lined fittings and their method of manufacture. The fittings are capable of being joined without flanges to plastic-lined piping systems. The fittings feature a zero tolerance fit between the liner and the metal portion of the fitting, and an outward expansion of the portion of the liner which extends past the metal portion.

Abstract: An apparatus and method for repairing the junction of a sewer main line and a lateral pipe includes a generally T-shaped inflatable bladder having a main line portion and a lateral portion with resin absorbent liner wrapped around the main line portion and lateral portions of the bladder. The liner is impregnated with uncured resin, and the lateral bladder is then inverted within the main line bladder, thereby inverting the lateral liner along with the lateral bladder. The liner/bladder assembly is positioned within a main line pipe with the lateral bladder coaxially aligned with a lateral pipe, to repair the junction between the lateral pipe and the main line pipe. Fluid is then introduced within the main line and lateral bladders to extend the lateral bladder into the lateral pipe, and to radially expand both the main line and lateral bladders to force the liners into contact with the main line pipe and lateral pipe.

Abstract: A tubular branch pipe liner is proposed, which has a rigid collar at its end and to this collar is attached a protector consisting of a first portion which is out-spread downwardly and curved to fit on the lower face of the collar and is fixed thereto, a second portion which is roughly cylindrical and fitted into the inner peripheral face of the collar and the inner wall of a little part of the tubular branch pipe liner which is immediately continuous from the collar, and a third portion which extends downwardly and terminates in an annular end face at a location substantially lower than the joint where the first portion and the second portion meet; also proposed is a pipe lining method, which comprises the steps of preparing a branch pipe liner with a collar; and attaching the above-mentioned protective member to the collar; and lining a branch pipe with the tubular branch pipe liner; and lining the main pipe with a conventional main pipe liner; and cutting a hole through that circular portion of the main pi

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: The invention provides that flexible lining tubes for application to underground pipelines and passageways comprise absorbent material which is impregnated with curable synthetic resin which can be cured when the tube is placed on the pipeline or passageway surface so that a rigid pipe within the pipe is formed. The curing of the resin is controlled by filling the curing agent into micropores or microporous particles which are dispersed throughout the resin. The curing agent is only released when the resin is subjected to applied energy such as sonic and/or heat energy. A preferred method is to include CURIE temperature magnetic particles in the resin and to excite (and thus heat) the magnetic particles by applying an alternating high frequency magnetic field. The heat from the magnetic particles opens the microporous particles and causes desorbence of the curing agent and then cure of the resin.

Abstract: The invention provides a tailored assembly of a flexible resin absorbent material (22, 24, 26). It is in the form of a "T" and is of tubular cross section. The arms of the T are intended to lie on the surface of a main underground pipe which the leg of the T extends into a lateral pipe which connects with the main pipe. The whole assembly is soaked in curable synthetic resin and it is placed in position and held there whilst resin cures by means of an inflatable bag (28) which is located inside the assembly and is also tailored to T configuration.

Abstract: Provided is a pipe and pipe liner composition including PVC, a PVC-hydrogen bonding modifier and a PVC-polar bonding modifier.

Abstract: A branch pipe liner bag and a pipe lining method are provided for ensuring to securely joining a flange and a main pipe liner bag to provide a reliable integrated structure. The branch pipe liner bag comprises a tubular resin-absorbent material impregnated with an unhardened hardenable resin. The tubular resin-absorbent material is formed at one end thereof with a rigid flange which is formed with a plurality of bores. In the pipe lining method using the branch pipe liner bag, a portion of unhardened hardenable resin oozing from a main pipe liner bag enters the bores formed through the flange of the branch pipe liner bag and is hardened therein, so that the flange is securely joined with the main pipe liner bag, thereby preventing a gap from being formed therebetween. In addition, the bores may be arranged on concentric circles on the flange, and cords made of a resin-absorbent material may be passed through the bores along the inner or outer periphery of the flange.

Abstract: A cured in place lateral seal impregnated with a curable resin in the form of a "floppy top hat" for sealing the connection between an existing main conduit and a lateral connection is provided. The seal includes a brim portion bonded to a relatively short tubular section with the resin impregnable surfaces facing each other. The seal is formed by placing an annular ring about an opening in a template in the form of a pipe having a dimension and opening corresponding to the existing conduit and lateral, placing a tubular section of cured in place lining through the ring and the opening and bonding the tubular portion to the brim portion. The seal is impregnated with a resin by sealing the end of the tubular portion and then by placing the seal into a container with resin and drawing a vacuum to wet out the impregnable layer.

Abstract: A method of everting a pipe liner bag into a pipeline which enables smooth eversion of a pipe liner bag using a minimally required amount of lubricant. When a pipe liner bag including a resin absorbent material impregnated with a hardenable resin and a plastic film covering the outer surface of the resin absorbent material is everted into a pipeline using a fluid pressure, the pipe liner bag is applied with oil (lubricant) on the outer surface thereof. Since the application of oil is performed immediately before everting the pipe liner bag, the pipe liner bag can be smoothly everted into the pipeline only using a minimally required amount of oil.

Abstract: An elastomeric flange lining is provided for the metal flange of a pipe, the flange lining being structured with an annular channel with allows lateral movement of the elastomeric material of the flange lining when the flange lining is subjected to high compression forces, such as when two pipes are joined together end-to-end at their respective pipe flanges. The design of the flange lining and manner in which the flange lining is produced prevents outward bulging of elastomeric material into the interior of the pipe when subjected to compression forces. A flange mold for forming the flange lining is disclosed, and the method of making the flange lining is also disclosed.

Abstract: A spindle assembly for a machine tool generally including a first housing having a bore provided with a lining formed of a structural polymer, a second housing disposed in the first housing bore in sliding engagement with the lining therein, a first spindle journaled in the first housing, a second spindle journaled in the second housing in axial alignment with the first spindle and operatively connected thereto for axial displacement relative thereto and rotational movement therewith and means for displacing the second housing relative to the first housing to correspondingly axially displace the spindles.

Abstract: A method of sealing a polymeric lining of a manhole and the sewer lines communicating with the manhole which comprises forming insitu an integral substantially continuous monolithic polymeric coating or lining on the interior surface of the manhole adhered to the interior surface and substantially simultaneously forming a generally tube-shaped polymeric sealing member coaxially aligned with the manhole opening having an interior diameter generally equal to the interior surface of the manhole opening which is integral and continuous with the polymeric lining of the manhole preferably by spraying the interior surface of the manhole with a polymeric material having an isocyanate-terminated compound, most preferably a polyurea, then substantially simultaneously forming the tube-shaped polymeric sealing member of the same material as the manhole lining.

Abstract: A tube which is normally in a collapsed position and which has an inner layer, suitably of felt. The free end of the tube is pulled apart and a pool of resin is located within the tube. Opposed driven rollers then pull the free end of the tube to assist in the dispersion of the resin in the felt. To assist in the resin impregnating the felt a vacuum is applied to urge the felt on either side of the collapsed tube so that the sides are more towards each other in the region of the pool of resin. In order for the vacuum to be able to be applied in the region of the pool of resin the vacuum is applied to the trailing end of the tube and an insert comprising a strip of material that is less prone to collapse than the felt of the tube is located along the inside of the felt.

Abstract: Rigidifiable composites are formed by stitching a reinforced B-stage resin sheet stock to form a three-dimensional preform. The preform is subsequently rigidified by initiating final cure of the resin. Molded articles, inflatable and other structures, such as, tank, tunnel and sewer liners are some of the typical structures which can be formed by the methods of the invention. Control of thread count, thread tension and thread spacing can be used to consolidate multi-ply or layered preforms, which, upon cure, can have up to 90% of the load carrying capacity of compression molded fiber reinforced articles.

Abstract: There is provided a method of lining the internal surface of a pipe involving a larger diameter portion, said method comprising the steps of inserting a first pig into the pipe from an open end thereof, said first pig being a spherical body made of a resilient material having a diameter larger than the pipe inner diameter and having a number of grooves formed on the surface thereof for permitting air escape, injecting behind the first pig a necessary amount of resin into the pipe, inserting behind the resin a second pig into the pipe, said second pig having a diameter smaller than the pipe inner diameter such that a resin lining layer having a desired thickness may be formed on the internal surface of the pipe, providing a positive pressure and applying the positive pressure behind the second pig in the pipe, and causing the first pig, the resin and the second pig to move through the pipe along the entire length thereof by the positive pressure, so as to form a resin lining layer on the internal surface of th

Abstract: A thermoplastic liner is extruded in cylindrical form and deformed at a temperature below the crystallization temperature of the polyethylene material forming the liner into a generally W-shaped configuration. The liner in that configuration has three convex lobes and two concave lobes along one side of the liner with a convex portion of the liner wall along the opposite side. The cylindrical liner is initially extruded in cylindrical form and deformed by a series of axially spaced sets of rollers progressively inclined toward a vertical position wherein the final W-shaped configuration of the liner is formed. The liner has a cross-section in any direction less than one-half of the diameter of the liner when expanded into a cylindrical configuration. The deformed liner is coiled about a reel. At an installation site, the liner is pulled from the reel through the pipe and sealed at opposite ends. Steam under pressure expands the W-shaped liner to a cylindrical configuration to line the pipe.

Abstract: An apparatus for inserting a lining material into a pipeline includes an elongated carrier device having a hollow central portion which encloses a liner-bladder assembly. The liner-bladder assembly includes an elongated inflation bladder which engages an open end of the carrier device and expands under fluid pressure out of the carrier device. The pipe liner is frangibly attached to the inflation bladder such that its attachment anchors the liner with respect to the open end of the carrier device to permit accurate placement of the liner within a pipeline proximate to a compromised section of the pipeline. The frangible connection breaks when the carrier device and inflation bladder are removed from the pipeline.