Abstract: A laminated tape comprising a main layer of a polyester-series thermoplastic polyurethane resin and a covering layer formed of a soft vinyl chloride resin fused with at least one surface of the main layer is spirally wound, and its adjacent side edges are bonded each other to form a hose wall. The shrinkage ratio of the length of the hose in an unloaded condition is 25% or less relative to the original length of the hose as determined by measuring the original length and the length of the hose after the test which comprises subjecting the hose compressed in a longitudinal direction to ten heating/cooling-cycles successively, one cycle comprising a heating step for exposing the compressed hose to an atmosphere of 70.degree. C. for two hours and a cooling step for cooling the heat-treated hose at an atmosphere of -20.degree. C. for two hours, followed by returning the temperature of the hose to an ordinary or room temperature and allowing the hose to stand for one hour.

Abstract: A method of producing large-diameter helical pipes for plastic synthetic resins wherein the pipe has an outer layer comprised of a first plastic resin and an inner layer comprised of a second plastic resin. In a particularly preferred embodiment, a helical pipe having an outer layer which is an ultraviolet light-protective color and an inner plastic layer which is a light-reflecting color is provided.

Abstract: A spoolable composite tube capable of being spooled onto a reel for storage and for use in oil field applications. The spoolable tube exhibits unique anistropic characteristics that provide improved burst and collapse pressures, increased tensile strength, compression strength, and load carrying capacity, while still remaining sufficiently bendable to be spooled onto a reel in an open bore configuration. The spoolable composite tube can include an inner liner, an interface layer, fiber composite layers, a pressure barrier layer, and an outer protective layer. The fiber composite layers can have a unique triaxial braid structure.

Abstract: A metal pipe and method of forming the same with an integrally formed liner for use in corrosive and abrasive environment utilizes a liner formed of a comparatively thick polymer which is thermally bonded to the metal pipe. An intermediate polymer/adhesive layer is applied to the metal pipe to facilitate thermal/chemical bonding. The intermediate layer is preferably applied to the sheet metal in a pre-treatment process prior to roll forming ribs into the sheet metal. The polyethylene liner is applied after the pipe has been formed, to provide a smooth, hydraulically efficient surface which is resistent to the corrosive action of sulfuric acid and the like encountered in sanitary applications, as well as abrasion caused by the flow of water-born debris such as dirt and gravel as is encountered in culvert applications.

Abstract: An externally supported, tape-reinforced tubular prosthetic graft and method of manufacturing therefore. The graft comprises a tubular base graft formed of expanded, sintered fluoropolymer material, a strip of reinforcement tape helically wrapped about the outer surface of the tubular base graft and attached thereto, and, an external support member helically wrapped around the outer surface of the reinforcement tape and attached thereto. The helical pitch of the reinforcement tape is different from the helical pitch of the external support member. Preferably, the helical pitch of the reinforcement tape is in a direction which is opposite the direction of the external support member.

Abstract: A flexible hose which is formed by attaching a resin reinforcing coil member to a cylindrical body, the cylindrical body being composed of a nonwoven fabric layer which is formed by winding a nonwoven fabric tape spirally and connecting adjacent side end portions and an air-cut layer which forms on at least one side of the nonwoven layer. The nonwoven fabric tape and the reinforcing coil member are formed of heat-fusible resin materials, and the reinforcing coil member is fused with the nonwoven fabric layer in a body.

Abstract: A tubular body which can be applied to a cylindrical carrier body and removed from it again, being characterized in that a first layer (10) of a wound narrow strip material (6) with a first pitch (12) is covered by another material.

Abstract: A multi-walled steel pipe includes at least two pipe bodies of different diameters. The two pipe bodies are overlapped with one another. Either the inner surface of the outer pipe body or the outer surface of the inner pipe body is a rough surface having a roughness of 10 to 30 .mu.m. The rough surface is made by brasting, etching, or brushing or by the use of rolls. At least one of the overlapping surfaces is plated with copper to provide a brazing layer by which the overlapping surfaces are brazed together. The pipe bodies are double-walled stainless pipes, seamless stainless pipes, or electroseamed pipes.

Abstract: Cast iron pipe and other elongated hollow articles are lined with a cementitious mortar for certain applications, such as the transmission of potable water or sewage. To improve the resistance to attack from acids and to provide a crack and holiday free cement lining, a calcium alumina cement is used to line the article. A plasticizer such as fireclay is added to the calcium alumina cement prior to its application. The cement lined article is then coated with an asphaltic based coating and then cured in a high humidity environment.

Abstract: A liquid-impervious tube, includes at least one first band helically wound on itself, characterized in that this first band is porous and pervious to gaseous fluids and in that it includes a second thin band which is pervious to gaseous fluids and impervious to liquids, and which is also helically wound on itself, with partial overlapping of its turns, said turns being secured to one another in a impervious manner so that the second band defines a liquid-impervious continuous covering.

Abstract: A flexible synthetic resin tube is provided by uniting an inner layer of a polyether-series thermoplastic polyurethane resin with a hard synthetic resin spiral reinforcement (e.g. a hard vinyl chloride resin) or a soft synthetic resin outer layer (e.g. a soft vinyl chloride resin), through an interposed adhesive intermediate resin layer. The polyurethane resin includes a resin having a diol composed of a tetramethylenoxy unit as a polyol component. The spiral reinforcement may be buried in the outer layer. The intermediate resin layer may comprise a mixture of the polyether-series thermoplastic polyurethane resin, and the synthetic resin for the spiral reinforcement or the outer layer. This tube imparts an enhanced hydrolysis-resistant property to the polyurethane resin forming the inner layer, and an improved adhesive strength between the inner layer and the spiral reinforcement or the outer layer.

Abstract: A composite tubular member having an outer generally cylindrical member containing fibers oriented to resist internal and external pressure and provide low bending stiffness, and two inner areas of axial reinforcement located near the neutral axis of the composite tubular members containing fibers oriented to provide high axial stiffness, high tensile strength and low bending stiffness; and fibers oriented to resist shear stress, positioned opposite each other within the walls of the outer member. These inner areas define a minor moment of inertia of bending extending diametrically through said inner areas and a major moment of inertia of bending generally orthogonal to said minor moment of inertia. Energy conductors integral to the tubular member are arranged in a plane along the minor moment of inertia formed in the tubular member.

Abstract: An abrasion resistant composite hose comprises (a) an outer layer composing a spiral tape of a soft synthetic resin, where adjacent side edges of the spiral tape join each other to form the outer layer, (b) a spiral reinforcement of a hard synthetic resin for retaining and reinforcing the outer layer, and (c) an inner layer comprising a spiral strip formed by a rubber, where adjacent side edges of the spiral strip join each other to form the inner layer, and the outer layer and inner layer join each other. In such a composite hose having this structure, at least a periphery of the strip except an exposed surface to an inner surface of the hose is covered with a covering element comprising a rubber adhesive to the soft synthetic resin constituting the outer layer, and the rubber strip is formed by a rubber having higher abrasion resistance than the covering element to obtain a composite hose having enhanced abrasion resistance.

Abstract: A flexible supply line to connect media transporting underground supply lines includes a metal corrugated bellows, a connection member at each end of the metal bellows and a flexible wrap wrapped along the metal bellows and the connection members. The invention also includes a method for attaching the wrap to the metal bellows.

Abstract: A synthetic resin tube comprises an internal layer which is made of non-rigid synthetic resin and has a substantially smooth inner circumferential surface, and an external layer which is formed by winding a strip made of rigid synthetic resin around an outer circumferential surface of the internal layer overlapping winds of the strip and connecting the external layer with the internal layer, a cross section of the strip being S-shaped. When the external layer is formed, adjacent winds of the strip are connected temporarily and capable of being disconnected. After the external layer is formed, flexibility can be given to an optional length of the tube by removing the temporary connection among the winds of the strip.

Abstract: A core for core wound paper products. The core is made by wrapping dual plies in a spiral pattern and adhering the plies together. The edge of one ply overlaps the ply gap of the other ply, preventing a single ply thickness from occurring anywhere on the core. Alternatively, the edge of each ply may overlap the ply gap of that respective ply. In yet another embodiment, the overlap may be formed by a separate ply applied to either ply.

Abstract: A method of forming a hollow elongated or tubular body consisting of the steps of winding one or more strips of material in self-overlapping fashion to produce a multi-layer tubular structure, the or each strip prior to winding being pre-formed to provide a transverse cross-section having at least one step which, in each convolution of the strip accommodates the overlapping portion of the next convolution.

Abstract: A high shear adhesive tape having an adhesive layer containing a rubber mix and at least one tackifier agent, the rubber mix including an effective amount of a crosslinked halogenated butyl rubber, the remaining rubber in the mix being non-crosslinked, the non-crosslinked rubber preferably being butyl rubber, the adhesive layer further being characterized as being free of any crosslinking agent for the remaining rubber in the mix; and pipewrap systems employing this tape.

Abstract: Fire resistant pipes and pipe fittings include a structural pipe wall formed from helically wound reinforcing fiber that is bonded together with a thermoset polymer resin selected from the group consisting of phenolic resins, siloxane-modified phenolic resins, furan resins, and mixtures thereof. In a first embodiment, a resin rich fire resistant layer is applied to the surface of the structural pipe wall. The carrier is capable of accommodating a large amount of resin. The resin used to impregnate the carrier is selected from the same group of resins used to form the structural pipe wall. It is desired that both resins be compatible, and preferably be the same, to facilitate forming a bond between the structural pipe wall and the fire resistant layer during cure.

Abstract: A combination rubber/composite hose comprising an inner composite hose section and a surrounding outer rubber textile reinforced hose section sealingly fastened together at their ends, but free to shift longitudinally and bend with respect to each other.

Abstract: Fire resistant pipes and pipe fittings include a structural pipe wall formed from helically wound reinforcing fiber that is bonded together with a thermoset polymer resin selected from the group consisting of phenolic resins, siloxane-modified phenolic resins, furan resins, and mixtures thereof. A jacket is disposed around the structural pipe wall and comprises alternating release layers and fiber-reinforced resin layers. The release layer is formed from a material that is incompatible with the resin of the structural pipe wall and fiber-reinforced resin layers, and is energy absorbing to improve impact resistance and reduce thermal stress. The jacket is formed having a sufficient number of alternating layers, having sufficient layer thicknesses, to protect the structural pipe wall from heat induced failure produced by exposing the outermost pipe wall to a 1,000.degree. C. flame for at least five minutes in a dry condition.

Abstract: A core for core wound paper products. The core is made by wrapping dual plies in a spiral pattern and adhering the plies together. The edge of one ply overlaps the ply gap of the other ply, preventing a single ply thickness from occurring anywhere on the core. Alternatively, the edge of each ply may overlap the ply gap of that respective ply. In yet another embodiment, the overlap may be formed by a separate ply applied to either ply.

Abstract: A fiber reinforced plastic pipe comprising a cylindrical inner layer formed by winding a prepreg sheet containing a thermosetting resin as a matrix and an outer layer formed by winding a thermoplastic resin sheet or tape around the inner layer, said inner and outer layers being heat cured and thermocompression bonded in one united body; and a process for manufacturing the fiber reinforced plastic pipe. When the fiber reinforced plastic pipe is manufactured, the thermosetting resin is used for forming the inner layer and the thermoplastic resin is used for forming the outer layer. Moreover, a metal coat can be firmly bonded to the surface of the outer layer. Hence, a fiber reinforced plastic pipe prominently improved in impact resistance, abrasion resistance and lightweight properties can be provided.

Abstract: A pipe and method of manufacture of the pipe are described. The pipe comprises a core of helically wound steel strip embedded in a plastics material matrix and lined with inner and outer linings of filament wound fiber reinforced plastics material.

Abstract: A composite concrete pipe in which both the inner and outer surfaces are plastic. The pipe may be formed of any diameter by forming the inner and outer plastic surfaces from helically wrapped interlocking plastic strips to form the diameters desired.

Abstract: Method for the production of a silicone-based fire-proof protection article. The protection article includes an inner polymerized unfilled silicone coating (3) adhering to an object (2) to be protected, and a fire-resistant fibrous jacket (5) carried by said inner coating (3), without adhering to it. The protection article can be used for the protection of pipes, especially hydraulic pipes.

Abstract: A reinforced flexible pipe includes an impermeable hose and a reinforcement tube composed of an interlacement of flat rovings wound helically about the axis of the hose. Each flat roving is constructed of a plurality of filaments, such as wires. The interlacement of the coaxial reinforcement tube includes metal tapes helically wound about the axis of the hose and interlaced with the flat rovings.

Abstract: A multi-grade spirally wound paperboard winding core of enhanced resistance to inside diameter deformation includes a plurality of structural paperboard layers having at least two predetermined densities including a lower density and a higher density wherein the lower density is at least about 3% less than the higher density. The cylindrical bodywall is defined in radial cross section by at least one centrally located paperboard layer disposed between at least one radially inwardly located structural paperboard layer and at least one radially outwardly located structural paperboard layer. The centrally located paperboard layer is formed from the lower density paperboard and the inwardly and outwardly located structural paperboard layer are formed from higher density paperboard.

Abstract: Methods of producing electrically fusable sleeve connectors for connecting large diameter thermoplastic pipe sections and the sleeve connectors produced by such methods are provided. Methods of sealingly connecting adjacent ends of a pair of large diameter thermoplastic pipe sections by electric fusion are also provided. The methods of producing electrically fusable thermoplastic sleeve connectors broadly include the steps of winding a tape of molten thermoplastic material onto a large diameter core drum whereby adjacent windings are fused and upon being cooled a solid sleeve is formed, embedding an electric resistance heating wire in a surface of the sleeve while the thermoplastic material is still in the molten state and removing the sleeve after cooling with electric resistance heating wire embedded therein from the core drum.

Abstract: The invention provides spirally wound paperboard cores for winding of textiles and other materials and which have enhanced high speed winding capability. The spirally wound paperboard plies forming the body wall of the paperboard core have a predetermined spiral winding angle with respect to the axis of the cylindrical body wall of greater than 71 degrees. In winding cores having a relatively large ID of between about 4.8 in. (120 mm) and 6 in. (150 mm), the paperboard plies forming the spirally wound cores have a winding angle of greater than 74 degrees. In winding cores having a lower ID of less than 4.8 inches (120 mm), all of the paperboard plies have a width of 3.5 in. (89 mm) or less and a spiral winding angle of greater than 71 degrees.

Abstract: A paper tube and method of making the same, having plastic end ring supports and a uniform inside diameter and uniform outside diameter, end-to-end, including the supports. The tube is formed from a multiple ply paper wall. A poly-coated ply is formed at the midpoint of the wall thickness. An annular cut is made interiorly within each end to the poly-coated ply midpoint. A section of wall defined by the cut is removed creating an annular rabbet within each end. An end support ring is inserted in each end. The ring has a body section with an outside diameter equal to the outside diameter of the tube and an inside diameter equal to the inside diameter of the tube. An annular collar extends from one side of the ring body. The collar has an outside diameter equal to the inside diameter of the rabbet. The collar seats in the rabbet and the body abuts the end of the tube resulting in a tube having uniform outside diameter and uniform inside diameter, end-to-end, including the support rings.

Abstract: A fuel hose is provided which can be cured into a predetermined shape and which contains a layer of material which, in the final form of the hose, provides a continuous barrier to permeation of fuel through the walls of the hose. A method of making such a hose is disclosed which includes steps added to known hose manufacturing methods, using a thin fuel impermeable tape, which may include a continuous metallic layers and which is wound helically about an inner uncured tubular rubber extrusion with the edges of the tape overlapping. The tape has a heat activated adhesive thereon which will function, when an outer uncured rubber layer is added and the composite uncured hose is placed in an autoclave for vulcanization, to form a continuous impermeable intermediate layer in the hose.

Abstract: The invention provides multi-grade spirally wound paperboard tubes of enhanced flat crush strength construction. The multi-grade spirally wound paperboard tubes of the invention include a plurality of structural paperboard plies having at least two predetermined densities including a lower density and a higher density wherein the higher density is at least about 3% greater than the lower density. The cylindrical bodywall is defined in radial cross section by at least one centrally located paperboard layer disposed between at least one radially inwardly located structural paperboard layer and at least one radially outwardly located structural paperboard layer. The centrally located paperboard layer is formed from the higher density paperboard and the inwardly and outwardly located structural paperboard layers are formed from lower density paperboard.

Abstract: A flexible, kink-resistant, introducer sheath for percutaneous vascular access. The introducer sheath includes a flat wire coil with uniform spacing between the turns, which is compression fitted about an inner, lubricous material polytetrafluoroethylene tube. The introducer sheath further includes an outer tube of a heat formable polyamide material which is heat formed and compressed through the spaces between the turns of the wire coil to mechanically connect to the roughened outer surface of the inner tube. The distal end of the outer tube is tapered in a mold with additional polyamide outer tube material. The proximal end of the sheath is flared for connection to a connector fitting. In another aspect of the introducer sheath, the flat wire coil has an inner diameter less than the outer diameter of the inner tube. The coil is then expanded and wrapped around the inner tube to form a compression fit.

Abstract: A paper tube consisting essentially of one or a plurality of paper tapes formed into a tube and a blend adhesive comprising two or more aqueous adhesives different in their concentrations adhering the paper tapes, its production and a package using it. In the paper tube, the adhesive can be coated into a thin film layer even at a high concentration without reducing the initial adhesive force, and the drying process after the coating can be omitted.

Abstract: Provided is a laminated tube having a logarithmic decrement of at least 0.08 and a flexural modulus of at least 1,000 kg/mm.sup.2 and comprising at least 2 layers which comprise a composite material comprising a reinforcing fiber and a matrix resin. The reinforcing fibers used include an organic fiber, e.g. wholly aromatic polyester fibers and polyvinyl alcohol fiber, for at least 1 layer of the composite material layer and an inorganic fiber, e.g. carbon fiber and glass fiber, for at least 1 layer of the composite material layer.

Abstract: A composite tubular member having an outer cylindrical member containing fibers oriented to resist internal pressure while providing low bending stiffness, an inner smaller centrally located core member located near the neutral axis of the composite tubular member and containing fibers oriented to provide high axial stiffness, high tensile strength and low bending stiffness. One or more web members contain fibers oriented to resist shear stress, and connect the outer cylindrical member and the inner core member to form at least two separate cells within the composite tubular member. The web member forms a major and minor moment of inertia within the tubular member to create a preferred bending direction. Conductors are formed integral to the connecting web member for transmitting energy signals through the tubular member.

Abstract: An anti-fouling covering is applied to a tubular offshore structure to prevent fouling tubular goods by marine growth. The covering comprises metal sheeting which is deformed to provide spaced ridges or troughs which extend on the covering in the axial direction of the tubular goods. The deformations facilitate expansion and contraction of the covering but, especially when inwardly directed trough form, enable the covering to have substantially smooth exterior so that loading due to wave impingement can be reduced.

Abstract: An armoured flexible pipe having one or more of the following components, a pressure resistant armouring, a traction resistant armouring and/or an internal carcase, in which pipe at least one of said components comprises one or more elongated elements such as a shaped piece, a cable, a wire or a strip. The element is formed of a composite material with aluminium alloy matrix comprising reinforcement elements such as particles and/or whiskers.

Abstract: Flexible piping includes a first, spiral-wound band forming an inner winding and a second, spiral-wound band forming an outer winding in covering relationship over the inner winding. Inner and outer spiral-wound bands of insulating material are wound between the inner and outer windings and over the outer winding respectively. An insulating sleeve receives the spiral-wound inner and outer windings and the inner and outer insulating material bands. A method and a machine for forming the flexible piping are also disclosed.

Abstract: An elongate body insulated by means of an insulating covering, said covering being constituted by a tape (2) made of synthetic material taped around said body (1) and covered in a layer of varnish (11) made of synthetic material, the body being characterized in that the taping is such that there exists a groove (4) between the free edge (5) of any portion of a turn (3) that is not covered by the following turns and the uncovered surface (6) of the preceding turn, the width of said groove (4) lying substantially in the range 0% to 5% of the width of said tape (2) and being strictly greater than zero.

Abstract: In a tubular structure for forming a fishing rod, an amorphous metal long fiber tape is spirally or crosswise wound on a prepreg sheet tube with a predetermined pitch, not being overlapped in each turn, so that the prepreg sheet and the amorphous long fiber tape are joined together with high adherence, whereby its twisting strength, collapsing strength and bending strength are improved.

Abstract: A composite hose comprising an inner helical core (1) made of metal, a plurality of layers of plastics material fibres and films (2, 2a, 2b, 2c) wound on the helical core (1), at least one layer of glass cloth (3) and at least one layer (4) of aluminium foil disposed adjacent one another and wound onto the layers of plastics material fibres and films (2) and an outer helical former (7) made of metallic material.In an alternative embodiment, at least one layer of ceramic fibres (5) is wound around the plastics material, which layer (5) is covered by at least one winding of a protective layer (6a; 6b).Such hoses are made by winding the layers successively one upon another on a rotating mandrel.

Abstract: A multiple ply tubular core having continuous vapor barrier layers near the inner and outer surfaces of the tube. The vapor barrier layers have overlying and underlying layers comprising fibrous cellulosic material. The tube is stable to dimensional changes caused by absorption or loss of moisture to the atmosphere.

Abstract: A composite material tube, substantially insensitive to the variations of elongation under the effect of the internal pressure, comprising a number n of stable layers of reinforcement fibers, the fibers of each layer (i) being placed at the same winding angle in absolute value, referenced theta, with respect to the axis of the tube with an equal proportion of fibers wound at said angle in one direction (.vertline.theta.vertline.) as fibers wound in the opposite direction (-.vertline.theta.vertline.), the fibers of each layer being buried in a matrix which adheres to these fibers. The fibers of the same layer and the associated matrix have a volume referenced Y, the parallel fibers of the same layer and the associated matrix having overall a modulus of elasticity in the natural direction of the fibers, referenced E, wherein said n layers of fibers comply as a whole with the following relationship:0.35.ltoreq.A.ltoreq.0.

Abstract: A composite tubular member having an outer cylindrical member containing fibers oriented to resist internal pressure while providing low bending stiffness, an inner smaller centrally located core member located near the neutral axis of composite tubular member containing fibers oriented to provide high axial stiffness, high tensile stremgth and low bending stiffness and web members containing fibers oriented to resist shear stress, connecting the outer cylindrical member and the inner core member to form at least two separate cells within the composite tubular member.

Abstract: A composite golf club shaft and the method of constructing the shaft is disclosed. The hollow circular shaft includes a standard butt end having a constant outside diameter along a length of the shaft and a tip end having a constant outside diameter sustantially larger than the tip of a standard shaft, with the constant diameter of the tip end and butt end extending along predetermined lengths of the shaft. An intermediate section of the shaft tapers between the diameters of the butt and tip ends. The shaft is manufactured by wrapping a group of circumferential sections about a mandrel, each layer comprising either standard modulus carbon-graphite fibers or fiberglass fibers in a matrix, with the finished product being heat-cured to produce a golf club shaft.

Abstract: A method for continuously vulcanizing a self-molding hose by external heating including the steps of first forming continuous strip of self-molding material which includes a heat-shrinkable woven fabric, a first vulcanized elastomer topping layer provided on a top surface of the heat-shrinkable woven fabric, a second vulcanized elastomer topping layer provided on an undersurface of the fabric with the second vulcanized elastomer topping layer being thinner than the first vulcanized elastomer topping layer and an unvulcanized elastomer topping layer provided on the undersurface of the second vulcanized elastomer topping layer. Then the continuous strip is overlappingly wound on a former to create a circular hose and the circular hose is continuously introduced into a gap between rotary drums of vulcanization apparatus at the same rate as the rate of the circular hose formation so that the circular hose is pressed flat, heated and vulcanized and converted into a flat hose.

Abstract: A flat strip-like metallic material having both surfaces coated with a first synthetic resin layer is passed between plural pairs of upper and lower rollers so that a U-shaped recess is formed at the central portion in the longitudinal direction of the strip material and ring-like projection at both edges of the strip material. Then, the strip material is bent into a spiral form. The spirally wound strip material is passed to a transferring means and first, second and third extruders to extrude molten resin and first, second and third pressing rollers operating in association with the respective extruders, whereby a second synthetic resin layer is formed at the outer circumferential portion of the adjoining edges of the spirally wound strip material, a third synthetic resin layer is formed on the back side of the recess portion of the same, and a fourth synthetic resin layer is formed on the outer circumferential surface of the recess portion and the adjoining edges of the spirally wound strip material.

Abstract: A hose for use in marine loading is disclosed in which are disposed two reinforcing layers, one being formed of a selected fibrous cord and the other of a selected steel cord. The fiber and metal layers are laid in this order over a hose core tube, the layers and the core tube being defined in their total thickness not exceeding half the overall hose thickness. The hose is highly resistant to kinking and sufficiently absorptive to pressure on surging.