Abstract: Apparatus is disclosed capable of wrapping both cold-applied and hot-applied strips of sheet material in tape form around a pipe or conduit having a generally circular cross-sectional external shape. The apparatus includes a frame having a desired number of frame cross members for structural support and having a hinged rotatable frame portion; a plurality of guide roller assemblies connected to the frame; a guide roller tensioning assembly; a sheet material feeding assembly; a sheet material tensioning assembly; a guide roller angular adjustment assembly, adjustable to vary the angle of the guide rollers with respect to the conduit being wrapped for varying the amount of sheet material overlap; a cold-applied tape backing material take off and wrapping assembly, and a burner assembly, alternatively attachable to the frame instead of the cold-applied tape backing material take off and wrapping assembly, when hot applied tape is used.

Abstract: Disclosed is a pipe wrapper and cleaner or similar apparatus which includes a rotatable drum with an axial linear slot or gap therein which may be supported on and rotated about an elongated body such as a pipe by casters carried by the drum and engaging the elongated body to support the drum concentrically thereabout. An outwardly projecting flange encircles the drum with a gap therein coincident with the gap in the drum. The drum is rotated by a pair of drive gears powered by synchronous motors and placed circumferentially apart by an arcuate distance greater than the arcuate length of the gap in the flange.

Abstract: Steel pipe is provided with protective coating by first applying a corrosion protective coating such as fused powdered epoxy resin or heat activated adhesive or butyl-based pressure-sensitive adhesive adhered to the pipe, then extruding or coextruding an outer polyolefin layer directly onto the corrosion protective coating. The coextrusion step may include an outer layer of high density polyethylene and an inner adherent layer of low density polyethylene, or an outer layer of polyethylene or polypropylene and an inner layer of a copolymer of ethylene or propylene and acrylic acid.

Abstract: The disclosure relates to a construction for a wrapped elongated structure, a method of manufacturing an apparatus to manufacture the wrapped elongated structure. The wrapped elongated structure has an elongated core. An adhesive tape having one adhesive surface is applied to the surface of the core along the length thereof with the adhesive surface facing away from the core. Tape wrapping is spirally wrapped around the core and the applied adhesive tape in order that each turn of the tape wrapping contacts the adhesive surface of the adhesive tape. The adhesive tape secures the tape wrapping in its spiral form with respect to the elongated core. The wrapped elongated structure may also structure may also included an elongated core, a first tape wrapping spirally wrapped around the core, an adhesive tape having two adhesive surfaces applied on the spiral first tape wrapping, and a second tape wrapping spirally wrapped around the adhesive tape.

Abstract: Pipe wrapping and coating apparatus, wherein one or more rolls of tape for wrapping the pipe are mounted on spindles supported by pivotal frames whereby the frames and the rolls of tape carried thereby pivotally self-adjust angularly so that the tape is wrapped flatly onto the pipe automatically and the overlap of adjacent tape wraps is made uniform automatically. The apparatus is supported by an adjustable wheeled carrier adapted to support the apparatus weight when the apparatus is mounted on pipes of diverse sizes. The apparatus includes a reservoir for dispensing coating material prior to wrapping, and includes novel coating application means.

Abstract: A portable pipe joint wrapping machine is provided wherein a pipe enveloping frame which is rotatably supported concentrically with respect to a pipe comprises a reel assembly that is mounted on the frame and that is adapted to receive and rotatably support a roll of wrapping material of the cold wrap type that has a separator sheet between adjoining plies of the roll in position for feeding wrapping material from the roll to the pipe to be wrapped about the pipe while rotating the frame about the pipe, a sheet receiving assembly being provided powered by a wheel that is in frictional contact with the pipe and that is rotated when said frame is rotated about the pipe whereby the separator sheet is received by said sheet receiving assembly as it is stripped from the wrapping material during the rotation of the frame about the pipe with concomitant application of the wrapping material to the pipe.

Abstract: Pipe wrapping apparatus of the so-called hand-wrapping type, having a rotating ring structure which carries spindle apparatuses, each carrying a roll of pipe wrapping tape. The apparatus includes take up spindles for accumulation of the backing stripped from tapes which have backing, and includes brake devices for controlling the tension at which the tape is wound onto the pipe. While the apparatus is of the so-called hand-wrapping type, it may be power driven. The apparatus also provides for applying a coat of primer or other precoating material onto the pipe prior to the application of the tape. A notable feature of the invention is the provision of self-balancing spindles through the use of which the tape is consistently applied to the pipe without wrinkles or other misalignments of the tape and with uniform overlap of courses.

Abstract: Wrapping apparatus for a pipeline joint is disclosed. The preferred and illustrated embodiment incorporates a set of rollers which carry the body of the mechanism around a pipeline at the bare weld. The apparatus carries a roller and the roller dispenses sheet wrapping material. The apparatus has a framework which is somewhat similar to a clamp mechanism, having a throat which enables it to open and close and thereby clamp the mechanism to the pipe. It is adjustable to accomodate pipes of different diameters.

Abstract: Pipe wrapping apparatus, having one or more pipe wrapping tape spindles with each of which is associated a take up spindle onto which tape backing is wound after the backing has been stripped from the tape as the tape is wound onto the pipe.

Abstract: A method and apparatus for forming flanges of fiberglass reinforced plastic on a tubular member, the method including the steps of soaking at least one fiberglass strand which is directed to a rotating tubular member whereinafter such strand is wound and laterally distributed about the tubular member forming a plurality of layers with such layers being constrained to form an annular flange on the tubular member of a predetermined axial cross sectional width and height.

Abstract: A precision thermoplastic filament winding process for forming into pipe or similar articles by winding strands comprised of semi-hardened thermoplastic material on a rotating mandrel to form a layer thereon.Single or multiple component, unreinforced and/or continuously reinforced filament wound cylindrical products are continuously produced by winding, at least an inner layer of thermoplastic material upon a rotating cooling mandrel which reciprocates axially in timed relation with moving guiding means and a rotary stripping means.Timing sequence provides a dwell relationship between the cooling mandrel and the hot semi-molten applied material so that at least the inner surface of the freshly applied material is rendered non-sticking and strong enough to enable it to be moved along the surface of the mandrel an incremental distance determined by the planned sequence and pattern required to give the desired specific properties.

Abstract: A machine for wrapping tape on a pipe including an improved means of controlling the tension on the tape, the machine having a bracket supported for rotation around the pipe and axial advancement along the pipe, a spindle rotatably supported to the bracket, tape to be wrapped about the pipe being placed in the form of a roll on the spindle, a brake means affixed to the spindle, a brake shoe supported to the bracket arranged to contact the brake member to impart variable frictional force thereagainst, a follower arm having the inner end pivotally supported to the bracket and the outer end in engagement with the external periphery of the roll of tape mounted on the spindle, and means actuated by the follower arm of increasing the frictional contact of the brake shoe with the brake member in proportion to the diameter of the roll of tape on the spindle.

Abstract: A pipe coating apparatus which incorporates a mechanism for placing weight material, typically concrete slurry, on a pipe where the weight material is delivered on top of a conveyor belt. The apparatus includes a vertically aligned housing which receives the weight material and has a slot of adjustable height on one side. A conveyor belt extends between two rollers. One roller is located to the side of the pipe. The second roller is located to the side of the first roller and preferably parallel to and immediately below the axis of the pipe. The pipe is supported by the apparatus and the weight material, concrete in a tacky state, travels with reinforcing mesh along the top of the conveyor belt as it travels endlessly around the two rollers from the slot where the weight material is metered on top of the conveyor and wraps in helical fashion about the pipe as it rotates and moves lengthwise. A coating of specified thickness is applied by the apparatus.

Abstract: The assembly is composed of a framework having a longitudinal passage for receipt of a pipe to be wrapped and a number of crawler wheels which contact the outer wall of the pipe and which cause the framework to move longitudinally relative to the pipe. The assembly also includes brushes and wrapping assemblies mounted to rings which circumscribe the pipe. Rotation of the rings causes the brushes to scour the pipe outer wall and tape to unwind from the wrapping assembly onto the pipe. Hydraulic motors are provided on the assembly for powering the crawler wheels, brushes and wrapping assemblies. The hydraulic motors are activated by hydraulic fluid pressurized by pumps located remote from the assembly.

Abstract: A device for wrapping sheet, such as a foam panel, about a tubularly shaped object article, such as pipe sections of a pipeline. The device engages the substantially flat sheet and cams it about the curved pipe body circumference by pivoting yokes so as to cause the sheet to be wrapped about the pipe body. After the sheet is wrapped about the pipe body its free edges are fastened together so that the device can be removed.

Abstract: A process is provided for bonding otherwise incompatible resin systems to form laminated resinous articles. A first resin layer is coated with a solvated coating which forms a surface solution with the surface of the first layer. Thereafter, a second resin layer is bonded to the coating. The coating contains a butadiene resin, a portion of the resin used in the second layer, and curing agent for the resin. The process is particularly adapted to bonding polyvinyl chloride pipe cores to epoxy-impregnated glass fiber overwrap to form improved laminated plastic pipe.

Abstract: A method and apparatus is provided for continuously making fiber reinforced plastic pipe in which a conveyor tube is formed on an axially fixed hollow rotatable mandrel. A plurality of bands of resin impregnated fiber elements are wound on the conveyor tube as it advances to provide the pipe assembly. The terminal end of the generated pipe assembly is sealed with a plug. A fluid under pressure is fed through the hollow mandrel and out the forward end of the mandrel into a chamber formed by the generated pipe assembly, the plug, and a fluid sealing means within the pipe assembly being generated, thereby causing the pipe assembly to advance.

Abstract: A process is provided for bonding otherwise incompatible resin systems to form laminated resinous articles. A first resin layer is coated with a solvated coating which forms a surface solution with the surface of the first layer. Thereafter, a second resin layer is bonded to the coating. The coating contains a butadiene resin, a portion of the resin used in the second layer, and curing agent for the resin. The process is particularly adapted to bonding polyvinyl chloride pipe cores to epoxy-impregnated glass fiber overwrap to form improved laminated plastic pipe.

Abstract: Pipe wrapping apparatus, having one or more pipe wrapping tape spindles with each of which is associated a take up spindle onto which tape backing is wound after the backing has been stripped from the tape as the tape is wound onto the pipe.