Abstract: Device for use in wet removable of asbestos from pipes comprising a trough having means for securing the trough on pipes, and means to allow a poured in aqueous solution to completely immerse said pipes and prevent leakage of said solution from spaces between said pipe and said sealing means.

Abstract: A continuously and synchronously operated plastics coating device for elongated bamboo poles or the like consists of a plastics feeding unit having a plastics injection unit planted in a perpendicular relationship to a molding member. Plastic is injected thereout in a film state through a round fissure so to coat a continuously forward-moving bamboo pole with a film of plastics. The pole is fed through one end of the assembly and moves into the film of plastics so that a continuous coating process is effected thereby.

Abstract: An apparatus for cleaning and spray painting pole structures. The apparatus includes a carriage constructed to be upwardly and downwardly movable along the axis of the pole to be cleaned or painted. Mounted on the carriage is a carousel rotatably secured so as to revolve around the pole as the carriage moves upwardly and downwardly. The carousel may be provided with brushes for cleaning the pole or with a paint sprayer for applying paint. In one embodiment two pairs of rollers are located symmetrically with respect to the sprayer and the poles so that the rollers evenly apply the paint to the pole and simultaneously minimize overspray losses.

Abstract: A roll forming process utilizes as a feedstock hot rolled steel strip (1) and during the roll forming process the surface of the steel strip (1) is cleaned and polished by the combined effects of deformation and frictional contact between the surface of the strip (1) and the mill rollers. The initial deformation step (9) is carried out in the presence of a conventional rolling mill lubricant/coolant and the final rolling stage (10) is carried out in the presence of a detergent composition which serves to remove any residual lubricant and particles of mill scale and at the same time act as a lubricant/coolant for the rolling mill (8) at the final stage (10). The process enables subsequent on-line painting (13) of the roll formed product (12) at high line speeds.

Abstract: Plant is described for cleaning or treating the insides of pipes, tubes and the like. The plant comprises a pipe-receiving station, a cleaning station and means for conveying the pipes, tubes and the like towards and away from the cleaning station in a direction transverse to their axes. The cleaning station includes elongated lance means with spray means at one end and mean for moving the lance means and a pipe, tube or the like axially relative to one another to cause the spray means to traverse the inside of the pipe, tube or the like and spray it with, for example, abrasive material. The inside of the pipe, tube or the like may also be sprayed with treatment liquid or rust-proofing liquid.Two pipes at a time may be treated and the whole plant is preferably so constructed as to be mobile, being constructed of readily assemblable units arranged in a number of standard I.S.O. shipping containers.

Abstract: The present invention is directed to an apparatus for the continuous production of elongate hollow bodies or inner linings for such hollow bodies, from a liquid material wherein the peripheral surface of a mandrel rotating about a horizontal or slightly inclined shaft is covered with a separating film and the liquid material is applied to said separating film and the resulting hollow body is continuously from the mandrel in the axial direction of the shaft while observing the solidification speed of the material, the improvement wherein the separating film is applied to the mandrel in the axial direction of the shaft.

Abstract: Coating apparatus for coating a cable with bitumen which is self-contained except for apparatus for supplying a heated fluid to the coating apparatus. The coating apparatus includes a tank for receiving bitumen and has pipes therein to which heated fluid at a temperature sufficient to melt solid bitumen is supplied by external fluid heating apparatus and in which the heated fluid circulates. The cable passes through the apparatus in a trough to which liquid bitumen is supplied by a rotating cylinder partially immersed in the liquid bitumen and connected, for liquid bitumen delivery, to the trough by a pivotable chute. A tiltable cradle receives solid bitumen and dumps it into the tank where it is melted. A wiper in the form of a tensioned, elongate elastic body is wrapped by at least one turn around the cable where it leaves the coating apparatus and an elastic tab engages the cable adjacent the cable inlet to divert liquid bitumen which may flow toward the inlet.

Abstract: The progressively movable holding device comprises two link plate chains (2, 3) which can be separately tightened and loosened in respect to each other and to the workpiece (1) they hold and which are guided by articulated adjusting members (4) at movable distance from each other, wherein the link plate chains (2, 3) are constructed in a mechanical assembly technique easily adaptable to the dimensions of the workpieces (1) by changing the numbers of link plates (5, 6) and which also allow the circulation on a rail section (26) integrally formed on one of the link plate chains (2, 3) of a bracket-type carriage (10) which can serve both as working platform and as implement carrier, for instance, for sandblast pistols. By means of a control and locking device and energy supply designed according to the task to be performed, the holding device can be reversed progressively and by remote control across its main direction and is also easily adaptable to changes in the contour of the workpiece.

Abstract: An apparatus for cleaning and spray painting pole structures. The apparatus includes a carriage constructed to be upwardly and downwardly movable along the axis of the pole to be cleaned or painted. Mounted on the carriage is a carousel rotatably secured so as to revolve around the pole as the carriage moves upwardly and downwardly. The carousel may be provided with brushes for cleaning the pole or with a paint sprayer for applying paint. In one embodiment two pairs of rollers are located symmetically with respect to the sprayer and the poles so that the rollers evenly apply the paint to the pole and simultaneously minimize overspray losses.

Abstract: A thermosetting resin layer covers the outer peripheral surface of the nipple portion of a joint provided on one end of a connecting pipe. A hose having a reinforcing layer between a single- or double-layer inner tube and an outer tube is inserted over the nipple portion of the joint, and tightened by a caulked sleeve or clamp encircling the hose to form a joint structure. This joint structure provides a satisfactory seal for a long period of time, as its resin layer does not undergo any crystallization, but maintains elasticity.

Abstract: A linear material 20 is once wound on a winding drum 22, and then wound on a winding core 11a by a winding disk 21. The winding disk 21 periodically reverses the direction of rotation. During the winding operation, the linear material is impregnated with a synthetic resin.

Abstract: Apparatus for the application of marks to tubes used for the winding of textiles for the identification of the composition, quality and/or origin of the textiles. Device includes a flighted elevator conveyor adapted to take tubes from the bottom of a container and to transfer them to an inking assembly with marking tips which mark the ends of the tubes. Rotary brushes clean the tube ends prior to marking.

Abstract: A trowel for use in troweling a fluid resin-hardener mixture into the interstices of reinforcing filaments disposed about a rotating pipe-forming mandrel is provided. The trowel is semicircular in cross-section and is biased upwardly against the rotating mandrel as it moves along the length thereof. The trowel has substantially universal movement enabling it to maintain constant contact with the rotating pipe periphery.

Abstract: A method is disclosed for the in situ coating of electrically conductive structures such as a pipe line wherein a reservoir of a water dispersion of an ionic organic resin composition is provided at the section of the pipe or other structure to be coated and a direct current is impressed on the reservoir of resin and the conductive structure of a polarity to cause the resin ions to electrophoretically migrate to the conductive surface of the structure and form an insoluble coating thereon. The process allows coating of areas of the structure beyond the limits initially contacted by the resin composition by virtue of the fact that gas evolved from the water during electrolysis progressively displaces soil surrounding the structure allowing the resin to contact additional conductive surface portions of the structure and thus form a coating thereon.

Abstract: The applicator is annular in configuration, having top and bottom walls formed of elastic material. The central openings through these walls are undersized, so that the walls seal around the string of pipe passing through the openings. The applicator is mounted on the string and is free to move laterally with it. Thus there is provided a free-floating, sealed, annular spray chamber mounted on the string and free to move laterally with it. A ring of nozzles is mounted within the chamber for spraying the string. A pump and conduit supply pressurized chemical to the nozzles. A vacuum pump and conduit suck excess chemical from the chamber for recovery.

Abstract: In certain composite plastic pipe manufacturing operations it is necessary to provide an adhesive coating between the core pipe and the fiber glass reinforced layer, especially if the core pipe is a thermoplastic and the fiber glass reinforced material is a thermoset resin. In the disclosed coating apparatus (2), a coating chamber (4) is provided with seal means (20) at a first wall (14) and seal means (22) and a second wall (16), preferably a second chamber (40) is provided with a similar seal means (44). The coating chamber is maintained in a filled condition with a liquid coating material via a circulating pump (48) and associated reservoirs (34, 36, etc.). Rollers (62, 64) maintain the pipe sections in correct positional relationship with the coating apparatus.

Abstract: A novel method for producing a composite pipe having a desired wall thickness by using an endless steel belt as a mold which moves axially while rotating in the circumferential direction of a mandrel. In this method, a thickness regulating device spaced a predetermined distance from the outside surface of the endless steel belt is used to adjust the wall thickness accurately to the desired value. Examples of the thickness regulating device are a cylinder roll, a taper roll, and a conveyor belt.

Abstract: A method and apparatus for forming an electrically conductive layer on a corrosion-resistant layer which covers a cable. The cable is passed through a powder accumulating tank in which are mixed an electrically conductive powder and binder powder so as to allow the mixed powder to initially adhere to the surface of the cable. The mixed powder is then pressed against the surface of the cable first at a cable outlet of the powder accumulating tank and then with a powder applying device in which an endless powder applying belt or cloth is rotated around the cable at a rotational speed dependent upon the linear speed of the cable. The surface of the cable is then heated to melt the binder powder and cause the electrically conductive powder to yet more firmly adhere to the surface of the cable. The cable is then cooled and wound.

Abstract: This relates to the formation of sausage casings formed of a fibrous tube by penetrating the tube or web with viscose. A specific coating and extrusion die is provided together with a statement of the discovery that where there is laminar flow the penetration of the viscose is not controlled by the orifice size per se, but by the relative application of the viscose with respect to a column of viscose passing through the same orifice at the same rate.

Abstract: A method of and apparatus for impregnating a fabric reinforcement structure with a liquid impregnant especially suited for impregnants which set rapidly under normal conditions. The reinforcement structure is continuously advanced through a column of liquid impregnant to which impregnant is continuously supplied so as to cause the impregnant to move in a direction opposite to that in which the reinforcement structure is advanced.

Abstract: A process for applying a coating of plastic material to a metal tube of finite length having a pretreated surface by applying plastic coating materials on the metal tube in a direction horizontal and perpendicular to its direction of travel, the process being characterized by the following sequence of steps:(a) heating a fixed metal tube to a temperature above the melting point of the plastic material to be employed;(b) causing a mixture of plastic powder and air to pass through the metal tube whereby the plastic material is fritted onto the inside surface of the tube;(c) thereafter rotating the metal tube and applying to the exterior surface thereof in a plurality of stages a plastic material, said plastic material being electrostatically sprayed onto the rotating metal tube; and(d) after each stage of electrostatically applying plastic to the outside surface of the metal tube and applying plastic material to the inside surface thereof, completely melting and smoothing the plastic material.

Abstract: The invention relates to apparatus and a method for producing a coated film in which a cooled polymeric tubular extrudate is coated, reheated and inflated to yield an oriented, coated tubular film. The apparatus includes a coating head comprising a rotatable assembly including a support member [13] providing an orifice [14] through which the tubular extrudate may be fed, a plurality of spreading members [19] spaced-apart around the orifice, mounting means [15] for each of the spreading members operatively associated with the support member and displaceable relative thereto, and means [21] for biasing each of the spreading members into engagement with the tubular extrudate. Liquid coating medium is suitably deposited on the extrudate from a spray assembly, and the coating asembly is rotated around the extrudate thereby spreading and polishing the deposited medium to yield a uniformly coated film.

Abstract: The invention comprises a cage mountable on a pipe line and bearing a carriage movable on the cage around the pipe line. The carriage supports an elongate arm to lie in the longitudinal direction of the pipe and has a jet cleaning head reciprocable along the arm to clean the exterior of the pipe line. The cage has driven rollers thereon to drive the cage along the pipe line; and an indexing mechanism is provided to step the carriage around the pipe line.

Abstract: A method of coating metal pipes externally with a uniform thin coating of a synthetic resin, such as a polyamide, polyethylene or polyvinyl chloride, which comprises heating the pipe to a temperature to enable a frit of discrete particles to bond to a pipe in a chamber through which the pipe is passed and which is charged with a mixture of a gas and the particles. Thereafter the frit is smoothed by heating the pipe to a higher temperature as it leaves the chamber to cause the particles to coalesce.This is a continuation of application Ser. No. 616,314, file 24 Sept. 1975 and now abandoned.

Abstract: Reinforced plastic pipe is made at high rates using a wiper to remove resin from the surface of the rovings after they are applied to a rotating mandrel. The wiper leaves an optimum surface layer of resin on the rovings. For small diameter pipe, production rates are further increased by rotating the mandrel above its first critical speed.

Abstract: A cable cleaning unit comprising a chamber adapted to surround a section of the cable to be cleaned, a plurality of outlets located within the chamber through which jets of high pressure fluid are directed onto the surface of the cable and mechanism for withdrawing fluid from the chamber. A traction unit for moving the cleaning unit along the cable to be cleaned is also disclosed.

Abstract: Method and apparatus for mixing particulate materials, such as sand, gravel, and cement to form a concrete mix, and for mixing water with the concrete mix to form concrete, and for applying the concrete to a structure such as a pipe, wherein a controlled amount of aggregate is placed on a moving belt and leveled to further control its amount, and then a controlled amount of cement is placed upon the leveled aggregate and leveled to further control its amount, and then the materials on the belt are mixed by spiked rollers dipping into the mixture, water being added to form the concrete, and the concrete being impelled against the object by being passed between high speed rollers.

Abstract: Apparatus for applying powdered coating materials to the outer periphery of objects, and particularly tubular objects, and which comprises a support frame structure for receiving the object therethrough and partially surrounding the object in spaced relation thereto, a supply chamber for receiving a supply of new powdered coating materials therein and in communication with fluidizer apparatus for directing the new powder thereto, gun batteries in communication with the fluidizer apparatus for directing the fluidized powder onto the outer periphery of the object simultaneously from opposite sides thereof, filtered chambers for collecting powder overspray and directing any accumulation of overspray into a reclaimed powder reservoir, said reclaimed powder reservoir being in communication with the fluidizer apparatus for adding the reclaimed powder thereto whereby reclaimed powder is directed to the outer periphery of the object.

Abstract: The invention relates to a process and apparatus for applying a covering on heat-sensitive articles by means of a blowpipe. The covering is applied by a sequence of very short spraying or blasting steps separated from one another by comparatively long cooling stages. The article is carried by a continuous moving support member in the form of a circular wheel, the articles being rotatably mounted in lateral rims on the wheel.

Abstract: Metallic tubing is manufactured from galvanized steel strip by forming the strip into tubular shape, welding the edges together and replacing the zinc lost in welding by atomization metallizing the weld zone first with an aluminum alloy containing from more than about 0.30 to about 0.95 weight percent iron and then with zinc.

Abstract: An installation for continuous two-sided enameling of pipes comprises a vertical receiving-and-discharging rotor a working rotor which moves pipes past working stations, and a mechanism for moving the pipes from one rotor to the other.

Abstract: Apparatus usable in combination with means for extruding a waterproof plastic sheath on foam coating on the exterior of pipe, for reducing the diameter of the plastic sheath adjacent the pipe section ends to conform to the beveled end surfaces of the foam coating and adjacent protruding marginal portions of the pipe surface and thereby form a water stop excluding moisture from the foam thus enclosed by the plastic sheath.

Abstract: A method and apparatus of forming a coating of a rubber or a synthetic resin having an even thickness on the external surface of a tubular textile jacket made of fibers woven or knitted in a tubular form, which comprises passing the tubular textile jacket through a bath of a coating liquid such as a latex solution or rubber paste or a synthetic resin, and then curing the liquid coating attached to the external surface of the jacket. The present method is characterized in that an expanding member capable of inflating the tubular jacket to almost a circular shape in its cross-section is packed into the interior space of the tubular textile jacket and maintained in a definite position with respect to the coating liquid, thereby keeping the jacket almost circular in its cross-section at least for a distance from the point where the tubular textile jacket departs from the bath of coating liquid to a point where the coating liquid attached to the external surface of the tubular jacket no longer is fluid.

Abstract: An apparatus for circumnavigating a dispenser about a pipe includes a frame carrying a pair of endless belts locateable on the pipe and carrying the dispenser. The belt carrying frame is hinged to a semi-circular frame, together to encircle the pipe. A locking assembly interconnects the belt carrying and semi-circular frames to secure the frames to the pipe, and a motor on the dispenser carrying frame rotates the endless belts to propel the frames and dispenser around the pipe.

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: Hollow bodies, e.g. pipes, are coated with protective layers of a liquid or pulverulent material by electrostatic spraying and hardening in which the bodies are disposed horizontally and parallel to one another upon a chain conveyor and are automatically displaced transverse to their longitudinal axes. In a first stage the coating is provided on the hollow bodies exclusively of their end regions and in a second stage the coatings are applied to the end regions.

Abstract: A method of and an apparatus for the internal coating of ducts with a synthetic resin, especially long steel pipes or tubes, in which gas-entrained synthetic-resin particles are passed through the tube while the latter is heated progressively by displacing the tube relative to a surrounding induction-heating coil. Thereafter, a gas stream free from particles is used to clear the interior of the tube.

Abstract: A foamable synthetic plastic composition such as a polyurethane is foamed in place around a pipe within a tubular former disposed concentrically about the pipe while the former moves longitudinally along the pipe. Conditions are regulated to form an external skin on the foam. A hot melt glue or similar composition is applied as an outer sealer onto the foam within the tubular former. Preferably a spiral wrapping of polyethylene film or the like is applied while the sealer is still hot and adhesive, and an aluminum jacket may be applied on top of the spiral wrapping.

Abstract: A cable cleaning unit comprising a chamber adapted to surround a section of the cable to be cleaned, a plurality of outlets located within the chamber through which jets of high pressure fluid are directed onto the surface of the cable and mechanism for withdrawing fluid from the chamber.