Abstract: Simulated granite articles manufactured by coating a mold with a gel coat and then a spray composition including a gel coat material and crushed natural granite, crushed synthetic granite and mixtures thereof. Backing material fills the remainder of the mold. Gel coat and crushed synthetic granite may be sprayed directly on the mold, with a modified spray gun being used to efficiently and uniformly spray the granite composition.

Abstract: A method for the fabrication of a composite structure made from a profile plate and concrete. The relatively lightweight steel profile plate is placed at the building site. At the building site the concrete is sprayed on the surface of the profile plate to form the composite structure. The profile plate can be sprayed with concrete, layer by layer, with each layer being allowed to at least partially set between sprayings. Thus, the inherent load-bearing capacity of the structure increases as the layers are applied and the weight of the structure increases.

Abstract: A process for producing a motor vehicle bumper includes the steps of depositing chopped glass fibers (19) and a curable binder (24) to a center section (38) of a preform (11) that is retained on a preform screen (14) by a vacuum draw from a suction fan (15). A ratio of shredded structural reinforced injected molded plastic (23) and glass fiber (19) is sprayed to form end sections (41) and flanges (39) of the preform (11) along with binder (24). The preform (11) is then cured on the screen (14).

Abstract: A process for the manufacture of a hot-melt, pressure-sensitive adhesive substance with surfces that are not sticky or self-adhesive, which includes casting such a substance in a mold that has been previously coated with a protective web created by spinning a hot-melt, non-pressure-sensitive adhesive and of protecting the surface of the casting with a similar web. For this purpose, fiberization nozzles are advantageously employed. These protective webs are very resistant and, since they participate in the solidity of the block, they make possible the flexible packaging of adhesives with a low mass mechanical strength.

Abstract: A method for three-dimensionally shaping cover materials such as woven or knitted fabrics, vinyl, leather, and the like is performed by providing a cover material (18) and a layer of foamable liquid reaction mixture such as polyurethane which changes from liquid to a viscous state (16') at the beginning of the gas generating reaction, compressing the combined cover material and the foamed layer in a mold (21,22) having surface configurations corresponding to desired final three-dimensional shapes with the compression being performed when the foam layer has substantially completed rising, but before substantial curing thereof takes place, and then allowing the foamed layer bonded to the cover material to proceed in curing reaction. The three-dimensional cover material shaping is performed by this method without external heat or high pressure so that the cover material can retain its original appearance and high quality.

Abstract: A novel cementitious composition based on calcium aluminate and suitable for use in molds is provided. The composition comprises a calcium aluminate powder base, at least one particulate inorganic filler, a latex binding agent chemically compatible with said calcium aluminate powder, at least one dispersing agent, an initiator which initiates the binding of said calcium aluminate powder to said inorganic filler at pH values between 6.5 and 8.0, at least one surface hardness agent comprising an alkyl-aryl sulfonate compound or salt thereof or an aryl sulfonate compound or salt thereof, a polymer salt surface gloss agent, and at least one metal or non-metal oxide wetting agent. A process for producing the composition and a process of applying the composition to form it into a desired shape are also provided.

Abstract: An impeller as used in a projecting construction apparatus for a concave section of a molten-metal-discharging hole is supported on a rotating shaft for redirecting flow of impinging projection material. The impeller includes a plurality of vanes which are attached to the rotating shaft with a specified twisting angle relative to the rotating shaft. A material supplying pipe is directed upon the plurality of vanes, so that, upon impingement of the projection material upon the plurality of vanes, the projection material is projected outwardly and in a direction nearly opposite to the predetermined direction of impingement of the projection material supplied through the material-supplying pipe.

Abstract: A free-form, three-dimensional, solid-phase object (30) is produced from droplets (24) of liquid-phase material having appreciable surface tension and well-defined solidification properties. The liquid-phase material is ejected from an ejection head (20) in discrete droplets onto a substrate (98). The temperature, frequency, size, and trajectory of the droplets and the relative speed of motion between the substrate and the ejection head are adjusted to compensate for the physical properties of the liquid-phase material and the heat dissipation characteristics of the growing object to form a desired object (212).

Abstract: An improved method for lining a section of pipe with a cement mortar. After a wet cement mortar has been applied to a cleaned interior surface of a pipe, carbon dioxide is introduced into the freshly lined section of the pipe in such quantity that a crust of calcium carbonate will be formed on the surface of the wet cement mortar lining as the carbon dioxide reacts with calcium compounds of the wet cement mortar in a relatively short period of time. This crust is provided to tolerate a low-velocity flow of water to protect the underlying mortar from scouring until the normal hardening of the underlying mortar through hydration can take place so as to substantially reduce the out-of-service time of the section of pipe which is being lined.

Abstract: In ceramic welding processes, oxidising gas and a mixture of refractory and fuel powders are projected against a surface and the fuel is burnt to generate sufficient heat that the refractory powder becomes at least partially melted or softened and a cohesive refractory mass is progressively built up against that surface. In order to reduce any tendency for the weld mass to include a low-grade refractory phase and thus promote the refractoriness of that weld mass, the fuel powder is present in a proportion of not more than 15% by weight of the total mixture and includes at least two metals selected from aluminium, magnesium, chromium and zirconium, and in that at least the major part by weight of the refractory powder consists of one or more of magnesia, alumina and chromic oxide, and in that the molar proportions of silica and calcium oxide present in the refractory powder (if any) satisfy the following expression: molar concentration of SiO.sub.2 in % .ltoreq.0.

Abstract: A rigid three-dimensional preform is made by moving a plurality of webs of fibrous reinforcement material superposed and coplanar to a cutter, the webs being coated with an electromagnetic energy-curable binder and pressed together. Prior to cutting a blank in a two-dimensional development of the three-dimensional preform from the webs, the webs are tacked together at spaced local zones by locally curing the binder at those zones by locally applying the appropriate electromagnetic radiation (microwave, ultraviolet, electron) so that the webs travel as one to the cutter. After cutting of the blank, the blank is loaded into a mold to replicate the three-dimensional shape of the preform and the remainder of the binder is cured in the mold by the application of the appropriate electromagnetic radiation.

Abstract: A directed fiber, directed energy process provides both a method and an apparatus for making structural preforms. Fibrous reinforcement material is chopped into short lengths of fiber and propelled toward a perforate mold part. During propulsion and/or after deposition on the perforate mold part the fibers are sprayed with an electromagnetic radiation-curable binder. The binder-carrying fibers are held on the perforate mold part by a flow of air in that the perforate mold part is rotatably mounted in a plenum which provides an air flow therethrough. Rotation of the perforate mold part and scanning action of the fiber and binder propelling mechanisms effects even and complete coverage of the perforate mold part. After a mat of the chopped fibers has been applied to the perforate mold part, a conforming second mold part closes the mold and presses the fibers to replicate the shape of the three-dimensional rigid perform.

Abstract: Method of producing a paint or other plastic resinous material or product which on application to a surface imparts the surface with a tanned skin or leather-like appearance. The method includes incorporating into a paint or a plastic resin fluid a granular non-flocculating resin-plastic-compatible leather powder having a specific gravity of about 0.38 to about 0.5 g/cc. The leather powder is produced from tanned skin and/or leather chips and/or strips which have been steam heated a period of time sufficient to permit the chips and/or strips to swell and simultaneously cause the naturally occurring twisted and tangled collagen fibers therein to shrinkk and to automatically loosen and become less twisted and less tangled which upon pulverization produces a powder including relatively smooth granules having lubricity and relatively non-fibrous.

Abstract: Process for manufacturing walls from earth and sand mortars includes making a mortar mixture containing a dry aggregate mass of between 15 and 50% by mass of earth and between 85% to 50% by mass of sand, bonding materials in a mass of at most 10% of the dry aggregate mass, and water in a mass of at most 22% of the total dry mass of earth, sand and bonding materials, stirring the mixture continuously and transferring while stirring the mixture by force into an inlet of a pump, and pumping the mixture from the pump and projecting the mixture within a framework against a vertical projection support and allowing the mixture to set.

Abstract: A method of repairing an eroded refractory wall pierced by one or more openings using a ceramic welding technique. A member of shape substantially complementary to the desired shape of the repaired opening is placed into each opening so that the member projects from the refractory wall by an extent at least equal to the local depth of erosion. Such complementarily-shaped member is so composed that it is adapted to withstand ceramic welding temperatures. A desired refractory repair mass is built up, by ceramic welding, adherent to the eroded wall and surrounding the complementarily-shaped members(s) while leaving its end or their ends exposed, and the complementarily-shaped member(s) is or are thereafter removed from the repaired openings(s). Such complementarily-shaped member may, for example, be of refractory carbon or of steel, such as stainless steel. Such a steel member may be tubular for the circulation of coolant.

Abstract: A method for forming a substantially continuous filament of a thermoplastic work material and for imparting a swirling motion thereto comprises a body member which has a work material supply passage and a gas supply passage formed therein. An outlet nozzle section connects to the body member and has a substantially conically tapered shape. The nozzle section has a nozzle extrusion passage formed therein in communication with the work material supply passage. A housing member operably connects to the body member to delimit a substantially annular gas transfer zone in fluid communication with the gas supply passage and to delimit a substantially annular gas outlet passage around the nozzle section. The housing member includes an exit section having inner wall surfaces which substantially parallel the conically tapered shape of the nozzle section. The inner wall surfaces are in a selected spaced relation from the nozzle section to define the gas outlet passage.

Abstract: A method is disclosed of making in a mould cavity objects having an outer wall from a micro-cellular or non-cellular elastomer (7) and a core consisting at least partly of a synthetic foam (9), including the following steps: in a first step, a layer (7) of the elastomer is applied by spraying onto the surface (1) defining the mould cavity, and then, in a second step, before the elastomer is completely cured, a reaction mixture for obtaining a synthetic foam (9) is injected in the thus by the formed elastomer layer (7) defined space (8) of the mould cavity and wherein, in a third step, after the synthetic foam (9) has been cured substantially completely and forms a whole with the elastomer layer (7), the thus obtained object is demoulded.

Abstract: A thermofusible autoadhesive shape having nonadherent exterior surfaces consisting essentially of a thermofusible autoadhesive interior and an adherent exterior sheath of a compatible nonautoadhesive thermofusible material covering the entire outer surface of said thermofusible autoadhesive interior and the process of making such shape.

Abstract: Dry cementitious compositions and packages and methods for their application. The dry compositions do not have to be mixed with water but instead are poured, sprayed or troweled onto a substrate which contains water in an amount in excess of that necessary for the hydration of the cementitious materials. These compositions can be applied by layering, dropping through a conduit, or preferably, merely dropped into the water.

Abstract: Pre-formed millwork article for attachment to a building wherein the article has a core composed of a rigid filler material, such as an expandable polystyrene, a body portion composed of a rigid foamed material, such as polyurethane, and an exterior coating layer. The body has an inner surface which is adjacent to the core and an outer surface. The exterior coating layer is adjacent to the outer surface of the body. The coating layer can be a paint. The method for manufacturing the pre-formed millwork article consists of: (a) spraying an exterior coating layer in a mold; (b) heating the coating layer and the mold in order to cure the coating layer; (c) pouring a foamable material in the mold over the cured coating layer; (d) placing a filler material into the mold over the foamable material; (e) alllowing the foamed material to foam and harden; and (f) removing the article from the mold.

Abstract: A vascular patch for closing an incision in a blood vessel includes a base layer of expanded polytetrafluoroethylene (PTFE) having an outer coating of an elastomeric, biocompatible material such as polyurethane to minimize suture hole bleeding. Suture guidelines are formed upon the ablumenal side of the PTFE base layer prior to application of the elastomeric coating to facilitate proper and consistent placement of sutures. A colorant is added to the elastomeric coating to identify the ablumenal side of the vascular patch. The vascular patch is made by mounting an expanded PTFE tube upon a mandrel and applying a water based PTFE ink as a helical stripe about the outer surface of the PTFE tube to form the suture guidelines. The striped PTFE tube is then dip-coated or spray-coated with the elastomeric coating to which the colorant has been added. The PTFE tube is slit to form a flat sheet from which vascular patches are cut.

Abstract: A centrifugal molding method which can smooth the inner surface of the resin concrete layer of a resin concrete pipe or of a composite pipe having a resin concrete layer even without using any special sand conditioning mechanism and which is high in productivity includes producing a composite pipe having a resin concrete layer or producing a resin concrete pipe by moving an arm member of a pipe material feeding device forward and backward axially through a pipe forming outer mold rotating about an axis thereof and by feeding pipe materials from a discharge port formed in a front end of the arm member. The resin concrete layer is formed by feeding resin and aggregate to a mixing portion provided at the front end of the arm member through separate feed routes, mixing the two in the mixing portion and discharging the resulting mixed resin concrete material from the discharge port.

Abstract: A panel having a finish face, a substrate and a lamina of moulded polyurethane between the two is formed in a single closable die having two portions, the first stage of the operation being to spray a release agent onto a face forming surface of one die portion, then spray an aliphatic polyurethane colored film onto the release agent, spray an elastomer polyurethane over that film and allow the elastomer to at least partially set, lay a sheet of reinforcing fibre which can for example be a continuous filament glass over the at least partially set elastomer, dispense the liquid ingredients of a rigid foam polyurethane over the glass, close to the mould, and remove the product after setting.

Abstract: A novel process for rapid solidification of ceramic melts combines certain features of cooling by atomization and by contact with chilling surfaces. The material to be solidified is divided into fine liquid droplets that are propelled by a rapid flow of gas toward a rapidly moving chill surface, striking the surface with sufficient velocity to flatten each drop into a flat flake like shape. Apparatus for the process is also disclosed. The process is particularly applicable to making very fine grained, or even amorphous, ceramic materials that can be powdered and then sintered into strong, tough ceramic structures.

Abstract: A substrate is initially moulded from a cross-linked polymeric material reinforced with glass fibres, the substrate is subsequently placed in a die in which a facing layer is first moulded, and on that layer are injected the ingredients for a foam padding material which adhere the substrate to the facing layer. The facing layer is desirably polyurethane, although use can be made of flexible acrylic, polyvinylchloride, and some other polymeric materials.

Abstract: A method for manufacturing decorative features in situ in a base layer of cast plastic material includes the steps of providing a heated mold tool with a selectively heated surface in the form of a desired decorative feature; depositing a covering of thermoplastic material in the recessed surface and heating the recessed surface to partially fuse the thermoplastic material on the recessed surface to form segments of plastic corresponding to the desired decorative feature; dumping excess thermoplastic material from the heated mold tool; thereafter spray coating the mold at the recessed surface to stabilize the location of the partially fused material in the recessed surface; reheating the mold tool to partially remelt the retained stabilized segments and thereafter depositing a base layer of thermoplastic material across the full surface of the mold and reheating the mold to bond the retained stabilized segments to the base layer and cooling and stripping the mold to form a finished plastic shell having a deco

Abstract: A method for forming cementitious material, such as gunite or the like, to a desired cross-sectional profile for an interior structure such as a swimming pool, skateboard bowl or the like. A forming assembly includes a cutting edge, which is formed so as to correspond to the final desired profile of the structure. The forming assembly is mounted so as to be pivotable about a pivot axis substantially coincident with the center of the structure being formed. In this manner, when the cementitious material is applied to the side walls and bottom of the excavation to a depth slightly greater than that as finally desired, and the forming assembly pivoted 360.degree. about its pivot axis, the final desired cross-sectional profile of the structure is attained due to the action of the forming assembly striking off the excess material applied to the excavation.

Abstract: A method for producing elastomer skins as lining material for plastic molded articles, such as automobile dashboards, in which a parting agent and a polyurethane system are introduced into a preform (3) taken from a working model (1) forming a manipulable, dimensionally stable elastomer skin (8), which is unmolded after completion of the reaction and finished in a final mold (11) to make a molded article for improving the process of in-mold coating such that UV-resistant elastomer skins are produced easily and absolutely dimensionally accurately, even with undercuts and narrow, deep crevices. A polyurethane paint is provided between the parting agent and the polyurethane system. Prior to the introduction of the polyurethane layer, the preform (3) is at least regionally inverted into a position in which its side facing the spraying tool (2a) is on the outside and has a substantially convex curvature.

Abstract: A method for moulding an article wherein mould parts are adapted to be moved together under vacuum to cause moulding material to be evenly distributed around a reinforcement structure. A finish coating of paint or the like is applied to the article during the moulding process by coating the mould interior and partially curing the coated material before introduction of the moulding material. Coating of the interior of one or both mould parts may be effected to produce articles coated on one or both surfaces. If desired, a plurality of coating and partial curing steps may be employed.

Abstract: A computer controlled concrete injector pump and process for lining pipe comprises a pump chamber having an outlet connected to a spray lance through a first check valve and having first and second inlets, one inlet being connected through a second check valve to a hopper, and the second inlet being connected to an injector tube having a piston moveable therein by a hydraulic cylinder. The hydraulic cylinder is controlled by a programmable logic controller in a control system which has provisions for operator input of lining process parameters. The volume and flow rate of material from the pump may be controlled accurately by controlling the movement of the piston within the injector tube. The valve housing of the second check valve between the chamber and the hopper is split into two portions which are connected by a quick-disconnect coupling. The valve housing may be separated for access to its interior for maintenance and cleaning.

Abstract: A method of constructing a miniature balloon (96) for use as a catheter in blood vessels (10) involves spraying aerosolized particles to form successive coats of a highly diluted silicone-rubber solution (42) onto a Teflon coated mandril (48,50) having a roughened surface. Each coat is allowed to cure somewhat prior to applying a further coat. The silicone-rubber solution comprises 5% silicone and 95% solvent. The balloon products of this process have thinner, more delicate thickness-controlled walls than balloons made by the prior-art process of dipping.

Abstract: A slush molding method including the steps of preparing a mold with a groove provided on the entire periphery of the opening portion thereof, engaging a heating medium guard frame with the groove, charging a resin material into the mold, heating the mold into the heating medium which is contained in a fluidized-bed oven and fluidized by air so as to melt the resin and cause it to adhere to the molding surface and removing the heating medium guard frame to discharge the surplus resin. An apparatus used for the slush molding method is also included.

Abstract: A method of forming a coating useful for forming casting molds including agitating a quantity of polyester resin and admixing into the resin a quantity of aluminum powder, storing the mixture for 12 to 24 hours, introducing a catalyst into the mixture and spraying the mixture onto an object defining a mold cavity of a casting mold. The atomized aluminum powder should have a weight ratio of 10 to 50 percent of the resin and should have a ration of 4 times 200 mesh/ 1 times 400 mesh+2 times 200 mesh/1 times 400 mesh.

Abstract: An underground storage tank installation apparatus and method for installing the same. The apparatus includes a fiberglass vault into which one or more underground storage tanks are secured and buried in a suitable excavation. Structural support members are formed within the walls of the fiberglass vault to provide adequate strength for the walls of the fiberglass vault so that the chances of cave-ins are minimized. Internal and external observation wells are provided, with automatic leak detectors, so that any leakage either inside or outside the fiberglass vault is automatically detectable. The preferred method for installing the fiberglass vault is to excavate a pit of predetermined dimensions and pour a concrete base in the bottom thereof. The sides of the pit are lined with sheetrock panels and a liquified fiberglass mixture is sprayed on to the panels and concrete slab, with vertical support members being secured to the sheetrock panels between subsequent layers of the fiberglass coating.

Abstract: A quartz glass crucible adapted for use in a process for pulling a single crystal semiconductor material having an opaque outer substrate of a quartz glass with a relatively high bubble content and an inner transparent glass layer which is substantially free from bubbles. The crucible is produced while the substrate is supported by a rotating mould by forming an atmosphere of high temperature gas and supplying a metered quantity of powders of quartz to the high temperature gas atmosphere to have the quartz powders molten at least partly and directed toward an inner surface of the substrate to be adhered thereon.

Abstract: A novel process for rapid solidification of ceramic melts combines certain features of cooling by atomization and by contact with chilling surfaces. The material to be solidified is divided into fine liquid dropletes that are propelled by a rapid flow of gas toward a rapidly moving chill surface, striking the surface with sufficient velocity to flatten each drop into a flat flake like shape. Apparatus for the process is also disclosed. The process is particularly applicable to making very fine grained, or even amorphous, ceramic materials that can be powdered and then sintered into strong, tough ceramic structures.

Abstract: A process for producing hollow structures of carbon material having desired shape and properties of carbon by obtaining a carbon paste composition, molding portions of the hollow structure by a method selected from the group consisting of an injection molding method, an extrusion molding method, a casting method or a fluidizing method, bonding the molded portions together using a paste composition, solidifying the bonded portion by precarbonizing, the hollow structures thus provided, and then calcining in an inert gas atmosphere as required. Hollow structures of carbon materials having a rigid bond, excellent impermeability, and complicated shape can be readily accurately and inexpensively produced without working after calcining.

Abstract: A access-hole frame for the construction of a spherical tank made of nonmetal moldable material, the frame having a cylindrical neck, an outwardly extending flange at the top side of the neck, and a collar configured as a segmented sphere to be integrated with the spherical wall of the tank. Bolt holes are drilled around the flange for bolts that hold an access-hole cover to the access-hole frame. A three-piece die provided for making the access-hole frame includes a bottom die piece and two top pieces that are bolted together to form an integral top die piece that fits over the bottom die piece. The access-hole frame is formed in accordance with a manufacturing process by placing the three-piece die in stages upon a rotatable table and spraying the nonmetal moldable material onto the rotating bottom and top die pieces.

Abstract: A method for manufacturing decorative features in situ in a base layer cast plastic material includes the steps of providing a mold tool having a surface thereon which is recessed in the form of a desired decorative feature and includes a sharp break line between the recess and the surrounding mold surface; depositing a covering of thermoplastic material in the recess surface and heating the tool to melt the thermoplastic material on the recess surface to form segments of plastic corresponding to the desired decorative feature; thereafter cooling the covering and stripping it from the mold by separating it at the sharp break line interface between the deposited material on the recessed surface and a thin film membrane formed on the remainder of the mold surface so as to retain segments of material deposited in the recesses of the mold tool; reheating the mold tool recess to partially remelt the retained segments and thereafter depositing a base layer of thermoplastic material across the surface of the mold an

Abstract: A method for fabricating concrete structural elements is shown. According to the method, a structural element, such as a sheet of insulating material reinforced with concrete, is vertically oriented and coated with fresh concrete sprayed by a shotcrete gun. This coating is then smoothed and shaped as required by the given application. The method does not require the use of moulds to cast the structural element, whose surface is therefore visible at all times during the course of manufacture. This allows for the repair of imperfections before the concrete has hardened.

Abstract: Methods for fabricating low dimensionally electroconductive articles comprising cofacially stacking organomacrocycles and as cofacially stacking phthalocyanines, in which a composition comprising a cofacially stacking phthalocyanine in strong Bronsted acid is formed into a desired shape such as a fiber or film, solidified by removal of the solvent, and provided in fractional valence state.

Abstract: Method for preparing a shaped part, from a flexible plastic material, from a particular pattern, which comprises first forming by gun-spraying, a layer (6) plastic material over a shaping surface from a first mould (11) corresponding to an outline distorted along continuous lines, of the visible surface impression (12) of said pattern, and then stripping the layer of plastic material from the mould, laying said layer (6) inside a second mould the shaping surface of which coincides with the shape of the pattern visible surface.

Abstract: A machine for manufacturing a unitary glass fibre reinforced body shell includes a carriage which is movable along the mold and a turntable which is mounted on a carriage for rotation about a first axis extending in the direction of longitudinal movement of the carriage. An arm is slidably mounted on the turntable for radial movement and a dispenser is located on the arm for dispensing glass fibre reinforced resin onto the surface of the mold. A guidance system is provided which interconnects the turret and the slidable arm and is operable to cause the arm to reciprocate with respect to the turret in a radial direction to maintain a substantially constant length of trajectory extending between the dispenser and the wall of the mold. A drive system is provided for rotatably driving the turret about the axis. The carriage is normally stored on a mobile end cap which may be moved from one mold to another and serves to close one end of the mold.

Abstract: A process is disclosed for forming a thermoplastic structure on the exterior surface of the heated mold form. A mold is heated to approximately two times the melting temperature of a thermoplastic material and particulate thermoplastic material then sprinkled onto the exterior surface of the heated mold. An adhesively bondable material may then be added to the semi-molten thermoplastic material structure. The mold is then cooled and the resulting thermoplastic structure removed.An apparatus for practicing the above process comprising a mold form, heating system, and particulate thermoplastic material dispensing system is also disclosed.

Abstract: A reinforced concrete wall, such as a road barrier or barricade, has a monolithic surface ornamentation thereon constituted by pigmented cements and grooves simulating mortar joints. In the horizontally oriented top portions of the wall where the pigmented cements are substantially thicker than the layers of pigmented cements monolithically joined to the vertical oriented portions of the wall so that these portions, which are subject to chipping and the like during handling and use will retain their aesthetically pleasing appearance. In the molding process, ribs on the mold surface which will form the grooves have a retardant applied thereto so that the cement forming the mortar joint will set at a slower rate than the rest of the body of the concrete wall and when removed from the mold can be brushed. When the wall is in the form of a road barrier, the ends are provided with a conical projection and a conical recess, respectively, to provide coupling between adjacent wall units.

Abstract: A method of forming the required body shell includes the steps of dispensing a coating of glass fibre reinforced resin onto the forming surface of a mold while moving the dispenser along successive longitudinally displaced U-shaped paths which traverse the forming surface to form a continuous coating covering the top and side forming walls of the mold cavity. The further step of compacting the coating by applying a compactor to the inner surface of the coating and moving the compactor along the same path as that followed by the dispenser at a point located downstream from the dispenser.

Abstract: A method of lining pipes comprises the steps of laying along the pipe (56) hoses (63) filled with constituent components of a settable resinous lining composition, axially slitting the hoses, conveying the constituent components to a mixing chamber (65), and centrifugally impelling the mixed lining composition against the wall of the pipe (56). A lining apparatus (50) for carrying out the method is advanced along the pipe (56) and comprises delivery tubes (62) with slitting blades (70) at their leading ends which are pushed through the holes (63) and which communicate with a mixing chamber (65) which, in turn, is open to a centrifugal impeller (57) of a lining machine. The slit and emptied hoses (63) may be left in situ in the pipe (56) or removed therefrom in advance of the lining apparatus (50). A trowelling arrangement using a thin-walled, flexible tube (112) of, for example, a cellulose polymer and a conical trowel (112) is employed to smooth the pipe lining.

Abstract: Thin-walled structures of substantially uniform wall thickness are made by rotating a heated mold surface about a horizontal axis and depositing powdered thermoplastic material onto the mold surface at a rate such that the deposited powder melts on contact with the mold surface and adheres thereto. A high degree of uniformity of the wall thickness is ensured by depositing the powder onto a relatively small portion of the overall mold surface and reciprocating the powder deposition means in the direction of the axis of rotation of the mold surface to thereby uniformly cover the entire mold surface.

Abstract: A body manufacturing system for manufacturing bodies for vans, trailers, trucks and the like comprises; a molding station, a glass fibre applicator, a longitudinal guide associated with each mold for guiding the glass fibre applicator along the length of each mold, a transfer device adapted to support the applicator and transport it along said guide path from one mold to another, an insert locating device for inserting side wall, end wall and roof inserts into the molds, an extraction device for extracting the molded body from the mold in which it is formed, a trimming station, a transporter for transporting the molded bodies from the mold in which they are formed to said trimming station, trimming devices in said trimming station for trimming said body to the required proportions and contour, a floor locating system for locating a floor in the upwardly open end of the body located in the trimming station to form a finished body and a righting mechanism for supporting the molded body and operable to turn it r

Abstract: The present invention provides a method and apparatus for the construction of a low-cost building structure through the synergistic composition of material, process, and structural design. In a first embodiment, a specially fashioned balloon, in the shape of a house, is used as a one-sided form, and is sprayed with a building material formulation. The building formulation may include: structural material, reinforcing material such as fibers to eliminate or minimize separate structural reinforcement, a gaseous bubble material (to provide thermal insulation), and other ingredients such as fillers, strengtheners, bulk-formers, accelerators, coloring agents and dryers. The structure can be created rapidly, and the balloon deflated and removed in minimum time, all by a few as 2 men. The low cost of the labor and materials and equipment used according to the present invention result in a more economical method of creating a building than any presently known method.