Abstract: A sprue system for a nozzle-side injection-molding arrangement of an injection-molding machine for introducing a plasticizable and/or plasticized plastics material into an injection-molding tool along a runner, the center axis of which fixes an injection axis, includes a sprue piece which at least partially forms the runner, a tube portion and a flange portion. A fastener assembly for fastening the sprue system to the injection-molding tool and for aligning the sprue piece along the injection axis is included. The sprue piece and the fastener assembly are formed adjustably in relation to one another and the sprue system has an adjuster for setting a distance (A) between the flange portion and the fastener assembly.

Abstract: A core (14) which is typically held in front of the mold (13) is required for producing hollow plastic objects (10). This does not allow for a transverse reinforcement (11) which is formed from a prefabricated reinforcement tube to be pulled over the core (14). A method and device is provided for the core (14) to be held behind the mold (14) when viewed in the production direction (17). In this case, the front end (15) of the core (14), which is located in front of the mold (13), remains free, such that a transverse reinforcement (11) that has been formed from a prefabricated reinforcement tube can be pulled over the free front end (15) of the core (14).

Abstract: A support apparatus and method for providing structural support to a shape memory polymer (SMP) apparatus during fabrication of composite parts. The support apparatus may comprise an adjustable, rigid structural member and a plurality of SMP support components transitionable between a rigid and malleable state and fixed to an outer surface of the rigid structural member. The rigid structural member may extend in at least one cross-sectional dimension toward the SMP apparatus, pressing the SMP support components, in their malleable state, against the SMP apparatus. The SMP support components may thereby conform to a first surface of the SMP apparatus, then return to their rigid state while pressed against the SMP apparatus, thus providing a rigid load path between the SMP apparatus and the rigid structural member. Then composite material may be applied to a second surface of the SMP apparatus, opposite of the first surface.

Abstract: The present teachings provide a modular articulating cement spacer mold for forming a temporary implant comprising a mold first portion, a mold second portion, and a ventilation forming surface feature on an interior surface of at least one of the mold first portion or the mold second portion. The first mold portion and the second mold portion have corresponding interior surfaces that form a cavity therebetween.

Abstract: A flash removing punch pin is provided with a rotating mechanism wherein a flange is formed on an upper end portion on an outer circumference side portion of a cutting edge portion, and a plurality of grooves are formed in the axis center direction to the side of a casting part from the flange. An inner portion is slidably inserted into an inner cover, and the inner portion and a processing portion are moved by a spring cylinder in a direction to be separated from each other. The spring cylinder is compressed when the punch pin is in proximity to the casting part, and then the flange of the punch pin contacts a flange portion of the casting part. When the inner portion slides into the inner cover, the processing portion rotates along the axis with the inner portion.

Abstract: A machine for and method of manufacturing concrete U-wall construction blocks, each having a front wall portion and a pair of stem portions extending from said front wall portion. The method involves providing a system of molding jacket panels, including a core molding assembly having a pair of inside stem jacket panels that are adjustably supportable in a substantially parallel manner during a molding process, and arranged is such a manner that the front wall portion is molded in downwardly facing direction toward a horizontal support surface and completely enclosed in one or more molding jacket panels. Before block molding operations, the thickness of the front wall portion of the U-wall construction block is set by determining the thickness of a front wall surface liner and installing the front wall surface forming liner within the system of molding jacket panels.

Abstract: A gantry mounted fiber placement machine has a creel and a head with a compaction roller for applying fiber to a mold or tool. The fiber placement machine has 6 axes of motion. The machine has a gantry that moves in the X-axis, a horizontal gantry beam that is parallel to the Y-axis, and a creel that moves with the gantry in the X-axis. The machine has a head that moves in the Y-axis parallel to the floor and across the gantry beam, and in the Z-axis perpendicular to the X and Y-axes. The head swivels in the I-axis as it rotates about the X-axis, in the J-axis as it rotates about the Y-axis, and in the K-axis as it rotates about the Z-axis.

Abstract: A structural surface design device for creating a design with finishing surface material on a surface, the device having a base with raised projections on the bottom. Such projections have less of an affinity for the finishing surface material than does the surface on which such finishing surface material is to be applied. A handle extends upward from the base. And, optionally, the cross-sectional shape of the base is the same as the cross sectional shape of a container for the finishing surface material with the dimensions of the container and the base being such that the edge of the base, when the base has been inserted into the container, is sufficiently close to the wall or walls of the container that any finishing surface material in said container will not cure.

Abstract: A mold for manufacturing a composite drive shaft, most of which, except for opposite ends functioning as power transmission parts, has a tubular shape with a circular cross-section similar to that of a general shaft, and the shape of each end of which is changed so as to realize easy removal of the drive shaft from the mold after molding. Further, the present invention provides a composite drive shaft, which is manufactured using the mold and is configured such that, when a connection joint (metal yoke) is assembled with each end of the drive shaft, the drive shaft can be rotated in an integrated state realized by the connection joints. Thus, the composite drive shaft of the present invention can directly transmit power, instead of a mechanical fastening jointing technique or an adhesive bonding jointing technique, thus efficiently transmitting high torque.

Abstract: A thermal insulating liner for a container has a bottom panel, a pair of opposed end panels, a first side panel and an opposed second side panel. A first flap is hinged to the first side panel at a first hinge line and a second flap is hinged to the said second side panel at a second hinge line. The first flap and second flap are sized so that they are moveable between an open position whereat the first flap is spaced from said second flap and a folded position whereat a side margin of the first flap which extends along a side edge of the first flap opposite the first hinge line overlaps with a side margin of the second flap which extends along a side edge of the second flap opposite the second hinge line. Each flap comprises an outer sheet and an inner sheet spaced by a core with an innermost layer of the inner sheet comprising a metal foil layer. Each flap has a first thickness outside its side margin and a second, reduced, thickness, within its side margin.

Abstract: The present teachings provide a modular articulating cement spacer mold for forming a temporary implant comprising a mold first portion; a mold second portion; a hinge region connecting the mold first portion and mold second portion; and a self-securing device to removably secure and separate the mold first portion and the mold second portion. Other modular articulating cement spacer molds are also provided.

Abstract: The invention relates to a combination packaging container (2, 2?) comprising a beaker-shaped inner container (3) with a container jacket (17), a base (18) and a flange (20) projecting out from the container jacket (17) in the region of its open end (19), as well as a sleeve-shaped outer part (4) surrounding the inner container (3) at its container jacket (17) with end regions (11, 12) spaced apart from one another in the direction of a longitudinal axis (9). The inner container (3) is laid against and moulded onto an internal face (10) of the sleeve-shaped outer part (4). The sleeve-shaped outer part (4) is of a single-layered design between its end regions (11, 12) spaced apart from one another in the direction of the longitudinal axis (9). An end face (29) of the outer part (4) lying opposite the flange (20) constitutes a standing surface for the combination packaging container (2, 2?).

Abstract: This invention is related to a moulding device (90; 92; 95; 98; 100; 110) arranged to be positioned inside a tubular member (17). The moulding device (90; 92; 95; 98; 100; 110) comprises a second closing part (1), a shaft (6) loosely connected to the second closing part (1) and able to glide snugly through an opening in a first closing part (7, 8). When inserted into the tubular member (17), the moulding device (90; 92; 95; 98; 100; 110) defines a chamber together with the inner surfaces of thereof. To form a cast, this chamber is filled with moulding material which thereafter cures. To remove the cast and the moulding device (90; 92; 95; 98; 100; 110) from the tubular member, a drawing force is applied to the first closing part (7, 8), which provides a pulling out of the rest of the moulding device (90; 92; 95; 98; 100; 110) and the cast.

Abstract: Devices and methods for making hollow concrete elements are disclosed. A device includes a drum mold having a tubular mould wall. The mould wall has a first and a second end flange each with an inner periphery smaller than the inner periphery of the mould wall at each respective end. The device further includes a compaction roller positionable inside the mould wall. The compaction roller has a profile that defines the interior shape of the concrete element. The compaction roller is supported by a hydraulically height adjustable supporting mechanism that is operable to independently adjust the distance of each end of the compaction roller with respect to the inner periphery of the mould wall.

Abstract: A method of making an open ended hollow concrete element includes arranging a mold about a substantially horizontal roller shaft, the mold having a sleeve-shaped mold wall defining the outer peripheral shape of the concrete element and first and second end rims, each with an inner periphery smaller than the inner periphery of the mold wall at the respective end and defining the end surfaces of the concrete element. The mold is rotatably supported by the roller shaft by abutment at the inner peripheries of the first and second end rims so that the roller shaft upon rotation defines the inner peripheral shape of the concrete elements. The method further includes rotating the shaft to rotate the mold; feeding curable concrete to the rotating mold; stopping the rotation of the mold; and removing the cured concrete element from the mold. The inner perimeter of the mold wall defines an exterior shape of the concrete element that varies along and/or radially to the direction of the rotational axis.

Abstract: A start-up sequence for a continuous process for producing oriented plastic tube is disclosed. A variable diameter extruder (112) is started and is set to extrude a start-up diameter tube (220) which is significantly over the diameter of a pre-expansion tube diameter of the continuous process. The start-up diameter tube (220) is passed to and engaged by a first haul-off tractor (122). The start-up diameter tube (220) proceeds through to and over an upstream plug (128). The large, start-up diameter of the extruded tube (220) at start-up facilitates passage of the leading end of the start-up diameter tube (220) over a deflated, expandable portion (212) or a non-expandable portion (210) of a partly expandable plug (210, 212), depending on the arrangement of the expandable portion (212) and non-expandable portion (210). The tube is then reduced in diameter for the continuous process of diametral expansion and circumferential orientation to occur.

Abstract: A device and a method for the production of multi-layer concrete pipes, particularly two-layer concrete pipes. The device has a first stand, in which a first pressing head that can be driven is mounted, a turntable, on which several mold mantles standing vertically can be pivoted into a stand in cycles, and a first charging system for filling a first concrete mixture into one of the mold mantles. A second pressing head having an outside diameter that is smaller than that of the first pressing head, and a second charging system for filling a second concrete mixture into one of the mold mantles are provided. In this manner, the second concrete mixture can be filled into the mold mantle, by the second charging system and the mixture can be distributed and compacted before the concrete pipe is removed from the mold mantle.

Abstract: The present teachings provide a modular articulating cement spacer mold for forming a temporary implant comprising a mold first portion; a mold second portion; a hinge region connecting the mold first portion and mold second portion; and a self-securing device to removably secure and separate the mold first portion and the mold second portion. Other modular articulating cement spacer molds are also provided.

Abstract: A method and device is disclosed for inserting a flexible, inflatable and electrically heatable bladder conveying and installing a thermally responsive repair material into the interior of a pipe. The device is portable and can be used to repair pipe accessible from only one location.

Abstract: A concrete pipe making machine having a packerhead consisting of a rollerhead and a longbottom in which the rollerhead and longbottom are quickly assembleable and disassembleable as a unit from the packerhead drive means with one connector and brought into final adjustment off the machine, said drive means providing no obstruction to the flow of wet concrete toward the compaction area, the speed ratios between the rollerhead and longbottom being infinitely variable, and easily replaceable protective wear rings for precluding erosive deformation of the permanent parts of the machine due to undesired penetration of wet concrete into the longbottom.

Abstract: The invention concerns a procedure for the production of tubes from concrete mix, whereby the concrete mix is filled into a shaping device, for the purpose of shaping, where it is condensed with a tool. The invention should enable an effective and fast production of concrete tubes with high quality regarding the uniformity of the material characteristics. In such a procedure the concrete mix is condensed in an interspace between two parts of a tool that rotate relative to each other.

Abstract: There is provided a pipe extrusion die that includes a first and second die assembly. The first and second die assembly each include an extrusion head, a nozzle carrying an outer die lip, a hollow mandrel, an inner mandrel carrying an inner die lip, and a layer-forming channel. The layer-forming channel is defined by the space between the nozzle and inner mandrel. The extrusion die includes a space between the nozzle of the second die assembly and the inner mandrel of the first die assembly such that the first and second die assembly do not share a common wall. The space between the inner and outer die lip (die gap) can be individually adjusted and the second die assembly is freely movable relative to the first die assembly. The extrusion die also includes a vacuum cooling mandrel with a single cooling channel and multiple vacuum ports that provide improved vacuum control over the final die product.

Abstract: A pipe paver finishing machine is disclosed for applying and finishing concrete lining onto the interior surface of a lower segment portion of a drainage pipe. The machine includes a chassis member adapted for movement longitudinally along the interior of the drainage pipe and a surfacing unit suspended from the chassis member and adapted for a pendulum-type pivotal movement substantially about the center point of drainage pipe to apply and to finish a concrete liner onto the bottom interior surface of the drainage pipe.

Abstract: An increased efficiency method and apparatus 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 interior 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 protect the underlying mortar from scouring, while tolerating a low-velocity flow of water, 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: A method and apparatus for expanding a replacement thermoplastic pipe installed within an existing conduit is provided. A pipe expansion apparatus having a flexible substantially cylindrical bladder and a relief valve to inflate the bladder to a predetermined gauge pressure and allow fluid to exit the expansion apparatus and fill and pressurize the area behind the apparatus is inserted within the collapsed pipe. Fluid, such as cold water, is introduced into the apparatus to inflate the inflatable section to conform substantially to the interior diameter and configuration of the existing conduit. As the area behind the expander fills with pressurized fluid, the expansion apparatus is pushed forward, thereby pushing and expanding the replacement pipe up against the interior of the existing conduit. Steam is injected ahead of the apparatus to maintain the replacement pipe in a heated flexible condition.

Abstract: The invention relates to a chimney lining device which includes a shell member which telescopically embraces the exterior of a bell member. A shell member of desired dimensions may be used in conjunction with a standard sized bell member for the lining of various sized chimneys. Both the bell member and the selected shell member are formed of one-piece construction enhancing the durability and performance of the chimney lining device. During use, the invention is generally lowered to the bottom of a chimney whereon a masonry mortar compound is deposited within the chimney covering the chimney lining device. The chimney lining device is then activated causing the vibration of the bell member and the shell member. The chimney lining device is then slowly raised within the chimney, which causes a uniform and compacted thickness of masonry mortar compound to be deposited to the interior walls of the chimney.

Abstract: A process for installing a liner in a generally horizontal pipe section includes the steps of: providing a hollow generally cylindrical folded pipe liner having a reduced cross section sized to allow the liner to be slidably drawn into the pipe section from an upstream end to a downstream end; pulling the folded liner through the pipe section leaving end sections of the liner extending from the upstream end and the downstream end of the pipe; snaking a pull wire through the liner; pulling an air hose and a steam hose through the folded liner from the downstream end to the upstream end; providing a floating plug assembly including at least two disk shaped expanders; attaching the steam hose to the floating plug assembly downstream of the disk shaped expanders; attaching the air hose to the floating plug assembly upstream of the disk shaped expanders; inserting the floating plug assembly into the liner at the upstream end; and providing steam to the steam hose and cooling air to the air hose, while pulling the

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 rollout apparatus for rolling trapped air from a resin impregnated fiber mat has two carriage assemblies mounted for reciprocated movement in opposite direction. Each of the carriage assemblies carries depending rollers that engage an impregnated fiberglass mat laid on a mold. The carriage assemblies oscillate simultaneously in opposite directions so that the turning forces generated by the receiprocation cancel each other, thus providing a smooth vibration-free mechanism.

Abstract: To facilitate the repair of short sections of pipe by providing a lining in situ, a repair carrier containing the repair lining is moved into position adjacent the pipe length to be lined, the lining is forced out of the carrier into position in the pipe where it is fixed in position and the carrier is then removed from the pipe leaving the lining in place. A flexible tube forming a part of the carrier is used to initially position the lining in the carrier and then to force the lining out from the carrier and urge it against the interior of the pipe, preferably by eversion.

Abstract: A method of lining a pipe comprises the steps of laying hose means along the bottom of a pipe to be lined, the hose means having been filled with a predetermined quantity of settable lining composition, anchoring the hose means at each end along the bottom of the pipe, advancing a centrifugal lining machine along the length of the hose means, slitting the hose means in front of the advancing centrifugal lining machine to permit egress of the lining composition from the hose means, and delivering the admixed settable composition to a centrifugal impellor of the centrifugal lining machine for application of the settable composition to the pipe wall as the centrifugal lining machine advances along the pipe. The method is characterised by the step of guiding the slit and emptied hose means through an axial bore in the centrifugal lining machine to lie in a flattened condition on the bottom of the lined pipe wall rearwardly of the centrifugal lining machine.

Abstract: A method and apparatus of introducing and joining diaphragms in slotted walls. The slotted inner connecting pipe of one diaphragm is introduced into the slotted outer connecting pipe of another diaphragm. An apparatus for fusing together the two connecting pipes is placed within the interior of the inner pipe and can move through the latter. The apparatus has a heating device for heating and fusing the two connecting pipes together.

Abstract: Apparatus is disclosed for fabricating an internally coated pipeline for transporting corrosive and/or erosive materials in which the pipe sections are joined by welding. The pipe sections are first internally pre-coated to the exclusion of a length at each end that is affected by the heat of welding the sections together. After the weld has been made between adjacent pipe sections, an expansible and retractable mold is positioned in the area of the weld joint to define an injection cavity between the pre-coating ends. A coating material is injected into the cavity. The mold can then be retracted and moved to another weld joint where the process is repeated.

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: An apparatus for lining chimney pipes and the like with cementitious material, and particularly to the improvement in pipe lining apparatus including a conically shaped leading nose providing control switches activated by a nose cap freely positioned thereover, and a gradually rearwardly tapered hollow sectional trailing spreader body adjusted to be circumferentially enlarged by additional expansion panels connected between the separable sections of the spreader body, and a vibrator within the body to exert vibrative force on the body sections to set the cementitious material deposited externally of the apparatus between it and the chimney pipe to be lined thereby.

Abstract: A packerhead concrete pipe making machine having a rotatable packerhead operable to form a concrete pipe in an upright cylindrical mold about a wire cage. The packerhead has a plurality of rollers rotatably mounted on a circular plate operable to pack concrete into a cylindrical shape in the mold. Each roller has an outer sleeve of elastic rubber material. A cylindrical wall secured to the plate supports an annular troweling member operable to finish the inside surface of the concrete pipe.

Abstract: Disclosed is a fiber reinforced thermosetting resin cylindrical shaped product manufacturing apparatus and method using a cylindrical forming die body having open axial ends and rotatable about its longitudinal axis. A cantilever beam body is positionable within the die body so as to extend along the die body longitudinal axis. The cantilever beam supports a suspension stand which is either movable or fixed. The suspension stand includes a reinforcing fiber feeding apparatus, a liquid thermosetting resin feeding apparatus and freely rotatable pressing rollers. A resin hardening agent feeding apparatus can also be included. While the die body is slowly rotating about its longitudinal axis, fiber reinforcing material is fed onto the die body and resin, possibly including a hardening agent, is fed thereto. This mixture is then pressed by the freely rotating rollers as either the suspension stand or the die body itself is axially moved.

Abstract: To relieve stresses in a plastic weld which may weaken the weld and increase its susceptibility to solvent-induced crazing or cracking, forces are applied to the weld zone (the interface between welded parts) after it has cooled to solid condition, but preferably when it is at a higher temperature than the regions of the parts adjacent thereto, which forces are higher than the yield strength of the material at the weld zone and lower than the yield strength of the material in the regions of the parts adjacent to the weld zone. The forces thereby cause yielding or plastic deformation which effectively relieves certain thermally induced stresses in the weld. Tensile stresses in the weld are thereby relieved, to reduce susceptibility of the weld to solvent-induced crazing or cracking.

Abstract: Spin casting is accomplished by spinning a liquid monomer in a rotating concave mold. Centrifugal force provides the concave lens curvature. Insufficient wetting at the edge of the lens mold results in imperfect lenses. Three methods have been found to increase the wetting. (1) Time: If the rotating monomer is allowed to remain in the mold, some improvement in wetting will occur due to liquid creep. Receding contact angles are lower than advancing contact angles. Two methods have been found to provide receding contact angles. (1) A wiper forces the liquid outward to the edge of the mold. (2) High rotational speed will provide sufficient centrifugal force to move the liquid monomer outward to the edge. Reducing the rotational speed will result in a receding contact angle.

Abstract: An automatic machine for the internal fettling of sanitary appliances in general, which comprises a tappet device elastically loaded towards a cam having a profile conforming to the mouth of the bowls of the articles to be fettled, said device controlling the horizontal excursions of a double slide which supports in an overhanging manner, to lie above a surface on which the articles are arranged, a verticle slider provided with a stepwise-rotatable coaxial shaft on which there is lowerly mounted, in an orientation-adjustable manner, a rotating brush arranged for insertion into the bowls in order to make contact with their entire inner surface extension by virtue of the combination of the aforesaid movements.

Abstract: An automatic machine for the fettling of the syphon of sanitary appliances, comprising a vertical flat structure of overall elastically deformable configuration, which tapers downwards in such a manner as to be able to be inserted into the syphons of the articles provided laterally with two fettling sectors arranged to contact the walls of the syphons, and which is supported by an operating head arranged to subject it to vertical reciprocating recitlinear motion and to simultaneous stepwise rotary motion; the operating head is mounted on a vertical slider for its positioning at the required level.

Abstract: A trowel for smoothing mortar coated on the interior wall of a pipe, including an elastic member for receiving pressurized air and inflating to a diameter less than the interior of the pipe. A blade assembly is connected to and extends from the elastic member, and defines an outer circular surface substantially corresponding to the coated interior diameter of the pipe for engaging and smoothing said mortar. The blade assembly is constructed and arranged to accommodate variances in the inner diameter of the pipeline.

Abstract: A centrifugal molding apparatus for manufacturing composite material pipes comprising a rotary mold and operating arm means extensible into and retractable from the rotary mold; the operating arm means having, in sequence from the front end thereof, a press roll portion for uniformalizing the interior of a pipe being molded, a first resin-liquid supply portion, a second resin-liquid supply portion, a chopped-strand supply portion, a third resin-liquid supply portion, a sand smoothing portion for smoothing sand supplied on to resin liquids, a sand supply portion, and a roving supply portion.According to the invention, the operating arm means have various functions, and by causing them to extend into and retract from the rotary mold one or more times it is possible to mold various kinds of composite material pipes efficiently.

Abstract: An apparatus and method for continuously forming tubing by extrusion wherein selected positions of the length of the tubing are irregularly shaped with a formation such as a pipe or tube thread and wherein such forming occurs while the tubing is passing from the extrusion die. The apparatus also includes means for predeterminately cutting the extruding tube to lengths with each length containing a thread-like formation in its wall at either or both ends thereof. As a result the necessity of post operating on the extrusion in a secondary threading operation to form threads at its ends, is eliminated.

Abstract: A frusto-conical trowel apparatus for smoothing mortar or plastic lining material in a pipe or conduit or other such object which has a generally cylindrical inner surface. The trowel body consists of a plurality of laterally overlapping plate members which are mounted onto an inner frame at the small end of the trowel body; such inner frame and it's support bars being enclosed in a conical device to prevent mortar from entering the trowel body; having small rods connecting a spring member to the inner frame while allowing the spring member to reside at the large end of the trowel body and provide pressure against the trowel plate members in order to establish compressibility diametrically of same, creating needed radial troweling pressure.

Abstract: The disclosure is of a method and means for applying a flowable coating material, such as relining, to a tubular stack; e.g. chimney, flue or the like, by means of a distributor moved upwardly into the stack while supplying coating material to an upper surface of the distributor which is configured to cause the material to flow outwardly to the wall to adhere thereto. The apparatus includes selectively added extensions for moving the distributor incrementally through the length of stacks of considerable height, preferably by means of power-operated means; e.g., a fluid-pressure device.

Abstract: A pipe lining apparatus includes a distributor head which throws cement mortar centrifugally against the interior of a pipe, a trowel which smooths the cement mortar and a liquid coating spray applicator which applies a curing control substance to the trowelled lining. The spray applicator comprises an air atomizing device which produces a very fine coating spray and blows it onto the freshly applied mortar lining without disturbing the lining. Also, in one embodiment the coating spray application is mounted to swing laterally with the trowel so as to be maintained centrally in the pipe.

Abstract: Disclosed is an apparatus for applying polyester resin impregnated fabric onto a smooth surface. Fabric is impregnated with polyester resin and pressed onto a flat or curved surface by means of vibrating rolls which may be remotely controlled to conform with the contours of the surface. Vibration of the rolls removes entrained air bubbles and permits complete application of the impregnated fabric in a single pass of the apparatus. The fabric is dispensed, impregnated and applied from a frame which is suspended from an overhead gantry and which may be moved in three dimensions. On the frame are mounted a roll of fabric, an impregnator for impregnating the fabric with resin, and a series of pneumatically vibrated rollers for applying the impregnated fabric. Operation is controlled from a console attached to the frame.

Abstract: The present disclosure relates to a so-called drag trowel which is drawn through a pipe or the like to trowel a layer of mortar or other plastic lining material therein. The trowel is frustoconical, having a small leading end of relatively fixed diameter and a larger trailing end which is adapted to expand and contract in the direction of its diameter. The present disclosure provides a novel means within the trowel for exerting a resilient expansive force thereagainst in a circumferential direction fairly close to the large end of the trowel. The expansion means comprises resilient means extending lengthwise along the inner surfaces of the trowel with means for translating the force of the resilient means to a circumferential expansive force and with means for adjusting the effective force of the resilient means.

Abstract: Apparatus for building underground pipelines by forming a casing in a hole from a forming material which is compacted in the direction from the center of the hole towards its walls. The hole is first filled with the forming material throughout its cross-sectional area and then the material is compacted in the direction towards the walls of the hole. Compaction is effected by a device comprising a rod-shaped body adapted for moving through the hole, the front end of the body being provided with a system of radial ribs.