Abstract: Systems and methods for reinforcing an existing pipeline. In some embodiments, the methods include positioning a pipeline wrapping apparatus on the existing pipeline, wherein the pipeline wrapping apparatus comprises a winding head, feeding a strip of material through the winding head, attaching an end of the strip of material to the existing pipeline, and helically wrapping the strip around the existing pipeline by rotating the winding head and axially translating the winding head relative to the existing pipeline.

Abstract: A bat is created using efficient and automated techniques to apply layers of composite materials onto a mandrel. The system includes a plurality of rotating wrapping mechanisms binding stages. Each wrapping mechanism rotates along a central axis while a mandrel is driven through the axis. The rotational motion allows each wrapping mechanism to wrap one or more material strips along the outer surface of the mandrel. Between each wrapping layer, a binding material such as fusible thread may be applied to fuse wrapping layers together. The wrapping may be performed for the bat barrel and bat handle. Each mandrel may form two bats, and multiple mandrels can be connected together to maximize wrapping efficiency. The wrapped mandrels are separated into bat units, a resin transfer molding is performed, and the bats are completed.

Abstract: A permeable material compacting method includes, feeding permeable material between at least one set of rollers, decreasing a thickness of the permeable material, and wrapping the permeable material around a mandrel in a helical fashion.

Abstract: Described are methods of making a paint roller using a composite cover material made from a compound of polypropylene and calcium carbonate having between 5% and 50% calcium carbonate by weight. One or various compounds may be used to form portions of one or multiple components that make up the paint roller, including, for example, the thermoplastic strips, adhesives and/or the backing of a composite cover material. The materials can be assembled in a continuous manufacturing process. Also described are methods of making a paint roller using an adhesive made from a compound of polypropylene and calcium carbonate having between 5% and 66% calcium carbonate by weight, and methods of making a paint roller using preformed strips or core material made from a compound of polypropylene and calcium carbonate having between 5% and 66% calcium carbonate by weight.

Abstract: A permeable material compacting method includes, feeding permeable material between at least one set of rollers, decreasing a thickness of the permeable material, and wrapping the permeable material around a mandrel in a helical fashion.

Abstract: Described are methods of making a paint roller using an adhesive made from a compound of polypropylene and calcium carbonate having between 5% and 66% calcium carbonate by weight. Described are methods of making a paint roller using preformed strips or core material made from a compound of polypropylene and calcium carbonate having between 5% and 66% calcium carbonate by weight. Described are methods of making a paint roller using a composite cover material made from a compound of polypropylene and calcium carbonate having between 5% and 50% calcium carbonate by weight. One or various compounds may be used to form portions of one or multiple components that make up the paint roller, including, for example, the thermoplastic strips, adhesives and/or the backing of a composite cover material. The materials can be assembled in a continuous manufacturing process.

Abstract: Described are methods of making a paint roller using an adhesive made from a compound of polypropylene and calcium carbonate having between 5% and 66% calcium carbonate by weight. Described are methods of making a paint roller using preformed strips or core material made from a compound of polypropylene and calcium carbonate having between 5% and 66% calcium carbonate by weight. Described are methods of making a paint roller using a composite cover material made from a compound of polypropylene and calcium carbonate having between 5% and 50% calcium carbonate by weight. One or various compounds may be used to form portions of one or multiple components that make up the paint roller, including, for example, the thermoplastic strips, adhesives and/or the backing of a composite cover material. The materials can be assembled in a continuous manufacturing process.

Abstract: A filament winding apparatus includes a control unit, a rotation mechanism that rotates a mandrel, a hoop winding head that performs hoop-winding, and a helical winding head that performs helical-winding. The hoop winding head includes bobbins that feed fiber bundles to the mandrel and a circulation mechanism that circulates the bobbins around the mandrel. The control unit controls the rotation and circulation mechanisms such that the mandrel is rotated and the bobbins are circulated in the same direction during helical-winding. It is not necessary to cut fiber bundles after hoop-winding, and wasted fiber is not fed during helical-winding, thereby increasing economy and productivity.

Abstract: A filament winding apparatus efficiently performs a helical winding process in which the winding angle of the fiber bundle differs. A helical winding head includes two guide rings, adjacently arranged along an axis center of the mandrel, and guide tubes arranged at equal intervals along a circumferential direction of the guide rings. The guide rings are switchable between a first state in which phase positions of the guide tubes are matched and a second state in which the phase positions of the guide tubes are evenly shifted in the circumferential direction by a phase switching structure. Tube exits of the guide tubes are arranged close in the first state.

Abstract: There is described a machine for the winding of tubular products, preferably with tensioned wires (8), including at least one disc (51-52) assembled to rotate on a base structure (2), a motor (9) adapted to drive the rotation of the disc (51-52, 101-103), a plurality of coils (3) assembled to rotate on supports (4) integral with said disc (51-52) and tensioning means (18, 30-31, 40-42), adapted to maintain the tension of the wires (8) constant during the winding of the tubular product (20). Said machine also includes a plurality of driving motors (5) associated to respective coils (3), adapted to feed the wires (8) and operating means (70) and potentiometers (19), adapted to control the unwinding speed of the wires (8) from the coils (3), which are driven by the motors (5).

Abstract: An arrangement (1) for guiding individual reinforcement filaments (2) onto a carrier (3) has a positioning disc (4) with a plurality of filament guides (9) arranged distributed on a circular ring of the positioning disc (4). The carrier is moveable in the direction of the carrier axis (X). The arrangement also includes a rotationally symmetrical deflecting element (5). The positioning disc (4) and the deflecting element (5) each concentrically surround the carrier (3). The deflecting element (5) is mounted within the positioning disc (4) and aligned axially to the positioning disc (4). The inlet-end peripherally extending inner edge (6) of the deflecting element (5) faces toward the carrier (3) and is curved. The filament guides (9) open directly at the curved inner edge (6).

Abstract: An aircraft part manufacturing device for automated composite lay up includes a mandrel tool having a an interior mandrel surface that conforms to an outside mold line (OML) of a part: to be manufactured. One or more circular rings surround the mandrel and are attached to the mandrel. The circular rings rotate supported by bearings in a bearing cradle so that the mandrel rotates concentrically with the circular rings about an axis of rotation passing through the center of the circular rings. Multiple composite material delivery heads simultaneously deliver material directly to the outside mold line on the interior mandrel surface while the mandrel is rotated. A cantilever supported gantry beam supports the material delivery heads inside the interior mandrel surface. A connecting mechanism connects the material delivery heads to the gantry beam and provides motion of the material delivery heads relative to the interior mandrel surface.

Abstract: An apparatus and method for making a paint roller are disclosed. The apparatus includes a mandrel, a first core material strip feeder, a second core material strip feeder, a fabric cover strip feeder, a first heater, a second heater, a first liquid adhesive applicator and a second liquid adhesive applicator. The first core material strip feeder feeds a first strip of core material about the mandrel. The second core material strip feeder feeds a second strip of core material about the mandrel. The fabric cover strip feeder feeds a strip of fabric cover material about the mandrel and about at least one of the first and second strips of core material. The first and second heaters are actuatable between a first active state in which the first and second heaters apply heat to an outer surface of the first and second strips of core material, respectively, and an inactive state.

Abstract: A method and apparatus for making reusable paint. rollers comprised of a core formed from thermoplastic material. The thermoplastic material is formed into a core about a stationary mandril. An adhesive is then applied to the core whereupon a cover is bonded thereto. In a first embodiment the core is formed by winding a plurality of thermoplastic strips about the mandril. In a second embodiment the core is formed by applying liquefied thermoplastic material to a driven belt which transfers the thermoplastic material to the mandril.

Abstract: A method and apparatus for producing a golf club shaft made of a fiber-reinforced resin which includes the steps of rotating a shaft substrate made of an uncured fiber-reinforced resin on the axis thereof, moving a plurality of creel stands in parallel in the axial direction of the shaft substrate, and feeding out tapes from a plurality of the creel stands and winding and laminating the tapes simultaneously and spirally on the outermost layer of the shaft substrate for integrally molding them while the rotating speed of the shaft substrate and the moving speed of the creel stands are being controlled simultaneously.

Abstract: In order to reduce the weight and cost of LPG pressure-resistant containers, thermo-plastic resin is used in the continuous formation of a hollow container wherein the outer surface of a hollow continuous liner is continuously braided with multiple yarns. The present invention is a system for forming a braided hollow container comprised of a continuous liner forming section 1 which continuously forms the continuous liner 70 for the inner layer 72 of the hollow container in the axial direction through a hollow joining section 71, a braid forming section 2 which uses a braiding machine BR to braid the outside of the continuous liner to form the continuous braided body 73, cutting section 3 which cuts the continuous braided body in the radial direction in the hollow joint section, and a plug welding section 4 which welds a plug 75 to the openings formed by the cutting section; and the pressure-resistant container formed using said system.

Abstract: In the manufacture of a structural member comprising a thermoplastic composite core with an exterior reinforcing layer, the core member is initially extruded in the shape of a profile. The profile is then contacted with reinforcing fiber and resin to form the exterior reinforcing layer. The exterior thermosetting layer is cured to form a reinforcing layer. The structural member is preferably manufactured using a pultrusion method in which a tractor device is used to provide linear movement of the profile from the extrusion head to the exterior coating operation. The fiber-reinforced thermoset is coated on the entirety of the exterior of the profile or is applied only on a portion of the profile requiring reinforcement in a defined load-bearing direction. The preferred thermoplastic core comprises a polymer-fiber composite material.

Abstract: The present invention refers to a method of producing a tubular lining ho in particular for use in sewer reconstruction work, comprising the steps of forming at least one fibrous strip into a curable, resin-impreganted hose. The inner side of the resultant lining hose is provided with a protective foil. It is the object of the present invention to provide a method of producing a tubular lining hose with the aid of which hoses of arbitrary length can be produced in a simple manner. This object is achieved by producing first a foil hose, which forms the protective foil, by helically winding a foil strip onto a winding mandrel, the fibrous strip being then wound onto said foil hose. In addition, the present invention refers to apparatuses for carrying out said method as well as to the lining hose itself.

Abstract: The machine for manufacturing vulcanized-rubber tubes has a pair of heads arranged oppositely with respect to mandrels which rotate two or more tubular cores, supported by supporting elements with fixed rollers on a supporting frame. The tubular cores are contained in a thermally insulated box-like container, wrapped in the tubes to be vulcanized and unloaded by transfer means. The container has heads for supplying electrical power to the cores. Devices are provided for removing the cores from the container. The machine also has a carriage which can move along guides which are parallel to the cores, and a mechanism for wrapping the cores simultaneously with spirals of the materials to be used to manufacture tubes.

Abstract: Disclosed are an apparatus for manufacturing flexible, reinforced ducting, a method for making flexible, reinforced ducting and a flexible, reinforced ducting article of manufacture. A wheel carrying spools of reinforcing string rotates at a rate synchronous to a mandrel preparing a laminated ducting wall to lay down a longitudinal string reinforcement between the layers of the laminated wall.

Abstract: The machine for manufacturing vulcanized-rubber tubes has a pair of heads arranged oppositely with respect to mandrels which rotate two or more tubular cores, supported by supporting elements with fixed rollers on a supporting frame. The tubular cores are contained in a thermally insulated box-like container, wrapped in the tubes to be vulcanized and unloaded by transfer means. The container has heads for supplying electrical power to the cores. Devices are provided for removing the cores from the container. The machine also has a carriage which can move along guides which are parallel to the cores, and a mechanism for wrapping the cores simultaneously with spirals of the materials to be used to manufacture tubes.

Abstract: Hydraulic cylinders made of fiber-resin composite materials have a central piston chamber section and bell-shaped internally threaded end sections. Cylinders are made by winding resin coated fibers over a mandril over which externally threaded sleeves are slipped and spaced apart so as to define the end sections. After curing the resin, the winding is cut in the areas of the sleeves to separate the cylinders. An expendable strip is wound onto the sleeves and in the cutting operation is cut into. A bearing, a seal cavity and an enlarged inside diameter at a piston rod end of the cylinder may also be provided using a method of the invention, with the cylinders being cut apart between the ends of sleeves and between the other ends of the cylinders.

Abstract: A self propelled vehicle (14) has rollers (20, 22) supporting the vehicle for movement. A ring (44) is mounted for rotation and has rolls (54) of wrapping material (55) thereon for wrapping the pipeline (10). A plurality of discharge nozzles (82) spaced about the pipeline (10) forwardly of the rolls (54) of wrapping material (55) spray a liquid coating material in streams (86) impacting adjacent wrapped and unwrapped portions of the pipeline 10 as shown in FIG. 9. The wrapping material (55) is porous and the coating material permeates and saturates the wrapping material from both the inner and outer surfaces of the wrapping material (55). Fabric-type wipers (81) rearwardly of the rolls (54) of wrapping material (55) smooth and even the outer surface of the wrapping material and upon curing of the coating material, such as an epoxy resin, a hard outer protective liner or covering is formed including the wrapping material.A separate embodiment in FIGS.

Abstract: A payguide mounting bracket assembly is connected to a support stand, and a spool is connected to the payguide mounting bracket assembly to have a fiber optic coil formed thereon. A pair of payguide assemblies are demountably coupled to the payguide mounting bracket assembly. A robotic manipulator assembly is configured to decouple a selected one of the first and second payguide assemblies from the payguide mounting bracket assembly and move the selected payguide assembly to a location adjacent the spool such that a layer of optical fiber is paid out to the spool from the selected payguide assembly as the spool and payguide mounting bracket assembly rotate relative to the selected payguide assembly. The invention also preferably comprises further comprises an epoxy applicator assembly configured to be demountably coupled to the robotic manipulator assembly for movement to a location adjacent the coil for applying epoxy to the coil.

Abstract: A method of manufacturing filament-wound tubes or shafts includes drywinding a plurality of elongate mandrels with the filament, inserting the filament wound mandrels into respective elongate hollow molds of a mold complex, and injecting resin such as epoxy resin under pressure into the hollow molds into intimate contact with the filament. Heat is then supplied to the mold complex to heat the resin to a predetermined temperature and for a predetermined period of time to cure the resin and thereby form the tubes or shafts. The mandrels and tube or shafts are removed from the hollow molds and then the mandrels are removed from the tubes or shafts. Many of these activities are carried out in parallel to increase the manufacturing throughput of the tubes or shafts.

Abstract: A stationary mandrel (1) is wrapped in a separating film (3) at the front, as seen in the draw-off direction (A). A gel coat layer is coated onto the film (3) and partly gelled by means of a heater (12). The gel coat layer is coated with liquid polyester, wrapped in a longitudinally extending glass-fibre fabric (20) in an overlapping manner and wound helically in a glass sliver (21). These layers are hardened by means of a further heater (24,25), so that a structural supporting profile for coating on the following layers is obtained. The mandrel (1) is set off after the further heater (24,25). For coating on the further layers, liquid polyester, a fibre fabric (34) and a helically wound sliver (37) are applied alternately. These layers are fulled and coated with an outer gel coat layer. The polyester is hardened in an oven (50). A grab device (52) draws the section off continuously from the mandrel (1). Finally, the section is cut to length.

Abstract: A method and apparatus for wrapping the liner of a tape, which has been peeled from the backing of a tape, around a pipe or other object in the same operation that the backing is applied. The apparatus includes a frame having at least two spaced apart bars which direct the path of the liner to an offset position which is parallel to and behind the portion of the backing which is currently being applied to the pipe. The liner is then wrapped around the pipe over the backing which has been wrapped around the pipe just in advance of the liner. The liner may also be perforated or otherwise treated before application to the pipe.

Abstract: This invention relates to a process and a machine for manufacturing a tubular piece from at least one web of supple material, the machine comprising a mandrel around which the or each web is capable of being helically wound, and means for driving by friction the or each web wound around the mandrel, parallel to the longitudinal axis of the mandrel. According to the invention, the or each web being constituted by a resistant reinforcement bonded at least on the surface to a polymerizable product, heat regulation means are provided in the zone of said drive means.

Abstract: This invention relates to industrial manufacture of composite tubes in a continuous fashion. The invention utilizes a segmented mandrel which proceeds as a train of endwise joined segments through a composite tube forming machine. Segments are added to and subtracted from the mandrel during manufacture of the tubes.

Abstract: This invention relates to industrial manufacture of composite tubes in a continuous fashion. The invention utilizes a segmented mandrel which proceeds as a train of endwise joined segments through a composite tube forming machine. Segments are added to and subtracted from the mandrel during manufacture of the tubes.

Abstract: A method is described for fabricating long length hose around an internal moving mandrel comprising the steps of forming an inner tube of an elastomeric or thermoplastic material, curing said inner tube, inserting a lubricated mandrel interiorly a portion of said cured tube, applying a first layer of uncured elastomer or thermoplastic tie gum to said cured tube surrounding said mandrel, encircling the layer of uncured tie gum with a reinforcing material under tension, adding multiple layers of uncured elastomer or thermoplastic tie gum and encircling reinforcing material as necessary for the hose strength required, placing an uncured elastomer or thermoplastic tie gum final layer on said reinforcing material, adding an uncured hose covering material layer on top of said tie gum final layer, wrapping under tension a strengthening material onto the hose covering material for consolidation and protection of the hose during vulcanization, moving the mandrel from the portion of the complete hose to the adjacent po

Abstract: An apparatus and method are provided for winding hoop windings onto a cylindrical member which may be a fiberglass tube or a mandrel. Two sequential stations are provided, each of which includes a rotatable drum and a rotatable winding member. Each of these is separately drivable by respective pulleys. The separately driven drum can be wound with filament or filament may be stripped therefrom according to requirement. The associated winding member consists of two funnels between which are positioned a plurality of pulleys, such that the filament can be unwound from the associated drum and applied to the mandrel or tube.

Abstract: In an apparatus for manufacturing reinforced hoses, a reinforced layer forming device is arranged concentric with material efflux port of an outer tube extruder and an inner tube extruder so that inner tube formation, the reinforcing layer formation and the outer tube extruding can be performed continuously and nearly at the same time on a torpedo projected beyond the top end of an inner die (2) of the inner tube extruder (1). In order to obtain the reinforcing layer of uniform spiral structure stably, a spiral device (21) as a reinforcing layer forming device has an inner spinner (25) and an outer spinner (26), each having conical frustum form, and top end portions of the inner and outer spinners are provided with a plurality of thread holes (G1, G2) and inserted in a gap between the intermediate die (12) and the inner die (2), and the inner and outer spinners can be rotated integrally with inner and outer bobbin carriers respectively.

Abstract: A hose or pipe comprising a tubular layer formed by helically winding plastics material and/or rubber around a mandrel reinforced with a high tensile spring steel wire which is formed into a helix around and simultaneously with the winding of the tubular layer by positively driving the wire into engagement with coil-forming means, disposed around the tubular layer, which gives the wire a set and produces a wire helix having an internal diameter approximating the external diameter of the tubular layer, the wire being driven into the coil-forming means at a linear speed substantially equal to the speed of the surface of the helical path around the tubular layer against which the wire coil is to lie.

Abstract: A completely automatic process and apparatus are described for producing multi-layer rubber or plastics tubes reinforced with fabric tapes or metal wires.The apparatus is new both overall and in its individual component units.Specifically, spiral-forming units of new design are described, which operate in series to each apply a different tape material as a spiral on to the metal core which is fed with rectilinear motion, to form a continuous layer thereon. Unwrapping units are also described for automatically removing and rewinding the outer forming tape for the finished tube.

Abstract: Straps or belt loop strips are formed with the apparatus and method of the present invention by folding a strip of fabric about a strip of fusible material, threading the folded, combined strip back and forth between two side-by-side, counter-rotating cylinders so that, in the preferred embodiment, the strip forms a plurality of figure eight patterns over and between the two cylinders, and heating the cylinders to a temperature which is above the melting point of the fusible strip but below the scorching point of the material. The speed at which the cylinders are counter-rotated with respect to each other is chosen, in conjunction with the number of loops of the combined strip over the cylinders, to place the combined strip in contact with the heated surface for a length of time sufficient to accomplish complete fusing.

Abstract: A method and apparatus is provided for continuously fabricating a high pressure hose, or the like, which includes axially advancing interconnected hollow mandrels through a plurality of winding stations wherein all of the hose building components are helically wound upon the advancing mandrels. A heat shrinkable webbing may also be wound upon the advancing mandrels so as to cover the hose components. The mandrels are then separated, and steam is introduced into the interior of the mandrels to effect curing of the hose components, with the shrinkable webbing acting to radially compact the components to remove air pockets and smoothly conform the innermost component against the mandrel. A method and apparatus is also provided for unwinding the shrinkable webbing from the hose after curing, and which includes a drive control system which advances the hose through an unwinding deck while insuring that the webbing being withdrawn from the hose is aligned with its take-up spool.

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

Abstract: This invention is an improved apparatus and method for making fiber optic communication cables by cutting accurate helical grooves in a layer of insulation surrounding the surface of a strength member, and inserting the fiberglass conductors into the grooves with fillers and spacers around and between the glass conductors to protect them from damage. Helically wrapped binders and heat barrier tapes may be wrapped over the assembly with any additional binder threads or tapes as may be necessary to hold the heat barrier in place.

Abstract: Reinforced plastic tapered tubular rod products and the method and apparatus for producing the same. Tapered steel mandrels of desired length and cross-sectional shape are connected in endwise alignment to form a continuously moving mandrel structure. The mandrels each have an enlarged head and a tapered nose at the opposite end thereof so that the nose extends into a recess formed in the enlarged head of the next proceeding mandrel. These mandrels are fed through a multiplicity of winding wheels in which filament containing strands issued from spools on the wheels are helically wound upon the mandrels. The winding wheels are individually programmable so that the geometry of the reinforcement can be varied ply by ply to obtain the desired longitudinal thickness and the desired torsional stiffness in the end product.

Abstract: There is disclosed a method and apparatus for making tubular fiber reinforced thermosetting resin elements having a thermoplastic lining. The technique involves application of a thermoplastic lining layer to an axially moving mandrel surface, application of at least one layer of fiber reinforced thermosetting resin material superimposed upon the lining layer, providing for bonding of thermosetting and thermoplastic layers to each other, and heating the thermosetting resin to effect solidification during axial advancement of the superimposed layers with the moving mandrel surface. Provision is also made for applying a thermoplastic jacket layer superimposed upon the thermosetting layer.

Abstract: In a machine for manufacturing reinforced tubes there are provided individually rotatable members supplying reinforcement threads around the tube.

Abstract: Machine for the continuous manufacture of circular waveguides adapted to convey TE.sub.01 mode electromagnetic waves. The machine comprises a wire winder for winding an insulated metal wire onto a spindle, to provide adjacent turns of the wire winding in peripheral contact with each other a ribbon winder for armoring the wire winding with a ribbon winding and a capstan driver for supporting and centering the spindle and allowing the winding to advance along the spindle. For making the winding fully regular and uniform in spite of variations in the wire diameter, a tensioning device is provided, so that the tension of the wire at the point of winding must be held quite constant. This wire tension at the point of winding depends on the tension of the supplied wire at the winding point of origin and on the reaction of the wound portion, which has already been made.

Abstract: A pile weatherstripping has a continuous length of a resin anchorage base with even lengths of filaments secured to opposite sides of the base along the length of the base and extending away from the base in the same general direction on each side of the base. The filaments are long enough and dense enough to form insulating pile rows extending out of a retainer slot in which the anchorage base has an interference fit. A sheet resin fin preferably extends continuously outward from the base between the filaments on the opposite sides of the base, and such a weatherstripping is preferably made by wrapping a multifilament yarn around a plurality of bases, securing the yarn to opposite sides of the bases, and then slitting to separate each individual weatherstrip.

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

Abstract: Improved apparatus for manufacturing spiral tubes wherein two portions of a spiral tube in the process of covering a mandrel are wound and pressed in opposite directions alternately by means of two belts which are so arranged that they satisfactorily wind and press the spiral tube without causing the mandrel to lean in any direction, and that the two portions wound and pressed by the two belts do not overlap one even when the two portions shift naturally, and a cutting device is so arranged that it cuts the spiral tube easily and smoothly.

Abstract: A pile weatherstripping has a continuous length of a resin anchorage base with even lengths of filaments secured to opposite sides of the base along the length of the base and extending away from the base in the same general direction on each side of the base. The filaments are long enough and dense enough to form insulating pile rows extending out of a retainer slot in which the anchorage base has an interference fit. A sheet resin fin preferably extends continuously outward from the base between the filaments on the opposite sides of the base, and such a weatherstripping is preferably made by wrapping a multifilament yarn around a plurality of bases, securing the yarn to opposite sides of the bases, and then slitting to separate each individual weatherstrip.