Abstract: A method of winding fibers on a mandrel, the wound fibers being in tension, includes providing a source of fibers, imposing a torque on the source that resists dispensing the fibers from the source to exert a tension on the fibers, adding ultra-violet sensitive material that is polymerized by exposure to ultra-violet light to a resin matrix, impregnating dispensed fibers with the additive containing resin matrix, rotating a mandrel to wind the impregnated fibers on the mandrel, the rotation of the mandrel acting to overcome the torque on the source and putting the fibers in tension, and in situ, quasi instantaneously polymerizing the additive containing resin matrix on the mandrel by means of exposing the additive containing resin matrix to ultra-violet light for a selected period of time, such polymerization acting to lock in the tension in the fibers at the time of polymerization. A rail gun fabricated by means of the above method is further included.

Abstract: The invention relates to curable compositions substantially comprising A) at least one epoxy resin, and B) at least one curing agent comprising a hetero-poly-cyclic ring system comprising at least two amino groups.

Abstract: Embodiments of the invention relate to a fiber application method and a fiber application machine for producing parts in composite material, such as for the application of a band of fibers on convex surfaces and/or with edges. The machine comprises a fiber application head and a moving system for moving the application head. The application head comprises a compacting system including a compacting roller intended to come in contact against the application surface to apply the band, and a compacting member placed downstream from the compacting roller and exhibiting a substantially planar contact surface, said compacting member being capable of being pressed by its contact surface, against an application surface, substantially on the entire width of a band, by at least one contact line.

Abstract: An apparatus for winding a fiber strand onto a bobbin having a longitudinal axis has a support holding the bobbin for rotation about the axis, a supply for feeding the fiber strand in a travel direction generally radially or tangentially to the bobbin, and a drive for rotating the bobbin about the longitudinal axis and for, when a fiber strand is engaged with the bobbin, winding the fiber strand onto the bobbin. A handling device is rotatable about the axis adjacent the bobbin and carries a strand layer for at a start of a winding operation moving into a predetermined angular position and pressing a leading end of the fiber strand against the bobbin. The handler also carries a cutter on the handling device for at an end of a winding operation cutting the fiber strand and thereby forming a trailing end attached to the bobbin and a new leading end.

Abstract: A winding assembly for a transformer includes a wire winding and a sheet winding. The wire winding includes a spirally wound insulated wire and the sheet winding includes a metallic winding sheet that forms a single turn winding. Instead of winding the wire winding on a bobbin, sleeve or the like, the wire winding is attached directly to a surface of the winding sheet by means of a self-bonding technique.

Abstract: An apparatus for producing tubes formed from fiber reinforced composite material, the apparatus including: an elongate hollow mandrel (3) having an internal mandrel cavity (5), the mandrel having an external surface (7) upon which reinforcing fiber material (9) can be wrapped to provide a composite lay-up (10) supported thereon; and fluid flow means (11) for enabling heat transfer fluid of different temperatures to be circulated through the mandrel cavity (5), such that when fluid at an elevated temperature is circulated, heat is transferred from the fluid, through the mandrel (3) to the composite lay-up (10) for curing or forming said lay-up.

Abstract: Housings for reverse osmosis filter cartridges and methods of making the same. The housings include: (1) a hollow cylindrical liner formed of a thermoplastic polymer that is adapted to surround a reverse osmosis filter cartridge; (2) a hollow head assembly that includes a transition collar portion formed of a thermoplastic polymer that is joined to said liner and a barrel portion formed of a chopped glass fiber-filled polymer that is overmolded onto said transition collar portion; (3) an end plug that is adapted to be received within an opening in the barrel portion; and (4) an overwrap layer comprising wound glass filaments and a polymeric resin that covers the outer surfaces of the liner and head assembly.

Abstract: Method for winding textile threads to filter bobbins for filtration purposes of petrochemicals, by, in a first operation, winding 4 layers laid at 30 degrees both ways, in a second operation winding 5 layers laid at 40 degrees both ways, in a third operation winding 9 layers laid at 35 degrees both ways, in a fourth and last operation winding 12 layers laid at 15 degrees one way and just with 50 degree transfer back for each layer, and repeating the first, second, third and fourth operations, the threads used thereby comprising 58% cotton, 16% acryl, 11.5% flax, 11.5% polyester, 2% polyamide, 0.6% acetate and 0.4 % viscose.

Abstract: Processes for making fiber-on-end materials are provided. The materials can be used to make a variety of finished articles.

Abstract: A pressure vessel is provided including an inner tank formed from a tank liner surrounded by a wound layer of composite filaments. A protective jacket is disposed on the inner tank that facilitates stacking and portability of the pressure vessel and helps to define an air passage for convective heat transfer between the hybrid tank and the environment.

Abstract: A non-compliant medical balloon, where the non-compliant medical balloon may be changed from a deflated state to an inflated state by increasing pressure within the balloon, is made with a first fiber layer, a second fiber layer over said first fiber layer such that the fibers of the first fiber layer and the fibers of the second fiber layer form an angle and a binding layer coating the first fiber layer and said second fiber layer. The interior surface area of the non-compliant medical balloon remains unchanged when the balloon changes from a deflated state to an inflated state.

Abstract: An apparatus for producing an elastomeric nonwoven laminate including a plurality of elastomeric strands joined to a nonwoven web in a controlled distribution is provided. The apparatus includes an extruder for extruding a plurality of elastomeric strands onto a cooled surface of a rotating drum, which transports the strands in parallel alignment to a nip formed between two rollers rotating about parallel axis. The drum transfers the plurality of strands to the nip in a controlled distribution where it is bonded with the nonwoven. The apparatus also includes elements which automate the apparatus for creating the elastomeric nonwoven laminate.

Abstract: A fiber optic faceplate fabricated using a series of stacked ribbon structures. Each ribbon structure comprises optical fiber segments that run from an input edge to an output edge with fixed input and output fiber-to-fiber spacing. Input and output edge spacers may be used to provide spacing between stacked ribbon structures. Ribbon structures may be provided individually or as one or more sheets of ribbon structures.

Abstract: A method of making an elastic composite is provided. The method entails conveying a first web of material along a web plane path. The method also entails applying a first section of a first elastic strand onto the first web and generally transversely to the web plane path and applying a second section of a second elastic strand onto the first web and generally transversely to the web plane path. These applying steps are repeated while performing the conveying step, thereby arranging a plurality of first and second elastic elements on the first web, in generally parallel relation to one another. The resultant composite is suitable for incorporation into a disposable absorbent garment, textile or fabric structure, and the like.

Abstract: A method for manufacturing a solenoidal magnet having one or more coils wound onto a cylindrical former, and an annular end coil (20), mounted onto an end of the former such that no part of the former is present on the radially inner (A1) or axially outer (B2) sides of the end coil.

Abstract: The invention relates to an apparatus and method for constructing a flywheel for energy storage, the flywheel having a drive transfer element (60) and a rim comprising a mass element (10), the drive transfer element being coupled to the rim by a winding (80) around each.

Abstract: A method for fabricating a grid-stiffened structure from fiber-reinforced composite materials. Ribs are formed on a smooth hard base tool. Expansion blocks are placed in the shallow cavities formed by the ribs and the base tool, and held in place by one of several means while a skin is placed over the ribs, expansion blocks, and base tool. The assembly is then placed in a vacuum bag and autoclave cured. After cooling, the formed structure is separated from the base tool and the expansion blocks are removed from the cavities. This abstract is provided to comply with the rules requiring an abstract, and is intended to allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: A steerable kink resistant access device is provided having an elongated body and a steerable portion. The access sheath has an outside diameter sufficiently small so that it may be inserted into a body cavity or conduit. The access sheath typically has two internal lumen, a first lumen sized and configured as an access to a surgical site and a second lumen sized and configured to contain a tensioning device that, when acted upon, will deflect the steerable portion. The tensioning device may be directly or remotely attached to an actuation device that operates to control the tensioning and loosening of the tensioning device.

Abstract: A composite member and an associated method for forming the composite member are provided. The composite member is formed of a plurality of elongate tapes. Each tape is disposed a path defined by a plurality of natural path segments, each of which defines a non-natural offset angle relative to the adjacent segments.

Abstract: For use in the manufacture of reinforcement layers for flexible pipes which are capable of absorbing compressive or tensile forces, and which are used for the transport of oil and gas, a thermoplastic material is applied to a strength-imparting layer. The strength-imparting layers are reeled on reels, and following unreeling they are laminated by application of heat and in direct continuation applied to the flexible pipe. The strength-imparting layer expediently consists of a polymer which is reinforced with at least 20% by volume of fibres. The thermoplastic material is of a reversible type, i.e. it may change from being relatively soft, but non-sticky by changes in temperature. The use of the method according to the invention allows manufacture of very strong reinforcements for flexible pipes which cannot be manufactured using a solid material, such as steel, since high performing bending forces are required in the shaping.

Abstract: A pressure vessel and method for producing a pressure vessel is disclosed. The pressure vessel comprises a liner shell fabricated from composite material applied to a soluble mandrel having a body shaped to pattern an interior of the pressure vessel, the liner shell having an opening, a boss having an aperture therethrough, the boss sealingly bonded to the liner shell with the aperture adjacent the opening, and an outer shell fabricated from plies of composite material filament impregnated with matrix material wound over the liner shell and the boss, but not over the aperture.

Abstract: The present invention relates to a method for manufacturing a composite container with different opening sizes, which is accomplished by winding with fibers impregnated with resin. First, fibers impregnated with resin are wound on a first substrate for winding a first container, wherein first openings are positioned at both ends of the first container. Then, cut the first container into two shells with a first opening each, and slip one of the shells on a second substrate. Next, fibers impregnated with resin is used for winding the second substrate and the shell such that the fibers impregnated with resin wound on the second substrate and the shell are combined to form a second container, where both ends of the second container are the first opening and a second opening with different opening sizes. Thereby, filament winding can be applied for manufacturing containers with different opening sizes on both ends, and the technique of manufacturing and performance of containers are enhanced.

Abstract: The present invention provides a pressure shell formed by winding reinforcement fibers with resin material for hardening on an outer surface of a hollow tank base body, a high-pressure tank having the pressure shell, a manufacturing method of the high-pressure tank, and an apparatus for manufacturing the high-pressure tank. The pressure shell adopts the laminated structure in which a large number of fiber layers each formed by winding the reinforcement fibers around the tank base body are laminated. In a state the inside of the high-pressure tank is emptied, a compressive stress is applied to a lower fiber layer and a tensile stress is applied to an upper fiber layer. Particularly, in winding the reinforcement fibers around the tank base body, the reinforcement fibers are wound while filling fluid for pressure regulation in the tank base body, regulating a pressure applied to the fluid for pressure regulation, and adjusting a tension applied to the reinforcement fibers.

Abstract: A method of making a cylindrical pressure vessel (11) with a large diameter port in its sidewall includes the step of providing a mandrel (23) of desired diameter and filament winding upon the same. After winding one overall innermost layer, an annular reinforcement belt (16) is helically wound atop a defined region using a band (60) of resin impregnated parallel strands (39) under tension. The annular belt (16) is then itself helically overwound with the resin impregnated parallel strands of filamentary material under tension to provide two complete outer layers. After curing and removal from the mandrel (23) at least one aperture (71) is cut in the sidewall within the reinforcement belt (16) and a side port fitting (75) is installed in the aperture (71).

Abstract: The present invention relates to apparatus and methods for winding filament to create a structure. In one embodiment, the invention includes the application of filament to a rotating mandrel to create a desired shape. The invention includes the filament winding of both simple and complex shapes.

Abstract: An apparatus comprising a fiber placement head assembly and an infrared heating assembly is provided. The fiber placement head assembly includes a compaction roller assembly and a feeder assembly. An infrared heating assembly, a cooling mechanism, temperature sensors, and a controller are operably coupled to the fiber placement head assembly. The infrared heating assembly includes an infrared heater that generates a heating profile. The heating profile defines a heating zone on either a tool or previously laid tows. If the burn point of either the tool or previously laid tows within the heating zone is approached, the controller, which receives temperature readings from the temperature sensors, simultaneously disables the infrared heater and activates the cooling mechanism. As such, the tool and the previously laid tows are protected from being ruined due to an over temperature condition.

Abstract: A method and device for manufacturing a body, a device for implementing the method, and products obtained by the method. In the method, at least a first heated composite strip is introduced into at least one die, and at the same time, at least one molten material is introduced into the die in contact with the first composite strip, to obtain at least one second composite strip, and the second composite strip is wound around a support rotating about its axis.

Abstract: An assembly and method for manufacturing a composite reinforcement for unitizing a structure are provided. According to one embodiment, the assembly includes a base having a plurality of pins extending outwardly therefrom to define a structure about which a composite fiber is wound to define a composite reinforcement preform. The assembly also includes a plurality of mandrels positioned adjacent to the base and at least a portion of the composite reinforcement preform, and a cap that is positioned over at least a portion of the plurality of mandrels. The cap is configured to engage each of the mandrels to support the mandrels and the composite reinforcement preform during a curing process to form the composite reinforcement.

Abstract: A method of winding fibers on a mandrel, the wound fibers being in tension, includes providing a source of fibers, imposing a torque on the source that resists dispensing the fibers from the source to exert a tension on the fibers, adding ultra-violet sensitive material that is polymerized by exposure to ultra-violet light to a resin matrix, impregnating dispensed fibers with the additive containing resin matrix, rotating a mandrel to wind the impregnated fibers on the mandrel, the rotation of the mandrel acting to overcome the torque on the source and putting the fibers in tension, and in situ, quasi instantaneously polymerizing the additive containing resin matrix on the mandrel by means of exposing the additive containing resin matrix to ultra-violet light for a selected period of time, such polymerization acting to lock in the tension in the fibers at the time of polymerization. A rail gun fabricated by means of the above method is further included.

Abstract: A method of manufacturing a composite riser section with a liner assembly comprises holding the liner assembly in a horizontal position, bowing the liner assembly upward, and winding resin impregnated fibers about the liner assembly to form a structural composite overwrap. Another method of manufacturing a composite riser with a liner assembly comprises holding the liner assembly in a horizontal position between two supports, and winding resin impregnated fibers about the liner assembly to form a structural composite overwrap. A system for manufacturing a composite riser section with a liner assembly having a longitudinal axis comprises a first support and a second support that hold the liner assembly in a horizontal position therebetween, and a plurality of rollers that rotate the liner assembly about the longitudinal axis.

Abstract: A method for production of fiber composite components, particularly suitable for the production of profiles of complicated shape with varying profile cross-section and/or with at least parts with curved lines, such as used for the production of aircraft, for example. The method (a) produces plural core components, (b) separates application of a first fiber material to each of the core components, (c) assembles the core components provided with the first fiber material to form a sequence of core components, (d) applies a second fiber material common to the core component sequence along at least one side of the core component sequence, provided with the first fiber material, (e) impregnates and hardens the first and second fiber materials to form a fiber-reinforced component body, and (f) separates the component body into plural sections as represented by the fiber composite components.

Abstract: An apparatus and method are provided for replacing a creel in a fiber placement machine, by sequentially moving replaceable creels into place on the fiber placement machine, via tracks and/or guide rails, as one or more spools in a previously operating creel are exhausted, and removing the creel having the one or more exhausted spools, to thereby allow fiber placement to continue from the replacement creel while the creel having one or more exhausted spools of material is replenished. An auto-splice apparatus and method are incorporated into the replaceable creel and fiber placement machine, for assisting in the exchange of replaceable creels.

Abstract: A molding system includes a flexible cable carrier body that defines a sealing opening that provides access to an interior channel. A continuous length of the flexible cable carrier body is wrapped about a spool for storage and for ease of dispensing at a work site. The continuous length of the cable carrier body is cut to desired custom lengths during installation at the work site. An insertion tool having a plow and feeder channel can facilitate payoff of the fiber/cable into the cable carrier body.

Abstract: Exemplary embodiments provide precision resistive composite members and methods for manufacturing and using them. The resistive composite member can have controllable dimensions, geometric shapes, mechanical properties and resistance values. The resistive composite member can be used for high-performance sensors or instrument probes that require, for example, high contact pressure, ultra-high frequency, and/or enable state-of-the-art digital signal transmission, characterization, or measurement. The resistive composite member can include one or more “twisted-fiber-tow” or one or more arrays of “twisted-fiber-tow” contained in a suitable non-metallic or essentially non-metallic binder material. The “twisted-fiber-tow” can further include a number of fibers that are twisted individually and/or in bundles in order to control the mechanical properties and fine-tune the resistance of the resistive composite member and thus to customize the high-performance instrument probes.

Abstract: According to the present invention, a gas tank having a gas-barrier inner shell and an outer shell that is formed so as to cover the inner shell and is made of a pressure-resistant FRP, such outer shell comprising reinforcing fiber bundles (A), a thermosetting resin (B), and an elastomer particles and/or thermoplastic resin particles (C), provided that elastomer particles and/or thermoplastic resin particles (C) that have been dispersed in a thermosetting resin (B) exist in reinforcing fiber bundles (A), is provided. Such gas tank is excellent in strength and heat resistance and has suppressed gas permeability.

Abstract: The present invention relates to a tubular-shaped component (19) for an aeronautical fuselage made of composite materials comprising an outer skin (1) without joints having a cylindrical or cylindrical-conical shape, a plurality of stiffeners or stringers (2) longitudinally arranged in said outer skin (1) and a plurality of anchoring elements (3) for anchoring other elements to subsequently be incorporated transversally arranged between said stiffeners or stringers (2). The invention also comprises a jig (18) comprising a support body (12) and a plurality of panels (9) that can shift between an extended position (10) and a retracted position (10?) in both directions and a process for manufacturing said component (19) in the last step of which once the tubular component (19) is formed and cured, it is separated from the jig (18) by means of a longitudinal movement after the shifting of those elements of the jig (18) preventing it, and particularly the panels (9) that can be shifted.

Abstract: A system according to the present invention may be comprised of an epoxy resin, hardener and catalyst. One particular preferred system ratio is 1:1.64:0.005, respectively. The epoxy resin may be a tetrafunctional resin. The hardner may be a nadic methyl anhydride. One particularly preferred heat activated catalyst is 1-(2-hydroxypropyl) imidazole available from the Lindau Company under the brand name LINDAX 1. The amount of catalyst may be tailored to a certain desired pot life, oven cure and to promote polymer crosslinking at a faster rate. The system is particularly advantageous in the fabrication of composite bridge plugs.

Abstract: A method of making a wound glass filament web, the method including forming a plurality of continuous glass filaments, winding the filaments on a drum, and contacting the filaments with an aqueous binder composition having a pH of at least 4.0 and including an aqueous carboxy functional polymer and a condensation catalyst.

Abstract: Method for winding textile threads to filter bobbins for filtration purposes of petrochemicals, by, in a first operation, winding 4 layers laid at 30 degrees both ways, in a second operation winding 5 layers laid at 40 degrees both ways, in a third operation winding 9 layers laid at 35 degrees both ways, in a fourth and last operation winding 12 layers laid at 15 degrees one way and just with 50 degree transfer back for each layer, and repeating the first, second, third and fourth operations, the threads used thereby comprising 58% cotton, 16% acryl, 11.5% flax, 11.5% polyester, 2% polyamide, 0.6% acetate and 0.4 % viscose.

Abstract: A structure has an inner, load bearing member and a surrounding, concentric over-wrap. The inner member is composed of a carbon composite and the over-wrap is composed of a non-carbon composite. The inner member has a negative coefficient of thermal expansion and the over-wrap has a positive coefficient of thermal expansion that is an order of magnitude greater than that of the inner member. When subjected to cryogenic temperatures, the over-wrap will shrink and apply a compressive force against the inner member, to resist the creation of microcracks in the inner member.

Abstract: A method for fabrication of a bent reinforcing rod in a composite material is described, where the reinforcing rod is composed of longitudinal fibers and a sheathing layer of fibers or foil, comprising the steps: to moisten fiber thread with a binding agent, to reel the moistened fiber thread to a bundle with a closed, approximately circular shape, consisting of a layer of longitudinal, parallel fibers of a desired thickness, whereby all the fibers in the layer obtain an approximately equal axial tightening, and to envelope an outer layer of fiber threads, and/or foil, or other suitable material, around the layer of longitudinal fibers, and that the fabricated blank is given a final form in a second forming process. The invention also relates to a device (10) for carrying out the method.

Abstract: A method for manufacturing a pressure vessel includes the steps of obtaining a metal liner and applying a first layer of adhesive to an outer surface of the metal liner. The metal liner is then placed into a vacuum bag and a vacuum is applied, thus securing the adhesive to the outer surface of the metal liner. After curing of the adhesive, a filamentary material is wound around the liner, where the filamentary material adheres to the first layer of adhesive forming an overwrap layer on the outer surface of the metal liner, forming the pressure vessel.

Abstract: A method for fabricating a grid-stiffened structure from fiber-reinforced composite materials. Ribs are formed on a smooth hard base tool. Expansion blocks are placed in the shallow cavities formed by the ribs and the base tool, and held in place by a synthetic elastomer-based adhesive while a skin is placed over the ribs, expansion blocks, and base tool. The assembly is then placed in a vacuum bag and autoclave cured. After cooling, the expansion blocks are removed and the formed structure is removed from the hard base tool. This abstract is provided to comply with the rules requiring an abstract, and is intended to allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: The invention relates to the use of a composition for producing parts by filament winding, which comprises at least one type of resin formulation containing at least one type of thermosetting resin, at least one type of miscible rheology regulating agent which provides the composition with a viscosity difference whose factor is equal to or greater than 100 between a high-temperature state at a C1 shear rate and a low temperature state at a C2 shear rate, wherein the difference in temperature between the high-temperature and the low-temperature state is equal to or greater than 30° C., the C1 shear rate is greater than the C2 shear rate and the composition exhibits a Newtonian behavior in the high-temperature state thereof.

Abstract: A method of manufacturing a unitary seamless section of an aircraft fuselage comprises disposing a thin lay-up mandrel element onto the outer shell surface of a cylindrical inner mandrel shell, thereby forming a mandrel with a lay-up surface. A plurality of resin impregnated stiffener fibers may be layed-up within a plurality of stiffener channels in the lay-up surface to form a plurality of stiffeners or stringers. The method further includes laying up a plurality of resin impregnated skin fibers onto the lay-up surface while the mandrel rotates to form a unitary pre-cured section of an aircraft fuselage.

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: The invention relates to a process for manufacturing a tubular part, which includes an insert made of a metal matrix composite and within which ceramic fibers extend. The process comprises the following steps: the filaments of a filament bundle are fixed close to one end of a support part, said filaments being separate from one another and each filament comprising a ceramic fiber coated with a metal sheath; and all the filaments of the bundle are wound around the support part along a helical path.

Abstract: To provide a fiber reinforced resin sleeve that is superior in mechanical strength in low cost and easily without enlarging the sleeve and increasing the weight of the sleeve, a method for manufacturing an internal pressure container in which both end portions of a fiber reinforced resin sleeve 1 formed by continuously winding a fiber in a filament winding method with both ends having larger diameters are closed by closure lids 2, and the closure lids 2 are supported by retainer rings 3 coupled to the sleeve 1, comprising the following steps of: continuously winding the fiber, impregnated with the resin, on a mandrel substantially in a perpendicular direction to an axial direction of the mandrel to form a first layer F; setting the first layer F so that a distal end is located in a position at a predetermined position L from an end of the sleeve 1 and a proximal end is located in a position inside of the closure lid 2 and the retainer ring 3; subsequently continuously winding the fiber on the first layer F at

Abstract: A two roll impregnator for impregnating fiber reinforcement for use in filament winding operatives contains two abutting rolls, at least one and preferably both having an elastomeric surface. Resin is constrained within a bath whose lower surfaces are defined by the abutting rollers and side dams. Fiber reinforcement is drawn over a first roller through the resin bath and between the closed nip of the abutting rollers, where full impregnation is fostered, excess resin removed, and the impregnated fiber degassed. Substantially dripless operation can be maintained.

Abstract: The present invention provides a method of forming hybrid and composite filters, which are more durable than that of the prior art. The method of forming a hybrid tubular filter includes wrapping a first layer of fiber, wrapping a filtering material and then wrapping a second layer of fiber. A mandrel is retained in a lathe chuck or the like and an end of fiber is attached to the mandrel. A fiber guide moves parallel to a length of the mandrel according to the direction of a control device. The method of forming a composite tubular filter includes wrapping a first layer of fiber around a mandrel.