Abstract: The present disclosure is relates to a TPU ball structure and a manufacturing method thereof. The TPU ball structure includes a ball bladder layer, a yarn layer and a surface layer. The ball bladder layer is made of TPU material. The yarn layer is made of TPU material, and the yarn layer is disposed to cover the ball bladder layer. The surface layer is made of TPU material, and the surface layer is disposed to cover the yarn layer. The above layers of the TPU ball structure are made of TPU material to satisfy a requirement for environmental protection, and are recyclable. There is no need to use adhesive to adhere the above layers of the TPU ball structure. Therefore, the peeling strength between the layers of the TPU ball structure can be increased so that the whole peeling strength of the TPU ball structure can be increased.

Abstract: A basketball that comprises a carcass and a cover assembly. The carcass includes a plurality of recess disposed between a plurality of grooves. The cover assembly includes a plurality of cover panels positioned within the recesses. Each of the plurality of grooves comprises a central channel. The central channel is defined by a bottom wall, a first side wall, and a second side wall. The first and second side walls are substantially planar. The central channel defines a channel depth of between about 3 mm and about 4 mm, and each of the plurality of grooves defines a ridge distance of between about 10 mm and about 12 mm.

Abstract: The present invention relates to a ball structure and a method for making the same. The ball structure includes an inner bladder and a plurality of covers. The covers surround the inner bladder. Each of the covers includes a base fabric and a resin layer. The resin layer has a recess portion at the periphery of the cover, so that the recess portions of adjacent covers defines a groove. The base fabric includes a first portion and a second portion. The first portion corresponds to the recess portion, and the second portion is away from the recess portion. The thickness of the first portion is substantially equal to the thickness of the second portion.

Abstract: An orthopedic device for implanting between adjacent vertebrae comprising: an arcuate balloon and a hardenable material within said balloon. In some embodiments, the balloon has a footprint that substantially corresponds to a perimeter of a vertebral endplate. An inflatable device is inserted through a cannula into an intervertebral space and oriented so that, upon expansion, a natural angle between vertebrae will be at least partially restored. At least one component selected from the group consisting of a load-bearing component and an osteobiologic component is directed into the inflatable device through a fluid communication means.

Abstract: A sport ball includes a casing formed from a plurality of panels joined together at a plurality of seams. Each of the plurality of panels includes (a) a first layer having a first thickness, formed from a polymer material, and positioned to form a portion of an exterior surface of the sport ball; (b) a second layer having a second thickness, formed from a polymer foam material, and positioned inward and adjacent to the first layer; and (c) a third layer positioned inward and adjacent to the second layer. The first layer defines a first indentation therein. The first layer is bonded directly to the third layer at the first indentation, and the first indentation has a first indentation thickness equal to a sum of the first thickness and the second thickness. The sport ball also includes a bladder located within the casing.

Abstract: A basketball includes a bladder, electronics within the bladder proximate an outer portion of the bladder, windings about the bladder, and a molded elastomeric layer about the bladder and extending over the electronics.

Abstract: A method of producing an exercise weight structure comprises mixing a particulate material with a binder material and molding the resulting mixture to an appropriate shape. An outer skin for the exercise weight structure is firstly formed of a resilient material, and forms a mold into which an inner weight section or body is molded or cast. The inner weight section and the outer skin are both formed of recycled material and include a common binder material.

Abstract: A baseball/softball comprises a core and a cover, wherein the core is wrapped with a layer of fiber material, and the layer of fiber material is wrapped and glued with the cover. A method of processing baseball/softball comprises wrapping the core with the layer of fiber material, placing the core and the layer of fiber material into a cover material, placing the core, the layer of fiber material outside the core and the layer of cover material outside the layer of fiber material into a mold; molding the layer of cover material into the cover through a vulcanization process, gluing a vulcanization melting layer formed on inner wall of the cover to the layer of fiber material, and finally taking the finished product out of the mold. From the perspectives of smell, touch and visual sense, the product has good simulation effect of baseball/softball and better service effect.

Abstract: A method for manufacturing a sports ball comprises cutting outer panels and inner padding cut-outs from three different sheet materials. The internal padding layer materials have perforations and are geometrically similar in shape, but smaller than the outer panel cut-outs. A layer of heat-reactive adhesive that expands upon heating is applied in the machine-stitched seam areas before the panels are stitched together. The padding layer is glued to the inside-out ball cover before the cover is turned right-side out. A reinforced bladder is inserted into the cover. The remaining seams are stitched shut utilizing one of various different methods, and then the ball is molded in a heat and pressure mold that causes the seams to be welded as well as stitched, due to the expansion of the heat-reactive adhesive to cover the stitching in the seams. Enhanced performance characteristics of the resulting ball arise from the air spring aspects provided by the combined features.

Abstract: A ball sealer for hydrocarbon resource recovery, comprising: a generally spherical entire structure including at least two layers of a spherical core and a surface resin layer covering the spherical core, of which at least the surface resin layer comprises a polyglycolic acid resin; and having a diameter of at least about 25 mm (1 inch). The ball sealer is produced through a process comprising the steps of: disposing a spherical core by a support pin at a substantially central position within a mold cavity, injecting a surface resin comprising a polyglycolic acid resin into the cavity surrounding the spherical core, causing the support pin to retreat up to a wall surface of mold cavity in synchronism with a completion of the injection of the surface resin, and then hardening the surface resin.

Abstract: A method for manufacturing a sports ball comprises cutting outer panels and inner padding cut-outs from three different sheet materials. The padding layer materials have perforations. A layer of heat-reactive adhesive that expands upon heating is applied in the machine-stitched seam areas before the panels are stitched together. The padding layer is glued to the inside-out ball cover before the cover is turned right-side out. A reinforced bladder is inserted into the cover, the remaining seams are stitched shut, and then the ball is molded in a heat and pressure mold that causes the seams to be welded as well as stitched, due to the expansion of the heat-reactive adhesive to cover the stitching in the seams. Enhanced performance characteristics of the resulting ball arise from the air spring aspects provided by the combined features.

Abstract: A composite ball is formed with wound filament in a winding machine by winding the filament on a core, which can be permanent and form part of the finished ball. Alternatively, the core can be temporary. When winding is completed, the wound body is removed from the winding machine, an exterior of the wound body is finished, and the wound body is cured. When the core is permanent, at least a portion of the core is removed from the winding machine along with the wound body so any excess of the permanent core can be removed. The temporary core, however, is removed from the wound body, and the void is filled with filler material.

Abstract: A method of making a game ball having a carcass comprising a foamed intermediate layer and a plurality of raised seams made from an outer layer is disclosed. The foamed intermediate layer may be formed from two sheets of foamed material. The sheets are shaped to have leaves that can be folded into the shape of a hemisphere with no gaps between adjacent leaves. The sheets are placed around a bladder, an outer layer is placed around the sheets, and the combination is heat molded. The seams are not made from strips of seam material placed on the outer layer of the carcass.

Abstract: A method for fabricating a grid-stiffened structure from fiber-reinforced composite materials. A skin is applied to a smooth, hard base tool. Ribs comprised of carbon-fiber tows are formed on the skin, and shallow cavities are formed between the ribs and the skin. An expansion block is placed in each of the cavities, and is held in place by an elastomeric contact adhesive having adhesive properties that are substantially diminished when the adhesive is heated to an elevated curing temperature. The assembly is then autoclave cured. After cooling, the formed structure is separated from the base tool and the expansion blocks are removed from the cavities. A grid-stiffened sandwich structure is formed by applying an outer skin over the ribs and expansion blocks, before curing the assembly. After cooling, the outer skin is removed to allow extraction of the blocks, and subsequently bonded to the ribs.

Abstract: A method for fabricating a grid-stiffened structure from fiber-reinforced composite materials. A skin is applied to a smooth, hard base tool. Ribs comprised of carbon-fiber tows are formed on the skin, and shallow cavities are formed between the ribs and the skin. An expansion block is placed in each of the cavities, and is held in place by an elastomeric contact adhesive having adhesive properties that are substantially diminished when the adhesive is heated to an elevated curing temperature. The assembly is then autoclave cured. After cooling, the formed structure is separated from the base tool and the expansion blocks are removed from the cavities. A grid-stiffened sandwich structure is formed by applying an outer skin over the ribs and expansion blocks, before curing the assembly. After cooling, the outer skin is removed to allow extraction of the blocks, and subsequently bonded to the ribs.

Abstract: An inflatable sports ball structure and a manufacturing method thereof are disclosed. The inflatable sports ball structure comprises of an inner bladder, a reinforced carcass containing thread, and an exterior material layer. The reinforced carcass covers the surface of the inner bladder, and has a thread wound layer. Part of the thread wound layer is embedded in the reinforced carcass and provides a constricting force towards the inner bladder, and a small remaining part of the thread wound layer may be exposed on the outer surface of the reinforced carcass.

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 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 provides a panel of the ball for ball game, said panel has the folding portion and the opposite folding portion on its periphery, which are opposite to each other and made of the same continuous material. The folding portion and the opposite folding portion of said leather panels have the good engaging property and difficult to separate with each other during usage because they are made of the same material. The panel has simple manufacturing process and low production cost, making the ball for ball game comprising above panels have good using properties, simple manufacturing process and low production cost.

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: In a method for manufacturing a basketball, a basketball semi-product that includes an inflated bladder and a winding layer surrounding the bladder is prepared. A large-area rubber sheet and a large-area polyurethane sheet are prepared, and are interconnected fixedly so as to form a two-layer sheet. The two-layer sheet is cut to form a plurality of cover panels, each of which includes a small-area rubber sheet and a small-area PU sheet that abut against each other. The cover panels are adhered to an outer surface of the winding layer so as to form a ball body which has an outer surface that is formed with a channel network among the cover panels. The ball body is subsequently vulcanized.

Abstract: A new, novel and useful Oriented Thermoplastic Elastomer Thread Wound Golf Ball providing improved combinations of good spin for ball control on iron or wedge shots while providing for higher hardness and long travel with driver shots. The Oriented Thermoplastic Elastomer Thread Wound Golf Ball's performance is acheived by the incorporation of oriented thermoplastic elastomer threads in the golf ball design.

Abstract: A method for manufacturing a rubber basketball is disclosed, which has the following steps: (a) supplying a sheet of rubber material in a suitable shape and size; (b) folding, compressing and cutting the rubber material to make the rubber material into a bladder; (c) mounting a valve in the bladder; (d) inflating the bladder with air and curing the bladder at a temperature from 130° C. to 150° C.

Abstract: A soft stretch yarn substantially comprising polyester fibers has a stress, at 50% yarn stretch, of no more than 30×10−3 cN/dtex and, at the same time, a percentage recovery of at least 60%. Preferably, the Uster unevenness is no more than 2.0% and the crimp diameter is no more than 250 &mgr;m. This soft stretch yarn can be produced by spinning yarn of conjugate fibers comprising two types of polyester in which one component is PTT at a take-up velocity of at least 1200 m/min, drawing at a drawing temperature of 50 to 80° C. at a draw ratio such that the drawn yarn tensile elongation is 20 to 45%, and then heat setting.

Abstract: The invention relates as a whole to composite structures and may be used, in particular, in the manufacture of bodies or compartments of flying vehicles used in rocketry and aeronautics.A composite shell shaped as a body of revolution comprises a load-bearing framework of a multilayer structure consisting of intersecting spiral and annular strips arranged at intervals and forming cross nodes and stiffening ribs therebetween, an outer load-bearing shell, fine-cellular layers consisting of spiral and annular strips therebetween, surrounding the stiffening ribs of the framework in the directions thereof, and having the width exceeding the width of the strips in the ribs and forming their bearing flanges. The spiral and annular strips of the framework and of the fine-cellular layers, and the outer load-bearing shell are made of unidirectional fibers and a polymer binder.

Abstract: The inventions relate to the field of machine manufacturing and more specifically, to shell-type construction of base members used in aviation engineering and rocketry, which operate under conditions of combined stressed state, to the methods of and mandrels for their manufacture.A load-carrying tube-shell comprises a cellular framework 1 made of spiral and annular strips 4, 5 crossing each other to define layers 3 of systems repeated over the thickness of the wall thereof so that stiffening ribs 6, 7 with criss-crosses 8, 9, 10 are thus formed, and outer coating layers 2 respectively made of unidirectional filaments 11 bound by a cured polymeric binder 12. Damping-absorbing layers 14 of resilient-elastic material such as rubber or polyurethane are disposed between the layers 3.A method of the manufacture of the tube-shell comprises a step of introducing intermediate continuous forming strips 20 placed beneath the layers 4, 5 laid down under tension.

Abstract: A sportsball includes a ball cover and a bladder. The ball cover has a valve hole provided thereon and consists of a plurality of panels connected edge to edge by machine sewing to form a roundness shape. Each of the panels has a predetermined shape and is made of leather or synthetic leather, wherein the synthetic leather has an outer coating layer, an inner lining layer, and an intermediate layer which is integrally formed between the outer coating layer and the inner lining layer and is strengthened and supported by the inner lining layer. The bladder is disposed inside the ball cover and includes a rubber made bladder ball, an exterior web layer integrally adhered on an outer surface of the bladder ball, and a valve stem which is mounted on the bladder ball and is extended through the valve hole of the ball cover to connected thereto for air inflation. The web layer includes at least an elongating strengthened thread evenly wound around and around the outer surface of the bladder ball.

Abstract: Disclosed is a thread wound golf ball comprising a center, a thread rubber layer formed by winding a thread rubber around the center and a cover formed on the thread rubber layer, wherein the thread rubber is obtained by cutting, into a suitable width, a rubber sheet for thread rubber which is obtained by vulcanizing a raw rubber sheet for thread rubber using a pressure rotary drum type continuous vulcanizing device.

Abstract: A method for making a ball for sports comprises providing a round rubber tube, forming a reinforcing layer of a yarn wound about the tube, forming a rubber cover layer formed on the reinforcing layer, and vulcanizing the rubber cover layer to provide a carcass. In the method, the reinforcing layer is formed by winding, in combination, a covered yarn made of a urethane elastomer core thread wound thereabout with a synthetic resin filament or in combination with the synthetic resin filament and a yarn made of a member selected from the group consisting of cotton, polyesters and polyamides. The carcass may be attached with a skin layer made of a natural or artificial leather. Alternatively, the round rubber tube having the reinforcing layer may be attached with a skin layer.

Abstract: The thermic protection device is obtained by winding refractory wires with plush loops and radial and reinforcement armament picots, also with refractory fibers, preferably twisted. The plush loops and the picots have a predetermined orientation and/or pitch with respect to the direction of the ablative flow in the hollow structure.Application for the embodiment of the ferrule of a ram jet engine chamber.

Abstract: Disclosed herein is a process for producing quality thread-wound golf balls efficiently by fixing the starting end and/or terminating end of rubber thread rapidly in a simple manner. When a core is wound with rubber thread to form a layer of wound rubber thread, a hot-melt adhesive (in the molten state) is dropped on the starting end of rubber thread resting on the core surface and is subsequently allowed to solidify, so that the stating end of rubber thread is fixed to the core. After the completion of winding, the terminating end of rubber thread is fixed to the layer of wound rubber thread with a hot-melt adhesive in the same manner as mentioned above.

Abstract: A tubular printing blanket for a blanket cylinder in an offset printing press includes a cylindrical sleeve, a compressible layer over the sleeve, and an inextensible layer over the compressible layer. The cylindrical sleeve is movable telescopically over a blanket cylinder. The compressible layer includes a first seamless tubular body of elastomeric material containing compressible microspheres. The inextensible layer includes a second seamless tubular body of elastomeric material containing a tubular sublayer of circumferentially inextensible material. A seamless tubular printing layer over the inextensible layer has a continuous, gapless cylindrical printing surface. Methods of manufacturing the tubular printing blanket are also disclosed.

Abstract: Disclosed are a process for producing a tubular nonwoven fabric and tubular nonwoven fabrics produced by the same. In the process, a web is formed on a first rotating cylinder by catching fibers carried to the surface of the first rotating cylinder by a fluid, the web is transferred to a second rotating cylinder, a tube of the transferred web is formed on and around the second rotating cylinder, and the tube is drawn in the axial direction of the second rotating cylinder to form a tubular nonwoven fabric. The tubular nonwoven fabric with a high unit weight can be produced without elongating or breaking the nonwoven fabric, and the diameter of the tubular nonwoven fabric can be freely changed.

Abstract: A method of integrally bonding self-lubricating material to an external surface of a substratum to form a self-lubricating surface thereon comprising the steps of: A. forming the substratum to provide an external surface thereon of desired configuration; B. applying a layer of self-lubricating material onto the surface; C. applying a plurality of filaments on the layer of self-lubricating material to form an overlayment thereon to exert a bonding pressure sufficient to cause the layer of self-lubricating material to conform and bond to the configured external surface; D. applying a hardenable liquid resin prior to, simultaneously with, or subsequent to the application of the self-lubricating material and filaments to coat the material and filaments and fill any interstices that exist; E. hardening the resin; and F. removing all or part of the overlayment after the resin has hardened to expose the layer of self-lubricating material or portions thereof on the external surface.

Abstract: An automatic machine and method for preparing a wound core of a golf ball. The machine has a plurality of winding stations services by one mechanical arm. The winding station has a cooling tower for holding frozen centers, a winding machine and tension device for performing the actual winding operation and an exit chute for wound cores. The specific steps for preparing the core are disclosed.

Abstract: A golf ball with a low spin rate is made by covering the center with a layer of uncured rubber, curing the rubber layer to make a rubber shell about the core, and then winding elastic threads about the cured rubber shell to form a golf ball core. A golf ball cover is then applied to the core to form a golf ball.The center is either a solid rubber sphere or a liquid-filled hollow envelope. The thickness of the rubber shell is between 0.16 cm and 0.64 cm.

Abstract: An automatic machine and method for preparing a wound core of a golf ball. The machine has a plurality of winding stations services by one mechanical arm. The winding station has a cooling tower for holding frozen centers, a winding machine and tension device for performing the actual winding operation and an exit chute for wound cores. The specific steps for preparing the core are disclosed.

Abstract: The preparation of a wound golf ball core is accomplished with an automatic machine. The machine has a plurality of winding stations serviced by one mechanical arm. The winding station has a cooling tower for holding frozen centers, a winding machine and tension device for performing the actual winding operation and an exit chute for wound cores. The specific steps for preparing the core are further disclosed.

Abstract: A ball winding apparatus is described for winding string on a core to form the inner baseball including a ball spinning mechanism against which the core is held by a free spinning holding device where the spinning device imparts a wobble pushing the ball from side to side which is augmented by or opposed by transverse air pressure cylinders moving the holder first to one side and then to the other where the forces are balanced such that the ball holder oscillates in position to produce a random wind and a string conveyance system including hollow tubes transporting the string from the coil supply to a tension producing device feeding string to the winding ball.

Abstract: A ball sealer for use in flow equalization during fluid injection into oil wells is described which has a layer of thermosetting filament wrapped around its core. After curing, the wrapping layer provides the major part of the ball's strength.

Abstract: A fiber reinforced epoxy resin article in which a Lewis base is employed as the catalyst for the addition reaction of a phenolic or alcoholic hydroxyl group and the oxirane group of the epoxy resin. The resin system has improved flexibility and pot life and the cured article has improved chemical resistance.

Abstract: In order to improve a touch, this invention provides a ball of the inflatable type comprising a rubber tube used as a ball substrate which is introduced with gas under pressure therewithin, a reinforcing winding layer formed by simultaneously winding the combination of a nylon thread and either an elastic rubber or urethane elastomer thread around the outer periphery of the rubber tube, and a surface cover layer made of a natural or synthetic leather stock which covers the reinforcing winding layer therewith through an adhesive with or without interposing an intermediate rubber layer formed by molding and vulcanization on the peripheral surface of the reinforcing winding layer.

Abstract: A method for making conductive brushes which comprises providing a rotatable cylindrical mandrel having a plurality of longitudinal recesses on its surface, and winding electrically conductive fibers from a supply around the mandrel by rotating the mandrel. The brush backing or base may be formed by a number of methods utilizing the recesses on the surface of the mandrel. In one embodiment, the brush backing is formed by placing a strip of a conductive material in each of the recesses, and after the conductive fibers have been wound thereover, the conductive fiber windings are caused to adhere to each other by adhesive means and another strip of conductive material is placed over the windings to mate with the strip in the recess to form the backing for the conductive brush. Individual conductive brushes are obtained by cutting the conductive fibers in the longitudinal direction of the mandrel.

Abstract: A wire-reinforced hose is provided wherein such hose is defined of a helically wound strip which has at least one integral preformed convolution therein and a wire disposed in the convolution with the helical winding being such that the convolution with the wire disposed therewithin extends in a helical path along the length of the hose and the hose has a tubular inside surface with the helical wire concealed therewithin when viewing such tubular inside surface.

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: A game ball having an inner bladder and a layer of yarn wound thereabout. The yarn layer is formed by a first strand of synthetic material and a second strand of natural material. As these strands are being simultaneously wound on the inner bladder, an adhesive is applied to the strand of synthetic material. Since the strands contact each other on the bladder, the strands of natural material absorb adhesive from that applied previously to the strands of synthetic material.

Abstract: A woven seamless sleeve including axial yarns forms the inner face of an epoxy resin cylinder for an air operated linear actuator. Under certain conditions, a minute, internal, spiral groove develops in applying the resin. In the operation of the actuator the groove serves to retain lubricant.

Abstract: A molded game ball, particularly for volley-ball, hand ball and soccer is made by winding a layer of fibrous material on an inflated rubber bladder, applying a sheet of a rubber mixture with a vulcanizing agent on this layer, imprinting in a cold mold a network of fields on this layer indicating places where cover segments have to be bonded thereon so that do not get in touch one with another on their periphery and by finally pressing this semiproduct with bonded cover segments in a smooth mold at temperatures for vulcanizing.

Abstract: A thread winder having a hollow sphere divided into two halves with a spool inside concentric with the sphere. The sphere is carried on a yoke so that it can be swung about one of its axis and one-half of the sphere is rotated about the axis perpendicular to the equator line where the two halves join. The spool is rotated inside the sphere and yarn is fed through an opening in the rotatable half of the sphere. Thus, as the sphere swings and the spool rotates, the thread is wound on the spool and distributed by the swinging movement of the sphere relative to the spool.

Abstract: The present invention relates to a filament wound spherical structure comprising a plurality of filament band sets disposed about the surface of a mandrel with each band of each set formed of a continuous filament circumferentially wound about the mandrel a selected number of circuits and with each circuit of filament being wound parallel to and contiguous with an immediate previously wound circuit. Each filament band in each band set is wound at the same helix angle from the axis of revolution of the mandrel and all of the bands of each set are uniformly distributed about the mandrel circumference. The pole-to-equator wall thickness taper associated with each band set, as several contiguous band sets are wound about the mandrel starting at the poles, is accumulative as the band sets are nested to provide a complete filament wound sphere of essentially uniform thickness.