Abstract: A polyester resin composition is provided that exhibits a low shrinkage ratio and excellent mold release properties while maintaining a high mechanical strength, that also provides excellent surface properties and an excellent appearance for a molded article and an excellent appearance when vapor deposited, and that resists the production of fogging even during high-temperature use. An injection molded article, a light-reflecting base body, and a light-reflecting body are also provided. The polyester resin composition characteristically contains 0.1 to 20 mass parts of (B) an inorganic filler having an average primary particle diameter of not more than 2.5 ?m, per 100 mass parts of (A) a resin component containing (A1) polybutylene terephthalate resin pellets and (A2) a polyester resin powder.

Abstract: A centrifuge, in particular a separator, includes a rotatable centrifuge drum with a vertical axis of rotation and a non-rotatable fixed housing with a hood and preferably a solids collector. In the centrifuge, the housing, in particular the fixed hood and/or at least one other part of the housing, have at least one first inner wall and a first outer wall which delimit a first cavity. The cavity is at least partly filled with damping/insulation agents that are solid at a process or ambient temperature. A coolant that has a fluid form at a process and/or ambient temperature can be introduced into the first cavity filled with the solid damping/insulation agents.

Abstract: A reusable pizza container configured to enclose a hot pizza for temporary storage or transport and to prevent moisture from entering into the top, bottom or side surfaces of the pizza. The container has a lid, a removable Vapor Transport Mechanism, and a bottom. The lid facilitates convection heat flow and the flow of moisture along the interior sides of the lid. Raised radial ribs enable the lids to be stacked. The raised radial ribs in the lid have perforations to allow hot vapor to escape and minimize moisture within the enclosed area. The lid nests securely into the bottom to prevent dislodging of moisture during transport. The removable Vapor Transport Mechanism (VTM), a micromesh membrane that fits within the lid, allows vapor to pass upwards through the membrane but prevents moisture from dripping downwards onto the upper pizza surface.

Abstract: Food grade container with a double wall structure that provides the benefits of insulating the contents from the environment and also serving to enhance the structural rigidity of the item in use. Multiple cavities are formed between the two walls designed to contain an insulating air barrier. The geometric structure of the cavities enhances the structural integrity by providing support for each wall and cushioning movement in one or both walls when constructed of an elastomer.

Abstract: A tank for containing a fluid, such as fuel, oil or gas within a chamber. The walls of the chamber are partially defined by a rigid structure having an opening; and partially defined by an elastomeric diaphragm which is attached around its periphery to the rigid structure and covers the opening in the rigid structure. An attachment frame engages the diaphragm and the rigid structure, and extends around the periphery of the diaphragm. The attachment frame has a first portion which engages the diaphragm, and a second portion which is positioned outside an outer edge of the diaphragm and attached to the rigid structure.

Abstract: A plastic container is provided that includes a hollow body portion including a lower supporting base portion; a sidewall portion extending upwardly from the base portion; and a neck portion extending upwardly from the sidewall portion. The neck portion includes a support flange having an upper and lower surface, a tamper-evident formation, and a dispensing opening at the top of the neck portion. In an embodiment, the dispensing opening has an inner diameter that is at least 22 mm, and the vertical distance from the top of the dispensing opening to the lower surface of the support flange is 0.580 inches or less. A preform and method for making a container are also disclosed.

Abstract: The invention relates to a transport container which is made of plastic and has side walls which rise up from a bottom part and are reinforced on their outwardly facing surface by vertical and/or horizontal ribs which protrude from the walls and are characterized in that plates made of plastic filled with stiffness-increasing additives are applied to the outer side of at least two opposing side walls.

Abstract: The present invention concerns an injection-molded capsule for use in a food preparation machine, said capsule for use in a food preparation machine comprising: (i) a structure (1) with a lower side (2), at least three pillars (3) extending from the lower side and linked to a circular upper frame (4) which defines the surroundings of the capsule top side, the pillars (3) having cross-sections S1, S2 and S3, the lower side (2) being a solid wall that comprises a dispensing opening (5) and is centered across the vertical symmetry axis VSA of said capsule, and (ii) a label (6) attached to the outer surface of the lower side (2), pillars (3) and upper circular frame (4), thus forming an envelope that defines capsule side walls, characterized in that the injection point IP of the capsule is off-centered in the vicinity of said dispensing opening (5), opposed the pillar (3) having a cross-section S3 relatively to the axis VSA, and in that S1=S2 and S3>S1.

Abstract: A thermoplastic composition comprises, based on the total weight of the composition: 51-90 wt % polyester, 10-49 wt % ABS impact modifier; 0-20 wt % of multifunctional epoxy compound; 0-40 wt % filler; 0-2 wt % fibrillated fluoropolymer; and more than 0 to 5 wt % of a stabilizer composition. An article blow molded or injection molded from the composition has a multi-axial impact total energy from 30-100 Joules at ?30° C. and a ductility of more than 90%; a permeability of more than 0 and less than or equal to 1.5 g/m2-day to ASTM D 471-98 Fuel C, measured after exposure to ASTM D 471-98 Fuel C vapor for 20 weeks at 40° C.; an MVR of 1-20 cc/10 min., measured at 265° C.; a flexural modulus of greater than 1300 MPa; and retains at least 75% of its initial tensile elongation at break, after exposure to Fuel E85 for 28 days at 70° C.

Abstract: Provided is an food packing material, manufacturing method and mold thereof having hydrophobicity including a number of columns formed in one side of food packing material. The disclosure may provide food packing material, manufacturing method and mold thereof in which an amount of contents off a wall of the food packing material may be minimized by hydrophobicity.

Abstract: A lid for industrial or commercial large size solid waste containers has a ribbed single layer central portion and a peripheral edge having a hollow double wall boxed configuration. The lids have substantial symmetry so that the lids may be stacked and nested with alternate lids oriented in opposite front-to-back directions.

Abstract: A utility truck with arched reinforcing rods incorporated into the base of a plastic truck during molding. The reinforcing rods are held in place in a mold at a predetermined distance above the mold's inner surface by spacers attached to the ends of the rods. Plastic is molded around the rods, with more plastic provided below the rods than above them, so that, when the plastic truck is removed from the mold and allowed to cool, the plastic will contract to a greater extent than the metal rods, causing the base and the reinforcing rods to bow upward, creating a convex arch in the truck's base. The arch provides an inherently strong, bridge-type structure that substantially strengthens the load-bearing capability of the truck, yet requires less reinforcing material than conventional supplemental chassis structures. In another embodiment, caster base mounts are also molded into the bottom of the truck, providing a utility truck with a unitary chassis structure.

Abstract: Non-durable self-supporting flexible containers.

Abstract: A transport case 1 with hinged side parts 3, 4 made of plastic is provided, whereby the height of the hinged side parts 3, 4 is greater than 16 centimeters or the permissible load of the transport case is greater than 16 kg, and wicket-shaped hollow stiffening strips 11, 12 are present in the hinged side parts 3, 4. The stiffening strips 11, 12 formed by injection of liquid have a surface roughness that is less than 10 micrometers.

Abstract: A structure is injection molded onto a group of panels to form a container. The container has a tray and an injection-molded feature. The tray has a plurality of side panels that extend at least partially around, and at least partially define, a cavity of the container. The tray has a plurality of multi-part flanges with at least one of the multi-part flanges including a lower flange portion and an upper flange portion. The injection-molded feature has band that is injected molded onto the lower flange portion and the upper flange portion. An injection-molded strip extends along and at least partially defines the corner of the container. The strip extends downward from the inner portion of the band in the elongate corner of the container. A tool is also disclosed for forming the container.

Abstract: A crate includes a bottom, two end walls, and two side walls. At least one of the end and side walls comprises an inlet having a dimension allowing to introduce a predefined amount of cooling liquid into the interior of the crate.

Abstract: The present application is directed to a deodorizer that comprises a package comprised of a porous compostable material and a crushable compostable material within the package that releases a deodorant when crushed. The application further describes a deodorizer assembly comprising an attachment assembly for removably attaching a deodorizer to the interior of a garbage container. The application also discloses a deodorizer assembly comprising a garbage can liner and a crushable compostable material that releases a deodorant when crushed.

Abstract: Containers suitable for use in food cooking, food serving and food storing are disclosed.

Abstract: A flexible, silicone mold having a container and a peripheral rim that defines an opening to the container. Grasping zones are disposed along the rim and the grasping zones have sufficient dimensions to permit control of the geometry of the rim and also to permit control of the horizontal positions of the two grasping zones.

Abstract: A building design of container-drum is described that includes a lid (10) positioned at the top and at the base of a container-drum (20) and this lid (10) matches the shape of the container-drum's body (20) and has a surface with a circular projection (101) and an orthogonal projection of the rim (102) around the edge of the container-drum's body (20) and this surface (101) has a lowered hub (103) and concentric guides (104) in order to fit the fastening belts (30) and these concentric guides come off of the central hub (103), having cavities and spoked reinforcements (105) set in between the guides (104) with the lid (10) having rims on the top surface with a beveled region (106).

Abstract: An elastomeric dispensing container for a fluid includes an elastomeric receptacle defining a chamber therein and having an integrally formed gasket extending radially from an opening formed on a lower end and a receptacle neck providing communications between the chamber and the opening, a relatively rigid sleeve disposed concentrically about the receptacle neck having a sleeve neck with a lower face adjacent to the integral gasket, a cap having a lid covering the receptacle opening and the integral gasket with a dispensing orifice formed therein and a cap neck extending from the lid disposed concentrically about the sleeve neck, and engaging means formed on the sleeve neck and the cap neck providing removable attachment therebetween wherein the engaging means secures the integral gasket in a compressed and substantially fluid-tight state between the lid and the sleeve lower face.

Abstract: An elastomeric dispensing container for a fluid includes an elastomeric receptacle defining a chamber therein and having an integrally formed gasket extending radially from an opening formed on a lower end and a receptacle neck providing communications between the chamber and the opening, a relatively rigid sleeve disposed concentrically about the receptacle neck having a sleeve neck with a lower face adjacent to the integral gasket, a cap having a lid covering the receptacle opening and the integral gasket with a dispensing orifice formed therein and a cap neck extending from the lid disposed concentrically about the sleeve neck, and engaging means formed on the sleeve neck and the cap neck providing removable attachment therebetween wherein the engaging means secures the integral gasket in a compressed and substantially fluid-tight state between the lid and the sleeve lower face.

Abstract: A thermoplastic composition comprises, based on the total weight of the composition: 51-90 wt % polyester, 10-49 wt % ABS impact modifier; 0-20 wt % omultifunctional epoxy compound; 0-40 wt % filler; 0-2 wt % fibrillated fluoropolymer; and more than 0 to 5 wt % of a stabilizer composition. An article blow molded or injection molded from the composition has a multi-axial impact total energy from 30-100 Joules at ?30° C. and a ductility of more than 90%; a permeability of more than 0 and less than or equal to 1.5g/m2-day to ASTM D 471-98 Fuel C, measured after exposure to ASTM D 471-98 Fuel C vapor for 20 weeks at 40° C.; an MVR of 1-20 cc/10 min., measured at 265° C.; a flexural modulus of greater than 1300 MPa; and retains at least 75% of its initial tensile elongation at break, after exposure to Fuel E85 for 28 days at 70° C.

Abstract: A fitting 5 forms of a fluid-conducting connection in an opening in a plastic wall 3 of a container 1, a tank in particular, for receiving a fluid, a hydraulic fluid in particular. The fitting has a connecting element 17 embedded on the edge of the opening in the plastic of the wall 3 of the container and provided with fasteners 15 accessible from the exterior of the container 1 by which a connection part 11 of the fitting 5 may be mounted on the connecting element 17.

Abstract: A box includes a base having a substantially rectangular perimeter. A pair of side walls and a pair of end walls extend upward from the perimeter of the base to form a box bottom having rounded corners and vertices. The box bottom includes a mouth at the top thereof. The mouth has a substantially rectangular perimeter. Reinforcing ridges are formed at the corners and vertices of the box bottom, and a lip formed at the perimeter of the mouth. A lid fits over the mouth of the box bottom. The lid includes a collar having a cuff that engages the lip to hold the lid in position over the mouth of the box bottom. At least one air hole is formed in the base and in the lid. A plurality of inwardly protruding panels is formed in the lid and in the base and walls of the box bottom.

Abstract: A container that is used as a mobile workspace for both civilian and military applications. At least one flat-shaped structural element of the container, e.g., the interior or the exterior wall, the floor or the ceiling, includes surface layers with sandwiched insulation material, and rib-shaped spacers between the two surface layers. According to the invention, the two surface layers, as well as the rib-shaped spacers, may consist of fiber-reinforced plastic material, and the rib-shaped spacers hold a metal profile.

Abstract: Box apparatus is provided for containing a pool cover assembly to cover a swimming pool, comprising an elongated plastic box. The box apparatus comprises a plurality of sections of substantially identical unitary molded plastic members, a plurality of coupling elements to couple the sections together to form an elongated box with two sides, a bottom, an open top and at least one open end, and an end piece fastened to the box to close the open end. A method is provided for forming a pool cover box to contain a pool cover assembly for covering a swimming pool, comprising forming an elongated plastic box.

Abstract: A container assembly includes a container body formed of a thermoplastic material having an inner surface, an outer surface, and at least one corner having a reinforcement molded to the outer surface of the corner. The reinforcement has a peripheral edge, which is partially embedded in the outer surface of the container body. A method of making a container assembly comprises the step of molding a container body over a portion of a reinforcement. A reinforcement having a peripheral edge is disposed in a mold. A fluid thermoplastic material is disposed into the mold. The thermoplastic material is then molded over the inner surface of the mold and the peripheral edge of the reinforcement thereby forming the container body. The thermoplastic material contacts the peripheral edge and melts or softens the edge. A peripheral edge is then brought into engagement with the container body to provide a secure seal between the reinforcement and the container body.

Abstract: A method for storing nuclear fuel in a container (10) including a concrete body and a fuel receiver embedded in the concrete body, comprises the steps of: providing formwork (62) for the concrete body and supporting the fuel receiver within the formwork; placing the formwork in an immersed position in a pool (54) containing a body of water; placing concrete in the immersed formwork (62); and removing the formwork with the concrete body cast therein from the pool (52).

Abstract: A device (10) for storage of hazardous material, especially heat-producing hazardous material, such as radioactive spent nuclear reactor fuel, comprises a substantially cylindrical reinforced concrete body (12) and has an axially elongate storage space (18) for the hazardous material. A prestressed reinforcement (17) having reinforcing members (28, 29) extending helically about the storage space (18) is provided in the concrete body (12) adjacent to the outer side thereof. Preferably, the reinforcing members (28, 29) are divided into two groups, one inside the other, the hand of the reinforcing members (28) of one of the groups being opposite to the hand of the reinforcing members (29) of the other group. Also preferably, the ends of the concrete body are provided with end covers (15, 16) in which the reinforcing members (28, 29) are anchored.

Abstract: An integrated engineering analysis system that determines at least one final output value in response to at least one initial input value. A first subprocesses provides at least one output value in response to the initial input value. A plurality of subprocesses provide a plurality of output values in response to the output values of the first subprocess. The plurality of output values and the output value of the first subprocess are inputted into at least one of the plurality of subprocesses. A command code executes each of the plurality of subprocesses in response to the output values and determines which one of the plurality of subprocesses to run and a final subprocess provides a final output. The final output is the result of a plurality of calculations executed by the plurality of subprocesses and the command code compares the final output with the initial input.

Abstract: The present invention aims to reduce the manufacturing work load of a structure of a liner of a concrete wall. A plurality of liner anchors 10 is constructed longitudinally to one surface of a liner 11, and a plurality of flat bars 14 is constructed transversely to the other surface of the liner 11. Concrete for a reinforced concrete wall is installed using the liner 11 reinforced longitudinally and transversely by the liner anchors 10 and the flat bars 14 as a formwork, and the liner is constructed to the concrete wall by burying the liner anchors 10 to the concrete wall. Thereafter, the flat bars 11 are removed from the liner 14, according to need.

Abstract: A method of producing a generally tubular, reinforced, structure including an inner layer of braided material having a predefined indentation configuration, the method including the steps of providing a mandrel having a shape and configuration of indentations corresponding to the shape and indentation configuration of the inner layer, providing a plurality of support members in the vicinity of at least some of the indentations on the mandrel, the support members protruding a predetermined distance radially outwardly from the mandrel, depositing the inner layer over the mandrel and the support members, and removing the support members to a position in which the support members do not protrude the surface of the mandrel.

Abstract: A container assembly includes a container body formed of a thermoplastic material having an inner surface, an outer surface, and at least one corner having a reinforcement molded to the outer surface of the corner. The reinforcement has a peripheral edge, which is partially embedded in the outer surface of the container body. A method of making a container assembly comprises the step of molding a container body over a portion of a reinforcement. A reinforcement having a peripheral edge is disposed in a mold. A fluid thermoplastic material is disposed into the mold. The thermoplastic material is then molded over the inner surface of the mold and the peripheral edge of the reinforcement thereby forming the container body. The thermoplastic material contacts the peripheral edge and melts or softens the edge. A peripheral edge is then brought into engagement with the container body to provide a secure seal between the reinforcement and the container body.

Abstract: Container for holding concentrate. The container is made from a plastic material and has a front wall, two sidewalls and a rearwall. The frontwall is smooth within the container and assists in separating the concentrate from the container when the concentrate is dumped from the container. The rearwalls and the sidewall are stepped about their circumference to enhance the strength carrying capacities of the container. A floor area has a forklift so as to allow lifting and rotation of the container so that the concentrate may be dumped from the container over the smooth inside of the front wall.

Abstract: A method of rotationally molding a part to include a platform therein is provided. The method includes providing a mold and mounting the platform adjacent to, and preferably connected to the wall of the mold. Resin is deposited in the mold and the mold is closed. The mold is heated and rotated around at least two axes. The molten resin substantially covers the interior wall of the mold and the portion of the platform exposed therein. Rotation continues as the mold is cooled whereby the resin solidifies into a self-sustaining configuration. The resulting part is removed with the platform receiving resin thereon incorporated in the part resulting in a reinforcement oriented in spanning relationship to an interval defined by spaced-apart regions on the mold wall. The placement of the platform may be selected, whereby the resin and platform provide structural reinforcements for the part, lifting points incorporated into the part, or electrical grounding sites which are formed during molding.

Abstract: A glass fiber capable of withstanding temperatures in excess of 1900.degree. F. is produced by treating a glass, preferably E-glass, fiber. The glass fiber is first leached with selected acids, and then the leached fiber is treated with organo-metallic materials of low viscosity, such as a dispersion of low molecular weight water-in-oil emulsion of dimethyl polysiloxane. The fiber is used in such applications as embedding it in a fire-resistant active coating material or embedding it into one surface of a polyolefin or composite plastic, such as a polypropylene sheet. The treated fiberglass can be used as a sole component or in concert with a fire-resistant or fire retardant material to further enhance its fire-resistant properties.

Abstract: A cargo container wherein at least two walls adjacent to each other are constituted using an integrally formed FRP panel, and a cargo container having a sandwich panel including a core and FRP skins as a main rigidity-maintaining member and wherein at least two walls adjacent to each other are formed integrally. The cargo container according to the present invention is light and has sufficient strength and rigidity as compared with a conventional aluminum-alloy container, and can reduce time and cost required for fabrication and production thereof. Further, the cargo container constituted using the sandwich panel including the core and the FRP skins has excellent freezing, refrigerating, cold insulating and heat insulating performances.

Abstract: A storage container (2) having secondary containment venting by form of construction includes an primary container (4) defining a primary containment region (24), a secondary container (6) and an interstice (8) therebetween. A portion of the top (16) of the secondary container is weakened so that in the event of an overpressure within the interstice, the weakened region fails allowing the overpressure to be vented to atmosphere. Two bands (34, 36) of fluid-accepting and -conducting material are wrapped at an angle to one another around the primary container within the interstice. The bands of material help to ensure that any overpressure within the interstice is substantially equalized throughout the interstice so that if the secondary container does fail, it fails at the weakened region.

Abstract: A storage unit, in the category of a cabinet, bookcase, locker and cubby, as provided which includes a frame defining top, bottom, and side walls to the storage unit. At least one shelf member and at least one shelf supporting member are received in the frame to divide the frame into separate storage cubicles or lockers. The frame is made from two blanks. A first blank forms the top and at least a part of the sides. The second blank forms at least a part of the bottom and may form a part of the sides. Each blank, as well as the shelves and shelf supports, are made from a core having upper and lower surfaces which are covered with a coating. The coating extends beyond edges of the blanks to define a channel which receives a finishing piece. Grooves are formed in the top blank to define bending points and separate the what will be the top of the frame from the sides of the frame. Shallower grooves are formed in the first and second blanks and define one guide channels for the shelves and shelf supports.

Abstract: A material handling container (10) of the type for packaging, shipping and inventorying goods and of the type for stacking one upon the other when not in use, made of molded thermoplastic and having a plurality of plastic reinforcement members (86) arranged in predetermined positions about the plastic planer expanses (84) of the container (10) for adding strength and stiffness. The reinforcement members (86) define a plurality of hollow channels (88) disposed adjacent to the planer expanses (84) of the container (10) and including at least one rib (90) extending upwardly from the channel (88) defined by the reinforcement member (80) for adding strength and stiffness to the planer expanse (84) of the container (10).

Abstract: Multi-walled panel-like structure having an upper and lower wall integrally bonded to support ribs located therein between with closed cell foam being placed in the interstitial spaces between the walls and ribs. Improved strength is provided by this apparatus and method of construction. The invention is particularly suited for retrofitting single wall tanks and tank bottoms to be double walled tanks and tank bottoms.

Abstract: A double-walled fiberglass reinforced resin underground storage tank including a generally cylindrical inner wall having a plurality of circumferential support ribs bonded thereto, at least one spacer filament mounted on the outer surface of the inner wall of the tank over a substantial portion of the length of the tank, and an outer wall substantially conforming to the contour of the inner wall and the support ribs but not adhered to the inner wall or the support ribs. The outer wall cures into relatively tight conformance with the inner wall and support ribs resulting in a reduced annular space between the walls. Small voids are created immediately adjacent to the spacer filaments, providing fluid passageways which enhance the otherwise slow migration of fluid in the annular space.

Abstract: A mortar mixer having a generally cylindrical, horizontally disposed, pivotally supported mixer drum constructed of plastic material and more specifically to improvements in the form of metal end plates attached to and rigidifying the plastic end walls of the generally cylindrical drum. The metal end plates are associated with the end walls of the plastic drum in a unique manner to reinforce and support the end walls of the plastic drum in order to provide adequate support for maintaining the shape and configuration of the generally cylindrical plastic drum during the entire procedure of placing materials to be mixed in the drum, mixing the materials and dumping the mixed materials from the drum.

Abstract: A module for the storage of nuclear waste packages from a nuclear power plant is disclosed comprising a concrete precast container with sidewalls and a bottom, a concrete precast lid removably disposed on upper edges of the sidewalls to close the container, and a cylindrical one-piece seamless liner abutting and covering the interior surface of the container. The liner is provided with anchor elements formed integral with the liner that extend along outside surfaces of the liner sidewalls and bottom wall, and the anchor elements are embedded within the concrete precast sidewalls on the container. The anchor elements are provided by a plurality of ribs which can be T-shaped or dovetail shaped in cross-sectional area and may extend either longitudinally or circumferentially about the liner.

Abstract: Improved multi-wall containers and pipes for transporting fluids which have to be protected against leakage and mechanical forces, have an inner and outer wall separated by a continuous foam layer integrated into the containers. Improved strength and resistance to axial inertial pressure is provided by the method of manufacture using chopped glass fibers, continuous windings of glass fibers and suitable polyester resins and circumferential ribs spaced at stress points and integrally incorporated into the containment walls. Vessels produced according to the methods of the invention have a moment of inertia strength of about 4.67 in.sup.4 substantially eliminating torquing, buckling and rupture.

Abstract: A large plastic refuse container including a floor, a front wall, a rear wall, a first end wall, a second end wall and a floor. The plastic refuse container including two attached and opposing side fork pockets to enable the lifting of the container with a fork lift device.

Abstract: A single reel data tape cartridge includes a base and a cover. The base includes a rear wall, two opposing side walls, a front wall, and a lower wall connecting the rear, front, and side walls. The lower wall has an outer surface and an inner surface. A strengthening rib is formed on the inner surface of the lower wall adjacent each of the four corners of the base. The portion of the lower wall on one side of and adjacent the strengthening rib has a groove extending along the length of the strengthening rib. The groove and the adjacent strengthening rib share a common wall.

Abstract: Improved multi-wall containers and pipes for transporting fluids which have to be protected against leakage and mechanical forces, have an inner and outer wall separated by a continuous foam layer integrated into the containers. Improved strength and resistance to axial inertial pressure is provided by the method of manufacture using chopped glass fibers, continuous windings of glass fibers and suitable polyester resins and circumferential ribs spaced at stress points and integrally incorporated into the containment walls. Vessels produced according to the methods of the invention have a moment of inertia strength of about 4.67 in.sup.4 substantially eliminating torquing, buckling and rupture.

Abstract: Improved multi-wall containers and pipes for transporting fluids which have to be protected against leakage and mechanical forces, have an inner and outer wall separated by a continuous foam layer integrated into the containers. Improved strength and resistance to axial inertial pressure is provided by the method of manufacture using chopped glass fibers, continuous windings of glass fibers and suitable polyester resins and circumferential ribs spaced at stress points and integrally incorporated into the containment walls. Vessels produced according to the methods of the invention have a moment of inertia strength of about 4.67 in.sup.4 substantially eliminating torquing, buckling and rupture.