Abstract: A tubular frame structure adapted for use as a tennis racket which includes an elastic polymer core which is bonded to and surrounded by a rigid shell of graphite composite. The elastic polymer core is a flexible vinyl foam prepared from plasticized polyvinyl chloride in which a suitable blowing agent is dispersed. A method for preparing the racket structure is disclosed.The elastic polymer core provides a particularly desirable core material which does not degrade or breakdown during prolonged use and provides enhanced racket shock and vibration absorption, and, most importantly, the means to obtain the desirable variable density characteristics at the desired locations within the structure of racquet without a corresponding reduction in structural capability.

Abstract: A foam article suitable for use as a seat cushion includes a supportive bottom layer of firm high density foam, a comfortable top layer of soft low density foam and a border or side wall of foam of intermediate density. The foam article has a sag factor of about 4.5 to about 6.5, and the foam layers and the side wall are bonded together without employing adhesives. A method of preparing the foam article also is disclosed.

Abstract: An inventive method for producing a laminated molded countertop includes the steps of placing the surface laminate material into a mold, applying a layer of polyurethane foam to an interior side of the laminate material, applying a reinforcing member, if necessary, on top of the layer of polyurethane foam, applying a second layer of polyurethane foam over the reinforcing member and closing the mold. A resultant molded article has an exterior surface laminated thereto due only to the forces generated by the polyurethane foam during the time when it is expanding and solidifying.

Abstract: An automatic foam dispensing system is described for forming shock-absorbing members of synthetic foamed material into predetermined shapes at pre-selected locations inside a container for the cushioning of articles to be provided therein. The foam dispensing system is generally constructed from a dispensing booth having a plurality of synthetic foam dispensing apparatus provided thereat and a plurality of mold assembles adapted for movement along a track to and from the dispensing booth.

Abstract: A hole, particularly an accidental perforation, is closed by manoeuvering a bladder (g) into the hole employing a hollow rod (f) on which the bladder is mounted at one end. An operator operating from the other end of the rod actuates a device such as a triggered valve to cause the components of a settable foamed plastics material to pass (via tubes b and rod f) from their sources (in a) to fill the bladder (g) so that it closes the hole. The settable foamed plastics material is preferably polyurethane foam. The bladder may be of natural or synthetic rubber and may be protected against tearing by a textile envelope. The sources of foamed plastics material may be either in a portable kit (a) or rupturable containers within the bladder (g) or rod (f).

Abstract: The invention relates to the preparation of molded polyurethane parts having a lightfast polyurethane skin. The skin is formed by applying a reaction mixture comprising an organic polyisocyanate, a polyol, a chain extender, an aliphatic primary or secondary aliphatic diamine, and a catalyst, by a one-shot process in the absence of solvents, to the inside wall of the molding tool.The molded parts produced in accordance with this invention are used, for instance, in the automobile industry for the inside equipment of vehicles. Specifically, they may be used as cover plates for steering wheels and for lining doors. They may also be used for external equipment such as bumpers, headlight housings, and may be used in the electrical industry as housing elements.

Abstract: A method and apparatus is provided for making a composite structural homogeneous resinous article having (a) a smooth, shiny non-cellular or homogeneous relatively thin injection compression molded liner on the outer surface and (b) a cellular relatively thicker injection molded core integral with the molded liner. One extruder is connected by valve controlled passages to a pair of injection devices, each device having an injection chamber. One chamber stores the homogeneous plastic resin and the other chamber stores the foam plastic resin. A first mold assembly having a movable upper mold part and a stationary lower mold part form a cavity, with a gap opening, at a first molding station. The cavity is in communication with the first injection chamber.

Abstract: A sewer pipe, transport pipeline, or other circumferentially enclosed passageway is lined by inserting into and along it a flexible tubular material of given diameter, with its corresponding circumference being less than the inside perimeter of the passageway. The tubular material is a laminate having a dimensionally stable skin layer facing the interior of the passageway and a contiguous layer of a composition foamable to form an expanded cellular structure. After insertion of the tubular material the contiguous layer is foamed to expand cellularly so as to fill the space between the inner skin and the inside wall of the passageway and to solidify in place. The tubular material may have an expansible outer skin layer also.

Abstract: A process for fabricating hollow, foam-filled, reinforced plastic objects such as surfboards. The process involves disassembling a multi-part mold to expose its inner surface. The inner surface is then coated with a gel coat, resin and reinforcing material and assembled into two mold halves. A prefoam material is injected into each mold half which is then capped with a baffle. The foam is then permitted to rise, and a portion of the foam is forced through the baffle. The baffle is then removed and a certain amount of the foam is removed. The two mold halves are joined and a center joining resin is poured in this depression and allowed to cure.

Abstract: An apparatus for manufacturing insulating construction profiles having two metal profiles spaced from each other to define a channel filled with an insulating compound includes a supporting table to support a plurality of metal strands successively positioned in advanced movement along the table by transport rollers. Each strand includes a pair of metal profiles spaced from each other and connected with a temporary bridging strip in their advancing path. A first pouring device is positioned in the path of the advancing profiles to fill an insulating material into the channel between two metal profiles in each strand to form a first insulating core and a second pouring device is provided to introduce insulating material into the same channel to form a second insulating core. Between the two pouring devices a strip supply roll, a guide arrangement and a pressure roller are arranged to apply a separating strip between the two insulating cores which is vertically spaced from the temporary bridging strip.

Abstract: A process using a mold having at least two complementary parts provided with internal surfaces defining a molding cavity, including placing a cover element on the internal surface of each mold part, extending the periphery of the cover elements beyond that of the internal surfaces, pouring a foaming composition undergoing reaction onto the cover element of one of the mold parts, waiting until the foam further expands and overflows slightly from the part of the mold into which it was poured, applying the other mold part to the first one so as to close the molding cavity, pressing the overflow foam into the extended cover elements, waiting until the foam fully cures, removing the padding from the mold and trimming the cover elements along the line joining them.

Abstract: A select, low density semi-flexible foam polymer composition is prepared from a very select reaction mixture which is characterized by a foaming agent which consists essentially of water and is substantially free of fluorinated hydrocarbon compounds, and a relatively low reaction mixture NCO/OH index of from about 20 to about 70. The foam polymer composition is particularly useful in packaging fragile or shock-sensitive objects.

Abstract: A method of filling a cavity in a building block with aminoplast resin foam comprises locating a template (6,7) against and in sealing relation to that face of the block having said cavity opening therefrom characterized in that an aperture (5) defined in said template and at least as large as the opening in the block which communicates with the cavity is aligned and registered with said opening, followed by passing curable aminoplast resin foam into the cavity under pressure to fill said cavity and form an upstand (9) of foam relative to the face of the block in the space defined by the thickness of the template, and then removing the template to leave at least some of said upstand projecting from said face.

Abstract: A smooth, plastic-lined corrugated pipe having an intermediate layer of plastic foam. The pipe is made by internally coating a corrugated pipe with a foaming mixture and pressing an expandable cylinder of plastic sheet liner against the foaming mixture until the foam solidifies. An expandable mandrel apparatus presses the plastic sheet liner into position. The apparatus comprises a hollow cylinder, an elastomeric cylinder fitted on the outside of the hollow cylinder defining an annular space therebetween and a fluid conducting means communicating with the annular space.

Abstract: A tubular frame structure adapted for use as a tennis racket having a rigid outer shell of composite material and an inner reinforced foam core including a foam portion and honeycomb reinforcement layers. The honeycomb reinforcement layers are oriented so that string holes passing through the frame pass through the foam core and rigid shell, but do not pass through the honeycomb layers. The use of honeycomb reinforcement layers is particularly well suited for use with elastic polymer foam cores.

Abstract: The cavity surface of a foam mold is sprayed with a paint which becomes integrally bonded to the outer surface of the foam molded part. The sprayed paint unavoidably overlaps the parting faces of the mold around the outer edges of the mold cavity. In order to avoid the necessity of trimming a paint flash from the molded part along a line corresponding to the parting line of the mold, after the cavity is spray painted and while the paint is still wet the line of intersection between the cavity and the parting faces of the mold is contacted with a member which interrupts the continuity of the paint film. This avoids the formation of the paint flash on the molded part.

Abstract: Composite bowling pins and baseball bats are formed with foamed, cured-in place plastic bodies securely adhered to a central aluminum core by a somewhat thermoplastic adhesive coating. The exothermic reaction attendant to curing the plastic so softens the adhesive coating that it does not interfere with shrinkage of the plastic body relative to the core. This minimizes stress concentrations in the composite construction which otherwise tend to lead to cracking in use.

Abstract: Articles having increased fire-retardant properties are obtained by surrounding a foraminous core having the desired product properties with an adherent protective layer of a hydrophilic polyurethane foam having large amounts of fire-retardant fillers. The core can be made of rigid, semi-rigid or flexible foams. Preferable cores include conventional bedding and cushioning materials. The protective layer can be sprayed or poured as a coating or molded on to the core.

Abstract: A method of manufacturing a thermally insulating sash bar from an elongated hollow metallic sash bar including a pair of spaced outer members connected by a pair of spaced first and second inner members so as to define between the outer members a pair of longitudinally extending first and second channels and a longitudinally extending hollow chamber. A mass of foamable and thermally insulating synthetic resin is introduced into the first channel and then cured to fill the latter with the cured or thermally insulating synthetic resin. Then, a longitudinal gap is formed in and along each of the first and second inner members. The longitudinal gap in the second inner member is covered with a thermally insulating strip. Finally, a mass of the foamable and thermally insulating synthetic resin is introduced into the second channel and then cured to fill the latter with the cured or foamed thermally insulating synthetic resin.

Abstract: A hand grip for a hand-held implement, e.g., a golf club, that consists of a rigid cap and a one-piece flexible foam tubular sleeve. The cap is structured to cooperate with the implement's handle shaft for locating and retaining the grip on that shaft, and for protecting the end of the shaft and the outer end of the foam sleeve. The one-piece flexible foam sleeve, preferably with an outer skin thereon to resist abrasion, provides a cushioned grip to the user. A novel method is also provided by which the rigid cap and foam sleeve grip are fabricated.

Abstract: A process for the production of foamed products from an unsaturated polyester resin composition, said composition comprising polyester resin, unsaturated monomer, a promotor, initiator, physical blowing agent, and compatible surfactant whereby a known gel time "T" results, foaming said composition by exposing it to microwave radiation prior to 1 T, thereafter permitting said foam structure to exotherm to obtain a fully cured product. Preferably the resin composition is exposed to the radiation between 0.2 and 0.7 T. Due to the foamed nature of these products, they will find many uses where insulation and light weight is important. End products include foamed unsaturated polyester resins and products incorporating the same such as patio blocks containing a polyester gel-coat, the gel-coat containing sand, decorative chips, or other decorative aggregate. The foam is a mixture of polyester resin and fillers and has a density of about 35 pounds per cubic foot.

Abstract: Disposable contraceptive intravaginal cervical barriers of one, two, three, four, or five layers in the form of standard pessaries with at least one layer impervious to the passage of sperm, with a medicament such as spermicide, germicide, or an abortion inducing agent either impregnated into a foam plastic layer or in the form of a layer of gel or powder, said medicament being activatable upon contact with an aqueous solution.Methods of producing disposable contraceptive barriers either as a wet foam plastic method wherein medicament is added to liquid foam and the resulting mixture is formed in a mold with any subsequent layers then added, or as a dry foam plastic method wherein layers including a layer of medicament in the form of a gel or a powder are superposed in sequence and formed in a die.

Abstract: A fiber reinforcement is positioned on the female part of a matched die, and a reactive foaming mixture of polyol and isocyanate is placed on the reinforcement, the male part of the die set being then closed on the female part so as to compress the reinforcement and holding the die parts together while the mixture's foaming reaction occurs. So that the reinforcement can comprise finer than usual individual fiber thicknesses and be compressed more than usual by closing of the die while still filling all the voids between the fibers of the reinforcement with the foam produced by the mixture's reaction, from 5 to 30% by weight of a neutral ester having a boiling temperature higher than the foaming reaction temperature of the mixture, is initially added to the mixture before it is placed on the reinforcement and prior to closing of the die.

Abstract: The invention relates to games racket frames which are made from reinforced plastics material and have a hollow construction. The particular construction and method of the invention enable a satisfactory hollow product to be made by an injection moulding technique instead of the more laborious technique of building a suitable reinforced hollow construction around a mandrel.The frame is a hollow injection moulding of reinforced thermoplastics material in which the walls (21A and 21B) at the outer and inner circumference of the head (21) are joined by support means (25) through which the stringing holes (23) pass. The support means are integrally formed during the moulding.The method of the invention involves the use of a fusible core (10) which is shaped to provide the desired moulding with support means and which is melted out after the moulding is formed.

Abstract: A molded polyurethane article consisting of a foamed polyurethane core and a polyurethane surface skin layer as molded together as an integral unit. The above polyurethane article is produced by forming the surface skin layer of a surface-forming polyurethane composition rendered thixotropic by adding an aliphatic or functionally equivalent primary diamine as one of active hydrogen compounds in the composition and the surface layer so formed is caused to be bonded to a polyurethane core upon foaming of a foamable polyurethane composition to provide an integral article.

Abstract: This invention discloses an improved method of producing fiber glass or fiber graphite reinforced racket frames in which a shell made of a plurality of layers of resin-impregnated oriented graphite fibers is squeezed during the heating period to contact completely with the inner surface of a mold cavity by means of two interior pressure separately generated by compressed air and a foamable elastomer or rubber composition wrapped within the shell.

Abstract: A method for the fabrication of high density smooth walled composite members laminated of resin impregnated fibers, and characterized by hydraulic pressure applied by a smooth surfaced core member comprised of noninterconnected cells subjected to heat and expanded thereby in opposition to a complementary mold with a lay-up therebetween simultaneously cured to establish a wall or skin of the product part formed thereby.

Abstract: A method for fabricating a cushioned bathroom article. A fiberglass-reinforced, polyester resin base is fabricated, preferably by a two-part mold resin injection process. A composite, flexible polymeric skin is fabricated in two steps. In the first step, a first layer of an appropriate resinous material is applied to a form which has a configuration generally complementary to the configuration of the base. A second layer of relatively dense, flexible skin foam is applied to the first layer while the first layer is still on the form. The base is assembled with the coated form so that a cavity is defined between the base and the composite skin, and a flexible cellular foam, preferably of polyurethane, is formed in the cavity by an in situ foaming process.

Abstract: A method of molding cloth. A special multi-layer cloth is first preheated and then drawn into a heated mold by means of a vacuum between the cloth and the mold. The cloth includes a fabric layer having a heat-fixable fiber, a polyurethane foam layer and a polyvinyl chloride film layer bonded together. The cloth is preheated to at least the greater of the set temperatures of the fabric layer and the polyvinyl chloride film. The mold is heated to at least the same temperature. After the cloth has conformed to the contours of the mold, the cloth is transferred to a cooler mold. The steps of heating the cloth in the mold and then cooling the cloth in the cooler mold sets the stitch of the fabric to the contours of the mold. Polyurethane foam may then be poured into the mold and allowed to expand to form a seat cushion or the like.

Abstract: A reaction injection molding process for producing a coated polyurethane part in which a liquid mixture of polyurethane reactants is injected into a mold where it is reacted and molded into a shaped part at elevated temperatures. The surface of the mold is coated, prior to molding, with a coating composition containing a polyurethane catalyst. The catalyst acts to bond the coating composition to the molded part so that the shaped part upon removal from the mold contains a firmly adherent coating of the coating composition.

Abstract: A method of preparing a cushion or like padded article comprising a plasticized vinyl chloride polymer cover filled with foam in which the cover is shaped and the foam prepared in situ within the cover, wherein a superior bond between the cover and foam is achieved by coating the interior surface of the cover prior to foaming with a primer composition comprising:(A) a latex of butadiene-acrylonitrile copolymer containing a hydroxyl or carboxyl group; and(B) a latex chosen from the group consisting of natural rubber, styrene-butadiene latex and mixtures thereof in an amount sufficient to promote bonding and wherein the weight ratio of (A) and (B) is from 4:1 to 1:4.

Abstract: A building block including at least one internal cavity is insulated by molding an insulating layer from expandable thermoplastic polymer particles, such as beaded polystyrene, to one or more interior surfaces of the cavity. The molding operation is carried out by positioning a male plug member within the internal cavity of the building block with at least one peripheral surface of the plug member spaced from at least one interior surface of the cavity to provide a peripheral compartment into which the polymer particles are directed for molding the layer. Thereafter, steam, under pressure, is injected into the peripheral compartment to cause the particles to expand and fuse together into an efficient insulating layer that is expanded into close conformity with the interior surface(s) of the cavity. During the steam injecting operation a positive inwardly directed external force is applied to external surfaces of at least two opposed walls of the block to counteract internal forces generated by the steam.

Abstract: An apparatus for forming seal liners of thermoplastic material within closure cap shells comprisies: a plurality of movable dies each having an inner die and an annular outer die both of which are movable up and down in relatively slidable relation with each other and arranged so that the inner die takes its lowermost position after the outer die has taken its lowermost position; means for restricting downward movement of the outer die so as to provide a constant clearance between its lower end and an internal surface of a cap shell to be worked with, so that an annular foaming chamber of a constant capacity is formed beneath the lower end of the outer die; and a plurality of gas discharging grooves are provided so as to be communicated with the foaming chamber.

Abstract: A process and arrangement for introducing a material such as a foam into automobile body cavities for at least one of noise insulation or increased rigidity. The cavities may be provided with open spaces or be adapted to only be partially filled with the foam. A bag is initially introduced into the cavity with the bag being provided with a filler opening. The volume capacity of the bag corresponds approximately to the volume of the automobile body cavity or a portion of the body cavity which is to be filled with the foam. A mixture of expandable components is introduced into the bag and, following an expansion reaction or a setting, the foam fully fills the bag.

Abstract: Ths invention relates to a method of making a foam-containing structure which includes placing and suitably retaining a respective shaped sheet in each of first and second complementary parts of an open mould. Each sheet includes at least one layer of fibrous material and on that face thereof remote from the respective mould part at least one filter layer. When the two mould parts are closed together a foamable material is introduced into a cavity formed between the sheets and is then caused to expand. Some of the expanding material passes through the filter layers into the fibrous material, the characteristics of those layers being so chosen as to produce a desired extent of penetration of the expanding material into the fibrous material.

Abstract: A process and mold for producing padded motor vehicle seat backs containing a metal framework surrounded by polyurethane foam in a plastic coating. The framework is inserted through a slit in the coating which is then sealed. Then the polyurethane foam is injected through a flexible filler neck into the coating and allowed to polymerize. After polymerization the filler neck is cut off. The framework may be contained in a plastic bag together with a relatively resilient foamed plastic body. The coating may be pressurized inwardly and pressure in the mold may be reduced during injection of the polyurethane foam. The mold comprises a pair of lateral mold parts and a central mold part together defining the mold cavity. The lateral mold parts are movable toward and away from the central mold part by hydraulic or pneumatic rams.

Abstract: A method of molding cloth. A special multi-layer cloth is first preheated and then drawn into a heated mold by means of a vacuum between the cloth and the mold. The cloth includes a fabric layer having a heat-fixable fiber, a polyurethane foam layer and a polyvinyl chloride film layer bonded together. The cloth is preheated to at least the greater of the set temperatures of the fabric layer and the polyvinyl chloride film. The mold is heated to at least the same temperature. After the cloth has conformed to the contours of the mold, the cloth is cooled in the mold. The steps of heating the cloth in the mold and then cooling the cloth sets the stitch of the fabric to the contours of the mold. Polyurethane foam may then be poured into the mold and allowed to expand to form a seat cushion or the like.

Abstract: An in-ground swimming pool which utilizes a relatively flexible, continuous sheet-like wall member in combination with a bottom construction which is formed from polyurethane foam. The polyurethane foam bottom is reinforced at the surfaces of concave curvature with rail-like concrete members to which the foam is bonded.Also disclosed is a method of forming the polyurethane bottom which consists of applying a relatively thin coating of polyurethane foam to the bottom excavation and immediately placing a sheet of polyethylene, 2 to 4 mils thick, over the foam before the foam has set, conforming and adhering the polyethylene sheet to the foam and earth surface. The final steps include applying a series of polyurethane foam layers by spraying over the polyethylene sheet to achieve a desired thickness. By following the procedures disclosed, the foam surface can be controlled to obtain the desired pool bottom smoothness.

Abstract: A vaginal cleaning device is made by introducing foamable reactants into a container which is closed with a closure member having an elongated handle integral therewith and extending into the container. The reactants are permitted to form a cured foam in the container surrounding at least a portion of the handle extending into the container and the gas generated is vented through a vent opening in the closure member.

Abstract: A panel comprising fillers embedded in a closed cell expanded phenolic resin is made by making a mixture, which is initially fluid, or phenolic resin, a hardening agent, a surface active agent and a porogenic agent, which has a boiling point above ambient temperature and below the polycondensation temperature of the mixture. This liquid mixture is mixed with fillers, for example balls or microspheres of glass or expanded material such as polystyrene. The resulting mixture is placed in a mould, only partially filling the mould, and heated progressively to a temperature in the neighborhood of the boiling point of the porogene agent, while evacuating the mould, and held at that temperature until the mixture has expanded to fill the mould. The temperature is then progressively increased to the polycondensation temperature to harden the expanded mixture.

Abstract: A method of constructing a water ski foot support results in a foot support with a tough vinyl backing and a soft cushion layer for comfort. First the backing is injection molded. During the injection molding, a raised rim is formed on the inner side of the backing. The backing is then supported in a horizontal position with its inner side facing upward. A plastisol resin is poured onto the inner side at room temperature. The backing and plastisol resin are heated, the heat causing the plastisol resin to change into a solid cushion layer, bonded to the backing.

Abstract: A structural and insulating panel for fabricating walls of buildings. A series of panels are interconnected into a wall at the job site and are thereafter filled with insulation by spraying liquid insulating material onto the panel-formed walls. The panels include meshes forming lateral surfaces, zig-zag wires joining the meshes together and webs and backings acting to contain the flow of liquid insulation as it is sprayed onto the walls. Conventional wall covering materials are applied over the hardened insulation, the lattice members acting as a lath. The processes of fabricating the panel and forming a wall with such panels are described.

Abstract: Manufacture of ornamental vehicle wheels wherein a mold surface of desired decorative contour is sprayed with one or more layers of a polyurethane reaction mixture and partially cured in situ. A steel wheel is then placed over the mold surface and a polyurethane reaction mixture which includes a foaming agent is poured into the mold cavity formed therebetween. The poured mixture is then cured and the layers are finish-cured in situ to form an integral ornamental elastomeric structure adhered to the wheel.

Abstract: A process for manufacturing artificial breasts uses a two-component silicone rubber composition capable of a cross linking addition reaction, has cups sheathed by plastic sheeting layers initially joined by welding except for one opening through which the silicone composition is introduced under pressure and then the composition is vulcanized and the opening closed by welding.

Abstract: Equipment and formulations for the filling of ordinary pneumatic tires with a polyurethane foam, whereby all types, sizes and pressure ratings may be accurately filled, matching the ride and handling characteristics and load-bearing properties of air-filled tires and providing longer wear for the tires while at the same time providing puncture and blow-out proof tires.

Abstract: Process is disclosed wherein plastic material is passed into a mold cavity; pressurizing fluid is injected into the plastic material under controlled pressure and at a controlled rate to cause the plastic material to flow out and assume the contour of the cavity, the gas pressure being maintained until the plastic material is self-supporting. The resulting article has an outer skin and a generally hollow center containing skin-connecting structural "webs".

Abstract: A method of molding cloth. A special multi-layer cloth is drawn into a mold by means of a vacuum between the cloth and the mold. The cloth includes a fabric layer, stitches of the fabric having never been thermally set, a polyurethane foam layer and a polyvinyl chloride film layer bonded together. After the cloth has conformed to the contours of the mold, the shape of the cloth is fixed to maintain the mold contours. To this end, the cloth may be heated, or polyurethane foam may be poured into the mold and allowed to expand.

Abstract: A process for manufacturing artificial breasts using a two component silicone rubber composition capable of a cross linking additional reaction, has cups sheathed by a plastic layer joined by welding and into which the composition is charged under pressure, and during the vulcanization the edges of the sheets are forced together and joined by welding and the protruding edge portion cut off.

Abstract: A method of molding cloth. A special multi-layer cloth is drawn into a heated mold by means of a vacuum between the cloth and the mold. The cloth includes a fabric layer having a heat-flexible fiber, stitches of the fabric having never been thermally set, a polyurethane foam layer and a polyvinyl chloride film layer bonded together. The cloth is heated to at least the greater of the set temperatures of the fabric layer and the polyvinyl chloride film. After the cloth has conformed to the contours of the mold, the cloth is cooled in the mold. The steps of heating the cloth in the mold and then cooling the cloth sets the stitch of the fabric to the contours of the mold. Polyurethane foam may then be poured into the mold and allowed to expand to form a seat cushion or the like.

Abstract: A method of making a gas delivery device in which a delivery conduit and a core are located in a vibratory mold, and refractory granular material with a binder are poured into the mold. The core is removed, and a porous element is inserted in the resulting recess. The assembly is then heat treated to form the completed device.The device is especially useful for degasifying aluminium, copper, and their alloys.