Abstract: A sewn polyolefin in fabric bag which uses the molded shapes of the polyolefin material to form a shaped enclosure. Enclosure means and a fabric hinge are sewn directly to the polyolefin enclosure means to form the completed bag. The bags formed in this manner have many of the advantages of both soft and hard shelled bags. The polyolefin material is capable of providing a predetermined shape but has a soft exterior surface and is deformable. Sewing can be done using conventional sewing techniques. Polyolefin materials have not previously been usable in this manner because of their inability to bond or weld in reliable manner to other materials.

Abstract: A method for encapsulating an electrical component or forming a resin based filler reinforced composite article which comprises providing a rigid mold having a cavity and an opening in one surface of the mold connected to the cavity, and a chamber in which the mold is placed for applying heat and varying pressure to the mold contents. The chamber is preheated to the curing temperature of the resin and is maintained at this temperature. The component or filler is loaded into the mold cavity and the mold is placed in the preheated chamber. Then the mold cavity is filled with a low viscosity heat curable, thermosetting resin such as an epoxy resin. Next, the mold cavity is evacuated to a subatmospheric pressure to impose a vacuum on the mold to impregnate the component or filler with the resin, degas the mold cavity contents, and expand any voids in the resin. The vacuum is released to atmospheric pressure to collapse any gas bubbles remaining in the mold contents.

Abstract: A method of high-speed spinning polyamidic fiber, comprising the steps of extruding the polymer in the molten state, cooling the filaments by blowing, and finishing, which is performed in two stages, one upstream and the other downstream of the interlacing device.The latter device includes a containing enclosure wherein the interlacing nozzle and at least two pairs of yarn thread guides are accommodated.Fibers obtained with the method have 5 to 29 knots per meter.

Abstract: The invention is concerned with the technical field of food article processing, and in particular relates to a method for shaping ice creams and articles of creamy consistency.The technical problem to be solved was that of quickly and accurately shaping articles of a creamy type with the same already provided with volume and consistency features which substantially approximate the final ones.The solution to the problem is provided by a method comprising at least one shaping step carried out by applying to said articles at least one air-pervious die and simultaneously blowing in air through said die.

Abstract: Method for removing protruding reinforcing fibers from the flash area of a deflashed, fiber reinforced plastic article are provided. The method features melting the protruding fibers off of the article without damaging the article itself. The apparatus features an elongated chamber for receiving the articles, means for passing the articles in series through the chamber, means for heating air to a temperature of at least about 800.degree. F. (427.degree. C.), and means for directing the heated air across the articles one at a time while the articles are passing through the chamber.

Abstract: Apparatus and method are provided for straightening a parison tube (58b) in an apparatus of the type in which thermoplastic tubing (48) is extruded into open halves (24 and 26) of a blow mold (22) and a parison tube (58b) is severed from the thermoplastic tube (48) concurrently with the blow mold being rotated around an axis (28). The present invention orients the curvature of the parison (58b) in a predetermined plane (52) by accelerating the parison tube (58b) transversely to the axis (90) of the parison tube (58b); and then the parison tube (58b) is straightened by applying jets of air (76) against the neck and moil portion (68) of the parison tube (58b), thereby straightening the parison tube (58b), and thereby preventing the neck and moil portion (68) of the parison tube (58b) from being pinched between the mold halves (24 and 26) in the area of the neck and moil cavity (38).

Abstract: A device for shaping ice cream into shaped articles, comprising extruder members (2) to deliver an ice-cream blank (3), cutter members (10) to subdivide the blank into a plurality of slugs (13) and conveyor for transporting the slugs (13) while being carried by trays (9) to a molding device (1). The molding device (1), which shapes the slugs of ice cream on the trays, comprises operative members (22, 23) to supply compressed air and at least one forming unit (15). The forming unit (15) includes an air pervious contoured die (16), formed by a porous material with a substantially uniform thickness, drive elements (19) for moving the die (16) toward the slugs of ice cream to be shaped, and walls defining an internal chamber (18) supplied by compressed air by the operative members (22, 23) and in communication with the die (16), to realize a uniform distribution of compressed air and a thin gap of air between the total surface of the shaped article and the surface of the die (16) facing the shaped article.

Abstract: The method of consolidating a metallic, metallic and ceramic, or ceramic body in any of initially powdered, sintered, fibrous, sponge, or other form capable of compaction, includes the steps:(a) providing a bed of flowable particles within a contained zone, said particulate primarily including flowable and resiliently compressible carbonaceous particles,(b) positioning said body in said bed,(c) and effecting pressurization of said bed to cause pressure transmission via said particles to said body, thereby to compact the body into desired shaped, increasing its density,(d) said body and bed being at elevated temperatures prior to said pressurization step.

Abstract: The lens is molded in a rotating concave lens mold. Liquid lens monomer is placed in the concave mold and a controlled stream of gas from a narrow opening extending across the lens and positioned over the lens center shapes the concave surface to a toric. The lens mold and the gas nozzle rotate in synchronization until the lens monomer is polymerized.

Abstract: A method of making an orificed discharge wall for supplying a plurality of streams of molten glass to be attenuated into filaments is provided comprising inserting elements in apertures in a member; positioning said elements and member within a thin walled elastomeric sheath adapted to isostatically transmit pressure to said elements and member; applying isostatic pressure to the sheathed elements and member to mechanically seal the elements to the member; and fusing the mechanically sealed elements and member together to prevent the unwanted passage of molten glass between said elements and said member, said elements having an orifice to permit the passage of molten glass therethrough to establish said streams.

Abstract: Sheets of incompletely fixed biological tissue comprising portions for defining valve flaps of a cardiac valve prosthesis are mounted on forming means which can separate in a substantially fluid-tight manner the opposite faces of such portions. These opposite faces are subjected to a fluid pressure difference which produces deformation of the portions towards a conformation substantially identical with the conformation of the valve flaps when mounted in the prosthesis. The biological tissue is finally fixed while the portions defining the valve flaps of the prosthesis are maintained in the said conformation. The sheets of biological tissue are then separated from the forming means to be subsequently mounted in the frame of the prosthesis.

Abstract: In a method of making a fluted core radome from resin impregnated glass cloth, an outer skin, a fluted core, an inner skin, an edge band and a drain cap are individually fabricated from plies of resin impregnated glass cloth which are laid up on a mold and then subjected to pressure using a vacuum bag and to resin curing heat using an autoclave. The fluted core is formed on a mold having recesses in the surface thereof by placing silicone rubber mandrels within the recesses and on top of the plies of glass cloth, the mandrels tending to expand in response to the application of heat thereto and at the same time tending to contract in response to the application of pressure thereto so that an equilibrium is reached which provides a tight fit of the glass plies over the mold and a relatively even flow of resin within the glass cloth.

Abstract: In the production of polymeric foam in particular polyurethane foam slabstock, a mixture of foam reactants is allowed to expand in a closed mould while substantially atmospheric pressure is maintained above the upper surface of the foam. After expansion is completed, air is supplied to the foam upper surface and noxious gases in the foam are removed through one or more apertures in the lower region of the mould. Preferably, the air supplied is dry. Removed gases may be collected for re-cycling. Air may be supplied during foam expansion. Various mould aperture arrangements and means for progressively covering the mould are described.

Abstract: A polyvinyl alcohol alloy useful as a gas barrier material is prepared by reacting polyvinyl alcohol and a functional polymer to provide a product which has low gas permeability and water absorptivity characteristics, and which has a melting point sufficiently below its decomposition point to allow melt extrusion. The alloy may optionally be mixed with a polyolefin blending resin.

Abstract: Method for molding a pile fabric molding using an apparatus which incorporates a plurality of pin like members to allow the pile of the fabric being molded to pass therebetween while the pins contact the substrate of the pile fabric to maintain it at a position spaced from the mold member.

Abstract: A melt molding material which comprises a saponified product of a silicon-containing ethylene-vinyl acetate copolymer. When this melt molding material is formed into a sheet, said sheet is excellent in extensibility and thus suitable for deep forming. The decrease in gas barrier properties is small even under high moisture conditions, and its stress cracking resistance is excellent.

Abstract: A polyvinyl alcohol alloy useful as a gas barrier material is prepared by reacting polyvinyl alcohol and a functional polymer to provide a product which has low gas permeability and water absorptivity characteristics, and which has a melting point sufficiently below its decomposition point to allow melt extrusion. The alloy may optionally be mixed with a polyolefin blending resin.

Abstract: A method of making agglomerated cellulosic particles, particularly useful as a cat litter, comprises agglomerating a moist blend of fibers, aggregates of fibers, and/or fiber-sized pieces of a fibrous cellulosic material in a substantially horizontal rotating drum to form agglomerated particles; compacting surfaces of the particles; and drying the particles.

Abstract: A method of moulding a shaped article from a curable composition in which the composition is cured in a mould comprising at least two mould parts defining a cavity characterized in that prior to introducing the curable composition into the mould cavity, the pressure inside the cavity is increased above atmospheric pressure, preferably to at least 0.3 bar above atmospheric pressure, the dispersion is injected into the mould against this pressure and is subsequently cured. The method is useful for overcoming problems of color banding on the surface of the moulding which originate in the filling process and are particularly evident when high mould temperatures are used.

Abstract: Compositions are described, which are blow-moldable into shaped articles, comprising a reaction product between polycaprolactam, aminoalkyltrialkoxysilane and a catalytic amount of water. The compositions have a melt index of about 2.25 g/10 min. or below and are substantially free of trialkoxysilane groups. Preferred compositions also contain ethylene/vinyl acetate copolymer as an impact modifier to increase the impact strength of blow-molded articles made therefrom, such as bottles.

Abstract: A method and apparatus for pressure forming plastic pipe bells utilizing external air pressure is disclosed. The apparatus includes a horizontally oriented, shaped mandrel, which may or may not have expanding segments for forming an internal groove in the pipe bell, mounted within a pressure chamber. A natural rubber circular gasket is positioned at the front end of the pressure chamber and the end of the pipe is pushed through the rubber gasket and over the mandrel. A pair of cooperating upper and lower front plates are oppositely vertically reciprocal relative to the bell end of the pipe and act to retain the gasket when pressure is built up within the pressure chamber. Suitable air and water spray inlet and outlet connections are provided.

Abstract: A blank is formed out of plasticizable, heated plastic by means of an extruding-type material supply head. A somewhat lenticular profiling of the blank is obtained by appropriately controlling a closing member of the material supply head, which is built as a valve cone. When the closing member is closed off against the lower edge of a tube part of the material supply head, the blank is pinched off from the material supply. A flow of air emerging from a ring nozzle serves to ensure complete severance of the blank from the material supply head. After that has been accomplished, the blank enters an open shaping cavity of a die by free fall. By further movement of the die, which is located on a rotary table, the die removes itself from the permanently located material supply head, so that the blank lying in the cavity can be pressed into a molded article by a stamp. Cooling off too much in certain locations on the blank is prevented by the free fall of the blank into the shaping cavity.

Abstract: This invention is concerned with high density compacted and sintered polymer articles which previously could not be made entirely non-porous to liquid. It was inevitable, in an article with different parts, that frictional considerations in pressing one part would materially differ from those of another with the practical result that uniformity of density, throughout the article, could never be achieved. Fortuitously, for purposes of making various different parts of an article void free, the density values for each part need not be substantially all the same, but instead need only be raised above a predetermined threshold value.An object of this invention is the preparation of physically dense objects of sintered polymer with multiple parts, such as with abruptly varying cross section, which are uniformly void-free throughout, and of everywhere "theoretical" (reguline) density.

Abstract: Method for treatment of a solid material submerged in a body of liquid wherein the material is sticky and/or has relatively low tensile strength. The material being treated is supported, while so submerged, by a dynamic boundary layer of a liquid material between the treated material and a stationary porous restraining surface, the layer being created by the forced diffusion of said liquid through the pores of said stationary surface. The method is illustrated by heating and thereby foaming a strip of heat foamable thermoplastic resin while it is held submerged in a denser heat transfer liquid by a dynamic layer of said heat transfer liquid, said layer of heat transfer liquid being created by the forced diffusion thereof through a porous plate in operative communication with a pressurized chamber containing a supply of said liquid.

Abstract: There are disclosed film-forming polymer blends useful for the production of tubular blown film comprising EPM or EPDM elastomers, ethylene-vinyl acetate copolymers and a hydrocarbon oil plasticizer. The films exhibit resiliency and elasticity and high melt flow properties.

Abstract: An earth and sand conveyor system comprising a hopper adapted to receive dumped earth and sand, a trough connected to the hopper, a screw conveyor rotatably mounted within the hopper and the trough, a consolidating pipe connected to the trough, a molding pipe connected to the consolidating pipe, a conveyor pipe connected to the molding pipe, a first nozzle formed in the wall of the molding pipe, a second nozzle formed in the wall of the conveyor pipe, an air compressor connected to the first and second nozzles, and a directional control valve disposed between the air compressor and the first and second nozzles for alternately supplying the compressed air to the first and second nozzles.

Abstract: An insulating corrugated member is provided by two sheets having identical corrugations, at least one of the sheets being of a thermoplastic material and having its edges deformed, the deformed edges being adhesively secured to the other sheet. The edges of the thermoplastic sheet are deformed on a mold which is prepared by using, as a template, a sheet having identical corrugations by the application of heat and differential gas pressure to opposite sides of the thermoplastic sheet.

Abstract: Rubber-modified terpolymers of from 50 to 83% of a monoalkenyl aromatic monomer, from 15 to 30% of an unsaturated dicarboxylic acid anhydride, from 2 to 20% of an unsaturated nitrile are described which are useful as molding compositions.

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 process for reducing free acrylonitrile monomer in nitrile polymers during melting which involves having an effective amount of an unsaturated fatty acid or a glyceride of oleic, linoleic and linolenic acid or compounds such as safflower and linseed oils as an acrylonitrile scavenger in admixture with the polymer during melting. Shaped products such as preforms, containers, film, sheet, etc., formed from such melt are well suited for packaging food, beverages, pharmaceuticals, cosmetics, etc., in that residual acrylonitrile monomer in the walls of such products is minimal.

Abstract: A process of reducing free acrylonitrile monomer in nitrile polymers during conversion to melt form which involves having an effective amount of an acrylonitrile scavenger such as myrcene in admixture with the polymer during melting. Shaped products such as preforms, containers, film, sheet, etc., formed from such melt are well suited for packaging food, beverages, pharmaceuticals, cosmetics, etc., in that residual acrylonitrile monomer in the walls of such products is minimal.

Abstract: An extruder for feeding finely divided solids. And, in combination therewith, means for using gas in various ways to repulverize the finely divided solids. It lends itself to a procedure for continuously charging finely divided solids with water into a high pressure reactor. The high pressure is inherently contained, and the solids are repulverized for use in a reaction.

Abstract: As described herein, there is provided safety apparatus for continuous rotary blow molding machines of the type wherein the extruder operates independently of the machine to continuously extrude plastic tube through its die head during the interruption of operation by the blow molding machine. The safety apparatus includes a blow tube mounted on the extruder for directing air under pressure against the plastic tube to deflect the tube away from the molds of the molding machine upon interruption of the operation of the blow molding machine. A conveyor, operative at the same time as the blow tube and extending in a direction coincident with the direction of pressurized air, receives the diverted plastic tube and carries the plastic tube to a receptacle. The blow tube and conveyor remain operative at least until the machine is restarted.

Abstract: A process for reducing free acrylonitrile monomer in nitrile copolymers during melting which involves having an effective amount of an acrylonitrile scavenger selected from the group consisting of unsaturated fatty acid aldehydes, and esters formed by the reaction of a short chain olefinic alcohol with a fatty acid or cyanuric acid in admixture with the copolymer during melting. Shaped products such as pellets, preforms, containers, film, sheet, etc., formed from such melt are well suited for packaging food, beverages, pharmaceuticals, cosmetics, etc., in that residual acrylonitrile monomer in the walls of such products is reduced over that present in the absence of such a scavenger.

Abstract: An apparatus for forming articles of sheet material includes a chamber; a mold arranged in the chamber; a feeding device for intermittently advancing the sheet material into the chamber; a discharge opening in the chamber for removing therethrough the articles formed in the mold; a slide movable across the chamber and having an advanced position in which it closes the discharge opening and a withdrawn position in which it opens the discharge opening; a pressurizing device for generating a fluid pressure in the chamber in the advanced position of the slide for urging the sheet material into the mold; an arrangement for discharging the formed article from the chamber through the discharge opening in the withdrawn position of the slide; a piston movably received in the chamber for displacement towards and away from the discharge opening to assume an advanced and a withdrawn position, respectively; a seal carried on an end face of the piston oriented towards the slide; and an arrangement for moving the piston int

Abstract: Apparatus and method are disclosed for reducing the aging period of foams produced using a gaseous expansion agent. In accordance with the present invention the aging period for these foams is substantially reduced by subjecting the foam to pressure by a gas which is essentially inert with respect to the foam.

Abstract: A plastic tube is provided which has a main lumen, an auxiliary lumen, and an integral connector at one end for connecting the main lumen in fluid communication with another device. The auxiliary lumen extends longitudinally within the side wall of the tube with the integral tube connector free of the auxiliary lumen. The tube can be made by extruding thermoplastic material through a die having a hollow main lumen die pin and a hollow auxiliary lumen die pin adjacent the die outlet orifice. Air under pressure is supplied to both die pins to produce tubing extrudate having main and auxiliary lumens. The pressure of the air supplied to the auxiliary lumen forming pin is reduced at programmed intervals during the extrusion of the tubing so that selected portions are free of an auxiliary lumen or have a lumen of limited size. The tubing can be severed so that it has a selected portion at one end that can serve as an end connector.