Abstract: A method and apparatus for producing light-weight construction panels having a cementitious core layer surfaced with a layer of reinforcing fabric bonded to the two faces of the core includes the use of slurry applicator having a supporting member and a doctor in addition to a moving carrier for the slurry coated fabric. The edges of the panel also are covered with the fabric and may be open mesh edges. Cementitious slurry, for example, portland cement slurry, is applied to the fabric by means of a supporting member over which the fabric is drawn and a doctor means adjustably mounted above the supporting member. The supporting member is of a non-base-reactive material such as polypropylene or stainless steel; the use of such a supporting member permits better application of the slurry to the fabric before placement of the slurry coated fabric on the moving carrier.

Abstract: The disclosure relates to a molding member, for instance for automobile front window plates, as well as a method of manufacturing such molding members. The molding member has a lip section in the form of a ridge which extends throughout the entire length. The lip section bears against the surface of the window plate along the upper portion to realize a flush outer surface between the upper edge of the window plate and the body panel, but is spaced therefrom along the side portions to define a weir. The weir can be formed by deforming a predetermined location of the ridge, and prevents flow of the rain water across the molding member to preserve the driver's or passenger's sight through an adjacent side window.

Abstract: A low cost drip irrigation line is made by molding a drip emitter having an elongated labyrinthine channel formed in the depth of the emitter body. A plastic film is extruded and passed through a film die with an air injection tube at one end forming a plastic film bubble. A feed tube sequentially feeds the emitters in series through the plastic film bubble and to the nip of laminating rolls for laminating the emitter to the plastic film bubble so that opposite wall portions of the plastic film are bonded to the opposite outer faces of the emitter. This encloses the labyrinthine channel and thereby forms a sealed labyrinthine passage.

Abstract: A process and apparatus for manufacturing a frame with a groove such as a molding for use with a panel such as a windshield of an automobile. The process includes the steps of preparing a dummy panel having an outer configuration and a thickness equal to those of the panel, and continuously moving an extrusion port of a molding die means along the peripheral edge of the dummy panel so that a molding product is continuously formed along the peripheral edge of the dummy panel. The molding product is stripped from the peripheral edge of the dummy panel to obtain the frame with a groove. The groove is closely engageable with the peripheral edge of the panel. The apparatus includes a dummy panel having an outer configuration and a thickness equal to those of the panel, molding die means having an extrusion port, and moving means for moving the extrusion port of the molding die means relative to the peripheral edge of the dummy panel.

Abstract: A thin-walled ferrocement product is formed from mortar supplied in a liquid or semi-liquid state, and a thin foraminous layer of reinforcement positioned centrally between the opposite wall surfaces of the product. The liquid or semi-liquid mortar is deposited in a uniform layer on a conveyor and the reinforcing material is positioned parallel to the lower surface of the conveyor. In a preferred embodiment, the material is maintained under tension at the desired position above the conveyor surface as the mortar is deposited onto the conveyor and flows through the foraminous reinforcing layer. The mortar is developed to a coherent plastic state before removal from the conveyor, preferably with the application of heat. The developed plastic material may be formed into various configurations, or may be maintained flat, while subjected to curing to a solid state. The developed plastic ferrocement material may be separated into convenient lengths for handling.

Abstract: A process for producing a rubber extruded article comprising a main body made of EPDM, by finishing the surface of the article with a cloth-like surface, by attaching cloth to a designated surface of the rubber substrate, said process comprisingforming the main body of an extruded article by extrusion while forming a first adhesive layer comprising a blended rubber composed of 40 to 80% by weight of NBR, 20 to 60% by weight of EPDM and 0 to 35% by weight of SBR, or a composition of the blended rubber on the designated surface of the rubber substrate,subjecting the main body of the extruded article to a vulcanization step, andthen pressure-bonding a long, narrow strip of cloth lined with a second adhesive layer of a thermoplastic resin to the first adhesive layer, and fusing the second adhesive layer together with the first adhesive layer by heating to cause the complete union of the strip of cloth to the rubber extruded article.

Abstract: Extruded thermoplastic members, particularly structural members, are reinforced by longitudinally extending pre-stressed elements, such as filaments or matting. The elements, while under tension, are drawn into an extrusion crosshead die forming the thermoplasatic member. The elements are fully imbedded within the thermoplastic material while under tension and curing of the thermoplastic material, and final curing of the tensioned reinforcing elements, if a thermosetting resin impregnated element is used, occurs while the elements are under tension, the material of the member and the elements intimately bond and the tension forces within the elements reinforce the member at the desired locations. The forming of the reinforced member is a continuous operation.

Abstract: A flexible composite material comprising a core composed of a blend of a thermoplastic resin fiber and a reinforcing fiber, and a flexible sleeve formed of a thermoplastic resin and surrounding the core is prepared by intermixing a thermoplastic resin fiber and a reinforcing fiber to obtain a core, and then extruding a thermoplastic resin over the core.

Abstract: A process for manufacturing stratified pieces, such as roof tiles and wall tiles, by sucessive and independent extrusion of mortars or concretes. In the process mortar is deposited on a limited part of the molds. The mortar is extruded and compacted, and some mortar is dislodged from cross strips in each zone of contact between two consecutive molds. Thereafter, complete sheets of mortar are shaped on the first layers, filling both the emptied cross strips and the limited sides, and lastly the thicknesses of the pieces are cut in their entirety in a vertical transversal plane at each zone of contact of the molds to form multiple layer tiles having homogeneous facing surfaces.

Abstract: Thin-walled catheters are provided which have an elongated fuseless polymeric tube that is made from a single tube of extruded polymer. The elongated fuseless polymeric tube includes a body portion that had been subjected to a high temperature zone in order to solid state polymerize and enhance the mechanical stability, burst strength and kink resistance of the body portion. Also included is a tip portion of the elongated fuseless polymeric tube which was subjected to a low temperature zone to retain the initial properties of extruded polymer.

Abstract: Electroweldable pipe sockets and fittings by forming a first tube being internally sized and cooled and on the outer side provided with a groove, having preferably a raised edge part, winding an electrical conductor in the groove, and the outer side of the first tube with electrical conductor is coated with plastics thereby maintaining the internal size of the first tube by internal cooling and sizing. In this continuous process the speeds of the first tube and of the continuous tube leaving the coating extrusion stage are equal. In the coating extrusion stage a negative pressure is maintained between the first tube and the coating to be applied.

Abstract: A reverse osmosis water purification module has an enclosed cylindrical housing in which at least twelve purification elements are mounted in a uniform, spaced parallel fashion. Each element consists of a long flat member having a thermoplastic sheet backing formed into a slightly curved cross section and having a semi-permeable membrane disposed thereon. The backing has three-dimensional porosity for purified water such that water passing through the membrane portion of the element travels along the backing member to an end. The ends of the module are mounted in a collection manifold which is sealed off from the remainder of the housing interior. A method of manufacturing the elements continuously is also provided wherein a continuous length of flexible backing material is fed sequentially through a heater, a forming die to impart a curved cross-section to the backing material, an extruder wherein membrane forming fluid is extruded around the periphery of the backing, a chill bath and a heating bath.

Abstract: A method of manufacturing soft tip catheters having inner rigid polymer layers and outer soft, pliable polymer layers. The method involves first extruding the rigid polymer at varying extrusion rates to form a cylindrical body having a depression at one or more prescribed locations. The outer layer is formed by extruding the soft, pliable polymer over the inner to fill in the depressions. The resulting cylindrical body is then cut to form individual catheters having soft tip as defined by a portion of the prescribed locations.

Abstract: A catheter fabrication method and apparatus. Two rotating contact rollers define a nip to engage a mandrel used in fabricating an elongated tubular catheter. The rollers pull the mandrel from the catheter as a retaining block prevents the catheter from moving with the mandrel. The rollers rotate in opposite directions and are driven by a variable speed direct current motor.

Abstract: A method of producing a reinforced rubber hose, including the steps of continuously extruding a long plastic mandrel from a plastic material and feeding the extruded plastic mandrel, extruding an unvulcanized inner rubber tube on the long plastic mandrel, forming a tubular reinforcing layer on the unvulcanized inner rubber tube, extruding an unvulcanized outer rubber tube on the tubular reinforcing layer, vulcanizing the unvulcanized rubber tubes, thereby preparing a long rubber hose formed on the long plastic mandrel, cutting the long rubber hose into short rubber hoses having a predetermined length, while concurrently cutting the long plastic mandrel into short plastic mandrels, removing the short plastic mandrels from the short rubber hoses, and crushing the short plastic mandrels into a starting form of the plastic material, and returning the starting form of the plastic material to an extruder for continuously extruding the long plastic mandrel.

Abstract: An elongate molding member for automobile body components and the like, as well as a method of producing such molding members are disclosed. The molding member (11) includes a core element (12), and a cover element (13) made of synthetic resin material co-extruded about the core element (11). The core element (11) has a strip-like ornamental portion (15) which is different in color from the synthetic resin material of the cover element (13) and is to be disclosed outside by removing a separable portion (18) defined by at least one longitudinal slit (17) in the cover element (13). The ornamental portion (15) of the core element (12) has a longitudinally variable width (W.sub.1, W.sub.2) to provide an aesthetically refined appearance and to thus satisfy various ornamental design requirements.

Abstract: A novel method of producing molding members for automobiles, formed at least partly of a synthetic resin material is disclosed. According to the method of the invention, synthetic resin material is extrusion molded into a continuous body with a substantially constant cross-section throughout the entire length thereof. A controlled amount of the material is removed from the predetermined location of the continuous body, synchronously with the extrusion molding of the material, such that the cross-section of the continuous body varies in the longitudinal direction of the body. The continuous body subjected to the controlled removal of the material is then cut into the predetermined length of the molding member.

Abstract: Long lengths of a heat-shrinkable sleeve for use in splicing electrical cables and the like are manufactured by providing an elongated impermeable core having a smooth outer surface, extruding an elongated sleeve around and in contact with the core, the sleeve having a smooth inner surface conforming to the outer surface of the core, and effecting an initial expansion of a portion of the sleeve to a larger diameter in an expansion zone so that the sleeve separates from the core and leaves a space between the sleeve and core. A fluid is introduced into the space under pressure via a fitting at the downstream end of the sleeve while continuously advancing the sleeve and core through the expansion zone. To begin the process, a permeable core is used, and the sleeve is extruded around and in contact with the permeable core.

Abstract: A method for enabling the cutting to size of a continuous extruded weather strip including an anchoring profile provided with internal longitudinal retaining ribs and a tubular sealing profile co-extruded with the retaining profile and having variable characteristics. In order to cut the weather strip in predetermined zones related to the variations in the characteristics of the weather strip during extrusion, at least one of the internal longitudinal ribs is at least partially omitted in sections spaced from each other according to the length of the pieces of extrusion to be cut to size, and the omitted sections are detected to provide corresponding signals to enable cutting.

Abstract: This invention relates to a process of making flat stock fibrous cellulosic food casings containing a low plasticizer level of between about 10 wt. % and about 17 wt. %, including at least about 9 wt. % polyol, both based upon the bone dry weight of cellulose in the casing, This process comprising forming a fibrous web into a tube, annularly extruding viscose onto the tube, passing the viscose coated tube through a regenerating bath, and incorporating water-soluble plasticizer into either or both the resulting cellulosic gel stock fibrous tube and the dried fibrous tube.

Abstract: A method is providing for making a thin-walled catheter of the type having a distal end adapted to be formed into a curve and guided through branching blood vessels or the like so that the catheter is provided with a two-layered tubular body portion having a rigid inner sheath and a flexible outer sheath, which may be radiopaque. The catheter exhibits excellent torque response and control while being especially thin-walled, thereby permitting minimization of the outer diameter size while providing excellent liquid flow rates therethrough and excellent strength properties. The tip portion is fuseless with respect to the rest of the catheter, the tip portion being an integral extension of the flexible outer sheath that is formed over a gap between lengths of the rigid inner sheath.

Abstract: A coextrusion head for producing a generally tubular elastomeric ply made up of first and second concentric tubular streams of elastomeric material having interposed, adjacent to their interface, a closely spaced array of parallel reinforcing elements wherein the coextrusion head includes a reinforcing element guide subassembly including a generally annular guide element as well as a mechanism for individually and independently directing and accurately positioning a circular array of uniformly spaced individual reinforcing elements.

Abstract: A thin-walled guiding catheter of the type having a distal end adapted to be formed into curved configurations and passed through branching blood vessels and the like is prepared with a three-layered tubular body portion having a lubricious inner sheath defining a lubricious guiding lumen, a rigid intermediate sheath, and a flexible outer sheath, which may be radiopaque. The distal tip portion thereof has a similar construction, but from which the rigid intermediate sheath is omitted. The guiding catheter exhibits excellent torque response and control while being especially thin-walled, thereby permitting minimization of the outer diameter size while permitting passage of an intravascular catheter and the like through its lumen.

Abstract: Encapsulation of electronic components.Method of encapsulating bare electronic components (11) present in the form of a continuous strip (12) and intended to be provided with envelopes (13, 14) of a defined form made of at least one plastic material (15), characterized in that by extrusion by means of an extrusion head (16) the plastic material (15) is given the profile desired for the said envelopes (13, 14), while the bare electronic components are continuously inserted and immobilized in the said profile, and in that in a final operation common sections of extruded plastic material (15) and of a strip (12) of components are cut so that the bare electronic components (11) thus provided with their envelopes (13, 14) are mutually separated.Application in the manufacture of display elements.

Abstract: A conductive synthetic resin composition, which is suited for manufacturing a molded product having an excellent electromagnetic shielding effect, and comprises master pellets consisting of a cylindrical synthetic resin layer and a bundle of a number of strands of fibrous conductive filler filled inside said synthetic resin layer in a longitudinal direction thereof, the master pellets being cut in the form of pellets; and natural pellets consisting of a synthetic resin.

Abstract: A profile for use in the manufacture of frames for windows and the like comprises a core (1) of generally rectangular cross section of laminated plywood or cement-bonded fibrous material with a cladding (3) of plastics material, for example polyvinylchloride or polycarbonate, extruded therearound. The extruded cladding (3) provides, extending along the length of the profile, a glass (or other) panel retaining member (9) which is inclined inwardly (preferably at 45.degree. or substantially so) over a surface of the profile, and an undercut rib 11 spaced from the member (9). In manufacturing frames from the profile the latter is cut into appropriate lengths by saw cuts (31-39) extending at 45.degree.

Abstract: An apparatus and method for producing fiber reinforced plastic composite articles which have a length and where the shape of and volume of material in the composite across its length is not necessarily uniform. The apparatus receives filament containing reinforcing material, as for example, strands of filament reinforcing material impregnated with a hardenable binder such as a curable resin. The apparatus also includes a device for forming cores or plugs from a bulk-molding compound, roughly in the form of the desired shape of a portion of the article to be produced. Thereafter, the resin impregnated fiber containing reinforcing strands are disposed about each of the plugs which are draped over a continuous string to from a chain of the plugs on the string. The impregnated strands preferably enclose the plugs to form a composite therewith.

Abstract: Process for forming a scrim-reinforced film wherein a molten, film-forming plastic, such as polyethylene, in a high state of fluidity is fed onto an unsupported scrim and solidified by cooling to produce a scrim at least substantially completely enclosed and surrounded by the plastic. The film, thus produced, can be formed into a high strength bag container by a folding and cutting operation utilizing hot knife means capable of fusing and thus sealing the plastic. In a preferred embodiment, the plastic is extruded onto the scrim.

Abstract: Tubular products are provided by applying a first, inner plastic layer onto a core wire and by applying a wire sheathing onto the first plastic layer as a continuous structure thereon. The wire sheathing is then locally removed to provide defined, spaced areas without wire sheathing and intermediate areas including the wire sheathing, and the structure thus provided is covered by applying a second, outer plastic layer thereon, thereby providing a strand structure. As a next step, this strand structure is cut at one limitation of each area without wire sheathing, whereby strand pieces are provided having one end portion which has no wire sheathing therein. The core wire piece left in each strand piece is then removed, thereby providing a tubular product having a body portion including wire sheathing and being completely integral with an end or tip portion without wire sheathing.

Abstract: An apparatus for and method of severing a continuous flexible reinforced elastomeric conduit supported on a plurality of elongated rigid mandrels disposed in connected end-to-end relation is provided with the apparatus and method enabling cutting through the conduit at each end of each mandrel so that each mandrel has a length of conduit therearound which is approximately equal to the length of the mandrel.

Abstract: A sorting device for use in connection with a preforming press having a rotary die disk and a punching station cooperating with the disk to mold pellets, includes an electromagnetically operated guiding partition movable between a lower deviating position and an upper pellet passing position; an electronic measuring circuit for measuring the maximum compressing force exerted by the punch; an electronic control circuit for evaluating the applied compressing force and for activating the guiding partition; a first proximity switch cooperating with the punch for activating the control circuit at the moment of application of the compressing force and an electronic time-setting circuit activated by a second proximity switch and cooperating with the control circuit to adjust the instant of activation of the latter in response to the speed of the die disk and to the actual position of a complete pellet relative to the deviating partition.

Abstract: A method for the production of curved tubular elastomeric articles such as hose is described which uses a rigid, deformable mandrel. An uncured hose assembly is placed on the mandrel, and the assembly, including the mandrel, is deformed to a preselected curvilinear configuration, and then partially cured. The partially cured hose is straightened and the mandrel is removed. The partially cured hose is then returned to the curing chamber to complete the curing.

Abstract: A process is provided for the continuous production of modular tubular filter elements using nonwoven webs in cylindrical or sheet form spun from thermoplastic fibers, spinning the fibers continuously from a melt onto a rotating internal tubular core for the filter element, serving as a mandrel, and winding them up on the core to form a wound tube.

Abstract: The present invention provides in a method of continuously heating limestone-mud, particularly the calcination of the limestone-mud to form lime, which method comprises continuously passing the mud through a refractory lined chamber where it is contracted with hot gases, the improvement in which the mud is passed through the chamber as at least one continuous self-sustaining column, the hot gases contacting the outer periphery of the column. The invention also provides an apparatus for use in said method.

Abstract: Pencils made with a resin-based sheath to replace wood sheaths. A sheath material consisting essentially of a resin binder, a fibrous filler and a metallic soap is extruded around a marking core. The resulting extrudate is immediately chilled after leaving the die, and cut into pencil lengths. The apparatus includes core feeding and transport means, core preheating means and chilling means. The resulting pencils possess the physical qualities associated with wood-sheathed pencils due to the fine, closed cell structure of the sheath material. The surface of the sheath is smooth and may be coated with a pigmented resin or painted.