Abstract: A method of making a keyboard including, a number of switch keys fixedly provided on one surface of a resilient plastic sheet a number of moving contacts formed on the other surface of the resilient plastic sheet. The keys are formed of a plastic material having a melting temperature lower than that of the resilient plastic sheet.Thermoplastic bond layers are deposited on both surfaces of the resilient plastic sheet. The melting point of the thermoplastic bond layers is lower than that of the switch keys.The resilient plastic sheet is placed in a metal mold which has cavities (101a) at predetermined places.Melted plastic material is injected into the cavities to form the switch keys and at the same time cause the portions of thermoplastic bond layers which contact the injected melted plastic to be melted by the heat of the injected melted plastic material and to bond the switch keys onto the resilient plastic sheet.

Abstract: An insulator comprising a rod made of continuous glass fiber impregnated with epoxy resin, metal end fittings, and a polymeric sheath. The rod is tightly embedded in the sheath and the ends of the rod are pressed into the fittings. The sheath consists of alternately mounted segments of two types: spacing sleeves made of elastic material and externally profiled sleeves made of stiff material. The spacing sleeve has beads at the ends. In order to transfer axial forces, the spacing sleeves are partly covered by the profiled sleeves, said covered portion including the beaded ends. The method by which this insulator is made consists in that, first, the spacing sleeves, made of silicone rubber, are cast directly onto the rod by the pressure-injection method; second, the rod is covered by a layer of adhesive agent from the silicone group and, third, in the interspaces formed between the spacing sleeves, the profiled sleeves are cast in a split mold by means of the injection method.

Abstract: A method of molding a plastic component having first and second portions interconnected by a transition zone with a barrier material encapsulated in the plastic material of both of the portions of the component. The permeable barrier material is placed in a mold cavity to divide the cavity into first and second portions. The first portion of the cavity is filled with plastic material while the second portion of the cavity is filled with plastic material to permeate the barrier material with plastic from both portions whereby the barrier material defines the transition zone and is encapsulated in the plastic component.

Abstract: The invention provides a method and apparatus for injection-molding at least a first part of a plastics manifold element onto an extruded, panel-forming plurality of juxtaposed, hollow elements, comprising the steps of introducing into one set of ends of the hollow elements protrusions which extend from a core defining the shape of at least part of the interior space of the final manifold to be formed; clamping the region of the set of ends accommodating the protrusions between first and second mold members which, together with the core delimit the cavity of at least part of the final manifold; injecting plastic material into the cavity; and removing the core, and the mold members, whereby a strong bond is formed between the hollow elements and the manifold.

Abstract: A method for injection molding a particularly elongated tubular parison having a closed bottom and assuring consistently uniform wall thickness in the tube wall, is disclosed. The method involves injection molding an open bottom tubular member, and thereafter forming a bottom wall integrally with the tubular member in a separate injection molding step in which a molten polymer is injected into a mold cavity defined, in part, by the bottom end of the tubular member. During the first injection molding step, the core mold is held at both ends by the other components of the mold assembly so that there is no possibility of eccentric misplacement of the elongated core in the mold cavity due to flexing of the core, which would cause non-uniformity in wall thickness of the molded tube.

Abstract: A pedestal liner for a pedestal truck of a railway vehicle and method of making same are provided wherein such pedestal liner is of roughly U-shaped configuration having a bight and a pair of parallel legs and comprising a continuous uninterrupted backing material defining the bight and parallel legs, a first antifriction material for the bight fixed against the backing material and adapted to engage a vertically disposed planar guide surface of an associated journal box, a second antifriction material for the parallel legs fixed against the backing material and adapted to engage vertically disposed parallel side surfaces of the journal box which are disposed on opposite sides of the guide surface with the backing material providing optimum structural support for the antifriction materials and the first and second antifriction materials having different wear characteristics determined by the different wear rates to which they are subjected.

Abstract: A pedestal liner for a pedestal truck of a railway vehicle and method of making same are provided wherein such pedestal liner is of roughly U-shaped configuration having a bight and a pair of parallel legs and comprising a continuous uninterrupted backing material defining the bight and parallel legs, antifriction material for the bight adapted to engage a vertically disposed planar guide surface of an associated journal box, antifriction material for the parallel legs adapted to engage vertically disposed parallel side surfaces of the journal box and disposed on opposite sides of the guide surface, and means fixing the antifriction material against the backing material with the backing material providing optimum structural support for the antifriction material.

Abstract: A method of forming blade members for use in a wire stripping device characterized by moulding a plurality of pairs of body portions on an elongated strip of thin blade material, cutting each pair of the body portions from the strip and then breaking the pairs of body portions along a common line thereof to define the individual blade members.

Abstract: A snap fastener component strip is disclosed as including a series of like square plastic components interconnected by molded plastic portions which are reinforced by continuous polymer monofilaments embedded in the components to provide a strong, flexible strip of components particularly suited to handling by automatic machinery. A method of molding such strips is also disclosed.

Abstract: A molded heavy duty wheel and method for making it, comprising a metallic core with a central opening and a circumferential flange, a moldable plastic or rubber material on the interior circumferential portion of the flange, and a tread of moldable plastic or rubber material on the exterior circumferential portion of the flange. The tread portion is bonded to the core to prevent slippage.

Abstract: Method of supporting a preformed membrane in an electrolytic cell, and apparatus therefor, which comprises casting in situ support plates about the open edges of the membrane.

Abstract: A field transplant system including a machine for sequentially forming groups of polymerized soil plugs having seed receiving recesses in one end thereof and supported on a carrier, and in certain cases interconnected by strips, the carrier being used to transport the soil plugs through a seeding station and then to a germination station and then to a growing station either in the flat or on a plant turning machine in a greenhouse to grow the germinated seeds to transplant size, and then using the carrier to transport the soil plugs with the transplants growing therein to the field for transplanting by an automatic transplanter; several forms of soil plugs are disclosed, and several methods for supplying seeds to the soil plugs are disclosed, as well as an improved method of mounting a mat of soil plugs on the cylinder of a plant turning machine.

Abstract: The process and mold are specially adapted to produce safety footwear for professional use and in particular for persons working on building sites, these articles being obtained by injection molding. The process comprises previously coating the metal sole with adhesive on both sides and fixing it on the mold slab corresponding to the first injection at a distance from the last so as to form between the mold cavity of the slab and the last a gap corresponding to the thickness of the insole produced by the first injection. Thereafter, the slab is removed and there is brought in front of the visible face of the metal sole the second slab for injecting the outsole which will cover the face of the metal sole.

Abstract: A method and an apparatus for manufacturing furniture by joining panels and making corners, in which at least two panels each having generally parallel generally planar major faces and a generally planar end surface bounding one edge of the major faces are arranged with mold instrumentalities to form a mold cavity bounded in part by the respective end surfaces of the two panels. Plastic material is deposited into the mold cavity and the two panels are bonded together into a corner configuration by the plastic material while the plastic material is confined and shaped into a predetermined configuration. The plastic material preferably is a structural foam material and the mold instrumentalities preferably define an inclined, heated mold cavity in which reactants may form the structural foam.

Abstract: A high-precision injection-molded form for an inductance coil comprises a cylindrical core formed of a solid mass of plastic or similar material which has a surface of relatively low dimensional precision. A thin plastic layer molded over the surface of the core provides a high precision surface including helical grooves in which the windings of the coil are seated.

Abstract: A process for producing cork lines which comprises holding a leader or leaders with a pair of metal molds having at the junctional surfaces thereof one or more cavities for forming a float or floats and one or more furrows formed so as to pass through said cavity or cavities for holding said leader or leaders, injecting a molten synthetic resin mixed with a foaming agent into said cavity or cavities to effect molding and foaming of said resin, cooling said metal molds and taking out a float or floats integrally fixed to said leader or leaders from said metal molds.

Abstract: Open-air compound insulators are made treating a prefabricated glass-filter rod with silane, extruding a rubber layer on the rod, strengthening the rubber layer and bonding prefabricated screens to the rubber layer by vulcanization.

Abstract: A prefabricated structural element and a method of bonding wallboard to structural elements such as trusses for use in construction or prefabrication of ceilings or walls. The method involves applying a resilient polyurethane foamable liquid by a high pressure impingement mixing spray gun onto areas of a clean, dry wallboard substrate which have wood trusses or studs placed upon them. The foam is sprayed on the drywall at the juncture with the wood members on both sides of the wooden members. The resulting bonded structure permits the unit to be used without further nailing or other attachment means. The foam also permits the combined product to present a flat surface regardless of irregularities in the wood trusses.

Abstract: A process of forming a decorative jewelry stone wherein a photographic film image, created by photographing positive artwork and being essentially transparent except for the image thereon, is utilized as the mold for receiving an uncured plastic resin in substantially liquid form. The resin is permitted to cure, the resultant partially formed article with the film portion attached thereto reversed in position such that a second amount of similar resin can be applied thereto to essentially embed the film portion therein. Since the film portion is essentially transparent except for the image thereon, the remaining portions of the film visually merges with the resin segments on either side thereof such that only the image is readily observable.

Abstract: A method of making a cut glass panel comprising a plurality of glass piece arranged with cames in a predetermined pattern between adjacent edges of the glass pieces and having flanges on both sides of the glass pieces. The method comprises providing a mold having grooving in the upper face thereof in the pattern of the cames, introducing moldable material into the grooving, allowing the moldable material to set in the mold to form the flanges for one side of the glass pieces, and removing the flanges from the mold. The glass pieces are positioned on the same or a similar mold with the edges of each glass piece spaced from the edges of the adjacent glass pieces in the predetermined pattern and with the spaces between adjacent glass pieces above the grooving. Moldable material is introduced in the spaces to fill the grooving and the spaces. The previously formed flanges are positioned on the upper surface of the glass pieces so as to engage the moldable material at the top of the spaces.

Abstract: A method and apparatus for making an encapsulated electrically conducting component is provided. A wire is placed across a mold cavity for forming substantially one-half of the component body. A substantially flat-surfaced second mold having a groove is placed against a first mold to hold the wire in the groove and in alignment with respect to the cavity of the first mold while fluid plastic material is injected therein to encapsulate a substantially semi-cylindrical surface portion of the wire and form one-half of the conducting component body. Next, a third mold is placed against the first mold. The third mold has a cavity defining substantially the remaining half of the component body. The fluid plastic is injected through the first mold and into the cavity in the third mold to form a completed, composite molded body.

Abstract: In a sodium sulphur cell, a cathode electrode of annular form comprising a plurality of segments, each of trapezoidal form in cross-section is made by compressing a blanket or sheet of carbon or graphite felt or fibres in a heated mould, which is shaped to produce the segments joined by thin webs, the material being impregnated with sulphur or sodium polysulphide before or after insertion in the mould, and the material being cooled before removal from the mould. Alternatively, the segments may be formed from the blanket or sheet by using shaped rolls, the mateial being cooled, e.g., by water or air, as it leaves the rolls.

Abstract: In the manufacture of trains of fastening elements for slide fasteners, flowable synthetic polymer resin is injected into gate or runner channels formed in a cavity wheel and extending beneath one edge of a band enclosing cavities of the cavity wheel such that the flowable synthetic polymer resin flows through the channels into the cavities to form fastening elements.

Abstract: Each stringer of a slide fastener includes a plurality of spaced coupling elements, molded on continuous connecting threads, with wing portions extending into the spaces between the legs of coupling elements on the upper side thereof. The stringer tape weft threads are looped over the connecting threads and pass over the edges of the wing portions adjacent the heads of the coupling elements while a number of the warp threads interwoven with the weft threads overlie the legs and wing portions to form a slide fastener chain with hidden or invisible elements.

Abstract: A process for producing cork lines which comprises holding a leader or lers with a pair of metal molds having at the junctional surfaces thereof one or more cavities for forming a float or floats and one or more furrows formed so as to pass through said cavity or cavities for holding said leader or leaders, injecting a molten synthetic resin mixed witha foaming agent into said cavity or cavities to effect molding and foaming of said resin, cooling said metal molds and taking out a flat or floats integrally fixed to said leader or leaders from said metal molds.

Abstract: A method of continuously encapsulating a component is disclosed. A predetermined quantity of viscous encapsulating material is applied to each of substantially opposite exterior portions of the component. Thereafter, an external force is applied to the encapsulating material causing it to flow substantially covering the entire exterior surface of the component, after which the encapsulating material is cured.

Abstract: Disclosed is a method of bonding two layers of thermosetting plastic. A thin sheet of thermoplastic material is interpositioned between two layers of thermosetting plastic and the combination is subjected to temperatures sufficient to cause the thermosetting plastic layers to bond and cure. The thermosetting plastic contains mold release agents which are absorbable by the thermoplastic sheet, and crosslinking monomers in which the thermoplastic sheet is dissolvable at molding temperatures.

Abstract: A plurality of mold pairs together forming an array having an outer surface and each having a mold cavity and an inlet between a respective cavity and the surface is continuously rotated past the end of a generally stationary nozzle so as sequentially to align the inlets with the nozzle end. A plastified and hardenable resin is continuously fed under pressure to the nozzle end which is spaced from the surface of the mold array by a predetermined constant distance. Thus resin material continuously exits from the nozzle. When the nozzle is aligned with an inlet opening this material enters the inlet opening and forms a body therein and a sprue integral with the body. When the end is not aligned with the inlet the material escapes laterally from between the end and the surface and forms on the surface a generally continuous film unitary with the sprues. The mold pairs are sequentially opened and closed on successive spaced-apart locations of a wire before and after the molding thereon of the bodies.

Abstract: A method of potting in a single or multi-cavity mold a plurality of fibers in continuous tow form to encapsulate the fibers, fill the interstices and form a solid tubesheet of selected shape and length. After transversely cutting through the thus formed tubesheet and the fibers therein a pair of tubesheets are formed each attached to and forming the end portion of a length of fibers. Potting at spaced longitudinal locations on the continuous tow, and transverse cutting, produces fiber bundle assemblies having a length of the tow of hollow fibers between a pair of axially spaced tubesheets. The process is semi-continuous or continuous, as desired.

Abstract: A process for the manufacture of intravenous solution filter units includes injection molding a sealing member onto the periphery of the assembled filter components to hermetically seal the components into an integral assembly. The filter unit itself includes a housing and a filter element disposed internally thereof. The filter element is supported by a grid having a design and placement within the housing to assure, in conjunction with other structural features of the filter, the complete purging of gases from the filtrate. Also disclosed is a method for hermetically sealing the filter element to its thermoplastic support which provides an improved seal which will not leak. This method comprises the molding of the support, the alignment of the filter element on the support, the application of pressure to hold the element on the support and the overmolding of the periphery of the element to seal the edge of the element to the support.

Abstract: A method is provided for the production of sheet or platter shaped information carriers or records having surface structures thereon which correspond to recorded information, in particular video-signal memories of high storage capacity. An original or master information carrier or record has originally recorded information formed as a surface structure. This original is used to produce duplicate sheet or platter shaped records by applying a lacquer layer to the surface structure of the master record, hardening the layer, and permitting the hardened layer to adhere to an unmarked surface on the duplicate record to be produced.

Abstract: A precision injection-molded form for an inductance coil comprises a cylindrical core member having a surface of relatively low dimensional precision, and a thin plastic layer molded over the surface to provide a surface of high dimensional precision for supporting the windings of the coil. Metal insert-members having threaded axial bores and radially extending wing portions are provided at either end of the core to establish electrical contact with the winding and a mounting capability for the assembly. The coil form is formed by injection molding techniques and apparatus which provide for axial compression of the assembly prior to molding to obtain a predetermined longitudinal dimension, and for equalization of forces exerted during molding to prevent longitudinal deformation.

Abstract: A carrier structure for electronic components which allows safe handling, testing, marking and shipment is fabricated as an integral part of the electronic component package. The carrier forms a square protective enclosure surrounding the electronic device and connected to the electronic device by breakable plastic tabs which are molded with the electronics component package. The structure allows the electrical leads of the electronic component to be trimmed, formed, and tested while the component is still attached to the carrier.

Abstract: A pipe mold for vertically cast concrete pipe includes a cylindrical outer mold case, a cylindrical core spaced inside the mold case, and a pipe-reinforcing cylinder between the core and the case. A system for casting concrete in the pipe mold includes a flat facing ring above the annular space between the mold case and the cylinder. A chute assembly mounted concentrically above the pipe mold includes several radially extending and spaced apart pouring chutes extending downwardly from the center of the chute assembly to corresponding circumferentially spaced apart openings in the facing ring. The pouring chutes channel the flow of concrete into the openings in the facing ring to fill the pipe mold to the bottom surface of the facing ring, which forms a flat annular end section at the desired elevation on the pipe. The facing ring eliminates the need for hand finishing and measuring which is common in the prior art manufacture of vertically cast concrete pipe.

Abstract: There is disclosed a lattice structure having a plurality of elongated parallel elements interconnected periodically by integrally formed ribs therebetween and a plurality of elongated filaments, each of which is embedded in and adhered to one of the elongated parallel elements. The structure is constructed by a method which includes the steps of molding the lattice structure from film or laminate belts, heating the filaments above the melting temperature of the molded lattice structure, joining the heated elements with the structure and solidifying the lattice structure adjacent each filament.

Abstract: Method of molding plurality of spaced fastener elements onto parallel filaments. A pair of leg portions of each fastening element have, respectively, a projection and an opening, the projection and opening mating to interlock the leg portions. The fastening elements are formed by directing the parallel filaments to a cavity wheel which has mold cavities enclosed by a band, and then injecting plastic material through gate openings in the band into the mold cavities to form a train of fastener elements on the parallel filaments.

Abstract: A microfiche structure consisting of a laminate of an opaque, apertured web sandwiched between two transparent sheets. The transparent material partially extends into each aperture to thereby define, for each aperture, an optical doublet. The laminate may be continuously formed by compression, as by rolls.

Abstract: A method of molding plastic layers such as used for table tops and the like in which decorative pattern dividing strips are applied to the mold surface in a support frame. The strips are adhesively secured to the mold surface and then the support frame removed after which the plastic mix is applied.

Abstract: A method and apparatus for fabricating continuous lengths of cleated belting. The method includes the steps of feeding a continuous length of belting base material alternately forwardly with or over and backwardly with, a cleat positioning mold first into, then out of and then through the space between vertically moveable press platens. The cleats are assembled with and cured to the base material in longitudinally adjacent groups. Each group of raw cleats and a corresponding section of the base material is moved with the mold forwardly into the press, cured, and then moved rearwardly with the mold out from between the press platens. The cured section is separated from the mold. A new group of uncured cleats is positioned for a succeeding section. The base material, including the cured section, is moved forwardly relative to the mold until the last cured cleat of the group of cured cleats is positioned at the first of the cleat positions of the mold.

Abstract: A method of repairing or reinforcing a tubular plastic member is described. According to the method, a metal sleeve is applied to the plastic member under the action of heat. The sleeve is of a shape and size selected to closely fit and make surface-to-surface contact with the member at the region thereof to be repaired or reinforced. The sleeve is heated to a temperature sufficient to cause melting of the surface of the member where it contacts the metal sleeve. Subsequently, the plastic member and sleeve are abruptly cooled.

Abstract: A method of moulding an element of an insulating material, such as a thermosetting plastics material, on a bimetal strip in which the bimetal strip is clamped in an injection mould by narrow clamping jaws disposed on either side of the mould cavity in the longitudinal direction of the bimetal strip. The width of the clamping jaws is such as to enable the remaining portions of bimetal strip to bow freely in response to heat present in the injection mould.The bimetal strips may be processed individually or as a group formed from a blank, the individual bimetal strips in the group being transversely joined to each other.

Abstract: A method of molding plastic containers of the type having enclosure portions which are adapted to be hingedly connected to one another. One embodiment of the invention involves a method for making a mirror-containing, cosmetic compact, comprising the steps of placing a mirror component face down on a mirror support of one of two cavity-defining molding dies, holding the mirror component against the mirror support, bringing both dies together, and injection molten plastic into the die cavities to cause it to back up and also surround the peripheral edge portions of the mirror so as to form one half of the compact. The method further includes, either at a later time or else simultaneously, the additional step of placing a hinge part in a recess of one of the mold cavities adjacent the mirror, and causing molten plastic to flow around a portion of the hinge part whereby the latter will be held captive in the plastic in predetermined relation to the mirror and the molded compact half.

Abstract: Method of reinforcing the handle of hockey sticks by molding against opposite sides of the handle a layer of synthetic resin in which are embedded reinforcing fibers extending longitudinally of the handle. These layers are bevelled along their opposite edges.

Abstract: A pneumatic tire is moulded using a mould core of cured rubber the radial sectional shape of which is the same as the internal radial sectional configuration of the finished tire. The opposite sides of the core are supported by fitting plates while a tread portion of tire is moulded onto the exposed outer periphery of the core. Thereafter the side plates are removed in turn and replaced by sidewall mould halves enabling sidewalls to be moulded against the core in contact with the tread portion.

Abstract: Composite panelling of upper and lower metal skins with side configurations for interlocking and a rigid foam core are continuously made by feeding separate upper and lower skin panels secured together by preassembled rigid foam end dams continuously past a foam station having a small height mixing head mounted on cross slides to lay down a zigzag pattern of foam between the skins, with the first and last transverse run of foam being parallel to the ends of the skins. A mixing head is such that valves are located within the head so that the two foamable chemicals do not contact each other until they are fed into the mixing chamber wherein a mechanical mixer mixes them immediately prior to being deposited, which mechanical mixer and valves are of minimum height and fully insertable within the molding space between the skins. A drive motor for the mixer is located in the main body supporting the mixing head, which main body does not enter into the mold cavity.

Abstract: A method of moulding concrete ties or other similar articles having pre-stressed reinforcing wires or rods therein, wherein a series of open ended multi-cavity moulds of similar cross-sectional shape are aligned end to end in groups, wires are positioned in the aligned cavities of the moulds and are tensioned, the wires are separated from one another and into horizontal rows in each group by flat sided bar like spacers which are interposed between the ends of adjacent moulds of that group, while the groups themselves are separated by vertically movable spacer plates each having vertically extended slots which arrange the wires into vertical rows.

Abstract: Method for making a microfiche structure consisting of a laminate of an opaque, apertured web sandwiched between two transparent sheets. The transparent material partially extends into each aperture to thereby define, for each aperture, an optical doublet. The laminate may be continuously formed by compression, as by rolls.

Abstract: A generally T-shaped flexible spacer for use in the formation of a flexible joint in concrete cladding for pipes, having a base flange and a compressible web extending generally perpendicularly from the base flange on one side thereof. In use, spacers are applied to a pipe at intervals, and are self supporting with the web radial of the pipe. When concrete is sprayed onto the pipe it forms a cladding in sections, between which the spacers provide compressible joints to accommodate bending of the pipe.

Abstract: A method and apparatus for tensioning dental floss is disclosed for use in the molding of a tooth cleaning dental instrument including a bow-shaped member having a first end and a second end with dental floss tensioned between the ends. A suitable plastic-like material injection mold having cavities for the molding of the dental instrument and having line cavities for receiving the dental floss is used in conjunction with the apparatus of the present invention. Dental floss is supplied from suitable sources and directed by guide members to tensioning members including primary and secondary tensioning members. The secondary tensioning members provide supplemental tensioning of the dental floss during the cool down period after the injection of the plastic-like material into the mold. The dental floss is tensioned by primary tensioning members during the injection of the plastic-like material into the mold.

Abstract: A method of making simulated stained glass from moldable plastic material. One wall of a die is formed with a series of interconnected recesses which border isolated areas, and the isolated areas of the die are provided with random surface indentations. A sheet of plastic film having a series of dark colored interconnected strips, corresponding in configuration to the recesses in the die, and having a series of light colored zones of the same configuration as the isolated areas of the die, is disposed on the die surface with the dark colored strips in precise registry with the recesses of the die and the light colored zones in registry with the isolated areas of the die. The plastic film is held against the die surface by a vacuum, and a liquid thermoplastic resin is injected into the die cavity.