Abstract: Apparatus and method for forming curved needlepoint canvases from initially flat perforated sheet by applying pressure to a first side of the sheet, thus driving and deforming it into an aperture in a die, and by supporting the opposite side of the sheet during deformation with a pressure pad which includes a recess into which the deformed sheet is driven.

Abstract: A mold includes relatively movable mold sections which defines multiple cavities and a space between two of the mold sections when the mold is open. The plurality of flexible strips each carrying a heat responsive transfer material are directed through the space and are clamped adjacent the mold cavities when the mold is closed. A plastics material is injected into the cavities to form the articles and to engage the transfer material to form predetermined artwork on the articles within the cavities. When the mold is open, the articles are removed, the strips are pulled through the space to advance new transfer material to the mold cavities, and the cycle is repeated. In one embodiment, the strips carry the transfer material at longitudinally spaced intervals in the form of the desired artwork, and in another embodiment, the artwork is formed by a template attached to the movable mold section adjacent the cavities.

Abstract: A method for forming turbulators on scale model airplanes used in wind tunnel testing for accurately simulating a transition point on the model surface equivalent to that produced on the full scale airplane. The transition point is where the boundary layer airflow goes from a laminar airflow condition to a turbulent airflow condition. The method relates to applying a perforated tape mask (14) to the model surface (12) at a predetermined location and filling the perforations (15) with a fast cure epoxy (17). After the epoxy has cure hardened, the tape mask (14) is peeled off in the direction of the arrow (16), leaving a series of in situ formed disk turbulators (10) which function to produce the transition point on the model surface.

Abstract: In a positive drive power transmission system composed of a toothed belt and two or more pulleys, operating noise resulting from the impact of the belt and the pulleys is dramatically reduced by having surface discontinuities on either the belt or on the pulleys on those surfaces where the belt and the pulleys engage in impact contact when in operation. The surface discontinuities may be formed by recessed or raised portions of the belt or pulleys, may be straight or curved, and may be substantially parallel to the tensile member or at an angle thereto. Several methods of manufacturing belts with such surface discontinuities are disclosed.

Abstract: A method for the production of a hose of a shape-cured elastomeric material, such as vulcanized rubber, especially an automotive radiator coolant hose, which method comprises the bringing of the hose onto a flexible straight mandrel, sliding the flexible mandrel onto an inner mandrel portion having the finally desired configuration of the hose, curing the hose in this configuration, sliding the flexible mandrel together with the hose off said inner mandrel portion and bringing the flexible mandrel onto a straight auxiliary mandrel and sliding the hose off the mandrel.

Abstract: A method of making a top toothed endless power transmission belt construction that is formed mainly of polymeric material and a belt construction made by such method are provided, the method comprising the steps of disposing the material in substantially cylindrical form on a substantially cylindrical drum-like support member, disposing a substantially cylindrical toothed member about the disposed material, compressing one of the members toward the other of the members with the pressure of pressurized steam to form top teeth in the material and cure the thus formed material with the heat of the steam into a top toothed belt construction, introducing pressurized steam against the other member during part of the time that the one member is being compressed toward the other member by the pressure of the pressurized steam, and temporarily releasing the pressure on the one member before the polymeric material has been cured to permit the gas that has been initially heated and thereby expanded in the polymeric mate

Abstract: Proposed is a distance sheeting for construction of molds and models; the sheeting is produced by curing of 100 parts by weight of a mixture consisting of 45-60 parts by weight of an internally plasticized epoxy resin of low epoxide value, 5-10 parts by weight of an external plasticizer and 35-45 parts by weight of a globular-amorphous filler material with 9-13 parts by weight of polyamine curing agent. This distance sheeting is especially suitable as a substitute for the sheetings made of lead or wax which are being used currently for this purpose.

Abstract: A high-hardness and high-strength carbon material is produced by disposing a body of graphite carbon, e.g. precompacted graphite or a mass of powdery graphite carbon, of a predetermined shape and dimension in a collapsible receptacle shaped and dimensioned to tightly retain the body therein, the receptacle being collapsible at least one-dimensionally under external pressure while holding the body against expansion. High pressure is applied to the body while the body is heated to an elevated temperature and for a sufficient period such as to cause a central region of the body to be liquefied and the remainder thereof to be sintered. While under continuous pressure, the body is cooled to give in carbon material.

Abstract: A mold for synthetic resin products which are to be shaped while soft, includes a pair of elongated mold parts each having opposed complementary faces with contours at least partially conforming to at least parts of the product to be shaped. A support means on which the mold parts are mounted provide for moving at least one of the mold parts relative to the other mold part to effect removal therefrom of a finished product. The mold parts are constructed and arranged so as to be bendable along their longitudinal axes to effect a change in arcuate configuration, the mold parts being made of a material which facilitates sliding of the synthetic resin product through the mold, the support means supporting the mold parts in fixed spaced apart disposition as the product is moved longitudinally between the mold parts to thereby impart to the product an arcuate configuration corresponding to the arcuate configuration of the mold parts.

Abstract: Molded thermoplastic parts with aspherical surfaces are produced with molds whose molding-cavity surfaces are of spherical development and are elastically deformable. The spherical surfaces are so deformed in specific manner by the pressure of the thermoplastic material during the molding process that predetermined aspherical surfaces are produced. Aspherical surfaces of non-rotational symmetry are produced by additional, yieldably mounted auxiliary pistons which are connected to a hydraulic system.

Abstract: A method and an apparatus is disclosed for forming viscous and resilient food material into a globular or spherical shape by feeding such food material, in a predetermined amount, between a pair of beds. The surfaces of the beds face each other and are kept wet by capillary action, with an anti-sticking liquid. The surfaces are adjustably spaced, one from the other, so as to apply an optimal level of pressure on the food material. At least one of the beds are subjected to an eccentric rotation to produce globe-shaped viscous and resilient food material at small cost and on a large scale by making it possible to mechanically form the viscous and plastic food material into a globular or spherical shape.

Abstract: A method of constructing a shell-formed structure including the steps of first constructing a base, such as concrete slab, having a retention means defining the area of contact of the finished wall of the building with the base, the retention may be in the form of a recessed notch formed in the concrete pad, supporting a top yoke centrally above the base, positioning a plurality of spaced apart flexible slats between the base retention means and the yoke, lowering the yoke to cause the flexible slats to bow uniformly in a generally quarter circular or quarter elliptical configuration so that the bow slats generally define the exterior wall shape of the building, attaching a covering to the bowed slats, applying a layer of settable material, such as concrete, to the covering and allowing the settable material to harden to thereby form the structure.

Abstract: A curved mandrel, method of making same, and method of curing an uncured polymeric hose employing such curved mandrel are provided and the curved mandrel comprises a plurality of members disposed in end-to-end relation to define the configuration of the mandrel including a predetermined curvature therein, interlocking portions for interlocking the members in only one position to define the configuration and curvature, and a readily attachable and detachable device for holding the members axially against each other after interlocking wherein the members with the interlocking portions and holding device are adapted to provide a substantially straight mandrel for installation of an uncured straight hose therearound, define the configuration and curvature in the mandrel and uncured hose, and provide looseness and axial spacing between members to enable easy withdrawal of the cured curved hose from around the members.

Abstract: The invention provides a novel method for the preparation of an electric connector formed of a core rod of an insulating rubber and a stripe-wise annular zones of a layer formed of an electroconductive paint to exhibit an appearance something like a brandling earthworm. According to the invention, a strip of a plastic film bearing printed stripes of the conductive paint is introduced lengthwise into a tubular mold with the printed surface facing inwardly to take a tubular configuration in direct contact with the inward surface of the tubular mold and the printed surface is brought into contact with the surface of the core rod so as that the striped layer of the conductive paint is transferred and adhesively bonded to the surface of the core rod, each stripe forming substantially closed ring on the core rod. The core rod may be an pre-formed rubber rod or formed by in-mold curing of a liquid prepolymer convertible into a rubber.

Abstract: A method for low cost mass production of isostatically pressed powder calm discs by placing a multiplicity of molds with powdered calcium thereon in a mother bag that is later sealed and pressed isostatically to press the calcium powder relative to its respective mold.

Abstract: Moulding apparatus with a passage between mould parts to locate an article extending through the mould parts and into the mould cavity. A device is disposed within the passage for gripping and sealing against the article. This device is resiliently compressible and has gripping and sealing ribs projecting into and spaced along the passage. Parts of the device lying between the ribs define parts of the passage of substantially equal diameters for use with an article, e.g. a cable with an outside diameter which is also substantially equal to the passage diameter at those parts of the passage.

Abstract: This invention pertains to a method to permit the molding of a plurality of plies of polymeric compositions into an integral molded object having a minimum number of internal flaws and, therefore, improved properties. The plies are positioned in contiguous relationship, and the initiation of the polymerization reactions is controlled by selecting catalyst systems which substantially simultaneously initiate polymerization in each of the plies to prevent the development of curing seams at the points of contact between the plies.

Abstract: A racket frame is made by molding a thermosetting resin composition together with reinforcing fibers. Molds are made of flexible strip members, such as plastics, wood pulp, paper pulp, wood, bamboo, etc., which are bent to form a racket frame in a fitting, thereby reducing the production cost incurred in fabrication of expensive molds. The formed racket frame has no shell and core structure.

Abstract: Fiber reinforced thermoplastic resin composites are molded and cured in a system using controlled elastomeric tooling to apply molding pressure only after temperature has been increased to a selected point. A composite material to be molded and cured is typically placed between a fixed mold surface and a movable reaction block. A container is mounted on a fixed support behind the block in a manner permitting movement toward the block. The container has an interior base generally parallel to the block and an upstanding edge extending toward the block. A pad of an elastomeric material having a positive coefficient of thermal expansion is retained in the container by the edges. The pad extends beyond the edges into contact with the block. A gap of selected size lies between the pad and the container base. As the assembly is heated during molding, the pad expands into the gap without exerting significant pressure on the block.

Abstract: A method and an apparatus for manufacturing the socket portion of a plastics pipe provided with a sealing ring by pushing said sealing ring on a mandrel and by locking it thereto whereupon the heated end of said plastics pipe is pushed onto said mandrel and said sealing ring. Hereafter, the locking of said sealing ring is released, and the pipe and the ring therein a removed from the mandrel.In order to facilitate this removal operation, a mandrel having an adjustable diameter is used, the mantle surface of said mandrel being provided with peripheral grooves into which shoulders in said sealing ring fit for locking said ring to said mandrel for the duration of the socket forming.

Abstract: A moldable article useful for making a form-stable article is described. The moldable article comprises a formable material that is a moldable polymeric or prepolymeric substance that can be cured to a form stable state and a curing agent, in close proximity to the curable substance but isolated therefrom, in a frangible container. The container containing the curing agent is initially flexible and is rendered frangible by special treatment which is part of the invention. In use, the frangible container is ruptured to release the curing agent and the moldable article, in a first configuration, can be shaped to a second configuration in which it is maintained until the formable material is cured sufficiently for it to be form-stable in the second configuration. The moldable article can be used to make molds, casts, support for a portion of the human or animal anatomy, or other articles with diverse utilities.

Abstract: A method of producing finishing chips comprising the steps of providing a castable mixture of particulate abrasive grains and a solidifiable matrix, depositing the mixture into cavities of a generally-cylindrical, flexible mold having a plurality of cavities in the interior surface thereof conforming to the desired configuration of finishing chips to be produced, rotating said cylindrical mold during solidification of said mixture and the production of solid finishing chips within said cavities, and ejecting said solidified finishing chips from said mold by bringing said mold to an inside-out position, whereby said solidified finishing chips are ejected from said cavities, is disclosed.

Abstract: A method of joining narrow waterproof sheets to obtain a waterproof sheet of wide width having a gently curved joint which is free from any acutely stepped portion. It comprises disposing a cure tape between the overlapping edge portions of the sheets to be joined, positioning a piece of cushiony material below or above the overlapping edge portions, and heating the overlapping edge portions and the cure tape under pressure. The cure tape has a width which is substantially equal to that of the overlapping edge portions before pressure is applied thereto. When pressure is applied, the cure tape projects in opposite directions beyond the extremities of the overlapping edge portions. One form of the joint thus formed is flat on one surface and gently curved on the other surface, while another form is gently curved on both surfaces thereof.

Abstract: An improved process for molding fiber-reinforced articles and in particular, those articles which are formed from monofilaments such as metal fibers and processed mineral fibers of the slag type. The fiber-containing molding composition is enclosed in a restraining means, such as a bag, and placed in a mold and formed during which time the bag advantageously deteriorates.

Abstract: In the growth of gadolinium gallium garnet monocrystals, a crucible is charged with a preformed body (65) of oxide powders to form a melt. In preparation therefor, the oxide powders are formulated into a typical particulate material (16) which is compacted into a body (65) having a desired size and shape. For holding material (16), there is provided a pouch (38) of a first size having elastic walls expandable to a second size, larger than body (65). The pouch (38) is disposed within a chamber (36) having inside walls conforming to the desired shape of the body (65) but of the second size. An open neck (42) of the pouch (38) extends through and is sealed to an opening (60) in chamber (36). Then a vacuum is drawn between the pouch (38) and chamber (36) to expand pouch (38) to said shape and second size formed by the chamber walls. As the particulate material (16) is introduced into the expanded pouch (38), such material conforms to the shape and second size of such expanded pouch.

Abstract: A multi-ply elastomeric belt is produced by tensioning fabric over a lower mold section, elastomeric enveloping said fabric under pressure to form a so called "pulley ply" section, inverting said ply, tensioning at least one fabric member over said ply and elastomerizing the fabric to form at least a belt section, a continuous belt can be made.

Abstract: Chopped pieces of meat are placed within a mixer having an outlet with a feed screw, and an elongated discharge tube is coupled to the outlet. The outer end of the discharge tube supports a plate having a predetermined shape corresponding to the shape of a meat product such as a steak or pork chop forming an individual serving portion. A plastic bag is pulled over the discharge tube and end plate, followed by a clamped tubular mold having a longitudinal joint and an inner surface corresponding to the shape of the end plate. The outer end of the mold is closed, and the mixed meat product is extruded through the tube into the bag within the mold while the mold is moved from the tube and end plate under restraining back pressure. The mold is unclamped, and the bag and meat product are slid from the mold onto a tray conforming to the shape of the lower portion of the mold. The meat product is frozen on the tray, after which the bag is removed, and the meat product is cut into individual serving portions.

Abstract: Two small diameter fiberglass tubes are rolled on silicone rubber slugs and inserted into a larger cylinder which is then pinched into a figure-8 shape. This is put in the curing mold. When heated the silicone rubber expands to push the fiberglass into contact with mold surfaces. After cooling the slugs can be pulled lengthwise, which reduces their diameter so they are self freeing from within the cured frame.

Abstract: Articles of zeolite, such as 6 mm thick plates suitable for use in cryopumps, are produced by cold isostatic pressing fine powders with pore sizes between 2-25.times.10.sup.-10 m without the aid of binders. Plates which have smooth hard surfaces and high porosity may be readily machined.

Abstract: An RF probe and method for making same including laminating sheets of thermoplastic insulation to both sides of a layer of wire screen which is evacuated and pressure thereafter applied by fluid pressure acting on a diaphragm pressing member.

Abstract: A molding apparatus and method of molding or casting liquid resins and the like, are provided which includes flexible molding means. In one form, the mold is composed of two endless flexible belts, each of which is driven in an endless path with a portion of each belt driven parallel to a portion of the other belt and in contact therewith such that cavities formed in each belt come into alignment with each other when the belts make contact. Fast setting plastic liquid resin molding material is injected either at the side of or from the ends of the belts as they come together and flows into the cavities formed in the belts to continuously form a molded material or individual molded articles between the belts. After the molding material has solidified in the cavities between the belts, the belts are automatically driven apart and the molded articles removed from the cavities therebetween.

Abstract: A method of insulating electrical connectors having terminals with leads extending therefrom by using a flexible insert arrangement for an electrical connector mold for supporting leads extending therefrom and closing the mold end which includes a flat resilient body having one or more lead-accepting depressions normal to the body across one edge thereof and an arrangement actuable as the mold halves are closed on one another for deforming the body to temporarily displace the body resilient material about each electrical lead extending from the mold to complete the formation of an insulating material-accepting connector forming cavity. A flowable insulating material is then injected into the cavity to form the insulated connector.

Abstract: A process for forming a moulded confection, such as an ice confection, which has a protruding or re-entrant shape (i.e. with a surface portion having a negative draft angle with respect to a desired direction of mould release), characterized by:(a) filling a mouldable confection mix into a thin-walled flexible elastic mould having a cavity corresponding to said protruding or re-entrant shape, and also having in its wall at least one thin-walled flexible elastic cleft or pleat; and(b) solidifying the mouldable mix within the mould, and withdrawing the solidified confection mix from the mould so as to cause the mould to distort and the cleft or pleat to open or unfold and release a confection of said protruding or re-entrant shape from the mould.

Abstract: A method of molding a plastic part comprising supporting first and second mold sections so as to define a mold cavity, placing a flexible sheet over the second mold section, and forming a vacuum chamber utilizing the flexible sheet with at least the second mold section being in the vacuum chamber. Air passages are provided between the flexible sheet and the second mold section. The air pressure within the vacuum chamber is reduced to less than ambient to create differential pressure across the flexible sheet to hold the second mold section in position. Plastic material is pumped into the mold cavity. After the plastic sets, the second mold section is removed.

Abstract: The present invention is directed to a monolithic capacitor adapted to be secured to a substrate by reflow soldering methods, characterized by the configuration of the capacitor causing the solder to form a compliant mechanical bond between the capacitor terminations and underlying substrate, whereby the likelihood of capacitor failure due to thermal or mechanical shock is greatly reduced. The invention further relates to a method of making a capacitor of the type described.

Abstract: A curved mandrel, method of making same, and method of curing an uncured polymeric hose employing such curved mandrel are provided and the curved mandrel comprises a plurality of members disposed in end-to-end relation to define the configuration of the mandrel including a predetermined curvature therein, interlocking portions for interlocking the members in only one position to define the configuration and curvature, and a readily attachable and detachable device for holding the members axially against each other after interlocking wherein the members with the interlocking portions and holding device are adapted to provide a substantially straight mandrel for installation of an uncured straight hose therearound, define the configuration and curvature in the mandrel and uncured hose, and provide looseness and axial spacing between members to enable easy withdrawal of the cured curved hose from around the members.

Abstract: The molding process comprises pouring a plastic compound around a natural tree trunk to make a mold which has the tree trunk surface impressed therein. The plastic mold is supported in a frame made from wood which has a galvanized metal support therein. The metal brackets and structural rods are positioned on the base of the frame and a plastic core member may be used and removed to create the hollow interior of the tree trunk base.

Abstract: A premium paving unit of elastomeric binder material and friction aggregate formed by a molding method which results in an ideal distribution of the aggregate in the binder wherein the aggregate is exposed at a wear face of the unit, has a preferential orientation with the wear face, and is substantially uniformly distributed throughout the remainder of the unit.

Abstract: The invention is related to a method of assembling a segmented tire mold core from core segments inside a tire mold, a method of splitting up and removing a segmented tire mold core from a tire mold and an apparatus comprising a tool which determines the outer contour of a tire and a segmented tire mold core which determines the internal contour of a tire, as well as the associated charging, conveying and control devices.

Abstract: A plastic ornament and a method of making the ornament. Plastic pellets are placed in the holes of a mesh according to a predetermined pattern, each hole being sized to accommodate a single pellet. The pellets and mesh are heated until the pellets begin to fuse together. The mesh is then separated from the fused pellets. The fused pellets may be heated further until the plastic ornament achieves the desired smoothness.

Abstract: A moldable article useful for making a form-stable article is described. The moldable article comprises a formable material that is a moldable polymeric or prepolymeric substance that can be cured to a form stable state and a curing agent, in close proximity to the curable substance but isolated therefrom, in frangible hollow fibers. In use, the frangible hollow fibers are ruptured to release the curing agent and the moldable article, in a first configuration, can be shaped to a second configuration in which it is maintained until the formable material is cured sufficiently for it to be form-stable in the second configuration. The moldable article can be used to make molds, casts, support for a portion of the human or animal anatomy, or other articles with diverse utilities.

Abstract: A method of making shaped articles from powders comprises forming a cup mold of a destructible organic polymeric material such as nylon, cellulose acetate, poly(methyl methacrylate), polypropylene or polyethylene. The inner surface of the mold corresponds in configuration with the outer surface configuration desired in the shaped article. This mold is placed in a support member and filled with a measured quantity of powder. A plunger composed of a metal having a high specific gravity is placed on top of the powder, and the mold, mold support, powder and plunger combination is positioned in the swing bucket of a centrifugal apparatus where it is subjected to centrifugal force sufficient to achieve the desired degree of compaction of the powder. The mold is then removed and subjected to treatment at a temperature which is sufficient in the first instance to destroy the polymeric mold material, and then sufficient to sinter the powder.

Abstract: A method of making a composite structure upon a solid former having a low melting point, comprises placing the former together with the laid-up composite within a mould, raising the temperature of the mould such as to melt the former and expand it such that it consolidates the composite within the mould.

Abstract: An improved process for molding fiber-reinforced articles and in particular, those articles which are formed from monofilaments such as metal fibers and processed mineral fibers of the slag type. The fiber-containing molding composition is enclosed in a restraining means, such as a bag, and placed in a mold and formed during which time the bag advantageously deteriorates.

Abstract: A process for simultaneously batch-coating a number of electric components having radial connections wires extending in approximately parallel relation from the element to be covered utilizes a plate having a hole pattern therein for receiving the wires to retain the elements during coating. A synthetic foil is first placed over the plate and the wires are forced through the foil into the holes. A grid having openings therein formed by perpendicular walls for surrounding the elements is placed over the plate for use as a casting mold. A casting resin is deposited over the grid in excess quantity, and is then smoothed by moving a doctor over the grid. After the resin has hardened, the grid is removed and the individual elements, with the resin adhering to the synthetic foil, are separated.

Abstract: A mold for the production of a reinforced plastic tubular body having an annular groove such as a pipe coupling, the mold having a mold body and detachably mounted on a predetermined position thereof, an annular groove former consisting of a surface layer of an elastic material and a core covered with the surface layer. The reinforced plastic tubular body is produced by forming a layer of a molding material around the aforesaid mold, curing the layer of molding material, separating the mold body from the cured layer of molding material, and then separating the annular groove former from the cured layer of molding material by removing the core and then removing the surface layer.

Abstract: An improved apparatus is provided for forming the bead or fill line or groove in paper cups or containers by axially compressing an annulus of a resilient material thereby causing a controlled deformation of the material outwardly about its periphery. This outward deformation occurs internally of a cup pot or die which includes an internal bead, fill line or groove defining cavity into which a portion of a sidewall of a paper cup or container confined within the die will be forced by the said deformation to form the bead, fill line or groove.

Abstract: A method of preparing an assembly and an assembly useful in making a mold for casting one-piece impellers in which a master model of one of the vanes of the impeller is made in a polished metal having, on its inner end a shoulder with a height and depth approximately equal twice the width of the vane at its inside edge, the vane being tapered from inside to outside; from the master model a plurality of identical, flexible vanes are prepared from a material selected from the group consisting of flexible rubber and flexible plastic; a member having a truncated conical part containing therein a plurality of slots sized to match the inner edge of the vanes and a base plate having a plurality of slots therein equal in number to the slots in the truncated conical part with the slots in the truncated conical part and the base plate in alignment is formed; the flexible vanes are inserted from inside the truncated conical part through the slots therein with the bottom portion of the vanes in the slots in the base plat

Abstract: Void-free thermoplastic polymer slabs suitable for conversion into articles by shaping in the solid phase are produced by a method which comprises:(a) placing deformable mold rings on a heat-transmitting endless belt at regular spacings, suitably by cementing the mold rings to the belt; and(b) forming polymer slabs by moving the belt at staged intervals to successively:(i) fill a mold ring from said melt dispensing means while the ring is resting on said belt;(ii) place said filled mold ring under compression between two heated platens at at least one station;(iii) subsequently placing said filled mold ring under compression between cooled platens at a multiplicity of cooling stations; and(iv) removing the cooled molded article, sufficiently solidified to maintain its shape, from the mold after it leaves the last of said cooling stations.

Abstract: A method of making plastic aspheric lenses by casting a liquid lens monomer in a container having the aspheric curve present on the bottom of the container, polymerizing the lens monomer to form a transparent solid having an aspheric optical surface formed within the container and cutting a second optical surface on the solid lens material with the container supporting the lens material during the cutting and polishing operation.