Sequential formation of portion on same mold or a preform surface

A method and apparatus is disclosed for making a combined needle and catheter of the type in which the needle is used to lead the end of the catheter thereon into a body cavity and, after insertion, is withdrawn through the catheter with most of the catheter remaining in the body. To form the catheter,...     

A method of manufacturing a heat exchanger comprises temporarily suporting a number of tubes in a first mould using a plurality of removable tube plates. The first mould is then filled with a molten, low melting alloy. After the alloy has set, the assembly is removed from the first mould and the tube...     

Method for applying an elastic band around the cuff of an elastic glove which includes extruding a stripe of elastomeric material around the cuff of the glove while on a glove form and curing the stripe. A tray carrying a row of glove forms, each having a glove thereon, is stopped to position one of...     

A method of manufacturing continuous ribbed pipes of thermoplastic resin material comprises the following successive steps. A length of pipe is injection moulded in a mould cavity between male and female moulds, the latter being shaped to provide integral ribbing on the outer surface of the pipe. After...     

Transportation apparatus, including an endless handrail and drive therefor. The handrail drive includes traction and pressure rollers disposed in driving engagement with the handrail. At least certain of the traction rollers each includes tire and hub portions formed of first and second integrally bonded...     

Improved insulation system for cryogenic vessels wherein substantially uniform stress levels under loads are maintained in various parts of the foam insulating material layers applied to the wall structures of such vessels and methods for applying foam insulating materials to the said vessel wall structures.

An injection molding nozzle and a method for using the same for the central injection molding of thermoplastic materials consisting of a filling compound of any desired thermoplastic material and a surrounding cover layer consisting of a different thermoplastic composition.

This invention proposes a method for eliminating "sink" in molded glass fiber reinforced panels for automotive and other uses. Such panels are normally formed with integrally molded reinforcement shapes (ribs) and fastening locations (bosses), and a slight depression or "sink" occurs in the exposed panel...     

Buoyancy members in the form of a segment of a hollow cylinder are produced by providing a cylindrical mold having two longitudinally extending flanges spaced apart by not more than 180.degree.; forming a layer of fiber-filled uncured polymeric material on the surface of the mold between the flanges,...     

Process for coating foil material of any desired shape with an injectable and pressable mass which stabilizes the foil material. An initially planar heated foil material is pressed by means of a depressor against a movable mold member of an injection mold having a movable mold member and a stationary...     

Improved molded drag reduction coatings which inhibit the degradation of g reduction properties of high molecular weight polymers such as polyethylene oxide. The moldings incorporate compatible anti-oxidants and/or lubricants and plasticizers in amounts that do not significantly decrease the drag reduction...     

Method of molding granular polytetrafluoroethylene powder which comprises compressing the powder in a mold at a pressure of between about 10 and 50 bars to form a preform and subjecting the preform to isostatic molding at a pressure of between about 100 and 1000 bars.

A thermoplastic container having multilayered sidewalls is compression molded from a multilayer billet having a first and a second thermoplastic layer, the layers being so adapted that when the thermoplastic material of the layers is heated to the heat softened state and a compressive force is imposed...     

A bowling ball has a surface made from a material containing a minor quantity of functionally terminated liquid elastomer combined with a major quantity of resin-forming material reactive with the functional end groups of the elastomer, and has a greatly enhanced coefficient of friction against ordinary...     

A body having rubber material thereon is positioned on a lower member, and an upper member is moved toward the lower member, such relative movement causing tread-forming shoes to move to inward positions to form a tread on the rubber material. As an alternative, the upper and lower members may be brought...     

A laminate comprises an adherent in-mold thermoset coating composition on a thermoset polyester glass fiber substrate, the coating composition comprising essentially the reaction product of an unsaturated aliphatic fumarate polyester diol, a saturated polyester diol flexibilizer, a cross-linking aliphatic...     

Using a highly flowable silicone putty which can be combined with catalysts to set, dentures can be repaired and modified by flowing the putty onto the dentures, allowing it to set while in intimate contact therewith, removing the dentures from the set putty for effecting changes, and subsequently reinserting...     

Method for making a filter which comprises a plurality of closely juxtaposed tubes made of a filter material and packed tightly in a tubular envelope. Both ends of the tubes are initially closed. The envelope with the tubes is then dipped to a small depth into a hardenable substance, e.g. latex, which...     

A method for injection molding a product having a non-cellular skin layer and a cellular core portion. The method involves successive or simultaneous injection of a non-foamable resin material and a foamable resin material through a sprue bushing having an injection channel connected to the mold cavity...     

An improved semi-continuous method for making one-piece, integral hollow fiber artificial kidneys and other apparatus of the hollow fiber separatory type.

A method and apparatus for forming a thermoset in-the-mold coating on a hot, cured glass fiber reinforced thermoset resin substrate by (1) separating the mold halves slightly while maintaining a seal with the shear edge, (2) injecting an in-the-mold coating resin in a stream which flows parallel from...     

A method comprises in-mold coating on a molded thermoset polyester glass fiber substrate an in-mold coating composition at a pressure of from about 25 to 50 p.s.i. and at a temperature not in excess of about 150.degree. F. for from about 2 to 12 minutes, said in-mold coating composition comprising the...     

A process for making a plastic record including the ordered steps of placing a cake of transparent moldable plastic in a record press having grooves for impressing sound grooves into the plastic, placing on opaque sheet of material having a picture printed thereon on at least one side onto the cake in...     

A reinforcing cord is positioned in a mold cavity for reinforcing an annular article such as a tire by wrapping the cord on an annular spacer band which is supported on a mold core and then placed in the mold. The mold is charged with a liquid polyurethane reaction mixture to form an outer polymeric...     

A molding system and method are provided together with articles produced thereby wherein rapidly setting molding material is introduced into a mold and made to conform to the walls of the mold cavity by movement of the mold prior to the setting of the molding material. Precise automatic control is effected,...     

A method of connecting two cables where a reinforcing insulation layer is formed over a connection part of the conductors of the cables. A heat-shrinkable tube is provided on the reinforcing insulation layer by heating the heat-shrinkable tube to form a cable connection part. The cable connection part...     

A method for producing coated, molded, fiber-reinforced thermoset plastic articles having an adherent coating in heated matched metal molds. The coating composition includes (A) a blocked polyisocyanate which is the reaction product, essentially free of unreacted --NCO radicals, of e-caprolactam and...     

A process for the production of fibre-reinforced sheet material in indefinite lengths comprises a first rolling step wherein a curable dough of thermoplastic polymer containing reinforcing fibres is rolled onto one face of a band to form a first coating which is dried prior to a second rolling step wherein...     

A blood contacting layer and a blood contacting interface consisting of a solvent cast polyurethane alloyed with a filler-free silicone rubber. In the above, the alloy interface comprises an interpenetrating polymer network consisting of polyurethane and filler-free silicone rubber at the molecular level....     

A molding apparatus is provided for molding one or more liquid molding materials, such as thermoplastic or thermosetting resins and the like which are controllably flowed into a closed mold cavity wherein the instant rate of flow and pressure of the molding material are predeterminately varied during...     

An FRP molding can be in-mold coated using a one-component peroxide initiated composition of (a) a liquid crosslinkable composition having an average molecular weight of up to about 5,000, having a plurality of polymerizable ethylenic double bonds, being essentially free of active hydrogen atoms or being...     

A method and apparatus provided for manufacturing elastomer gloves having percentage elongation of at least 300%. In order to prevent excess deposits of the polymer latex in the areas of the tips of the fingers and the webs between the fingers when the hand-shaped molds are coated, by dipping, with the...     

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...     

Protective coating systems are reinforced by first laying a suitable mesh screen of plastic, metal or the equivalent on the surface to be protected. Thereafter, a thin layer of a coating composition, e.g., a latex cement, is poured over the mesh and allowed to set. In this operation the mesh is bonded...     

A molded plastic part having a plastic substrate and a firmly adherent coating thereon. The molded part is produced from a reactive plastic molding material as the substrate by coating the surface of a mold, prior to molding the part, with a coating composition containing a reaction promoter for the...     

A PVC roofing membrane cast from a plastisol has less than 1.5% shrinkage when held at 176.degree. F. (80.degree. C.) for six hours and remains flexible at -60.degree. F. (-51.degree. C.). The low shrinkage reduces tensions in the roofing membrane, simplifying the application of the membrane to a roof,...     

A method and apparatus provided for manufacturing elastomer gloves having percentage elongation of at least 300%. In order to prevent excess deposits of the polymer latex in the areas of the tips of the fingers and the webs between the fingers when the hand-shaped molds are coated, by dipping, with the...     

A plating mask of molded unitary configuration with electrolyte admitting openings held to very accurate position and dimension by a molding process in which the mask is formed between two separable molds with forms supported therebetween to exclude material from both mask penetrating and transverse...     

An FRP molding can be in-mold coated using a free radical peroxide initiated thermosetting composition of at least one polymerizable epoxy based oligomer having at least two acrylate groups, at least one copolymerizable ethylenically unsaturated monomer, at least one copolymerizable monoethylenically...     

A method for forming vials for levels wherein a barrel-shaped core is first molded from an opaque thermoplastic in a double-injection molding machine and has at least a pair of spaced annular ribs integral therewith. A transparent plastic vial is then molded about the core in the same machine. Thereafter,...     

An SMC (FRP) molding is coated with a minimum amount of an IMC composition by skewing one of the mold halves during the initial IMC molding cycle to effect a scissoring action, the fulcrum being at or about the IMC injection point or placement to spread or wipe the IMC over the surface of the SMC part...     

A technique for constructing inflated shell enclosures in which (1) cementing matrix and reinforcing material components are placed on an inflatable membrane before inflation except that one component, which is required for hardening the cementing matrix, is sprayed on after inflation, (2) the reinforcing...     

Tooth positioner comprising several integral tooth engaging portions formed of materials having different hardness, the harder portions of which assist in anchoring the tooth positioner in its proper position in the patient's mouth. Further, a method of making such tooth positioners by enclosing dental...     

This invention relates to a method of making a foam-containing structure which includes placing and suitably retaining a respective first shaped sheet in each of first and second complementary parts of an open mould. Each sheet includes at least one layer of fibrous material. A further respective shaped...     

A prosthesis for subcutaneous implantation in a patient comprising a flexible sac and a silicone gel contained within the sac. The wall of the sac is comprised of at least one continuous layer of silicone elastomer which substantially impedes the migration of said silicone gel from the sac.

A method of in-mold coating a molded article involve the formulation of in-mold coating compositions and molding compositions with polymerizable ethylenically unsaturated urea-urethane polymer dispersions.

A decorative emblem is formed by insertion of a decorative foil shape into a preformed bezel and encapsulating and bonding the foil to the bezel with a fluent, curable plastic material. After an initial casting of a measured amount of plastic onto the base of the bezel, the foil is inserted and seated....     

A bottle closure is formed by: forming a frusto-conical hollow sealing member having an open lower end, of a soft synthetic-resin, and disposing such member in a molding die defining a T-shaped cavity with an upper end of the member being projected into a horizontal portion of the cavity. A molten hard...     

An activity toy with which a child may create needle craft like textured designs using plastic or amorphous solid substances. In order to simulate the strands or nubs that create the textured design in neddle crafts a stand supported on a surface holds a screen having mesh spaces extending between the...     

Powdery coating agent, suitable for application in the in-mould coating technique, comprising as the main component, besides a curing catalyst and if desired other additives, a crystalline unsaturated polyester with a melting point of at least 40.degree. C., a degree of unsaturation of between 1 and...     

A method for controlling the dimensions of a hollow plastics product injection molded within the cooling cavity of a mold having a core section and a cavity section defining the cooling cavity therebetween and separated by a parting line comprising stabilizing the core section in the cooling cavity and...     

Improved surface characteristics of sheet molding compounds are obtained by employing defined amounts of resin, glass and filler in the formulation comprising the appearance side and the reinforcing side of molded objects.

A pearlized plastics mosaic article having a ceramic glaze thereover is made in a mold having a deep etched pattern of engravings to provide a relief casting having a pattern of grooves simulating the look of mosaic tiles. An ornamental mosaic finish is obtained by casting mosaic and background layers...     

A method of rotationally molding a multi-layered article. The outer layer is first rotationally molded and solidified. An inner polymer layer is fed into the mold cavity and an inner layer is rotationally molded to the inner surface of the outer layer. Preferably, the outer layer and inner layer are...     

The method of molding a pneumatic tire having a radially outer tread portion, a tire casing underlying the tread portion and a reinforcing cord belt interposed between the tread portion and casing in which the tread portion is spin cast and then partially cured in the mold, the reinforcing cord belt...     

In manufacturing a DC motor body (1) including a motor magnet (2), conventionally, a magnetized magnet (2) is fitted to one by one to the cylindrical molding core (11) and a motor body is injection-molded within a cavity formed between a motor body forming mold (10) and a cylindrical molding core (11)...     

A method of forming a double timing belt wherein a belt preform is firstly formed with teeth on one face thereof. The opposite face of the belt in which the tensile cord is embedded is provided with oppositely projecting teeth in accurate alignment with the teeth of the preform by a successive molding...     

Decorative facing and method for applying same are described. The facing comprises Portland cement, sand, and pigmented binder. The facing may be applied to various surface or molded into individual elements of various shapes and thicknesses. The facing is slow-cured and exhibits compressive strength...     

A butterfly valve comprises a substantially cylindrical casing (20) having an annular valve seat (A) on its inner peripheral surface, and a valve disk (44) disposed within the casing (20) and rotatable about an axis (35). The valve disk (44) is formed at an outer peripheral edge portion with an annular...     

This relates to laminated preforms, the method of forming such preforms and products which may be beneficially formed utilizing such preforms. Most particularly, this relates to a preform which has formed as part of the injection molding thereof two layers of barrier material which are disposed within...     

A process of making slabs for use as table tops, or other decorative purposes, comprising an array of individual stones arranged in mosaic patterns. A base of hard, essentially nonwarping wood is cut to the desired outline of the final slab and supported on a spacer member in a horizontal position above...     

A molding process for producing a molded plastic product with a resin coating layer formed on its surface, which comprises electrostatically coating a powdery resin composition on the inner surface of a mold, filling and molding a plastic material in the mold to form a molded plastic product, and plasticizing,...     

A pneumatic tire produced of elastomers, especially cast or injection molded polyurethanes has an inner body in which a reinforcement is embedded and anchored by means of holding ropes. The inner body may be provided as a closed tubular body and is encased by an outer body which accommodates a belt and...     

In a molding machine wherein in molding a molded article, the molded article is molded into a so-called sandwich shape in which the central portion of the molded article is molded with core layer resin and the outer surface of the core layer is wrapped with skin layer resin, a valve for changing over...     

Waste material is encapsulated by charging into a container which is then closed by a cover (11) having filling and vent port means sealed temporarily by a diaphragm (13), such as a metal foil. A nozzle device (20) makes push-fit connections with the port means and ruptures the diaphragm in making the...     

A marine drive water pump impeller (1) is provided for a marine rotary vane positive displacement water pump. A filament wound annular drive hub (3) is cured with resin polymer. A rubber annular base (6) having a plurality of flexible radial vanes (7), is molded in place around the drive hub (3). The...     

An injection molding machine for use with at least two melting and injector units includes a fixed die platen, a movable die platen, and fixed spars on which said movable die platen moved. The die platens mount half-mold parts of injection molds while the other half-mold parts are positioned on a prismatic...     

A process is disclosed for forming at least one thin substantially uniform fluid coating comprising polymeric film forming material on a cylindrical mandrel, solidifying the fluid coating to form a uniform solid coating and separating the uniform solid coating from the mandrel. The process may comprise...     

A valve for vehicle tires, in particular a snap-in valve, having a shell-like plastic material of a hardness in the condition as supplied of about 65 to 75 Shore A, which has a base portion for connection to a rim or the like and a valve cylinder having an external screwthread for a valve cap, wherein...     

A method of enclosing an object, such as an electronic component, within a homogeneous block of microporous thermal insulation material comprises charging a first predetermined amount of a loose microporous thermal insulation mixture into a die and compacting the insulation mixture into a block for supporting...     

A method of forming a multi-layered vessel by injection molding a multi-layered parison and subsequently blow-molding the parison to form the multi-layered vessel. The parison is formed having inner and outer wall layers and an intermediate gas barrier layer. The intermediate layer is positioned between...     

A method and an apparatus for forming a coating layer on a molded product formed in a split-type mold assembly, which assembly includes first and second dies supported for movement relative to each other and a shut-off pin for forming a perforation in the molded product. The shut-off pin is first caused...     

A dip molding process for making an integral article having a solid inner surface and a foamed outer cover in which a hot mold is dipped into a solid plastisol which is partially fused before being dipped into a foamable plastisol which is then formed, fused and bonded to the solid plastisol to form...     

Solder in a connection is kept from melting when applying an outer protective layer of high melting point plastic by first applying an inner layer of low melting point plastic.

An outer door handle, for example for a vehicle, includes a stationary casing fixed to the door and a handle member movably mounted on the door adjacent the case and connected to the opening mechanism of the door. In order to improve appearance of the handle while maintaining good physical strength,...     

A guide rail, and method of making same, for the guiding and/or tightening of chains that are used in internal-combustion engines, for example, for driving camshafts, auxiliaries or the like is disclosed. For reasons concerning weight and manufacturing, the guide rail consists of a plastic material and...     

A method of making precision low cost molds by applying a plurality of layers of material to a pattern. The method includes providing a pattern of the part to be formed; orienting the pattern on a surface plate in a molding dam; applying a release coating to the surfaces; applying a thin resin layer...     

An improved rotational molding method for making a laminated plastic structure of the type in which successive charges of particulate plastics are released in a mold cavity rotating in an oven to coalesce successively along the mold cavity wall after which the mold is removed from the oven for cooling....     

A method of making O-rings by depositing a filament of a liquid hot-melt material onto a rotating spindle, or directly upon the shank of a rotating fastener.

Method for tri-injecting a plurality of thermoplastic materials to mold an article having a layered wall structure using thermoplastic materials having different optimum processing temperatures including the maintenance of the optimum temperatures in flow paths individual to each material from its source...     

Apparatus for manufacturing plastic shells having decorative features thereon includes a combination mask and container unit that is joined to a known heated mold to deposit a first semi-cured deposit on the mold from supplies of material in the combination mask and container; the mask is configured...     

Apparatus and a process for manufacturing plastic shells having decorative features thereon includes a method for casting thermoplastic material against a heated mold by use of a combination mask and container unit (hereinafter referred to as the combination unit) that is joined to a known heated mold...     

A multi-level sealing method wherein an electrical element to be sealed is heated. Once heated, a quick curing first seal is applied to the electrical element thereby preventing the introduction of moisture, and other elements, into an electrical element as the seal cures. A second seal is applied, over...     

A roof flashing and method of making same in which both the collar and base member of the flashing are made of elastomeric material. The base member is molded first and has an opening therein surrounded by a stepped flange provided with a series of circumferential slots therein. The collar is molded...     

A method of fabricating a composite structure having at least one skin molecularly bonded to a core. A skin is provided of reinforcing fibrous material and a thermoplastic matrix. The skin is thermoformed to the general exterior shape of the composite strucutre. The skin is placed in a mold, and a core...     

Three dimensional mapping and modelling apparatus comprising apparatus for providing coordinate information with respect to a three-dimensional element, workstation apparatus arranged to receive the coordinate information from the providing apparatus and to permit manipulation of the coordinate information,...     

A process for preparing laminates of polyvinyl fluoride and at least one other fluoropolymer that are free from adhesive at the interface by dispersion coating a first film to form a second film and curing the second film at a temperature below the melting point of the first film.

A method for moulding an article wherein mould parts are adapted to be moved together under vacuum to cause moulding material to be evenly distributed around a reinforcement structure. A finish coating of paint or the like is applied to the article during the moulding process by coating the mould interior...     

A method of cyclic injection molding enables production of four or more products in each production cycle while the filling of each mold cavity may be separate and therefore may be fully controlled. Multicomponent products are molded in an injection molding system that includes a mold positioning system,...     

A process for making optical mirrors which includes making a rough plaster casting to about the desired shape of the mirror, with the casting having a rough surface, and then applying successive thin layers of polyester resin to the surface of the rough casting to form a finished casting having a smooth...     

A plastic product having a cross-laminated section including a first plastic layer and a second plastic layer is injection molded in a mold system that includes a first mold cavity with a first-layer-defining-mold-cavity-section and a second mold cavity with a second-layer-defining-mold-cavity-section...     

A substrate is initially moulded from a cross-linked polymeric material reinforced with glass fibres, the substrate is subsequently placed in a die in which a facing layer is first moulded, and on that layer are injected the ingredients for a foam padding material which adhere the substrate to the facing...     

A method of manufacturing polymer seals consisting of bonding together a combination of cured pre-polymers to form a single multi-layered seal of varying hardness urethane with at least one pre-polymer being a polyester based pre-polymer and at least one pre-polymer being a polyether-based prepolymer.

A mold 300 for making a member having at least one first section of a first material and at least one second section of a second material includes first and second plates or mold halves 332,334 adapted to cooperate with each other when positioned in opposing relationship along a mold-closing axis and...     

A method of constructing tubular spars, particularly spars for use on sailing vessels, includes the step of placing in a channel section mold, a layer or layers of fiber reinforced plastic material to form part of the periphery of the tubular spar. Side wall portions of the mold are then removed and...     

A dual charge compression molding method in which a first charge of a plastic material that will at least constitute the reinforcing means, i.e., the ribs and/or bosses, is first placed in the mold and compressed, the mold is then opened and a second charge of the plastic material is placed in the mold...     

The plate-like valve elements (10 and 20) of the microvalve are provided with a plurality of valve seats and, respectively, corresponding valve members. The sealing surfaces of a secondary valve element (10) are respectively formed by molding to copy the sealing faces of a primary valve element (20)...     

An ultra-thin, self-assembling molecular film has ordered amphiphilic molecules that are oriented relative to one another in two directions. The improved method of the present application makes it possible to form the film in a continuous fashion with the ordered molecules arranged in oriented crystals.

The cure rate or time of an in-mold coating composition is greatly enhanced by the use of a minor component by weight of a catalyst or initiator in the in-mold composition comprising essentially t-butyl peroxyisobutyrate.

The dimensions of an injected molded hollow plastic product are controlled and the separative force exerted against mold sections during molding of the product are reduced by injecting plastic material continuously from a gate into a mold cavity having flow channels extending through the cavity region...