Abstract: Disclosed is a two-piece golf ball and methods for its production. The ball comprises a core having a central portion of a cross-linked, hard, resilient material and having a soft, deformable outer layer. Balls comprising the novel cores and a conventional cover material having playability properties approaching or exceeding thread-wound balata covered balls. The core is preferably manufactured by surface treating a slug of a suitable, curable elastomer composition with a cure altering agent, and molding the slug under conditions to produce a spherical core having a hardness gradient in its surface layers.

Abstract: The process provides for depositing, on a non-adhesive support, a thread of a fluid material for gasket manufacture from a nozzle that is displaced above the support along a path coinciding with the gasket layout, with subsequent curing of the fluid material. According to the invention, a stiff, wirelike reinforcement is placed on the support before deposition, the reinforcement corresponding in shape to the outline of the gasket that is to be manufactured, and having an adhesive surface with respect to the fluid material of the gasket, so that the subsequently deposited thread of fluid material incorporates the reinforcement and becomes bonded to it. The invention also relates to the product obtained by the process.

Abstract: Process for forming a polymeric layer on a substrate comprises placing a substrate to be coated in a mold having a removable lid, injecting a liquid monomer into the mold and into contact with the surface of the substrate to be coated, holding the substrate in place in said mold prior to curing said monomer, radiation curing the liquid monomer, releasing the hold on said substrate prior to significant shrinkage of the curing liquid monomer, and venting said mold to atmospheric pressure at the portion of the mold remote from the surface of the substrate being coated and prior to significant shrinkage of said liquid monomer whereby the substrate moves toward the removable lid. Thereafter, the substrate, which now has a polymeric layer affixed thereto, is removed from the mold.

Abstract: A method for manufacturing a decorative molding having an outer surface layer with a round peripheral edge, comprising preparing a desired shape of decorative base plate which has an outer decorative layer and a mounting surface of a plastic layer which shrinks when heated, pouring thermo-setting liquid plastic onto the outer surface of the decorative layer of the base plate to coat the outer surface with liquid plastic, and then heating the liquid plastic to cure the same and heating the plastic layer of the base plate so that a predetermined amount of shrinkage of the plastic layer takes place.

Abstract: A process for making at least a single-faced, write and/or read optical disk having a sub-layer with a smooth or high-resolution featured surface and the opaque, substantially flat substrate includes the steps of interjecting between the opaque, substantially flat substrate and a transparent, highly polished or featured master mold, a thin layer of viscous composition which is radiation-curable to a solid plastic without undergoing significant shrinkage. The layer of viscous composition is irradiated through the transparent mold to cure the composition to a solid plastic sub-layer having the desired smooth or high-resolution featured surface. After irradiation of the composition, the master mold is removed, leaving the cured plastic sub-layer adhered to the substrate. The substrate is preferably metal, such as aluminum, and the master is preferably glass with an etched featured surface thereon.

Abstract: A method of making a molded circuit board includes forming a polymer base with a channel and an intersecting through-hole. The base is conductively coated by means of vacuum deposition to establish a circuit line. After the conductive coating is removed everywhere except the channel and the through-hole, a further conductive material is provided on the coating. The base is subsequently stress relieved and planarized.

Abstract: A method for adjusting blocks in the height which comprises laying over the top sides of the blocks an amount of a material which is hardenable and bindable thereon, with a height which is higher than the difference between said predetermined height and the actual height of the block under consideration, and levelling thereafter said material over said block sides before hardening thereof until the total block height formed by the sum of said block height and said material height, substantially corresponds to said predetermined height.

Abstract: A process for making an encapsulated metal oxide varistor package comprises pressing the varistor powder mixture into a disc, sintering the pressed disc, followed by slow cooling to room temperature.The sintered disc is acid etched and a fritted-silver electrode applied on each side of the disc or in the alternative an aluminum coating is arc sprayed on each side of the disk followed by an arc sprayed copper coating on top of the aluminum coating. The fritted-silver electrode coating is heated to 660.degree. C. and slow cooled to room temperature. Sn-coated copper leads are soldered on the electroded disc of either electrode process and the assembly is encapsulated in resilient epoxy resin to form the encapsulated metal oxide varistor package.

Abstract: The apparatus and method for processing steel strand wire cable and the like for use in prestressed concrete is disclosed in which the outer surface of the cable produced has a substantial pure rust or hydrated oxide coating thereon enabling the cable to be utilized immediately in concrete configurations to thereby produce substantially higher flexural strengths in prestressed concrete than heretofore in the prior art. The apparatus and method specifically encompasses the use of ultrasonic cleaning equipment which causes cavitation cleaning effects in the liquid medium through which the cable passes during its cleaning process. In effect, the ultrasonic cleaning "catalyzes" the chemical redox reactions by removing all surface inhibitors and reducing reactant diffusion barriers thus accelerating surface wetting of the strand cable with H.sub.2 O and O.sub.2, such that the rusting chemical reactions can occur spontaneously. The dominant bond developed between the steel and concrete is chemical.

Abstract: An impervious article of plastic material including a reinforcing frame member imperviously sealed within the plastic material which forms an outer covering thereof, is obtained by disposing the reinforcing frame member within a channel formed in shock resistant thermoplastic material, by heating a portion of the shock resistant thermoplastic material on outer sides thereof opposite sides defining the channel in which the reinforcing member is disposed, and over an area near an open portion of the channel to at least the softening point of the shock resistant plastic material, and then injecting a compatible plastic material substantially resistant to cracking under stress onto the outer sides of the thermoplastic material and over the open part of the channel in which the reinforcing member is disposed.

Abstract: A shaped article having a synthetic resinous body and a thin fluoropolymer weld layer on its surface is formed by a process which comprises heating a heat conductive metallic core member, forming a thin fluoropolymer weld layer on the surface of the core member, treating the exposed surface of the fluoropolymer layer, forming a synthetic resinous body on the outer, treated surface of the fluoropolymer layer and removing the core member, such as by dissolving. In the shaped article thus produced, a thin fluoropolymer weld layer is formed on the surface of the synthetic resinous body, and the thickness of the fluoropolymer coating can be reduced. This permits the production of shaped articles at low cost and having high mechanical strength, even for complicated shapes. According to the invention, it is possible to produce articles having complex shapes such as corrosion resistant vessels, molds having good release characteristics, and so forth, at a comparatively low cost.

Abstract: Aromatic polymer materials, such as polyethersulphone, polysulphone or polycarbonates in granular or porous forms with a solvent such as acetone or butanone. The resultant mixture is thereafter compressed and compounded to significantly increase its density producing a pre-form substantially free of large irregular voids. The preform is then capable of being formed in a foamed structure under heat.

Abstract: A method for lining a high pressure pipeline with a tubular plastic liner. After depressurizing, purging and cleaning the pipeline is broken into discrete sections each of which is to receive a liner segment. The sections are reamed to remove obstructions which might damage the liner and a close-fitting liner segment is drawn into each section. Each liner segment is fixed at opposed ends of respective pipeline sections to prevent longitudinal movement of the segments. Bleeder holes are provided through the pipeline walls at opposed ends of each pipeline section. After the pipeline sections are reconnected to reform the pipeline, a relatively warm, pressurized fluid is pumped through the pipeline to radially expand each liner segment against the inner walls of the pipeline, thus evacuating the spaces between liner segments and pipeline sections by forcing air, water and other impurities through the bleeder holes.

Abstract: A method of providing a dam in a loading coil case for the blocking of an encapsulant solutions penetration into the cable beyond a desired distance by inserting, via a hypodermic needle, a quantity of encapsulant activator at the desired site of a dam. The encapsulant upon contacting the activator jells very rapidly preventing the remaining encapsulant from draining into the cable.

Abstract: A fleece is employed for the distribution of casting resin over a component surface to be sealed. Prior to the introduction of the casting resin, pressure is applied on the fleece with a heated stamp in order to smoothen the fleece. Through increased temperature of the stamp, or through a solvent, the fleece can be readily cemented together with the component surface. It is thus ensured that the fleece rests uniformly on the entire component surface to promote a favorable distribution of the casting resin.

Abstract: A large multi-cavity mold is loaded with a plurality of horizontal radially leaded capacitors. The closed mold grips the leads. A top knock-out pin pushes each component body downward a predetermined degree so that all the bodies are left in about the same position within the corresponding mold cavity. A bottom knock-out pin then pushes each component body upward only slightly above the cavity center so that upon its withdrawal, the programmed lead wire stresses cause the bodies to spring back just to the mold cavity center position. Molding resin is then introduced into the cavities. The incidence of show-throughs is greatly reduced.

Abstract: The invention relates to a fused cast block useful in the construction of steel making furnaces, the block comprising a refractory oxide-based material having embedded therein a steel member which extends over the greater part of the length of the block and emerges from the block on the outer face of the latter, the steel member being embedded in the block in the course of molding the latter and having a cross-section of suitable shape and surface area to impart to the composite block an apparent thermal conductivity at between 500.degree. and 1000.degree. C. of at least 8 Kcal. m./m.sup.2..degree.C. hr.

Abstract: A method for fabricating a plastic electrical insulator having a fiberglass-reinforced plastic core rod and a plurality of insulator discs disposed thereon. The insulator discs are formed of a plastic molding compound which is especially suited for outdoor use. In accordance with the invention, the insulator rod is disposed in, and passes through, a mold which, when closed, is filled with the plastic molding compound for forming the insulator discs. The separation plane of the mold is situated near the outermost edge of each disc. Subsequent insulator discs are individually formed so as to partially overlap a previously molded insulator disc.

Abstract: This invention relates to the sealing of heated enclosures wherein the enclosure is provided with an opening (16) allowing access to the interior of the enclosure. A means for heating the enclosure and a means for closing (22) the access opening (16) are also provided. A compliant sealing material (26) disposed about the periphery of the access opening (16) is between the enclosure (10) and the closing means (22). A thermosetting material is intermixed with the sealing material (26) such that when the heating means heats the enclosure (10) the thermosetting material allows the sealing material (26) to be permanently molded to the shape of the closing means (18). A method of sealing a heatable enclosure (10) having an access opening (16) and a door (18) closing the enclosure (10) is also provided.

Abstract: An elongated tool handle has a solid wood shaft member and a molded, tool holding section molded directly to the wood at the tool end portion of the shaft member. The tool holding section is composed of a high impact material which is effective to secure a tool in place on the tool holding section. The tool holding section includes a volumetric mass of high impact material which gives off an amount of heat in its molten condition effective to drive moisture out of kiln dried wood. The wood of the shaft member has an amount of moisture sufficient to maintain the natural handle strength characteristics of the wood with the tool holding end section molded directly thereto. When the tool having an eye for the reception of the handle is placed over the molded, tool holding section, a slight outward expansion occurs in the material behind the tool head. A novel method is required to produce the tool handle with a molded tool holding section molded directly to a wood shaft.

Abstract: A method of applying a protective shield to a drill pipe tool joint including positioning a centering hub on the end of the tool joint, positioning a bifurcated mold around the tool joint, the mold having a rearward end engaging the drill pipe and a forward end engaging the hub thereby centering the mold on the tool joint, the internal diameter of the mold being greater than the external diameter of the tool joint providing an annular cavity defining the preselected shape of the protective shield, injecting liquid plastic material through an opening in the mold to fill the annular cavity, allowing the material to solidify, and removing the mold hub.

Abstract: A pencil, in particular for cosmetic purposes, is made by casting a stick composition into a tubular body, which forms the shaft of the pencil and is preferably seamless, in such a way that a ready-to-use exposed stick point is formed during casting.The shaft may be of wood or plastics. In the case of a wooden shaft, a solid wooden rod of twice the shaft length may be bored out and otherwise worked and then separated along a central plane transverse to the axis of the rod to form a pair of shafts into which the stick composition can subsequently be cast.

Abstract: The apparatus to practice the method of this invention is particularly effective in repairing underground gasoline storage tanks which have fractures or perforations directly underneath the filler pipe. A boring and injection tool projects down the filler pipe and perforates and seals adjacent the bottom of the storage tank. A soil stabilizer is injected into the area adjacent and exterior of the underground storage tank. The chemicals project into the pea gravel surrounding the tank and polymerize or solidify to stop infiltration or exfiltration. A sanding tool is next utilized to remove the glaze from the interior of the fiber glass tank. Water is evacuated from the tank and an air jet cleaning tool is utilized to remove the film of water from the area to be repaired. Next, an epoxy injection tool is utilized to deposit epoxy over the area to be repaired. Epoxy solidifies to the inner wall of the tank repairing the perforated or fractured area.

Abstract: Thermoforming, utilized for making articles from sheets of thermoplastic ins, does not always yield articles having desired strength properties. It has been suggested that both thermoplastic and thermosetting layers be used to making the articles stronger. However it was virtually impossible to bond the layers together. A process is provided herein for obtaining that bond.

Abstract: A preform is made by casting a copolyester polymer elastomer into a block. While the block is solidifying, pressure is supplied to the central portion thereof. After a block is formed, it is annealed and a precompression force is applied thereto sufficient to compress the block to an extent greater than thirty percent of the original dimension of the block as measured parallel to the precompression force. In one embodiment a cushioning unit using the block is made by placing a pair of multi-apertured metal plates on opposite sides of the block with projections on the plates extending against the block and applying a second precompression force to the block and plates sufficient to cause the copolyester polymer elastomer to flow into the apertures in the plates and form a mechanical bond between the block and the plates.

Abstract: Friction or antifriction material for use in brakes, clutches, bearings and the like is shaped and cured in a mold containing a mixture of a substantially non-electrically conducting heat bondable friction or antifriction material composite with at least one electrically conductive material dispersed throughout the mixture. The mold is closed to confine the mixture and at least two electrodes are placed opposite sides of and electrically connected with the mixture. An electrical potential is applied to the electrodes to pass an electric current substantially throughout the mixture to effect resistance heating, shaping and curing of the mixture within the mold. The heat input to the mixture is monitored to control the total heat input to a predetermined value required for effecting shaping and curing of the mixture. The maximum electric current passed through the mixture can also be controlled.

Abstract: A method of making a pre-cast concrete building panel wherein a sheet of hardboard is soaked in water, and while it is still wet, it is covered with a thin skin of concrete and there is formed a peripheral edge region of concrete to embed the hardboard edges. The subsequent drying out of the concrete and hardboard has the effect of binding together the hard-board and concrete, and pre-stressing the concrete.

Abstract: A process for making and assembling a rotary regenerator comprising a ceramic core adapted to rotate upon its central axis and a ring gear surrounding the periphery of the core for purposes of driving the core rotatably including preparing and forming a yieldable compliant ring sandwiched between the ring gear and the periphery of the core to prevent stresses in the core caused by differential rates of expansion of the core and the ring during operation of the regenerator in a gas turbine engine and during processing of the regenerator and the regenerator drive ring.

Abstract: A process for molding in situ a polystyrene foam structure with a relatively rigid thermoplastic sheet covering a portion of the surface of the polystyrene foam. The thermoplastic sheet is cut and folded into proper shape and a heat-activated adhesive applied to the inside surface. The folded sheet is inserted into the female cavity of a mold which is then closed. Expandable polystyrene is injected into the interior of the folded sheet and heated to expand the polystyrene against the sheet and the adhesive is heat-activated to bond the sheet and polystyrene.

Abstract: This invention is directed toward making hollow racquet ball balls. This is accomplished by molding a mass of vulcanizable elastic material to hollow semi-spherical form and heating the bulk of the material substantially fully to vulcanize it while simultaneously cooling a portion around the full edge so it is only partially vulcanized at the edge area thereof. Then two of such semi-spherical forms have the edges thereof abutted under some pressure to force the uncured edges together, and heat is then applied to the uncured edges of each half to fully vulcanize them and bind them together to form a unitary seamless ball thereform.Apparatus for forming the balls includes mold means defining a hollow semi-spherical cavity with a cooling chamber being provided at the open edge of the cavity that defines an edge of the formed hollow half sphere whereby a cooling medium can be circulated at the edge to prevent vulcanization thereof while the remaining part of the hollow half sphere is heated and vulcanized.

Abstract: A composite molded article composed of a backing layer of fiber-reinforced thermosetting resin and an outer layer of a thermoplastic resin which is mechanically interlocked to the backing layer through the fiber reinforcement. In fabrication, a layer of fibrous material impregnated with an uncured thermosetting resin is placed in a mold and a molten thermoplastic resin is injected into the mold. The heat of the thermoplastic resin serves to cure the thermosetting resin and the resulting composite article has a rigid, high strength backing formed of the reinforced thermosetting resin and has a smooth thermoplastic outer surface which is receptive to surface finishes.

Abstract: A method of bonding a polyamide plastics material to a rubber composition comprises heating the polyamide plastics material to soften at least its surface, contacting the softened surface with a rubber composition and allowing the polyamide plastics material to cool in contact with the rubber composition. The plastic-rubber composite produced by this method may be used in applications in which hitherto rubber-metal composites have been used, of which the following is a specification.

Abstract: The method comprises applying on the surface of each of the parts a thin layer of a curable first mixture containing a first resin which cures slowly and is slightly exothermic and has a good adherence to said surfaces. A curable second mixture is then introduced in a space defined by the layers of the first mixture in the final position of the two parts. The second mixture contains a second resin which cures rapidly and is sufficiently exothermic to promote the curing of the first resin and normally has after curing a poor adherence to said surfaces but a good adherence to the first resin.

Abstract: A refractory pipe fitting has a wall body comprising an inner hollow layer of a synthetic resin, an outer layer made of a refractory, non-metallic, inorganic material, and an intermediate layer made of a flexible material and interposed between the inner and outer layers. Such a pipe fitting can be manufactured by preparing beforehand a composite body comprising an inner layer and an outer layer combined together in an integral manner, placing the composite body in an outer mold, and by filling the gap formed between the outer mold and the composite body with a mixture in a fluid form of a refractory material and water.

Abstract: A substantially solid industrial polyurethane tire/wheel assembly where said polyurethane is prepared by reacting (A) a curative of 1,3-propane diol with a prepolymer of diphenylmethane-4,4'-diisocyanate and a polymeric polyol or (B) a curative complex of 4,4'-methylene dianiline with a prepolymer of a diisocyanate selected from diphenylmethane-4,4'-diisocyanate and toluene diisocyanate with a polymeric polyether polyol. It is an important feature of this invention that the selection of reactants involved, for the dianiline complex, a partial substitution of the polyether polyol with a polyether-ester polyol.

Abstract: The invention is a molding process adapted for the production of plumbing fixtures, such as a toilet whose functional surfaces are resistant to erosion by moving water wherein a ceramic shell forms a liner having external surfaces and the functional surfaces of the plumbing fixture. In the case of the toilet the ceramic shell includes a bowl, a siphon trap and a water flush ring. The molding process includes the steps of coating the external surfaces of the ceramic shell with a layer of resilient material and then suspending the ceramic shell upside down within a female mold member having internal surfaces so that the internal surfaces of the female mold member are slightly spaced from the external surfaces of the ceramic shell thereby leaving a gap between the internal surfaces of the female mold member and the external surfaces of the ceramic shell.

Abstract: A method of making grinding wheel mounts by molding a central hub onto a thermoset plastic abrasive disc is provided. An aromatic polycarbonate thermoplastic resin is molded to form a hub on a cured thermoset plastic abrasive disc. It is believed that the polycarbonate forms both a mechanical and chemical bond with the thermoset plastic to provide an efficient method of producing grinding wheels.

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: An end portion of a bundle of thread-like bodies to be set is dipped into a solidifiable liquid. At least a part of said bundle, adjacent to the predetermined level of the solidifiable liquid, is contacted with a specific liquid or gas which substantially prevents wicking of said solidifiable liquid along said thread-like bodies due to capillary action. The solidifiable liquid is not drawn up through the bundle beyond predetermined level of the solidifiable liquid, and solidified at the predetermined level.

Abstract: A shaft seal of the type including a metal case and a polytetrafluoroethylene sealing element, is provided with an auxiliary sealing lip by providing a radial flange of the metal case with a plurality of circumferentially spaced-apart apertures therethrough and molding an annular filler ring of synthetic rubber in the space between the sealing element and the metal case such that the rubber also flows through the apertures to the other side of the radial flange of the metal case and forms an auxiliary lip there. The filler ring chemically bonds to the metal case and mechanically bonds to the sealing element to lock the sealing element in place while also forming an auxiliary lip.

Abstract: Fluoroelastomers, including ultra high temperature, thermally stable fluoroelastomers, are bonded to a metal backing member by (a) compounding the fluoroelastomers with CaO, (b) curing the fluoroelastomers in contact with a pretreated surface of the metal member, and (c) postcuring the fluoroelastomers/metal unit at elevated temperatures.

Abstract: A protected easy-open metal end for containers is disclosed that contains a scoreline which defines on the central portion of the end a removable panel portion and a residual lip portion. A layer of synthetic resin hot melt material is deposited on one of the central panel surfaces opposite the scoreline, whereupon after the hot melt is solidified, the end is post heated to effect softening of the hot melt so that the metal end surface is wetted thereby. The resultant bond between the hot melt and the metal end is so great that severing of the removable panel from the end effects corresponding severing of the hot melt layer to provide protective hot melt layers on the edges of each of the panel and the residual lip portions. The hot melt layer may be applied to the same or the opposite central panel surface that contains the scoreline, or on both surfaces to provide two-side protection.

Abstract: A method of producing a moulded plastic-rubber composite comprising injection or transfer moulding a thermoplastic high pressure polymerized ethylene polymer so that it is brought, in a molten state, into contact with a prevulcanized rubber component containing up to 55 per cent by volume of a rubbery olefin polymer.The plastic-rubber composite produced by this method may be used in applications in which hitherto rubber-metal composites have been used, for example valve diaphragms, tire valve bodies, shock absorbers, engine mountings, vibration dampers, compression springs, torsion bushes, flexible drive couplings etc., of which the following is a specification.

Abstract: Chemical tablets for insertion into settling tanks and the like to dissolve solid waste material are formed in a tablet making press having a female die section which is charged with chemical in powder form. One end of an elongated strip of water soluble paper, having a heat and pressure activated adhesive coating on one surface extends between the female die and the male die carried by the press ram and is advanced in timed relation to the motion of the press. The male die section has a sharpened edge and is heated. As it moves into contact with the female die section it cuts out a separator from the sheet strip and adheres it to the tablet as it is formed. A plurality of such tablets are stacked in a cylindrical container with the separators disposed between adjacent tablets to prevent the tablets from sticking together. In use, the tablet with the separator is thrown into the settling tank and the paper separator is dissolved along with the other solid waste material.

Abstract: The method includes the steps of cleaning, priming, and coating pipe segments with a bituminous composition. The coated pipe segments are wrapped and carefully handled so as not to disturb the bituminous coating. Wire reinforcing cages are formed around the pipe segments and the individual pipe segments are then loaded into individual mold cars positioned end-to-end upon a first railway track assembly. The cars are then translated onto a first transfer car, which rides on a second track means, and are conveyed to a third railway track assembly comprising a plurality of parallel sets of rails. The mold cars are transferred abreast from the transfer car onto the third railway track assembly, filled with a cementitious weight coating material and fed into a drying kiln whereby the cementitious weight coating cures at least until the cement becomes self-supporting.

Abstract: A process for bonding a glass fiber reinforced plastic to a ferro-cement ucture to improve impact strength of the ferro-cement structure comprising the steps curing the ferro-cement mortar; acid etching the mortar on the side of the ferro-cement mortar to which the glass fiber reinforced plastic is to be bonded, rinsing the mortar, drying the mortar, applying a coat of adhesive to the mortar and attaching the glass fiber reinforced plastic to the bonded mortar surface. The adhesive may be partially cured if desired.

Abstract: A method of making a compressed wood product such as a building panel from raw wood. Tree length logs are cut to convenient lengths, debarked and dried, and then placed in a mold where they are immersed in suitable liquid adhesive and compressed to a dimension smaller than that finally required. The logs are then allowed to expand while still immersed in the adhesive, and are then again compressed to the final desired thickness of the panel. The logs are then subjected to elevated temperature to harden the adhesive, preferably while expansion of the logs is prevented. The invention also comprises special apparatus for carrying out the process, and particularly a mobile platform for carrying the logs and forming part of the mold, and a cover and clamp means for maintaining pressure on the wood.

Abstract: A method for producing a completed base cap for a plastic package sealing a semi-conductor therein includes the steps of forming the initial body of a plastic base cap including a centrally located hollow recess on one side thereof, placing lead frames on said base cap body in such a manner that the terminal end portions of said individual leads rest on the peripheral land of said base cap body surrounding said central recess, and forming outer side sections to the base cap including a step shoulder on the top side thereof by molding the same integrally with said lead frame and said initial body such that an intermediate portion of each of said leads adjacent their inner terminal end portions is embedded within said outer side sections of the base cap. A liquid honing step is provided on the base cap shoulder after the formation thereof, and to the inner terminal end portions of the leads.

Abstract: A composite structure comprises an unsaturated hydrocarbon rubber, polychloroprene or a chloroprene/hydrocarbon copolymer bonded without an adhesive layer to a polymer being a reaction product of at least one aliphatic dihydric alcohol and at least one aromatic compound having two acidic groups attached to the aromatic nucleus, or to an elastoplastic linear block copolymer having at least one block of this reaction product.A method of making this structure comprises treating the rubber surface to be bonded with concentrated nitric acid, hypochlorous acid or a hypochlorous acid generator, melting at least the surface of the polymer to be bonded, and solidifying the polymer in contact with the rubber.The invention provides a polyester/rubber structure conveniently without an adhesive interlayer and the structure is useful in applications requiring properties of polyesters and rubbers, for example belting, hose and tires.

Abstract: A method for improving the adhering ability of a vulcanized rubber surface by treating said surface with a solution of iodine isocyanate or a mixed solution of iodine isocyanate and iodine to provide a high adhering ability to said surface.The thus treated vulcanized rubber surface can be adhered strongly to other vulcanized rubber or the other various materials by contacting these materials tightly using an adhesive or without using an adhesive.