Abstract: Disclosed are a motor casing made of a resin and a method of manufacturing such a motor casing. A bearing for rotatably supporting a core shaft of a rotor core is inserted into a bearing seat portion of the motor casing when the temperature of the resin material which forms the bearing seat portion is substantially at the glass transition temperature thereof or above, the resin material being cooled to a room temperature.

Abstract: A method of making a flanged pipe length includes flaring a metal pipe by rotating a grooved tool about the inside of the pipe and introducing a plastic tubular sleeve into the pipe. The tubular sleeve is subsequently heated and forced against the flanged portion of the metal pipe whereby the plastic material assumes a shape complementing the projections formed by the grooved tool.

Abstract: A method of forming a hose assembly (10) of the type adapted for carrying fuels and other corrosive fluids. An inner liner (16) of a fluorocarbon material is extruded. The inner liner (16) is then passed through a reservoir containing a dispersion including a fluorocarbon polymer material and a fluid. Glass fibers are then braided about the exterior of the inner liner (16) to form a braided layer (18) having the dispersion thereabout such that the dispersion penetrates the interstitial spaces of the braided layer (18). Subsequently, the assembly (10) is heated to remove the fluid. The assembly is then sintered to cure the fluorocarbon polymer material into a coating dispersed throughout the braided layer (18) and about the inner liner (16).

Abstract: A method of forming an immersion nozzle for continuous metal casting. The method includes the step of forming a porous refractory nozzle having channels formed in the outer surface thereof. The channels are jacketed with a positionally stable barrier. A metallic housing is formed to have an inner surface dimensioned to conform to the outer profile of the refractory nozzle and an orifice through one side. The refractory nozzle is inserted into the metallic housing with a cementitious mortar disposed therebetween and with the orifice aligned with one of the channels. The mortar then is dried to secure the refractory nozzle to the metallic housing.

Abstract: A method of manufacturing a hermetic sealing apparatus for two members rotating relative to each other includes placing an annular metal backup ring having an L-shaped cross section in a mold with a radially inward flange portion of the annular metal backup ring having a plurality of circumferentially spaced holes. The mold has a central core and the outer peripheral surface of the central core is provided with a spiral groove. A conical shaped PTFE resin material sheet for forming a second annular seal ring is placed in the mold. A rubber-like resilient material for forming a first annular seal ring is placed in the mold and subjected to pressure. The molding pressure deforms the second annular seal ring material so that it protrudes into the holes of the flange portion of the annular metal backup ring. This firmly secures and fixes the second annular seal ring between the first seal ring and the annular metal backup ring.

Abstract: The invention relates to a method for manufacturing a joint, in which method around the sections (14, 15) to be joined to each other sections of a sealing element (12, 13) are placed and the joint (16) is heated by a form (10). A reinforced plastic is used for the joining compound (12, 13), and sections (11a, 11b) of the form (10) are pressed, in a manner known per se, around the members (14, 15) surrounded by the reinforced plastic sealing member sections and to be joined to each other in the joint (16). The invention also relates to a joint manufactured by the aforementioned method.

Abstract: A catheter is provided which deters the backflow of blood between the insertion needle and the catheter cannula by forming the distal end of the catheter hub so as to restrict the inner diameter of the catheter cannula to a wiping fit with the engaged insertion needle. In a first embodiment the distal end of the catheter hub is pre-formed to its desired final inner dimension. The distal end of the hub is stretched to an oversize condition, the catheter cannula is attached to the hub, and the distal end of the catheter hub is heated, causing a stress relief of the previously stretched hub. The distal end of the catheter hub returns to its pre-formed dimension which will mechanically restrict the diameter of the catheter cannula at that point to form the wiping fit with the engaged needle.

Abstract: An improved infusion device is of the type which can be implanted for drug delivery within a patient's body, and supplied with infusate without the need for surgical removal. The infusion device has a housing forming a chamber and an entry port into the chamber. The entry port is closed by a septum. The septum has a convex top section extending from the housing, and a frusto-conical section which matingly engages a similarly shaped interior surface of the housing. The interior surface can be provided with a plurality of notches with which the septum engages by material flexure. This arrangement improves retention of the septum and operation of the infusion device, and permits advances in the method by which such devices are manufactured.

Abstract: A capillary flow cell in which a capillary (9) partially extends along the optical path of the cell and has its two end portions (12, 13) bent to achieve an essentially Z-shaped configuration. A template (1) has a central bore (2) in which the middle part (11) of the capillary (9) is positioned. A method of manufacture of this capillary flow cell including inserting a capillary in a central bore of a template, heating the capillary immediately outside the bore to soften the capillary material, and bending the two ends to achieve an essentially Z-shaped or U-shaped configuration.

Abstract: A paperboard laminate carbon for containing a liquid product. The innermost and outermost surfaces of the carton are coated with a polymer which is both liquid impermeable and heat sealable. One of the walls of the carton includes an aperture which is fitted with an improved one-piece plastic spout. The spout, prior to installation, includes one preformed flange which contacts one surface of the carton about an aperture in the carton wall. A truncated skirt having a maximum cross-section small enough to pass through the aperture in the carton wall without damaging either the skirt or the carton wall extends from one surface of the preformed flange. A second flange is formed from the truncated skirt after the skirt has been inserted through the aperture in the carton wall.Spout configurations which may be inserted from the exterior or the interior of the carton are disclosed.

Abstract: An over-the-needle catheter assembly in which a restriction of the inner diameter of the catheter tube is formed in the proximity of the needle hub. The restriction is formed by heating a portion of the catheter tube to the softening point of the catheter material, stretching the catheter tube to cause the heated portion of the catheter tube to tighten about an inner needle or mandrel, then releasing the stretching force to allow the stretched portion to relax, leaving a small gap between the inner wall of the catheter tube and the outer diameter of the insertion needle. The small gap is preferably sized to be on the order of the size of the diameter of blood cells to restrict the flow of liquids past the restriction and into the catheter hub.

Abstract: A method for flaring pipe liners. The method includes pushing against the end of a thermoplastic liner installed in a metal pipe with a first forming head and applying heat to cause said head to flare outwardly about an acute angle; and subsequently pushing against said end with a second forming head and applying heat to cause said end to bend into contact with said flange.

Abstract: A method of manufacturing a sealing apparatus. A rubber-like elastic material for forming a rubber-like elastic material sealing lip and a resin material for forming a resin sealing lip are placed within a mold for manufacturing a sealing apparatus by effecting vulcanization forming. The mold is clamped with contents placed therein, and the contents are pressurized and heated. During this process, a surface of the resin material is pressed by the forming pressure of the fluidized rubber-like elastic material against a thread formed on an inner wall surface the mold, thereby forming a thread groove on that surface of the resin material pressed against the thread.

Abstract: A method is shown for forming a flange on an end of a plastic pipe liner of the type used to line a tubular member. A reinforced disc having a rigid portion and an elastomeric portion is placed about the liner exterior and moved into position flush with the flanged end of the tubular member. A retaining ring is placed about the reinforced disc and the disc and liner exposed end are heated to render the materials malleable. A forming unit is then used to apply force to the liner to flow the liner into a reformed shape having a greater external diameter than the remainder of the liner. The forming operation also bonds the reinforced disc to the reformed liner end to further resist any tendency of the liner end to be retracted into the interior of the tubular member.

Abstract: A method of forming at the end portion of a thermoplastic material pipe in a pipe socket. The pipe end portion is molded around an annular sleeve onto which is bonded a sealing ring having an outer sealing ring adapted for sealing against the pipe end portion and an inner sealing ring, connected to the outer sealing ring, adapted for sealing against an outer surface of a spigot end of a connecting pipe introduced into the socket.

Abstract: A process of assembling a ski and a ski structure assembled according to the process. The ski includes a plurality of subassemblies which are attached by applying a thermoplastic material to each of the subassemblies; placing the thermoplastic surfaces of adjacent subassemblies together; heating the thermoplastic junction or junctions; and cooling the thermoplastic junction or junctions to thereby effect a weld. The process of assembling the ski permits the shape of the ski to be modified or at least one of the subassemblies to be removed and replaced by subsequent heating of at least the thermoplastic junctions. The use of glue to attach the subassemblies together is avoided to obtain the reversibility of the assembly of the subassemblies.

Abstract: Method of manufacturing a tube coupling body in a plastics material using injection moulding tooling. The body is formed with a cylindrical bore having enlarged end portions in a mould body and using removable cores. The cores form both the internal bore of the mould body and also end parts of the mould body so that once the cores are removed, end parts of the coupling body are revealed in the mould. While the end parts are still hot from the initial moulding operation, forming dies having tapering end cavities are pressed over the end parts of the moulding to form the end parts of the moulding with both external and corresponding internal tapered surfaces. The tapered internal surfaces of the end parts thus formed provide tapered cam surfaces for engaging the resilient arms of collets to be inserted in the coupling body to receive and lock tubes in the coupling body.

Abstract: An assembly of air heaters and reciprocally movable air driven staking tools is provided for use in the assembly of pieces using thermally softenable and pressure deformable studs. The air heaters and air driven staking tools are assembled in a supporting structure through which air is circulated to cool the staking tools to limit adhesion of hot softened material to the working face of each staking tool. The air heaters and air driven staking tools are individually selectable and controllable to meet the requirement of each workpiece to be hnot staked. The method of operating the hot staking assembly is also disclosed.

Abstract: A device containing a fluid material is sealed by sealant material placed essentially completely around the periphery of the device to join spaced apart first and second members of the device; and aperture is formed through the seal and the device interior is evacuated. Then fluid material is introduced into the device interior through the aperture and only a limited region of the device, confined substantially to the aperture is exposed to electromagnetic radiation from a laser or the like, to hermetically close the aperture when a photoreactive adhesive is injected into the aperture to cause the adhesive to solidify when contacted by the electromagnetic radiation. In an alternate embodiment, the aperture is filled with a plug of thermoplastic material, which is then selectively heat treated by a laser or the like to cause the plug to bind to the aperture boundary and hermetically enclose the fluid material.

Abstract: A method and apparatus are shown for lining a tubular member with an elastomeric liner having an outside diameter which is initially greater than the inside diameter of the tubular member and a length which is greater than the length of the tubular member. A length of the liner is reduced to a downsized outside diameter and inserted into the tubular member to be lined. The liner is allowed to expand to substantially its original outside diameter to thereby bond the liner within the tubular member, the liner opposite ends still extending outwardly from the opposing ends of the tubular member. The outside diameter of the liner opposite ends is then increased to approximately the outside diameter of the tubular member by heating and reforming that portion of the liner opposite ends which extends outwardly from the opposing ends of the tubular member.

Abstract: A method and apparatus for attaching an insert in an opening in a molded thermoplastic body. The insert includes a thermoplastic mounting portion which is fused with the thermoplastic material of the body. The insert is maintained in a spaed position from the opening during the heating portion of the molding cycle and positioned within the opening while the thermoplastic material is still sufficiently hot to fuse with the thermoplastic mounting portion of the insert.

Abstract: A method and an apparatus are provided for securing a bed of charcoal under pressure in a plastic material housing in the manufacture of charcoal filter canisters for gas masks. The bed of particulate charcoal is placed in the housing and covered with a retainer. A compactor is placed on the retainer and loaded to produce the desired compaction of the charcoal. An ultrasonic welder is then used to secure the retainer in place for one embodiment, a spring-loaded compactor is placed on top of the retainer and an ultrasonic nodal horn is placed over the compactor. The horn presses the compactor against the retainer with the necessary compressing force to compress the charcoal bed, while at the same time producing an ultrasonic weld around the periphery of the housing, welding the retainer in place. The compactor seats on a nodal point of the horn, so that ultrasonic vibrations are not transmitted from the horn through the compactor to the charcoal bed.

Abstract: In a method for forming an end portion of a plastic pipe wherein the end portion is transferred to softened state and the end portion is provided with an internal groove by axially displacing the pipe end portion in relation to a mould ring which is thereby introduced into the pipe end portion. After the forming of the pipe end portion the mould ring is left in the pipe end portion for forming a sealing ring therein. During the forming operation the pipe end portion is supported on a mandrel. In accordance with the invention the mould ring is displaced into the pipe end portion by displacing the ring along the mandrel while the pipe end portion is in its softened condition supported by the mandrel substantially without being displaced along the mandrel.

Abstract: A container or can having a body and end portion which include plastic free ends and which are joined and sealed by cooperatively curling the juxtaposed ends. The body portion has an opening surrounded by a free end suitable for curling. The container end portion has a generally flat or dish shaped central lid portion with a peripheral skirt having a free end adaptable to the container body free end and suitable for curling. The container body and end portions are joined by juxtaposing their free ends so that they form a double wall followed by curling with a curling tool to intimately engage the ends and concurrently curve the perimeters thereof to one another in a tightly curled configuration.

Abstract: A process for making filters with a non-bypassing peripheral seal which comprises heating a cylindrical filter housing to expand its internal diameter; inserting a filter disc that has a diameter larger than that of the internal diameter of the housing when cold; and allowing the assembly to cool.

Abstract: A method is disclosed for the manufacture of an electrofusion coupler, for connecting adjoining lengths of thermoplastics pipes, and which coupler takes the form of a sleeve of thermoplastics material, to receive adjoining ends of adjoining pipes, the sleeve having an electrical resistance heater embedded therein and extended around the sleeve. In the method, a plastics preform is wound with a resistance heating wire, while heating the wire, to melt the surface of the preform, or applying molten plastics to the preform in the vicinity where the wire runs onto the preform, in order to ensure that the heating wire is fully embedded in the preform. A pressing roller may be run over the preform surface before the molten plastics has solidified, in order to smooth over the molten plastics. The preform 10 is subsequently placed in an injection mould and an outer encapsulating jacket is injection moulded around the preform.

Abstract: A two-piece adapter for rotatably connecting two fluid transport members, the adapter including a stem for one of the members, and a connector (which may be for example a Luer connector) for the other member. The connector has a collar which is wrapped around the flange to capture the stem. The collar is deformed to wrap around the flange after the flange and the collar are joined. Preferably the adapter is made of a plastic, transparent material.

Abstract: A process for forming a plastic article, such as a container, involves heating at least one or more layers individually to temperatures below the melting point, immediately stacking two or more layers while retaining the peripheral portion of the layers and immediately forming the stacked layers into a plastic article which is then allowed to cool. Alternatively after stacking the layers, the stacked layers are immediately forged into a preform in a heated and lubricated mold and immediately thermoformed into a plastic article, which is then allowed to cool. The layers may be diverse (i.e. material, shape, molecular weight, additives, etc.) or similar and stacked so as to provide a layered angular orientation.

Abstract: A method of custom manufacturing of shoes at a specified heel height is disclosed and includes forming a positive impression mold of the foot from a negative impression mold made with the foot oriented at the specified heel height. A sold impression form is provided having an upper surface shaped to correspond to the lower surface of the sole of a shoe with the specified heel height. The positive impression mold is located with its lower surface separated from the upper surface of the sole impression form by a distance approximating the desired sole thickness, after which a settable material adapted to harden to form a suitable sole is introduced into the space between the positive impression mold and the sole impression form. The sole impression form is then removed from the sole and the desired upper materials are attached to the sole to generally conform to the shape of the positive impression mold.

Abstract: A method of joining a substrate, particularly a polymeric pipe for transporting fluids, e.g. natural gas and water, to an article which is not heat-recoverable and which comprises a conductive polymer composition. The article is heated by passing electrical current through the conductive polymer. The heated article makes direct contact with and fuses to the substrate, and is preferably a coupler which is used to join two pipes together. The conductive polymer preferably comprises carbon black dispersed in a sintered polymer, particularly ultra high molecular weight polyethylene, or carbon black dispersed in a very high molecular weight polymer, particularly polyethylene having a molecular weight greater than 150,000.

Abstract: Applique or similar object is simultaneously formed and affixed to a baseplate by juxtaposing a plate of contributing material adjacent the baseplate and forcing a punch entirely through the contributing material to shear the object from the plate of contributing material. The object, in turn, shears a slug from the baseplate, which is positioned against a die opening, forming an opening in the baseplate in which the object is retained by interference fit. The method may be used to affix objects from a contributing material that is either harder than or softer than the baseplate material.

Abstract: A multilayer compression-molded article produced by compression-molding a composite plastic material. The composite plastic material comprises a first synthetic resin and a second synthetic resin in which the first synthetic resin surrounds substantially the entire second synthetic resin. The compression-molded article comprises a first resin layer molded from the first synthetic resin and a second resin layer molded from the second synthetic resin in which the first resin layer surrounds substantially the entire second resin layer. The composite plastic material is obtained by an extrusion apparatus which intermittently extrudes the second synthetic resin via a subsidiary extrusion flow passage into a main extrusion flow passage in which the first synthetic resin flows.

Abstract: A method for producing a synthetic resin union joint, the method including the steps of forming a union nut having a screw portion and a union sleeve of an elastically softenable material, the union sleeve having a union swivel end and a connecting end, heating a length of the union nut at least equal to a thickness dimension of the flange part but not extending to the screw portion so as to elastically soften the length of the union nut, abutting one end of a truncated cone-shaped expansion guide with an end face of the union swivel end, shifting and enlarging the length of the union nut along the expansion guide so as to pass over the union swivel end and so that the union nut passes over the guide, and returning the length of the union nut to its original configuration due to a restoring force of the elastically softenable material so as to be positioned within the union swivel end and the connecting end.

Abstract: The invention provides a method of molding a plastics material comprising the steps of placing the material with a quantity of an appropriate catalyst in granular (including powdered) form into a hollow mold shell; suspending the mold in a mounting system enabling rotation in a plurality of directions whereby the powdered material, together with the catalyst, is able to flow over all the interior surfaces; containing the mold and mounting system within an oven and heating the mold therein while rotating the same; cooling the mold and subsequently withdrawing the molded article therefrom.

Abstract: A synthetic plastic bag for containing liquids, e.g., urine, has a plastic outlet tube. It is manufactured by a first step of seam welding the tube between two superposed bag walls. In a subsequent step, an encircling sleeve is slid over the tube to a position where it contains within it the portions of the bag walls on either side of the tube. Thirdly, this sleeve is compressed onto the tube by a crimping operation conducted with the crimping force applied in a direction substantially parallel to the plane in which the bag walls lie. The tube may be part of a tap or other outlet fitting such as a push-pull tap.

Abstract: A device and method to prevent delamination at load-bearing apertures in structural composite substrates is disclosed. The device is a composite reinforcing grommet having a hollow, generally tubular member of braided filaments impregnated with polymer. The member may be radially deformed for insertion into an aperture in a structural composite substrate and is then capable of being radially expanded to form flanges to secure the structural composite between the flanges. A method of reinforcing a substrate having an aperture therethrough including the step of cobonding a composite reinforcing grommet to a structural composite substrate is also disclosed.

Abstract: Assembling of two workpieces by the ultrasonic staking or riveting method comprises the providing of a first thermoplastic workpiece having an upstanding stud, an apertured second workpiece juxtaposed on the first workpiece so that the stud protrudes through the aperture of the first workpiece, and a horn applying ultrasonic energy to the upstanding, free end of the stud by forced contact between the stud end and the horn. The improvement comprises the application of ultrasonic energy to the horn during brief time periods which alternate with brief time periods during which the horn, while still in contact with the stud end, is substantially inactive.

Abstract: Method for mounting a plastic armature, particularly in the shape of a handle or an adapter designed to connect other structural parts, to a jar of frangible material like grass, ceramic, glass-ceramic, or the like by adhesively connecting the armature to the outer side of the jar, the armature comprising a shaped part which forms a positive interlock with a rim portion of the jar and the inner side thereof and thus secures the jar against dropping out from the armature upon a possible loosening of the adhesive connection, characterized in that an armature is used which comprises an extension of thermoplastic material which with projects inwardly over the rim of the jar when the armature is put into place, and in that during or after the making of the adhesive connection of the armature, the extension is softened by heating, deformed into the interlocking shaped part, and re-hardened by cooling.

Abstract: In a method for manufacturing a sealing ring with a sealing lip, the material forming the sealing lip is fabricated in plastically deformable condition into the shape of a column-like hollow body. Prior to solidification, the column-like hollow body is twisted between axially spaced cross-sectional planes. This forms return elements with hydrodynamic action. Subsequently, the hollow body is solidfied and its diameter is enlarged axially outside the region of the sealing lip and it is then secured in a sealing ring housing.

Abstract: An apparatus for forming an end portion of a plastic pipe wherein the end portion is transferred to softened state and the end portion is provided with an internal groove by axially displacing the pipe end portion in relation to a mould ring which is thereby introduced into the pipe end portion. After the forming of the pipe end portion the mould ring is left in the pipe end portion for forming a sealing ring therein. During the forming operation the pipe end portion is supported on a mandrel. In accordance with the invention the mould ring is displaced into the pipe end portion by displacing the ring along the mandrel while the pipe end portion is in its softened condition supported by the mandrel substantially without being displaced along the mandrel.

Abstract: A vehicle interior part such as a glove box door or console door and its method of manufacture includes an outer shell backed by foam material which is bonded to a mold insert that reinforces the part and defines an exposed back. The insert includes a peripheral edge spaced with respect to a continuously formed raw peripheral edge of the shell and further includes a flange portion that is post formed so as to be bonded to and located in a net out relationship with the raw edge to define a finished surface appearance.

Abstract: A gasket retaining cap member, and method of forming same, comprising an integral cap member having a downwardly extending annular flange forming an exterior cap wall and a downwardly extending annular retention wall spaced radially inward of the cap wall thereby forming a ring-shaped well therebetween into which a gasket member is placed and thereafter held securely in position by deformation of the retention wall. The method of forming the gasket retaining cap member comprises positioning the cap member, with the gasket placed inside, within a heat staking press which operates to stake deformation into the upper surface of the retention wall thereby causing the retention wall to partially overlie the gasket member and hold it securely in place.

Abstract: A process for mechanically bonding a sheet of rubber to a sheet of another, e.g. a reinforcing, material, and a composite article made by the process. A molded sheet of rubber having integral upstanding posts is assembled with the sheet of the other material in such a manner that the posts extend through openings in the sheet of the other material. The distal ends of the rubber posts are then reformed (preferably by heating) to shape or form the rubber posts into rivets which mechanically lock the rubber sheet and the sheet of other material together and provide good shear resistance. According to another embodiment of the present invention, the reinforcement material is a high melting temperature plastic which has an upstanding post and the molded rubber sheet and has openings therein. The plastic posts are reformed as with a laser to bond the plastic sheet to the rubber sheet.

Abstract: A dispenser for dispensing paste compositions comprising a piston movable in an emptying direction within a dispenser housing, and a stopper part for closing the piston adapted to be driven in sealing manner into the piston. A stopper seat is developed in the piston and the dispenser housing is evacuatable by an air vent zone located in the region of the stopper seat, the zone being defined by slots formed between the stopper seat and the stopper part which are interrupted by radial arms of the stopper part. The arms form two separate sections which lie one behind the other in axial direction, and which are separated from each other by a free space, and at least those arms which lie on a cross-sectional plane of one section are formed as tear-off arms.

Abstract: Fabric is glued to a foam cushion, while design lines are formed in the cushion, by pressing a hot, perforated die against a layered composition of foam, hot melt adhesive, and fabric. Protruding ridges in the die are heated to a higher temperature than the land area. Superheated steam is ejected through the perforations, causing the foam to melt and form the design lines, and causing the layer of adhesive to become molten. The composition is then cooled, for example by pulling air through it, to resolidify the adhesive and the molten foam under the ridges. The process is useful for forming automobile seats. It requires less labor than forming the design lines by sewing, and without damaging the fabric.

Abstract: The cross-linked plastic material is shaped in the softened state, for example, by blow-molding, deep-drawing, pressing, rolling, calendering or stretching and cooled below the softening range while retaining the thus formed shape.

Abstract: A method of securing terminals to a distributor cap and to the cap formed thereby. A molded thermoplastic distributor cap is provided which has bores formed in the towers of the cap. Die cast zinc terminals having ribs and recesses therebetween are partially inserted into the bores of the cap. With the terminals partially inserted into the cap they are engaged by an electrically heated head member which causes the terminals and cap material to heat up. When the cap material is heated to a flowable state the terminals are pushed into the cap and cap material is moved into the recesses to anchor the terminals in the cap. The terminals are provided with vent slots.

Abstract: A method of joining, repairing or reinforcing substrates, particularly polymeric pipes for transporting fluids, e.g. natural gas and water. The method makes use of an article, preferably a heat-recoverable article, which comprises a conductive polymer composition and which is heated to its recovery temperature by passing electrical current through the conductive polymer. Preferably the article is a heat-shrinkable coupler. The coupler may make direct contact with and fuse to the pipes, or there may be an insert between the coupler and the pipes. The article preferably comprises carbon black dispersed in either a sintered polymer, particularly ultra high molecular weight polyethylene or a very high molecular weight polymer, particularly polyethylene having a molecular weight greater than 150,000.

Abstract: An apparatus for the production of a synthetic resin skin uses a mold for forming at least two separate skin sections which are then joined prior or after a final heat treatment. The synthetic resin skin sections are produced in at least two separate mold members, and the skin sections are then caused to contact each other along determined faces or margins which are joined under light pressure. Any so-called selvage is easily removed after the joining which intimately bonds the skin sections to each other due to the curing of the synthetic resin.

Abstract: A small metal member (50) is secured to a surface (32) of a plastic member (30) by lock tabs (54) bent into a recess (34) in the surface (32), and the plastic material of a central boss (38) in the recess (34) is bulk deformed over ends (68) of the lock tabs (54) forming a recessed joint (70).