Abstract: A method for producing a lid device for a wide-mouthed container which comprises a lid body having an opening of a predetermined shape, and a closure member made of a soft synthetic resin for closing the opening of the lid body. According to the method, the lid body and a vapor impervious film are placed between a first mold body and a second mold body with the film located on the side of the second mold body. The first mold body has a closure forming cavity, whereas the second mold body has a tab forming cavity. A fluid synthetic resin is injected under pressure from the side of the first mold body to fill the closure forming cavity. The resin is caused to break through the film to fill the tab forming cavity, thereby forming a pull tab integral with the closure member.

Abstract: Injected fluid plastic material directed to a predetermined side of a film section that is inserted into a mold cavity by utilizing a mold that includes a first mold part with a first mold-cavity section and a second mold part with a second mold-cavity section, a gate with a gate region, and a multitude of specific flow channels in the first mold-cavity section for directing injected plastic material away from the gate region; placing the film section in the second mold-cavity section so that the film section covers an extensive region of both the specific flow channels and the thin mold-cavity region and so that the film section does not cover a first segment of each of the specific flow channels which are closest to the gate region, but does cover a second segment of each of the specific flow channels which is a continuation the first segment of each of the specific flow channels; and injecting the fluid plastic material into the mold-cavity, so that the fluid plastic material flows away form the gate regio

Abstract: A composite style wheel, and method and apparatus for making the same, including a metal wheel mounting disc and a rim secured thereto adapted to receive a tire thereon, and a composite plastic ornamental overlay covering at least part of the outboard face of the disc and/or rim. The overlay includes a molded in-situ body of relatively high density resilient urethane plastic material permanently affixed to the disc and/or rim and a plastic insert having a weight-to-volume ratio much less than that of the body plastic material. At least the major portion of the insert is disposed radially outwardly from the overlay, aperture wheel mounting and the overlay body plastic material covers the insert so as to completely embed the same in the composite overlay to thereby hide the insert from view and assist in securement thereof to the wheel. The overlay body is cast and cured against the wheel metal with the insert pre-secured thereto.

Abstract: A multilayer molded article including a resin body and a skin material having little or no wrinkles or breakage in the skin material is molded by molding a resin melt and the skin material in the mold while removing the air trapped between the skin material and the mold.

Abstract: A method for repairing voids in a finished urethane foam product having a typical backing insert or retainer wall, the method including the steps of forming a hole through the retainer wall adjacent the void; inserting a small elastomeric sheath through the hole into the void; injecting a urethane or silicone elastomer into the sheath to fill same to conform to the void; and sealing off the hole with a suitable plug which may be sanded flush with the retainer wall outer surface.

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 for providing a coating upon a metal small or the like through the use of an injection molding process includes the use of a resilient, molded insert. The shell is positioned within a mold receptor such that a void is defined between the outer surface of the shell and the inner surface of the mold receptor. A hardenable material is injected into this void, thereby coating the outer surface of the shell. In order to prevent distortion or other damage to the shell due to pressure exerted within the mold, a thin, resilient and substantially flat insert is placed upon the inner surface of the shell. A male mold member engages the insert during the molding process, thereby compressing it. The insert may be formed from a solidifiable material introduced in liquid form into a master shell which then receives the male mold member.

Abstract: A method attaches small plastic parts securely in a defined position on compression molded parts consisting substantially of bonded or synthetic resin bound natural fibers or chips. The parts are compression molded into the desired shape in a compression mold from a preformed, loose layer of a mixture of at least one of natural fibers and chips and of binder introduced into the compression mold, while undergoing a setting reaction of the binder and a volume reduction of the layer. During the compression molding operation, at least one clearance or thin portion, smaller than the small plastic part, is formed in the wall of the compression molded part at the fastening point of the small plastic part on the compression molded part. Thereafter, a direct form-fitting injection molding of the small plastic part or parts onto the wall of the compression molded part at the fastening point is carried out.

Abstract: A method of making an oil seal (10) having two separate annular lips (62, 64) formed by splitting a single lip liner blank (12). The lip liner blank is an annular wafer having an annular groove (14) formed on one side (15) of the wafer at the point on the wafer where the wafer is intended to be split into two annular pieces (49, 50). A mold (32) is loaded with the lip liner blank (12), a prep ring of elastomeric material (43) and a seal case (b 44) and then closed thereby clamping the prep ring and wafer between upper and lower dies (40 and 36) of the mold. In the molding step the prep ring and wafer are heated and compressed causing the prep ring to become molten as it flows over the wafer. The molten elastomeric material enters the groove and pressure exerted by the elastomeric material against the groove splits the wafer into two annular pieces (49, 50). A first annular piece (49) is displaced in the mold to the desired location of the excluder lip (64).

Abstract: A press is provided for simultaneously pressing and piercing an object. The piercing means moves from a sheathed to unsheathed position in response to compressive pressure. The piercing means are normally biased in the sheathed position by a bias means. Methods and apparatus for piercing an object are disclosed. The press can be used to produce a pierced dispensing device having a compression coating by (a) charging to a die mold a quantity of powder to be compressed; (b) delivering to the die mold an unpierced dispensing device core; (c) charging to the die mold an additional quantity of powder to be compressed; and (d) substantially simultaneously (i) compressing the elements within the die mold to produce a compression coating, and (ii) piercing the compression coating. The compression coating can comprise, for example, a loading dose or a semipermeable membrane.

Abstract: A molded resin casing of an electronic part equipped with a flat cable and internally accommodating a board on which are formed electric conductor patterns slidingly contacted by contacts of a slider of the electronic part. A flexible board having various electric conductor patterns formed on a synthetic resin film is used as the board, the flexible board is formed integral with a flat cable including a synthetic resin film on which are formed electric conductor patterns electrically connected to the aforementioned various electric conductor patterns, and when the molded resin casing is molded by injecting a molten synthetic resin, the flexible board is inserted in such a manner that the electric conductor patterns are exposed within the casing, thereby integrating the flexible board and synthetic resin casing, with the flat cable extending outwardly from a side portion of the synthetic resin casing.

Abstract: Producing an encapsulated glazing unit having a weather-stable film on an exposed surface of the gasket. There is provided a two-part mold whose sections cooperate to define a mold cavity for receiving the peripheral margins of the transparent glazing unit upon which the gasket is to be formed. A sheet of the weather-stable film is positioned over the mold section having the portion of the cavity which defines the surface to which the film is to be applied. With the mold closed, a flowable gasket forming material is injected into the mold cavity behind the film to deform the film into conformity with the mold surface. As the gasket cures in situ, the film fuses to its surface. The encapsulated unit is removed from the mold and the excess film is trimmed from around the gasket.

Abstract: An endless belt comprising a belt main body prepared from a liquid castable elastomeric material, a reinforcing fabric providing over the surface of the main body, and a shock absorbing layer of elastomeric material formed between the main body and the fabric. The belt is in the form of a flat belt or a belt having teeth or projections on at least one side thereof, has improved bending resistance and is operable with diminished noise. The belt is prepareed by a process comprising the steps of forming a shock absorbing layer of elastomeric material over the surface of a reinforcing fabric, fitting the fabric to one of an inner die and an outer die with the layer facing the other die, and pouring or injecting a liquid castable elastomeric material into a space between the fabric and the other die for molding.

Abstract: A mold for manufacturing a skin covered foamed plastic article, with which it is possible to place the skin cover at a desired position, without spoiling or damaging the skin cover, such that the skin covered foamed plastic article of a desired shape without any deficiencies such as wrinkles and dents can easily be manufactured. The mold includes an upper mold; and a lower mold, to be assembled with the upper mold in order to form a cavity in which a liquid foam resin undergoes foaming process to become the pad member, over which a skin cover is to be placed, the lower mold including at least one windows at which the skin cover can be pushed outward by pressure of the liquid foam resin.

Abstract: In a concrete column supporting an overhead load and having a base end resting on a surface, a process of strengthening the column to increase its ability to withstand atypical physical loading accompanying an earthquake, involving the steps of defining a work area about the surface of the column to which the strengthening is to be applied, the work area defined by circumferential marginal edges arranged in spaced-apart relation; overwrapping the work area with at least one layer of high-strength, stretchable fibers wherein the fibers are oriented at an angle to the vertical axis of the column; applying a coat of hardenable material, having a modulus at least as great as that of the fibers, over the layer of fibers to form a hard outer shell thereover; and, injecting a quantity of a hardenable, low-shrink liquid under the layer of fibers and over the surface of the work area in an amount sufficient to cause the fibers to undergo stretching from about 1/2% to about 4% of their elongation.

Abstract: A multi-layer molded article including a thermoplastic resin body having a plurality of ribs and/or bosses on one side and a layer of a foam which is laminated on the side of the thermoplastic resin body having ribs and/or bosses is produced by a press molding method. The method involves the steps of supplying a foam between upper and lower halves of a mold, one of which has plurality of slits and/or holes corresponding to the ribs and/or bosses to be formed, supplying a quantity of a plasticized thermoplastic resin melt between the already supplied foam and the half of the mold not having any slit or hole, moving at least one half of the mold during supplying the thermoplastic resin or just after completion of supply of the thermoplastic resin to press mold the thermoplastic resin so that the plasticized thermoplastic resin breaks at least a part of areas of the foam on the slits and/or holes of the half of the mold to flow into the slits and/or holes and to form the ribs and/or bosses.

Abstract: Fiber reinforced molded plastic articles, without fiber readout surface defects, are prepared in either resin transfer molding or reinforced reaction injection molding processes, by disposing a surface finishing film across the mold cavity prior to the insertion of the fiber preform and the injection of the curable polymeric precursor materials, thereby producing a finished article wherein the surface finishing film is bonded to the surface of the article filling the areas between those fibers near the surface which would otherwise cause fiber readout.

Abstract: A method of manufacturing a bag for containing liquid, the bag provided with an outlet tube. The method entails seam welding the outlet tube between two superposed bag walls, placing the bag and tube combination between the blocks of a mold, each block having confronting recesses of a particular shape and then injecting molding plastic material to fill these recesses. The injected material forms a collar which completely surrounds the tube and adjacent bag material. The bag film material on either side of the tube is melted to itself and to the tube wall and the collar is thereby securely attached in an encircling configuration thereby to preclude leakage. The tube may be a part of tap or other outlet fitting such as a push pull tap.

Abstract: Coated plastic products are prepared by chemically bonding a protective coating material to at least a portion of the surface of a plastic substrate, by disposing a web of a protective coating material over the cavity of a mold, and thereafter injecting polymeric precursor materials into the mold behind the web thereby conforming the web to the surface of the mold cavity. As the polymeric precursor materials react in situ to form the plastic substrate, they also chemically bond to the protective coating material.

Abstract: A method of producing a synthetic resin made article having a porous elastic member, which is useful as an air duct opening/closing damper adaptable in air conditions for automobiles, including the steps of:placing a porous elastic member in position against the inner wall surface of one of the opposing segments of an injection mold splittable into two or more segments;closing said injection mold and compressing said porous elastic member by the clamping pressure;casting a synthetic molding resin along the surface of said porous elastic member; andapplying a dwell pressure of a preset level for a prescribed period of time to the synthetic resin injected into said mold, anda method of producing a synthetic resin made article having porous elastic members, which is useful as an air duct opening/closing damper adapted in air conditions for automobiles, which includes the steps of:placing the porous elastic members in position against the inner wall surfaces of each pair of opposing segments of an injection mold

Abstract: Deformable insulating films are used as mold liners in a compression molding process. The film delays the initial cooling of the preheated thermoplastic charge. The film also serves as a plastic charge carrier and convection barrier during transport of the plastic charge from a heating unit into the compression molding press.

Abstract: A method of producing a resin molded article composed of a base material of a synthetic resin and a surface layer provided on the surface of the base material as one body, which includes preparing a mold having a cavity with an end molding portion for molding the end portion of the resin molded article and a body molded portion for molding the body of the resin molded article, the width of the end molding portion being larger than that of the body molding portion. The surface layer is disposed within the cavity of the mold, while disposing molten synthetic resin for the base material on one side of the surface layer so as to be held in the cavity of the mold. The mold is then closed and compressed gas is injected into the molten synthetic resin within the end molding portion so as to expand the molten synthetic resin. Finally, the molten synthetic resin is cured in the cavity.

Abstract: An improved electrical fuse having axial leads (5) and comprising a fuse wire in a cylindrical sleeve (2) supported at its ends by lead carrying end caps (3) is coated over the length of the fuse body by an adherent insulating layer of plastic (7). Improved humidity resistance and mechanical strength are achieved and control of coating thickness is improved. Use of hot plastic for the adherent insulating layer (7) reflows solder joint (4) reducing instances of open or high resistance fuses which must be rejected. Also, the i.sup.2 t performance is significantly improved over other adherent coatings.

Abstract: Molded composites, useful for manufacturing for example entry way doors, furniture components, building decorative or structural components, etc., are produced by a process in which a substrate and surface finishing film are placed in a mold, the mold is closed, and reactive polymeric precursors are injected between the substrate and the surface finishing film. The injection pressure and the autogenous pressure incident to the curing of the reactive polymeric precursors deform the surface finishing film into intimate contact with a surface of the mold cavity, and simultaneously the polymeric precursors chemically bond to the surface finishing film.

Abstract: A magnetic disk recording/reproducing head device includes a slider member, a magnetic circuit, and a seal member. The slider member is made of a magnetic material and has a sliding surface opposing a recording/reproducing disk, both end portions in a direction parallel to the sliding surface. The slider member has a groove portion which is formed in one of the end portions to be parallel to the sliding surface. The magnetic circuit has a core member made of a magnetic material and fixed to the other of the end portions of the sliding member, a predetermined magnetic gap which is formed between the core member and the slider member, and has a coil which is wound around the core member. The seal member made of a material having an adhesive property upon melting and a shrinking property upon stiffening and sealed in the groove portion of the slider member so as to form an inwardly recessed tapered portion on part of the sliding surface corresponding to the groove portion.

Abstract: The seal ring is molded by positioning a frame or reinforcement in one part of an opened mold, and positioning a low friction material disc on a clamping surface of the same part of the mold. The mold is closed with a second part so that between 30% and 70% of the disc is clamped and squeezed between opposed surfaces of the mold parts, and the reinforcement or frame is held in position in the closed mold. A vacuum is drawn in the mold, and an elastomer is injected to form a body or lip connecting the reinforcement to the disc. The molded ring is removed from the mold and excess lip material and at least the portion of the disc which was clamped are cut off to form the finished seal ring. The low friction material disc can contain PTFE.

Abstract: A blade of an exposure control such as an iris control device or a shutter control device is provided for use in cameras. A sheet of a resin or metallic material configured as desired into the final blade form is placed in an injection molding machine which has a pin-forming cavity on one side of the sheet. The sheet is broken and penetrated at its portions where pins are to be formed and fixed, such that portions of the material of the sheet are deformed to project into the cavity. A molten resin is injected through a sprue formed on the opposite side of the sheet to the cavity so that the injected resin fills the cavity to form a pin in such a manner that the deformed and projected portion of the material of the sheet is embedded in the pin-forming resin. Another pin is formed on the other side of the sheet simultaneously with the first-mentioned pin in the same manner in the same die apparatus.

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 printed circuit is formed by conventional methods over an adhesive coating applied to a flexible high temperature withstandability disposable backing to form a flexible laminate which is positioned in a cavity of an injection mold to conform to surface variations. The printed circuit conductors are surrounded on three sides by molten plastic material injected into the mold cavity to embed the conductors in the respective surfaces of the molded plastic article, which surfaces are non-coplanar and adjoining and the conductors are continuous from one surface to the other. The bond strength of the adhesive is preferably high with regard to the backing and low with regard to the printed circuit conductors to permit adhesive and backing to be peeled away after molding, thereby providing a three diemensional printed circuit in, for example, a recessed area of a molded plastic housing part of electrical apparatus.

Abstract: An injection molding process for making a multiple layer, plastic structure. A plastic sleeve is placed and then enclosed in a mold cavity. A flowing heated plastic is conducted into the mold cavity, radially inside the sleeve, and forced radially outward against the sleeve. The flowing plastic forces the sleeve outward and forms, with the sleeve, an integrally bonded laminated structure. The mold is opened and the plastic structure is removed, and this structure may then be reformed to form a container particularly suitable for containing beverages, foods, cosmetics, pharmaceuticals and chemicals.

Abstract: The method includes printing a decorative design on a surface of a suitable support using a transferable ink; introducing this support into an injection mould in such a manner that, during injection, its surface carrying the decorative design faces the inside of the mould; and injecting into the mould a heated thermoplastics material for forming an object. To prevent the printed design from being deformed by molten thermoplastics material during injection, the method further includes introducing a separate film into the mould, before injection, in such a manner that it is applied against the surface of the support printed with the decorative design. The film is made of a material which bonds with the injected thermoplastics material and receives and retains the ink forming the decorative design, which separates from the support and deposits on the film during injection.

Abstract: A method of manufacture of pneumatic tires having a tread T with grooves therein in which the grooves are formed by use of cylindrical network grid 10. The grid 10 is filled with tread compound T, and is then located concentrically to surround a tire carcass assembly C to assemble the carcass to the tread. Other tire components such as sidewalls S are added to the carcass C with the grid in situ, and the assembled tire is then cured with grid in situ, the grid being subsequently stripped from the finished tire. Apparatus for above method include a tread mould body (23) having an inner mould surface (24) in which the closely fitting cylindrical network grid (10) is located. The grid (10) is separate from the mould body (23) and has at least one axial split therein to allow removal of the grid (10) from the finished tire.

Abstract: A process for producing a synthetic resin molded article having a pattern formed on its uneven surface, which comprises fitting a patterned film or sheet to a mold and injecting a thermoplastic resin, wherein said mold has engraved therein such an unevenness that said patterned film or sheet undergoes extension of from 5 to 120% upon resin injection, and said patterned film or sheet is a polycarbonate film or sheet having a thickness of from 0.1 to 1 mm. The resulting molded article has a clearly outlined pattern on the uneven surface.

Abstract: A synthetic resin molded article having good antistatic properties is disclosed, which is composed of a body of a synthetic resin (B) having a surface layer which is predominantly comprised of an antistatic polymer (A) and is integral with the body (B). The antistatic polymer (A) mainly composed of units of a quaternary ammonium base monomer of the formula: ##STR1##wherein R.sub.1 is H or methyl, R.sub.2 through R.sub.4 are H, unsubstituted or substituted (C.sub.1-9) alkyl, m is 1-10 and X.sup.- is an anion of a quaternizing agent. The molded article is made by forming a film of the antistatic polymer (A) on the molding surface of a casting mold, casting a polymerizable material to be formed into the synthetic resin (B) as the base material in the casting mold, and polymerizing the polymerizable material to form a body of the synthetic resin (B), simultaneously rendering the film of the polymer (A) integral with the body of the base material.

Abstract: A multilayer molded article having improved appearance and feeling is produced by wetting a skin material including a fabric or a thermoplastic resin sheet as an outermost layer with at least one liquid material which is water, an aqueous solution, a volatile material which is liquid in an ordinary state, or a solution including the volatile material as a medium, supplying the wet skin material between male and female molds, supplying a thermoplastic resin melt between the molds and closing the molds to form the multilayer molded article including the integrally adhered skin material and the thermoplastic resin.

Abstract: A method of applying end stop members by injection molding to a slide fastener having rows of coupling elements on opposed stringer tape edges, a predetermined length of each of these tape edges being held upright or substantially vertical to the plane of the tape web and embraced by end stops molded in place with that predetermined length of tape edges maintaining alignment with its neighboring contiguous tape edge outside the molded end stop.

Abstract: A climbing step and its manufacturing method. The climbing step which is installed on wall surfaces of a manhole, pier or the like for ascent and descent is arranged such that a part of the step is coated with a layer of synthetic resin, and a reflection plate including protruding portions for preventing slippage are formed in the synthetic resinous surface. The reflection plate is embedded in the resinous surface over the tread portion while causing the surface to be exposed.

Abstract: A multiwalled plastic container and method for making the same is disclosed having a barrier liner and an outer wall providing structural support for the liner. The container provides increased protection against separation of the liner and structural wall especially at the rim defining the opening of the container. This is accomplished by a wrap around liner lip construction wherein the liner extends from the inside surface of the structural wall around the top rim surface of the wall and downwardly depends therefrom along the outer surface of the structural wall. To downwardly depending leg of the liner lip is recessed within the outer wall surface providing adding protection against liner separation.

Abstract: A method is disclosed for making containers (40) in which a sheet of thermoplastic material (10) that is adapted to be formed into a pouch is introduced into a mold cavity (14). A molding compound (22) is also introduced into the mold cavity (14). The molding compound (22) is permitted to be bonded with the thermoplastic sheet (10) inside the mold cavity (14) to form a container port (20) in situ. The thermoplastic sheet (10) and bonded molding compound (22) are removed from the mold cavity (14) and the sheet carrying the port (20) formed from the bonded molding compound is folded and cut to form a container (40).

Abstract: A method for the production of a cage made of castable or injection moldable polymeric material for rolling elements of a rolling contact bearing whereby the cage has pockets for receiving the rolling elements and contains a porous lubricant carrier, and the pockets have perforated walls to provide a direct contact between the lubricant carrier and the rolling elements. The cage is made in an injection mold or casting mold provided with cores for forming the pockets, characterized in initially inserting the lubricant carrier (5,24) into the mold (1,19), then closing the mold (1,19) whereby the lubricant carrier is elastically deformed by the cores (12,35,36) and finally surrounding the lubricant carrier (5,24) with polymeric material except at its supporting surface (14,38) and its surfaces engaging the cores (12, 35, 36).

Abstract: A carbonizable body is formed by infusing a plurality of preoxidized, preferably stabilized by known processing to have about 17 to 30 weight percent oxygen, fibers prepared from pitch, in a non-polar liquid plasticizer, typically quinoline, capable of extracting a tarry leachate from the fibers. The infusion of the fibers in the plasticizer is continued for a sufficient time for a substantial amount of leachate to form on the surface of the fibers. The treated fibers are then consolidated or diffusion-bonded to one another or other fibers, as by orienting the treated fibers in a mold and subjecting them to isostatic pressing at relatively low temperatures and pressure. Further processing of the consolidated fibers with appropriate heat treatment in an inert atmosphere will produce a carbonized bulk product with higher values of Young's modulus for the carbonized material than have been previously achieved at such carbonization temperatures.

Abstract: A carbonizable body is formed by infusing a plurality of preoxidized, preferably stabilized by known processing to have about 9 to 14 weight percent oxygen, polyacrylonitrile fibers in a polar liquid plasticizer, preferably water, capable of extracting a tarry leachate from the fibers. The infusion of the fibers in the plasticizer is continued for a sufficient time for a substantial amount of leachate to form on the surface of the fibers, and are then consolidated or diffusion-bonded to one another or other fibers, as by orienting the treated fibers in a mold and subjecting them to isostatic pressing at relatively low temperatures and pressure. Further processing of the consolidated fibers with appropriate heat treatment in an inert atmosphere will produce a carbonized bulk product with higher values of Young's modulus for the carbonized material than have been previously achieved at such carbonization temperatures.

Abstract: The invention provides a preform for a resin transfer molding process and a preform core for same. The invention further provides a resin transfer molding process employing such preform. A surface portion of the core having a concavity therein, the core comprises a flexible web secured to its surface forming a convexity over such concavity. The convexity formed by the web is deformable into the concavity during the resin transfer molding operation, but prior to the molding operation is sufficiently firm to support, without substantial deformation, oriented continuous fibers applied under tension onto the surface of the core.

Abstract: An apparatus for molding a sleeve on a corrugated pipe having an inner wall and fusion-bond ridges. Two clamps can close to engage several of the ridges. One to three of the ridges project into a molding space between the clamps. A core is inserted into the pipe and closes the molding space. Hot pressurized resin softens and collapses the projected ridges and fusion bonds the pipe to the sleeve portion of the molding space.

Abstract: A contact device comprises a resiliently deformable member having two opposite surface regions, and strips of conductive material bonded to the deformable member at one of its two opposite surface regions. The strips of conductive material are of substantially uniform width, substantially parallel to each other and substantially uniformly spaced from each other. The width and spacing of the strips are less than the width and spacing of the terminal areas of the conductor runs that are to be connected by means of the contact device, so that each terminal area contacts at least two strips of the contact device.

Abstract: A mold assembly for making fluid seals. The mold includes an outside diameter surface on a fixed part and a seal flange support surface on another portion of the fixed part. A seal casing with a shouldered mounting flange having major and minor outside diameters and a radial flange is positioned in the fixed mold part. A movable mold member includes an upper, outer cylindrical surface for engaging the inside surface of the casing major diameter to form a flash barrier which moves during mold closure. Both the fixed mold part and the movable mold part include inwardly directed surfaces defining the mold cavity; the flange support is apertured for the elastomer to flow from the seal body-forming part of the cavity to the heel gasket-forming part of the cavity. The heel-forming cavity part lies between the lower part of the inside surface of the mold and the outer surface of the casing minor diameter.

Abstract: A method of molding a sleeve on a corrugated pipe consisting of an inner wall and fusion-bond ridges. Two clamps can close to engage several of the ridges. One to three of the ridges project into a molding space between the clamps. A core is inserted into pipe and closes the molding space. Hot pressurized resin softens and collapses the projected ridges and fusion bonds the pipe to the sleeve portion of the molding space.

Abstract: A device is provided for forming a plastic weld, to repair a crack in a plastic article or join two plastic parts. The device comprises a barrel having an internal chamber. A nozzle is part of the barrel and forms a restrictive orifice outlet. Plastic filler rod can be forced by drive rolls into the chamber through an inlet. A heater coil is provided to heat the barrel. In use, the drive rolls are actuated to fill the chamber with filler plastic and generate a high pressure (e.g. 2500 psi). Concurrently, the heater coil heats the plastic in the chamber to a molten state. The molten plastic is forcefully ejected through the orifice outlet. To effect the weld, the hot tip of the nozzle is buried in the workpiece and drawn along the crack; it plasticizes the weld area plastic as it moves along. At the same time, the molten filler plastic is jetted into the molten weld area plastic and forcefully intermixed therewith to generate a competent bead.

Abstract: A plastics article, for example a container lid, in which a blank 3 of sheet material is incorporated, as a label or diffusion barrier, as the article is moulded is manufactured in an injection mould the mould cavity of which contains a recess 7 into which the blank is received prior to injection of the plastics material. The blank is dropped from holder means externally of the mould cavity, preferably during relative closing movement between the mould halves 5, 6 and is caused to enter into the recess as it falls. The blank may be held in a guide track 12 or chute directed down into the mould cavity and be restrained by a stop 13 from falling until required to do so. Air may be applied to the blank as it falls to direct it into the recess.

Abstract: A shaft seal (and method for making the same) of the type having an annular elastomeric body, a molded lip, and the molded lip having a liner of sintered polytetrafluoroethylene bonded thereto. The elastomer is molded simultaneously with the polytetrafluoroethylene liner being formed and bonded to the elastomer. The method for making the seal employs the same mold used to make common, molded lip elastomeric seals.