Abstract: A process for making a closure assembly includes placing a closure cap portion in a compression mold, introducing a melt of elastomer, pressing the melt into a septum against the cap and applying a foil barrier against the septum. The process may be performed in a rotary compression molding apparatus.

Abstract: Methods for making candles are disclosed, as are candles made using that method. A wick holder and wick are positioned at the bottom of a container. A sleeve/shroud is then positioned in the cavity to protect them during molding. Molten wax is poured into the cavity outside the sleeve. The wick is centered using the sleeve after the wax has been added. While the wax is only partially hardened the sleeve is then removed. Remaining molten wax then surrounds the wick.

Abstract: A method and apparatus for making plastic articles utilizing a plurality of tools, each of which is moved by cams and includes a nitrogen cylinder wherein provision is made for catastrophic overload prevention. For catastrophic overload prevention, one of the cams is supplied by a top plate and held in normal fixed position by a plurality of nitrogen cylinders. Abnormal movement of the top plate is detected and the machine is stopped. For predictive overload protection, a load cell is positioned at the off load position of one of the cams and any excessive load provides a signal for an alarm, interrupting the feeding of plastic charges and stopping the machine.

Abstract: The present invention includes processes and resulting structures for producing moisture absorbing desiccant entrained polymers. A polymer is caused to assume a molten state, typically by applying heat and melting the polymer. To achieve certain results in the hardened end product, such as rigidity and durability, the polymer normally acts as a moisture barrier in a solidified state, both before and after melting. A desiccating agent is blended into the polymer so that the desiccating agent is distributed within the polymer. A channeling agent is also blended into the polymer so that it is distributed within the polymer. Together, the polymer, desiccating agent and channeling agent create a blended mixture. The mixture is solidified so that the channeling agent forms passages in the mixture through which moisture is communicable to desiccating agent that is entrained within the mixture.

Abstract: A method is provided for forming a recyclable plastic container component with an integral preform. A preform is placed within a mold recess. The mold is closed to capture the preform, thereby forming a flow passage with a shape corresponding to contours of the container component. Plastic is injected into the flow passage under pressure. The injected plastic bonds to an edge portion of the preform. The molded component is then cooled and removed from the mold.

Abstract: Handling ability can be improved and operational defect at a time of integral formation with a rubber like elastic seal lip can be prevented by effecting a chamfering working to an edge portion of a conical washer like resin ring. In a method in which a conical washer like resin ring 40 is formed by conically cutting away an end surface 51 of a cylindrically formed resin material 50 with a predetermined thickness and the resin ring is utilized as a seal lip 3 by assembling the inner diameter end portion or outer diameter end portion with a device body, it is characterized in that a sharply projecting edge portion 47 on the side utilizing as the seal lip of the conical washer like resin ring 40 is subjected to chamfering working 45, 46. It is characterized in that the resin ring 40 is assembled with the device body having a rubber like elastic seal lip 2.

Abstract: Apparatus, method and sealing means for liquid urethane reaction mixture injection molding of a composite styled metal and plastic vehicle wheel wherein a metal wheel subassembly serves as a preform between the separable mold parts in the mold apparatus and which is united with the plastic body molding material to form the composite wheel. One of the mold parts has a mold cavity surface operable in mold closed condition to define with the outboard face of the wheel subassembly a mold cavity adapted to provide an ornamental configuration for an outboard face of the plastic body of the composite wheel. A gas permeable and liquid infiltratable mold sealing membrane has a first portion thereof communicating with ambient atmosphere externally of the mold cavity and a second portion thereof communicating with the mold cavity.

Abstract: In a primary molding step, a connector housing having a hood portion is molded. In a secondary molding step, an elastic seal ring is molded on an inner side of the hood portion. Through holes are formed in the connector housing in the primary molding step which allow an elastic material to flow therethrough from a seal ring-forming portion on the inner side of the hood portion to an outer side of the hood portion, and which retain part of the seal ring formed at the seal ring-forming portion when the elastic material is cured. An air reservoir portion is formed in a secondary mold, which communicates with outer open ends of the through holes in the connector housing in the secondary molding step.

Abstract: A method of manufacturing a waterproof connector housing and an apparatus for use in such method wherein an overflow preventing wall which is projected to joining direction of both a male metal mold and a female metal mold is formed around at an edge portion of space for forming a packing, after the overflow preventing wall and the housing are allowed to adhere in such a way that the overflow preventing wall presses the housing arranged between both the metal molds, the rubber material is injected into the space. It can be surely prevented the overflow of the rubber material from the space.

Abstract: A method of manufacturing a waterproof connector housing, that enables the formation of a uniform packing ring which is an integral part of the housing by engaging a hollow body of a housing with a trapezoidal engaging portion provided on a male mold, holding the housing by contacting tightly an inner wall of the hollow body with the trapezoidal engaging portion to align the center of the male mold with that of the housing, and injecting a rubber material into a packing ring forming space uniformly defined by one of both of the male and female mold through a rubber supply paths of the housing. The housing having the hollow body with tapered shoulder, a male mold having the trapezoidal engaging portion and a female mold beveled or thinned at the open edge are employed for implementing the method.

Abstract: An improved identification marker and method of assembling the marker is provided, which includes the steps of providing a glass vial and filling the glass vial with a quick curing liquid to a predetermined volume corresponding to at least the volume wherein the unfilled volume of the vial is equal to the displacement volume of an IC circuit hybrid and antenna. The IC circuit hybrid and antenna are placed in the vial so as to be entirely enveloped by the liquid. A cap is placed on the vial and the liquid is cured. Preferably, the cap is an anti-migration cap so that when the transponder is implanted in an animal, it prevents the transponder from sliding out.

Abstract: Closures for containers, such as cans and the like, wherein the closure is comprised of an end panel and a frame member which, preferably, are attached together during an insert-injection molding operation used for forming the frame member. Depending upon the respective materials, the attachment therebetween may comprise heat-bonding or adhesives and the like. The various end panels have a displaceable panel portion for providing an opening in the closure to provide access to the product(s) within the container. The various panel portions are defined by weakening lines, perforations or cut lines in the end panel and molded runners for "repairing" and/or sealing weakened or lanced portions of the end panels. The molded runners provide beam strength for protecting against excessive bulging during autoclave or other sterilization processes and against buckling during vacuum processing.

Abstract: A method for forming a liner in a closure for a container includes forming a plastic closure cap having a circular top wall portion and a depending annular skirt portion depending from the top wall portion, and depositing a quantity of moldable liner forming plastic material in the cap. A liner forming assembly which has a liner tip and a liner sleeve, the liner tip being axially movable relative to said liner sleeve, and the liner sleeve defining a plurality of circumferentially located, radially oriented venting channels positioned on an outer surface thereof, is advanced into the cap to engage the sleeve with the cap, adjacent to the venting channels, to define a liner space. The liner tip is advanced into the cap, relative to the liner sleeve, to compress a liner forming material to form the liner while restraining the flow of moldable plastic between the sleeve and the cap, and while venting gas out of the liner space through the venting channels.

Abstract: A method and apparatus for compression molding plastic articles including closures which includes providing coacting sets of tools including a first set for moving a core and core sleeve into engagement with a cavity mold on a second set of tooling. An actuator is provided between the first set of tooling and a fixed upper cam. The second set of tooling includes an associated actuator supporting the cavity mold and associated with a lower fixed cam. A nitrogen cylinder in the second set of tooling provides for control of the compression molding force. In a preferred form, a plurality of sets of tooling are provided in circumferentially spaced relation on a rotating turret supported by a central column. A common manifold supplies the pressure at accurately controlled pressure to each of the nitrogen cylinders. A control system is provided for monitoring and changing the pressure.

Abstract: Lip-type oil seals (10) having helical pumping ribs (40) are manufactured by preparing a molded foreproduct of the seal and by trimming a hat portion (62) to form a sharp sealing edge (32). Each of the pumping ribs (40) is configured to include a first section (50) of a uniform cross-section and a bilge-shaped second section (52). Trimming is made along a trim line (68) that intersects in between the length of the first sections (50) to ensure that a length of the first sections (50) is preserved between the sealing edge (32) and the second sections (52) regardless of the tolerance of positioning of a trimming knife. Oil seals having an improved initial static and dynamic sealing performance is obtained. The second sections (52) achieves a satisfactory pumping action even after a substantial wear has taken place.

Abstract: A process for manufacturing a cosmetic product, such as an antiperspirant or deodorant, in stick form includes steps for introducing the product into a container from which the product is dispensed by the user. The product is introduced into the container in molten form and thereafter cooled to produce a substantially solid stick of antiperspirant material. Thereafter, the product is compressed to remove gaseous elements therefrom.

Abstract: This is basically an Engineering design of a means to control the stability and or resistivity of certain materials subject to Cold Flow without materially decreasing the material's normal function. This does not require additional thickness and/or hardening which may increase the resistance of the material. This method overcomes these limitations. This is accomplished by my development of a system of encapsulation, adding certain types of fibers, or both as may be required. The subject material using this method can then be processed to meet specific pressures and resistivity. There are many uses for this method, for example this method can be used for constructing the cartilage for an artificial joint where it is desired to have a predetermined force for separation and yet have low resistivity to normal motion. Another example is to apply this method to plastic bearings and bushings in order to reduce cold flow with little or no change in resistivity.

Abstract: A conduit lining system and a method for lining conduits, particularly conduits in need of repair. The system includes a longitudinally extending liner, initially transversely curled in a pre-installation position but being capable of becoming uncurled in an installation position to form a longitudinally extending generally cylindrically shaped liner for placement adjacent an interior surface of a conduit to be lined or repaired. The liner has longitudinally extending locking edges which become mutually engaged as a torpedo-shaped member is inserted within the liner, while in the curled pre-installation position, and the member is moved longitudinally therethrough.

Abstract: The invention concerns a procedure for the manufacture of an assembled object intended for repeated assembling and disassembling, e.g. a tube (1) with matching cap (4), and a machine for the execution of this procedure. According to the invention the tube (1) and the cap (4) are cast in the same mould (7) end ejected simultaneously and assembled in the exact position they are to have when used. This can suitably be done by first casting the part (4), which at the boundary surface is placed outermost. When it has assumed its final shape, it serves as an independent mould when producing the other part (1). The first cast part (4) thus contributes to the securing of the core system (9, 10, 11) for the other part (1), whereby the wall thickness of this part can be made especially uniform and thin. The machine for the execution of the procedure can thus cast e.g. the assembled cap (4) and tube (1), and it can, therefore, also be adapted to perform an automatic filling, sealing and possibly stamping of the tube.

Abstract: A method and an apparatus for economically manufacturing gasketed closures is described. Gasket material is placed within the closure and subsequently reformed to provide a gasket profile capable of forming an effective seal when the closure is applied to a container. The gasket material may be deposited in the closure as a hot-melt or as a preformed cut-out. The deposited material is subsequently reformed to have a desired profile by inserting a compression punch or a roller into the closure. The invention is adapted for the use of non-PVC containing materials such as certain thermoplastic elastomer materials which are non-flowable in a molten state and which may have a viscosity index of greater than about 40 meter-grams torque at 175.degree. C. The gasket materials may optionally be foamed prior to reforming to create a finished gasket possessing a high density area more resistant to damage when the closure is applied to a container.

Abstract: A method and apparatus for compression molding plastic articles including closures which includes providing co-acting sets of tools including a first set for moving a core and core sleeve into engagement with a cavity mold on a second set of tooling. An actuator is provided between the first set of tooling and a fixed upper cam. The second set of tooling includes an associated actuator supporting the cavity mold and associated with a lower fixed cam. A nitrogen cylinder in the second set of tooling provides for control of the compression molding force. In a preferred form, a plurality of sets of tooling are provided in circumferentially spaced relation on a rotating turret supported by a central column. A common manifold supplies the pressure at accurately controlled pressure to each of the nitrogen cylinders. A control system is provided for monitoring and changing the pressure.

Abstract: A solid o/w-type cosmetic composition, a process for molding it, and a container used for aqueous-type solid cosmetics. The cosmetic composition comprises (a) a water-soluble solidifying agent selected from agar and gelatin, (b) an oil component and (c) water, and optionally, (d) a powder or (e) a water-soluble adhesive. The composition has superior characteristics inherent in an o/w-type cosmetic, while providing excellent usability and portability. The molding process comprises applying a water-carrying sheet material to the surface of the composition before solidification and releasing it after solidification. The container for an aqueous-type solid cosmetic composition is characterized by having a water-absorbing material secured to a receptacle of the container.

Abstract: A process for producing a container and closure assembly includes molding a preliminary container including a closed bottom portion, a body portion and a shoulder and neck portion. The shoulder and neck portion is separated from the body portion. An open ended second container is formed from the body portion, the second container having a rim at its open end and an encircling wall. The open end of the second container is then closed with a closure comprised of a cap and a cap liner. The cap liner has a weakened portion adapted to be broken by the cap. The cap or the cap liner are formed from the shoulder and neck portion of the preliminary container.

Abstract: A method and apparatus for compression molding closure liners wherein a set of tooling including a first assembly and second assembly which are movable toward and away from one another. The first assembly of tooling has a liner forming member and a closure engaging sleeve thereon and the second assembly has a closure supporting pad thereon. A cam is associated with the first assembly of tooling for moving the closure engaging sleeve into engagement with a closure and the liner forming member into position for compression molding a charge of plastic extrudate in the closure when it is supported on the closure supporting pad. A gas cylinder is associated with the closure supporting pad providing a predetermined controlled pressure that determines the compression molding force on the plastic. In a preferred mode, a plurality of sets of tooling are provided in circumferentially spaced relation to one another on a turret.

Abstract: A plastic beverage closure including a base wall, a peripheral skirt and a plurality of threads on the inner surface of the skirt for engagement with the threads of a container which may be made of glass or plastic. The plastic closure includes a compression molded seal extending about the periphery of the inner surface of the base wall and the juncture of the base wall to the peripheral skirt. The closure includes a central axially thickened portion; a channel surrounding the thickened portion and extending radially to an annular radially thickened portion on the skirt at the juncture with the base wall. A concave surface extends from the base of the channel and merges with the surface of the annular portion. A compression molded liner is provided on the thickened portion, channel and concave surface of the closure and defines a planar sealing surface of contact with the end surface of the finish of a container and an arcuate surface for engaging the arcuate surface of a container.

Abstract: A shaft seal includes a case defining an axial portion and a radial portion, and a resilient PTFE sealing member is secured to the case by an elastomeric material, such as rubber, in an injection molding process. The elastomeric material forms an outer ring encasing the case axial portion and the outer portion of the resilient sealing element. The resilient sealing element is initially in the form of a disc-like member having a central aperture, and the shaft seal is formed by clamping the disc-like member and the case together within a pair of mold sections defining mold cavities corresponding to the desired final shape of the elastomeric material. After the elastomeric material has hardened, the seal is placed against a base and a mandrel is used to deflect the inner portion of the resilient sealing member relative to the outer portion. The seal may further include an excluder lip seal formed of the elastomeric material integrally with the ring.

Abstract: A sealing device to be mounted between a member and a rotation shaft which can be rotated relatively to the member, includes an annular flanged portion formed of a resin and disposed to surround the rotation shaft, and extends in a radial direction of the rotation shaft. A resin seal lip extends from an inner end of the flanged portion in an axial direction of the rotation shaft toward fluid to be sealed in such a manner that the resin seal lip surrounds the rotation shaft. The resin seal lip has a first seal ring having a sealing surface which hermetically and slidably contacts the rotation shaft, a second seal ring having an elastic flanged portion formed of a rubber material and disposed to surround the rotation shaft and extending in a radial direction of the rotation shaft, and an elastic seal lip extending, over the resin seal lip, from an inner end of the elastic flanged portion in the axial direction of the rotation shaft toward the fluid to be sealed to surround the resin seal lip.

Abstract: A method and apparatus for compression molding plastic articles including closures which includes providing coacting sets of tools including a first set for moving a core and core sleeve into engagement with a cavity mold on a second set of tooling. An actuator is provided between the first set of tooling and a fixed upper cam. The second set of tooling includes an associated actuator supporting the cavity mold and associated with a lower fixed cam. A nitrogen cylinder in the second set of tooling provides for control of the compression molding force. In a preferred form, a plurality of sets of tooling are provided in circumferentially spaced relation on a rotating turret supported by a central column. A common manifold supplies the pressure at accurately controlled pressure to each of the nitrogen cylinders. A control system is provided for monitoring and changing the pressure.

Abstract: A method of forming a component having a metallic shell (12) and a plastics insert (34). The component is formed by placing the shell (12) inside the mould cavity of a mould assembly (10) which forms part of an injection moulding machine. Prior to injection of plastics material, part of the external surface of the shell (12) is spaced from the opposed surface of the mould cavity. The open end of the shell abuts the adjacent mould cavity and wall so as to form a seal. This end wall is frusto-conical in shape so that, during injection of plastics material, as the shell (12) is reformed by polymer pressure into complete engagement with the surface of the mould cavity, longitudinal contraction of the shell in response to this direct lateral strain is compensated for by the frusto-conical shape so that the seal is maintained.

Abstract: A method and apparatus for compression molding closure liners wherein a set of tooling including a first assembly and second assembly which are movable toward and away from one another. The first assembly of tooling has a liner forming member and a closure engaging sleeve thereon and the second assembly has a closure supporting pad thereon. A cam is associated with the first assembly of tooling for moving the closure engaging sleeve into engagement with a closure and the liner forming member into position for compression molding a charge of plastic extrudate in the closure when it is supported on the closure supporting pad. A gas cylinder is associated with the closure supporting pad providing a predetermined controlled pressure that determines the compression molding force on the plastic. In a preferred mode, a plurality of sets of tooling are provided in circumferentially spaced relation to one another on a turret.

Abstract: A mold core for use in a two-component injection molding method is presented, in particular for two-component injection molding of plastic closures for bottles and similar containers. The invention solves the problem that integral mold cores, due to the configuration of the first molding, are only difficultly or not at all displaceable by a predetermined amount from the first molding, to form an intermediate space or second cavity for the injection of a second molding. The invention accounts for this in that the mold core consists of first and second sub-cores or tool elements and that one sub-core or tool element, after injecting the first substance, is displaceable by a predetermined amount relative to the first molding. After the second substance has been injected into the created intermediate space to form the second molding, a central tool element of the mold core is used as an ejector to support the deforming of the closure from the mold core.

Abstract: A lid for sealing a container. The lid adheres to the container by a vacuum formed within the container. The lid is formed of a substantially circular panel having a flanged perimeter and a concave depression on an upper side of the circular panel. A pressure release hole extends through the concave depression of the circular panel and sanitary coating is disposed on a lower side of the circular panel. A first adhesive material is applied to the lower side of the lid by fusion to the sanitary coating to form a thin film over the release hole, and a second adhesive material is disposed in the concave depression on the upper side of the lid to form a removable seal. The second adhesive material has the same properties as the first adhesive material.

Abstract: A module, such as a terminal block (10), configured of a body (12) having an open end (20) and at least one window (24) spaced from the open end, is fixtured and sealed by way of a channel (28) comprised of a pair of parallel, spaced-apart, generally elastic walls (30,32) jointed by a bottom member (34). The walls (30,32) and the bottom member (34) run longitudinally a distance at least as long as the width of the terminal block (10) to allow the block to be received between, and to be held by, the walls. At least one protrusion extends out from a separate one of the walls (30,32) and the base member (34) for receipt in the window (24) in the terminal block to seal the same.

Abstract: A non-blocking hot melt adhesive mass is prepared by (a) lining a rigid mold with a plastic film, said film being meltable together with the adhesive composition and blendable into said molten adhesive composition, and said mold being a heat sink or being in contact with a heat sink; (b) pouring molten hot melt adhesive into the lined mold; and (c) allowing the molten hot melt adhesive to solidify.

Abstract: The subject brake block comprises a cup shaped metal component and an elastomeric component formed in a two part mold. The method involves using the metal component of each brake block as one of the parts used in molding the elastomeric component of the brake block. This decreases the accuracy required in making and aligning the mold parts. The metal component is shaped so that the elastomeric component is mechanically locked in place in it when the elastomeric component is formed.

Abstract: A method of manufacturing a gasket having an improved elastomeric sealing bead. The method includes the steps of providing an embossment in a gasket body and filling the cavity of the embossment with an elastomer. The gasket is then positioned in a press and the embossment is squeezed to displace the elastomer into a sealing bead which projects from the flattened recess and beyond the major surface of the gasket body. The gasket is then removed from the press prior to use and installation in its intended environment.

Abstract: An apparatus for forming liners of thermoplastic material within closure shells contains a movable die having an inner punch member and an annular outer mold member both of which are movable up and down in relatively slidable relation with each other and arranged so that the inner punch takes its lowermost position after the outer mold member has taken its lowermost position. In one embodiment of the present invention, the lower end surface of the outer mold member is beveled and defines a plurality of radial grooves. The lower end wall of the outer mold member is moved downwardly until it is opposite the horizontal wall of the closure shell. As the inner punch moves into its lowermost position, thermoplastic material is forced through the radial grooves so that a thick annular pad portion of the seal liner is formed beneath the lower end wall of the outer mold member.

Abstract: The present invention includes of a method for producing a cross sectionally tetragonal tube package for flowable substances, in particular milk and juices. A carrier material (12) coated with synthetic plastic is cut longitudinally and horizontally through to center (35) and then shaped to form two welds (13,14) which made up the relevant tube (1) of the package. The stepped edge (10) of each web (13,14) serves as the top-end edge (10,16) of the tube (1), the blank (I) of which is separated form the web (13,14) by (at 41) parting it in transverse relationship to their direction of movement (15), the blank being provided with a longitudinal sealing seam for formation of the tube. At the top end of the tube (1), there are formed extensions of oppositely disposed side walls (3,5) and projecting wall panels (8,9) which are folded over into the surface of the top (7), the top (7) being integrally moulded on the free edge (10) of the wall panel ( 8,9) and the adjacent stepped end edge (10).

Abstract: A a lid for sealing a container. The lid adheres to the container by no more than a vacuum formed within the container. The lid is formed of a substantially circular panel having a flanged perimeter and a concave depression on an upper side of the circular panel. A pressure release hole extends through the concave depression of the circular panel and sanitary varnish is disposed on a lower side of the circular panel. A first adhesive material is applied to the lower side of the lid by fusion to the sanitary varnish to form a thin film over the release hole, and a second adhesive material is disposed in the concave depression on the upper side of the lid to form a removable seal. The second adhesive material has the same properties as the first adhesive material.

Abstract: The dimensions of an injection molded hollow plastic product having laminated walls is controlled and the separative forces exerted against mold sections during molding of the products within a cavity of a mold having a core section and a cavity section defining the mold cavity therebetween, are reduced by methods including the steps of (a) injecting a first plastic material into the mold cavity; (b) cooling the injected first plastic material in the mold cavity; (c) injecting subsequent to injecting the first plastic material, a second plastic material into the mold cavity so that the cooled injected first plastic material is sufficiently solidified to stabilize the core section in relation to the cavity section by impeding movement of the core section in relation to the cavity section caused by injecting the second plastic material, whereby the injected second plastic material further fills the mold cavity; and (d) cooling the injected plastic material in the mold cavity to thereby solidify the molded produ

Abstract: An apparatus equipped with a molding means for molding an annular liner on the inside surface of top panel of a container closure shell. The molding means includes an anvil on which the container closure shell is placed in an inverted state, and a press tool assembly which is disposed above the anvil to ascend or descend relative to the anvil. The press tool assembly includes a punch member, an excess resin counter member arranged on the outside of the punch member, a bushing member arranged on the outside of the excess resin counter member, and a sleeve member arranged on the outside of the bushing member. The sleeve member has a passage notch and a non-passage notch. A feeder nozzle is disposed to feed a synthetic resin material into the press tool assembly, the nozzle having a discharge port positioned in the moving path of passage notch. The synthetic resin material discharged from the discharge port enters into the sleeve member through the non-passage notch and is cut away from the discharge port.

Abstract: A method of manufacturing a ring-shaped hydraulic seal (10) produces a cylindrical sealing surface (12) having portions (24) formed of a plastic material and portions (26) formed of an elastomeric material. The method includes the steps of forming a plastic ring (30) and molding an elastomeric material into a cavity (50) in the plastic ring (30). The cylindrical sealing surface (12) is formed by grinding away the material of the ring (30) to expose a surface (26) of the elastomeric material which is contained in the cavity (50) in the ring (30). The plastic portions (24) of the cylindrical sealing surface (12) are defined by the ground surface (82) of the plastic ring (30). The elastomeric portions (26) of the cylindrical sealing surface (12) are defined by the exposed surfaces (26) of the elastomeric material.

Abstract: A lid (1) is injection-molded of polyethylene, for a widemouthed barrel of a synthetic resin, and includes an outer rim (4) encompassing the barrel neck (3) and an inner rim (5) dipping into the barrel neck. The outer lid rim (4) and inner lid rim (5) form an annular space (7), an annular web (8) projecting axially from the base of this space. For producing the lid gasket (13), the annular space (7) is exposed to an open flame for activating the annular space surface. Subsequently the sealing material, preferably polyurethane, is injected from a foaming machine into the base of the annular space (7), and thereafter the lid (1) is vibrated in order to degasify the gasket (13). The sealing material, preferably consisting of foamed polyurethane, contains a parting compound having a long-term effect.

Abstract: A fabric reinforced molded conical diaphragm and method of making in which the parting line of the diaphragm mold is arranged such that the flashing and reinforcing fabric of the molded diaphragm are on the sidewall of the outer clamping bead at a location displaced from the juncture of the sidewall and the bottom surface thereof, so that upon inverting the diaphragm member, the fabric free bottom surface of the clamping bead is transposed to the sidewall of the diaphragm clamping bead, thereby providing a smooth, accurately sized outer periphery of the diaphragm to facilitate its assembly.

Abstract: An apparatus for forming an annular liner is equipped with a molding assembly which includes a press tool assembly and an anvil. The container closure shell is fed onto the anvil. The press tool assembly has a resin flow path and a means for forcibly flowing a synthetic resin material through the resin flow path. A notch is formed in the upstream portion of the resin flow path. When the molding assembly moves with respect to the feeding nozzle, the synthetic resin material discharged from the discharge port of a feeding nozzle enters into the upstream portion of the resin flow path via the notch, and is cut away from the feeding nozzle.

Abstract: This invention relates to an injection moulding process for the manufacture of multi-layered articles, especially articles having barrier properties. The process includes clamping a thermoplastic film over the cavity of a mould of an injection moulding process, the film being capable of being stretched. The film is then stretched within the mould by inserting the core of the mould, preferably using a core in which a central part enters the mould and partially stretches the film prior to the remainder of the core entering the mould. The mould is then closed, excess film is trimmed off and polymer is injected into the mould cavity. The resultant article is a multi-layered injection moulded article which, depending on the characteristics of the film and injected polymer, may have barrier properties to oxygen, liquids or the like that are superior to articles moulded from only the polymer. The process is particularly useful in the moulding of containers having a depth:width ratio of at least 0.5.

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: A sealing device dispossed between two members which are relatively rotatable, such as rotation shaft and housing of machinery, includes a first seal ring provided with a resin seal lip being disposed in an axial direction of one of the members to be sealed and having a sealing surface and a second seal ring provided with an elastic rubber seal lip disposed in an axial direction of one of the members to be sealed, the rubber seal lip being provided with a sealing surface closely contacting the sealing surface of the resin seal lip. The first and second seal rings are secured by a securing means. The securing device for securing the first and second seal rings is composed of an annular sealing recess formed on another surface of the resin seal lip opposed to the sealing surface thereof and a sealing projection formed on the sealing surface of the rubber seal lip of the second seal ring.

Abstract: The dimensions of an injected molded hollow plastic product are controlled and the separative force exerted against mold sections during molding of the product are reduced by injecting plastic material continuously from a gate into a mold cavity having flow channels extending through the cavity region until the mold cavity is filled with said injected plastic material, with said injection being under such conditions of injection pressure, injected plastic material temperature, mold cavity temperature, flow channel length, distance between flow channels, flow channel thickness and wall thickness in a thin-cavity region between flow channels that initially injected plastic material solidifies in the thin-cavity regions to thereby stabilize one mold section in relation to the other mold section prior to the mold cavity being filled with the injected plastic material, and to thereby reduce said separative force.

Abstract: The present invention provides a method of lining a plastic closure top with a thermoplastic, non-cross linked curable, vinyl chloride copolymer plastisol composition that is plasticized with an effective low temperature fusing amount of (A) an epoxydized natural oil, (B) an organic diglycidyl ether and (C) a curing agent for the diglycidyl ether, the plastisol being stable with a shelf life of at least about four months, the method including heating, without preheating, the lining and the closure top at a temperature not over about 300.degree. F. for about 90 to 120 seconds using convection heating without pressure and without conductive heating, to fuse the composition and thereafter solidifying the fused compositon and thereafter cure the composition to provide the lining with tensile and elongation measurements sufficient for a stable closure assembly.