Cap Or Cup-like Preform (e.g., Container Closure, Etc.) Patents (Class 264/268)
  • Patent number: 5123824
    Abstract: Device for retaining crown caps, which can be particularly applied in machines for forming the sealing gaskets inside caps of the type having carousels which have disks which rotate about vertical axes and which further have in the peripheral region thereof semicircular and angularly equidistant seats for the support and transfer of the caps, has a rocker-like lever mounted on the disks, at each semicircular seat, which oscillates within a radial median plane of the seat. The lever has one arm controlled by an actuation cam and can, with the beak-shaped end of the other arm, internally engage the dentellated edge of the cap, so as to retain it in its seat during a preset angle of rotation of the disks.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: June 23, 1992
    Assignee: SACMI Cooperativa Meccanici Imola S.c.r.l.
    Inventor: Rodiero Alieri
  • Patent number: 5112554
    Abstract: A top element in the nature of a dripless pour spout is secured to the neck of a liquid container by means of hot melt material to provide a liquid seal therebetween. The hot melt material is applied to the container neck in the form of globs at a plurality of circumferentially spaced locations. Upon application of the top element by rotation thereof, the globs of hot melt material are spread over the container neck to provide a uniform seal thereat.
    Type: Grant
    Filed: October 18, 1990
    Date of Patent: May 12, 1992
    Assignee: J. L. Prescott Company
    Inventors: Ricardo R. Perez, George S. Ulatowski
  • Patent number: 5106565
    Abstract: A hermetically sealing apparatus comprises: a first seal ring made of a rubber-like resilient material and adapted to seal two members which rotate relative to each other; a second seal ring made of a resin and disposed adjacent to the first seal ring on the atmosphere side; and a backup ring secured to the first seal ring. The backup ring has a flange for clamping both the first and second seal rings. The flange is provided with a plurality of holes in such a manner that a portion of the second seal ring contacting the flange bites into the plurality of holes owing to a molding pressure of the first seal ring.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: April 21, 1992
    Assignee: NOK Corporation
    Inventor: Takayuki Saitoh
  • Patent number: 5104603
    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.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: April 14, 1992
    Assignee: NOK Corporation
    Inventor: Takayuki Saitoh
  • Patent number: 5091129
    Abstract: A method for manufacturing a filter cartridge by polymerization of a polyethylene hydrocarbon with granular elements are set forth. The method involves the preparation of a mixture comprising the hydrocarbon and the granular elements, then introduction of the mixture into a mold which is formed by a first porous wall and a second porous wall, these walls being connected to a jacket, the introduction of the mold in an oven so as to raise the temperature of the mixture and by a thermal polymerization reaction to transform the hydrocarbon into a material binding the granular elements of the mixture, the assembly of the material and granular elements then forming a cartridge, and injection of a chemically inert gaseous composition into the mold through one of the walls to impart fluid permeability to the cartridge.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: February 25, 1992
    Assignee: Institut Francais du Petrole
    Inventor: Claude Gadelle
  • Patent number: 5082612
    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).
    Type: Grant
    Filed: January 7, 1991
    Date of Patent: January 21, 1992
    Assignee: Federal-Mogul Corporation
    Inventors: John D. Butler, Jon A. Chandler
  • Patent number: 5037595
    Abstract: A method of making lids involves providing multiple mold parts which are movable between open and partially telescoped closed conditions, provision of a barrier strip or laminate which includes foamed plastic material, closing the mold parts to define a lid-shaped cavity with one of its inner and outer surfaces defined by a registered portion of the strip and spraying preheated plastic which adheres to the strip to fill the cavity and form the lid. The registered portion may be cut out during closing of the mold parts.
    Type: Grant
    Filed: January 29, 1990
    Date of Patent: August 6, 1991
    Assignee: Kornelis' Kunsthars Producten Industrie B.V.
    Inventor: Wiebren D. H. Kornelis
  • Patent number: 5023037
    Abstract: Blocks with a casing composed of upper and lower parts are produced by inserting the upper and lower parts in an inserting device above and below pushing elements between upper and lower pressing dies of a press, displacing by the pushing elements the lower part in a chamber of a mold towards the lower pressing die and the upper part towards the upper pressing die with self-releasable holding on the latter, withdrawing the inserting device from a pressing region between the upper and lower pressing dies, and cyclically repeating these steps in synchronism with a working stroke of the press.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: June 11, 1991
    Assignee: Bucher-Guyer AG Maschinenfabrik
    Inventor: Heinz Zullig
  • Patent number: 4994132
    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.
    Type: Grant
    Filed: February 13, 1990
    Date of Patent: February 19, 1991
    Assignee: Essef Corporation
    Inventors: Michel Liekens, Edward T. LeBreton, Arthur M. Kepler
  • Patent number: 4994224
    Abstract: An injection molding device and a method for manufacturing a foil decorated molding use a first half of a mold and a second half of a mold with a transfer foil having a transfer layer on a substrate film transported into a space between the first half of the mold and the second half of the mold. A heating and removing device has a heating device and a molding removal device moved into the space to hold, with the removal device, a molding attached temporarily to the first half of the mold, and to heat the foil at the side of the second half of the mold with the heating device. When the first and second halves of the mold are closed, the heating and removing device is moved outside the space to remove the molding from the removal device.
    Type: Grant
    Filed: March 16, 1989
    Date of Patent: February 19, 1991
    Assignee: Nissha Printing Co., Ltd.
    Inventors: Hisayuki Itoh, Yuzou Nakamura, Noriaki Higuchi, Seiichi Yamasaki
  • Patent number: 4988467
    Abstract: A hot melt gasket of two superimposed layers. The first layer contains a large amount of tackifier resin to ensure good adhesion to the closure surface. The second layer contains little or no tackifier resin to ensure a good seal between the closure and container. The hot melt gasket is particularly well suited for use on plastic closures, especially polyolefin closures and more especially polypropylene closures.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: January 29, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Robert S. Holdsworth, Shawn E. Brown, Joel A. Gribens
  • Patent number: 4981627
    Abstract: A method and appaatus for curing a gasket material on a cap, the apparatus having a microwave transmitter, associated wavegide and a device for moving multiple caps through the waveguide. A plastic material is applied to the cap so as to form a gasket. The cap is then moved through the waveguide where microwave energy is absorbed by plastic material. The plastic material then heats from room temperature to a predetermined curing temperature in the waveguide. The cap is then removed and allowed to cool back to room temperature so that the gasket material will harden.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: January 1, 1991
    Assignee: Raytheon Company
    Inventor: E. Eugene Eves, II
  • Patent number: 4971745
    Abstract: A method for applying a uniform sealant coating over the portion of a fastener exposed above a panel includes applying a sealant retaining shell over the exposed portion of the fastener to define a closed volume between the shell, fastener and panel. The shell has an aperture, removed from the mouth of the shell, for receiving sealant therethrough. An injection nozzle receiving structure for receiving a sealant injector nozzle therein is provided adjacent and substantially aligned with the aperture. Sealant is injected into the shell through the injection nozzle receiving structure and through the aperture therein to fill the area between the fastener and the shell. A pressure is selected for injecting the sealant such that injection is stopped when the shell is filled. The sealant is allowed to cure and the retaining shell is removed.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: November 20, 1990
    Assignee: LTV Aerospace & Defense Company
    Inventors: Robert R. Ferenc, Jay B. Mize
  • Patent number: 4968469
    Abstract: Molded articles such as gaskets for container caps are made from a thermoplastic composition at high speed, for instance above 100 per minute, by continuously cutting a continuous supply of molten thermoplastic composition into molten pieces and transferring the molten pieces to a molding position at which they are molded into the gaskets or other desired articles, and the composition includes a melt-release material that continuously replenishes a melt-release layer on the surfaces by which the molten composition is cut and transferred to the molding position.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: November 6, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Steven A. C. White
  • Patent number: 4965035
    Abstract: A method of preforming a cover for a can. The cover is formed from a planar base having a metallic barrier layer and resin layers on either side thereof. The base is first premolded to have a flat bottom recess, a cylindrical sidewall, and preferably an upper flap portion. In the premolding the base is stretched no more than by a factor of 1.8. Then a resin is injection molded over the premolded base to form either a uniform bottom cover or a top cover with a tab.
    Type: Grant
    Filed: October 6, 1989
    Date of Patent: October 23, 1990
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Kiyokazu Ishiwatari, Yoshitsugu Hamada, Osamu Yamada
  • Patent number: 4931006
    Abstract: In an installation for producing packaging containers such as tubes, from prefabricated tube bodies and end portions of thermoplastic material, which are connected to the tube bodies, a plurality of moulds which are moved on a circulatory path each include an upwardly directed female mould portion and a mandrel which is pivotable about a horizontal axis between a downwardly directed working position and a loading position. A tube body loading station, a material feed station having a nozzle, and a container unloading station are arranged at spacings from each other along the circulatory path, while the female mould portion and the mandrel of each mould are displaced relative to each other on a common working axis. In a plurality of working units including support frames which are moved on the circulatory path, each support frame supports at least the female mould portion and the mandrel of a mould and the actuating mechanism thereof.
    Type: Grant
    Filed: May 11, 1988
    Date of Patent: June 5, 1990
    Assignee: KMK Karl Maegerle Lizenz AG
    Inventors: Bernhard Schwyn, Heinrich Ueberegger
  • Patent number: 4912826
    Abstract: A method and apparatus for the attachment of plastic outer body panels to automotive vehicle subframes including positioning a cup within apertures in the subframe, applying a thixotropic heat curable plastic/adhesive to the cup, heat curing the plastic/adhesive in situ while forming a blind aperture in the plastic/adhesive, and securing the body panel to the subframe through threaded insertion of a fastener into the blind aperture.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: April 3, 1990
    Assignee: Ford Motor Company
    Inventors: James R. Dixon, Derek F. Gentle, Adam M. Janotik, Lawrence P. Kazyak, Tahir M. Mansour, Emmanuel P. Papadakis, Gordon G. Strosberg
  • Patent number: 4904435
    Abstract: A method of making a tamper-evident closure cap including the steps of forming a one piece closure cap from a plastic material having a top, a skirt depending from the top and a tamper-evident band depending from the skirt. The band has a radially inward directed rib and an annular portion between the skirt and the tamper-evident band. The annular portion is engaged with a cutting blade which has a cutting edge and series of spaced notches. The blade and the cap are rotated to form a plurality of circumferentially spaced bridges with a series of angularly inwardly disposed tabs.
    Type: Grant
    Filed: December 29, 1987
    Date of Patent: February 27, 1990
    Assignee: The West Company
    Inventors: David E. Babcock, Daniel Luch
  • Patent number: 4868968
    Abstract: A method and apparatus for the attachment of plastic outer body panels to automotive vehicle subframes including positioning a cup within apertures in the subframe, applying a thixotropic heat curable plastic/adhesive to the cup, heat curing the plastic/adhesive in situ while forming a blind aperture in the plastic/adhesive, and securing the body panel to the subframe through threaded insertion of a fastener into the blind aperture.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: September 26, 1989
    Assignee: Ford Motor Company
    Inventors: James R. Dixon, Derek F. Gentle, Adam M. Janotik, Lawrence P. Kazyak, Tahir M. Mansour, Emmanuel P. Papadakis, Gordon G. Strosberg
  • Patent number: 4867926
    Abstract: A lip-type oil seal for use with a rotary shaft is manufactured by a method wherein different elastomeric materials for forming respectively the sealed liquid side and the atmospheric side of a tip portion of a sealing lip of the oil seal have different moduli of elasticity or hardnesses and are placed in a superposed condition within a mold prepared for vulcanization molding the oil seal. The mold is then clamped and the materials are heated and compressed so that an elastomeric material is fluidized and is vulcanization molded together with the other material to form an integral structure while a surplus portion is allowed to remain on the atmospheric side, thereby forming a sealed liquid side surface of the sealing lip. After the fluidized material has been hardened, the mold is opened and the surplus portion is then cut off, thereby forming an atmospheric side surface of the sealing lip.
    Type: Grant
    Filed: June 15, 1987
    Date of Patent: September 19, 1989
    Assignee: NOK Corporation
    Inventor: Noboru Matsushima
  • Patent number: 4851176
    Abstract: A method for making fluid seals with a mold which 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 out side 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 gasket-forming part of the cavity. The heel-forming cavity part lies between the lower part of the insides surface of the mold and the outer surface of the casing minor diameter.
    Type: Grant
    Filed: February 3, 1988
    Date of Patent: July 25, 1989
    Assignee: Chicago Rawhide Mfg. Co.
    Inventors: Keith W. Christiansen, James L. Kellner
  • Patent number: 4846646
    Abstract: An apparatus for connecting a tear-off section of a sealing cap with a pulling member including positioning means for orienting the sealing cap relative to the mould parts with the attachment part enclosed within the mould cavity and a chamber to receive a quantity of plastic material and communicating with the mould cavity via passages so that when the mould parts close the plastic will flow from the chamber into the mould cavity and envelop the attachment part.
    Type: Grant
    Filed: September 29, 1987
    Date of Patent: July 11, 1989
    Assignee: Wicanders Kapsyl AB
    Inventor: Swen-Ake Magnusson
  • Patent number: 4846362
    Abstract: A polyethylene compression-molded closure with an elastomer liner that is removable, the elastomer being a blend of polypropylene and a rubbery copolymer.
    Type: Grant
    Filed: March 4, 1988
    Date of Patent: July 11, 1989
    Assignee: Owens-Illinois Closure Inc.
    Inventor: Francis M. Schloss
  • Patent number: 4826380
    Abstract: A pre-cast dome-like shell is loaded with a predetermined amount of curable sealant. The sealant and dome are similar in composition. The dome is pressed over the exposed end of a fastener. An elastic portion of the shell can expand, thereby increasing the internal volume of the shell to accommodate small variations in sealant amount. A close fit between the shell and fastener, combined with an adequate shell wall, insure proper shell orientation and barrier thickness.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: May 2, 1989
    Assignee: LTV Aerospace & Defense Company
    Inventor: Winston L. Henry
  • Patent number: 4807772
    Abstract: A polypropylene compression molded closure with an elastomer liner that is removable, the elastomer being a blend of polyethylene and a rubbery copolymer, containing oil.
    Type: Grant
    Filed: March 4, 1988
    Date of Patent: February 28, 1989
    Assignee: Owens-Illinois Closure Inc.
    Inventor: Francis M. Schloss
  • Patent number: 4801418
    Abstract: A PVC-free sealing compound, particularly a sealing compound for use on containers, comprising a mixture of low density polyethylene or linear low density polyethylene; a styrene-isoprene-styrene block copolymer or a thermoplastic elastomeric blend of an ethylene-propylene copolymer such as EPM or EPDM, EVA and process oil, one or more fillers such as talc, and optionally cork powder.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: January 31, 1989
    Assignee: W. R. Grace & Co.
    Inventor: Bruno Bersano
  • Patent number: 4798122
    Abstract: Process for the manufacture of a wind instrument which, for varying the pitch, is provided with keys (6), which in turn are provided with compliant seal inlays (7), and wind instrument constructed in this manner, e.g., transverse flute, saxophone, clarinet, oboe, bassoon, piccolo. The seal inlays of the keys of the wind instrument, which are applied against the rim (5) of the holes (3) determining the pitch, are fitted to the rim of the holes to be closed by means of a nonrigid elastic plastic which is solidified in situ. During the molding, the keys are braced in the position corresponding to their closed position in the finished instrument by a brace which is removed after the molding or by a flexible covering which remains after the molding on the nonrigid elastic solidified plastic.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: January 17, 1989
    Assignee: Walter Wretschitsch
    Inventors: Barbara Gisler, Werner Tomasi
  • Patent number: 4756857
    Abstract: This relates to the forming of a seal between a container and a top element, such as a fitment, wherein the seal is subjected to a high top loading of a nature wherein conventional gasket materials, such as plastisols, will unduly flow and result in leakage. In lieu of the conventional gasket material, a hot melt material is utilized with the hot melt material being in a flowable state when the fitment is applied to the container and held in place by a mechanical interlock between the fitment and the container so as to cause an extrusion and flowing of certain of the hot melt material wherein the hot melt material functions both as a gasket and as a support to eliminate or restrain movement between the fitment and the container due to top loading. A special dispensing head is also provided for applying a controlled volume of hot melt material to each fitment in a preselected pattern.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: July 12, 1988
    Assignee: Continental Plastic Containers, Inc.
    Inventors: John Dezio, Leonard A. Blomquist, Michael J. Racanelli, John M. Ross
  • Patent number: 4755245
    Abstract: An open-topped casting mold and a matching mold are hingedly connected and are electrostatically coated with a powder screen; casting material is then poured into the molds without disturbing the powder by holding the powder in position with static electricity. The molds are pivoted together to provide a composite body of the hardened casting material formed by the bonding of the material from the two molds.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: July 5, 1988
    Assignee: Societe Nouvelle Raffinerie Meridionale de Ceresines
    Inventor: Gerard H. Viel
  • Patent number: 4751031
    Abstract: A method and an apparatus for waterproofing and gastightening a cable or tube passage (9) in a wall (11) or the like, using a foamable synthetic resin (8). A box-shaped or cover-shaped element, e.g. a cap (1, 2) is attached to one side of the wall, after which through an opening in cap (1, 2) the foamable resin (8) is supplied therein and the opening is stopped. The cap (1, 2) may consist of two parts (1, 2) and the two parts may be provided with rupturable closures or closable openings.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: June 14, 1988
    Assignee: Chemische Industrie Filoform B.V.
    Inventor: Jan Baars
  • Patent number: 4748796
    Abstract: An open-topped casting mold and a mating cover are electrostatically coated with a powder screen and casting material is poured into the mold without disturbing the powder by holding the powder in position with static electricity. The casting material is permitted to harden and a screen of powdery or fatty material placed on the upper surface of the hardened material and protective film applied over the screen.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: June 7, 1988
    Assignee: Societe Nouvelle Raffinerie Meridionale de Ceresines - Belix
    Inventor: Gerard H. Viel
  • Patent number: 4740345
    Abstract: In production of a composite type iron golf club head having a FRP (fiber reinforced plastic) backing in a rear recess, a peripheral flange to be caught by the main body is formed on the FRP backing by providing a bottom peripheral groove in the rear recess for fortified bonding of the FRP backing to the main body.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: April 26, 1988
    Assignee: Nippon Gakki Seizo Kabushiki Kaisha
    Inventors: Yoichi Nagasaki, Toyohiko Tadokoro, Tatsuo Nakanishi, Masaki Fujimura
  • Patent number: 4701229
    Abstract: A high frequency welding method comprises providing two plastic workpieces to be welded together with respective ribs which face each other, extend to the same height and have their surfaces opposite their facing surfaces inclined such that their thicknesses decrease toward their tops, and applying high frequency vibration to the ribs by positioning a high frequency welder horn such that the bottom of an annular groove of the horn having an arcuate sectional profile is pressed against the tops of the ribs.
    Type: Grant
    Filed: February 19, 1986
    Date of Patent: October 20, 1987
    Assignee: Nifco Inc.
    Inventors: Masaru Arakawa, Masanori Numata
  • Patent number: 4686076
    Abstract: A method, machine and mold are provided for fabricating, by injection of synthetic material, containers having a film forming an external coating. The machine includes a mold, an injection nozzle, a film feed device, and means for holding the film against the male element of the mold; and wherein the injection nozzle is carried by the male element of the mold and said holding means comprise a slider in the cavity of the female element movable, under the action of the male element, against a return force.
    Type: Grant
    Filed: June 24, 1986
    Date of Patent: August 11, 1987
    Inventors: Pierre Dromigny, Theodore Schottli
  • Patent number: 4683097
    Abstract: The present invention provides a dunnage rack including a molded pallet having a plurality of legs with caster supports integrally secured thereto, and to a method of forming such a dunnage rack. The dunnage rack is formed by first providing a mold for the pallet. A lower end of each leg portion of the mold is then blanked off with a caster support. The caster supports include a base plate arranged to support a caster and a plurality of flanges which extend upwardly from the edge, of the base plate into the mold. The flanges have an irregular surface. In a preferred embodiment, the irregular surface is formed by a plurality of openings or apertures. A molding material introduced into the mold engages the flange irregular surface to secure the caster support to the pallet legs.
    Type: Grant
    Filed: September 18, 1985
    Date of Patent: July 28, 1987
    Assignee: Interplastic Corporation
    Inventors: George E. Hand, Roman A. Kramer
  • Patent number: 4675139
    Abstract: Gaskets are formed in container closures fabricated from polyolefin resins exhibiting substantially no response to heat activation by radio frequency electrical energy by introducing a vinyl chloride plastisol containing a vinyl chloride polymer resin and a plasticizer having a loss factor in the range of 0.1-12 into the closure. The closure is preheated to to C. by conventional means and then the plastisol is fused in the closure by exposure to a field of radio frequency electrical energy.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: June 23, 1987
    Assignee: Continental Can Company, Inc.
    Inventors: Alfred W. Kehe, Thomas T. Fetters
  • Patent number: 4657719
    Abstract: A method of forming a cover sheet over an opening of a rotary electric device such as a trimmer capacitor or a variable resistor. The rotary device includes a rotor located in a housing or case which is accessible through the opening and adjustable by a screwdriver or similar tool. To form the cover sheet, pliable resin is extended while in an unhardened state to form a film. The case is pressed against the film to introduce a part of the film into the opening. Then the resin material forming the film is allowed to partially harden before the case is separated from the film. As a result, part of the film remains in the opening of the case to form the cover sheet. As the film is completely hardened a functional cover sheet over the opening is produced.
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: April 14, 1987
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Yukihiro Azuchi
  • Patent number: 4654963
    Abstract: An electrochemical cell having a conductive casing and an electrode plate assembly received therein, the plate assembly having exposable edge portions adjacent an interior surface of the casing, and insulation means comprising a nonconductive insulating casting self-adhered to the interior surface of the cell casing and disposed intermediate the interior surface and the exposable portions of the electrode plate assembly. The insulating casting is formed from a flowable material which is dispensed into the casing while flowable and which quickly hardens in place to become bonded to the casing.
    Type: Grant
    Filed: April 22, 1980
    Date of Patent: April 7, 1987
    Assignee: General Electric Company
    Inventor: Raymond K. Sugalski
  • Patent number: 4643041
    Abstract: A ball nut and screw assembly preadjusted and preloaded by injecting a liquefied pressurized thermoset resin through a mold and into the area between adjacent ball nuts and allowing the thermoset resin to cure and harden while pressurized. After hardening, the mold is removed and the external preload supplied to the resin is maintained by a hardened preload ring formed by the epoxy ring.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: February 17, 1987
    Assignee: General Motors Corporation
    Inventor: Robert L. Benton
  • Patent number: 4601476
    Abstract: A heat cured exhaust seal, adapted to be interposed between a pair of confronting pipes in sealing relationship therewith, is formed of wire mesh having openings between the wires thereof and a mixture of metallic fibers, non-metallic filler, a thermally stable lubricant and resin binder, which mixture surrounds the wires and substantially fills the openings in the mesh and forms the seal. The method of forming the seal includes placing a preform of wire mesh into a die cavity, forming a powder mixture of metallic fibers, non-metallic filler, a thermally stable lubricant and a resin binder, placing the powder mixture into the die cavity, pressing the wire mesh and powder mixture to the final size and shape of the seal and curing the seal at an elevated temperature.
    Type: Grant
    Filed: November 28, 1984
    Date of Patent: July 22, 1986
    Assignee: Metex Corporation
    Inventors: Peter P. Usher, Eugene J. Gavaletz
  • Patent number: 4588465
    Abstract: The barrier in a closure liner can be formed with a distinctive design or logo when the closure liner is inserted in the cap by placing a male embossing die against the sealing layer of the closure liner with sufficient force to emboss an image in the foil layer. The embossing of indicia into the liner at the time the cap is to be placed on the container provides the manufacturer with his own distinctive logo which cannot be readily duplicated thus making the container closure tamper-resistant.
    Type: Grant
    Filed: February 4, 1983
    Date of Patent: May 13, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Walter J. Paciorek
  • Patent number: 4584156
    Abstract: In order to facilitate the release of polyurethane from a steel or aluminium mould, the metal surface is provided with a mono-layer of an alkylmercaptan. A silver layer may be provided between the mould metal and the alkylmercaptan monolayer.The invention can be advantageously used for manufacturing a luminaire for a tubular discharge lamp.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: April 22, 1986
    Assignee: U.S. Philips Corporation
    Inventor: Johannes J. Ponjee
  • Patent number: 4555376
    Abstract: Method and apparatus for molding an elastomeric component of a shaft seal while bonding it to a fluorocarbon seal lip member. The lip member is initially shaped as a flat washer, and a radially outer portion is flexed during molding to a frustoconical shape. Positive retention of the fluorocarbon washer during molding is assured. Radially inner portion of the fluorocarbon washer rests on a planar annular mold ledge, its radially outer portion overhanging a frustoconical mold surface. A ring of uncured elastomer is located above that radially outer portion and radially inwardly from the outer periphery of the ledge. The radially inner portion has a horizontal toothed mold portion with a series of concentric sharp tooth edges. This directly engages the upper surface of the washer and clamps it firmly and immovably against the ledge. When the mold is closed, the elastomer flows and forces the outer portion of the washer down on frustoconical mold surface while bonding elastomer to washer.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: November 26, 1985
    Assignee: Federal-Mogul Corporation
    Inventor: John D. Butler
  • Patent number: 4554125
    Abstract: A molding process for manufacturing laminated stoppers having an elastomer core and thin thermoplastic liner where a sheet of thermoplastic liner material having an elongation of at least 450% and the vulcanizable elastomer core material are placed in a mold and molded at a temperature above the vulcanization temperature of the elastomer core but below the crystalline molding point of the thermoplastic liner.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: November 19, 1985
    Assignee: Schering Corporation
    Inventor: Julius Z. Knapp
  • Patent number: 4549337
    Abstract: A composite dual wall cast urethane elastomer to metal thread protector that will be practical under normal as well as frigid temperature conditions of usage is formed by deep drawing a seamless metal shell wall, using a threaded die to define a mold cavity with the metal shell wall, forming and setting a synthetic elastomeric shell wall within the mold cavity in an adhering assembled relation with and along the metal shell wall with threading that is complementary with threading of the die, removing the assembly by unscrewing it with respect to the threaded die, and subjecting the assembly to heat treatment to cure the elastomeric shell wall and provide a composite protector having a cast urethane elastomer wall in a secure adhering encapsulating relation on the metal shell wall.
    Type: Grant
    Filed: July 1, 1983
    Date of Patent: October 29, 1985
    Assignee: Alco Industries, Inc.
    Inventors: S. David Newell, William F. Matko, James L. Onoratti, Lawrence H. Parrott
  • Patent number: 4518554
    Abstract: A tubular container is molded with a cap by defining; at least one portion of a cavity for molding a neck portion between a female die for receiving a cap having a screw on the inside thereof and a male die having a fixed guide rod for insertion into the cap centrally thereof. A top end portion of a preformed container body is partly inserted into the cavity. A synthetic resin, which possesses compatibility with the container body and is not fused together with the cap, is injected into the cavity to form the neck portion integrally with the container body.
    Type: Grant
    Filed: September 6, 1983
    Date of Patent: May 21, 1985
    Assignee: Yoshida Industry Co., Ltd.
    Inventors: Yoshiharu Hatakeyama, Tatsuo Ishikawa, Kenzo Teshima
  • Patent number: 4517247
    Abstract: A shaped article having a synthetic resinous body and a thin fluoropolymer weld layer on its surface is formed by a process which comprises heating a heat conductive metallic core member, forming a thin fluoropolymer weld layer on the surface of the core member, treating the exposed surface of the fluoropolymer layer, forming a synthetic resinous body on the outer, treated surface of the fluoropolymer layer and removing the core member, such as by dissolving. In the shaped article thus produced, a thin fluoropolymer weld layer is formed on the surface of the synthetic resinous body, and the thickness of the fluoropolymer coating can be reduced. This permits the production of shaped articles at low cost and having high mechanical strength, even for complicated shapes. According to the invention, it is possible to produce articles having complex shapes such as corrosion resistant vessels, molds having good release characteristics, and so forth, at a comparatively low cost.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: May 14, 1985
    Assignee: Junkosha Co., Ltd.
    Inventors: Hirosuke Suzuki, Yoshiaki Sato
  • Patent number: 4497765
    Abstract: A novel closure-making process and apparatus are disclosed for formation of plastic closures. The closures include a plastic closure cap which is compression molded to provide a closure having the requisite strength. The process includes steps for formation of a sealing liner within the closure cap if desired, with formation of a novel liner-retaining arrangement provided for secure retention of the liner within the cap. The process also includes steps for formation of a tamper-indicating pilfer band integrally with the plastic cap of the closure for formation of closures requiring a suitable tamper-indicating device.
    Type: Grant
    Filed: June 22, 1982
    Date of Patent: February 5, 1985
    Assignee: H-C Industries, Inc.
    Inventors: Sheldon L. Wilde, Thomas J. McCandless, Robert M. Saunders
  • Patent number: 4492548
    Abstract: A headpiece for a collapsible tube is a unitary member made up of two different plastics, each plastic providing a different property for the headpiece. The headpiece is formed by extruding on top of one another a first torus like annulus of a first plastic and a second torus like annulus of a second plastic. The two plastic annuli are simultaneously molded to form the headpiece. One plastic forms, primarily, the outer portion of the headpiece and the other plastic forms, primarily, the inner portion of the headpiece.The machine for molding the plastic head includes a work table rotatably indexed from station to station at which various operations are performed. The mandrel which holds the cylindrical body, to which the head is molded, is movable from an inboard position to an outboard position so that operations can be performed relative to it. The molding operation is performed at the inboard position. The loading, extruding, capping and ejection operations are performed at the outboard position.
    Type: Grant
    Filed: December 1, 1981
    Date of Patent: January 8, 1985
    Assignee: RJR Archer, Inc.
    Inventor: Warren N. Hubert
  • Patent number: RE33192
    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.
    Type: Grant
    Filed: October 6, 1983
    Date of Patent: April 3, 1990
    Assignee: Garlock, Inc.
    Inventors: Dean R. Bainard, Dennis N. Denton