Cap Or Cup-like Preform (e.g., Container Closure, Etc.) Patents (Class 264/268)
  • Patent number: 4093097
    Abstract: A plastisol composition containing as the resin component a copolymer of a normal .alpha.-olefin and maleic anhydride (1:1 mole ratio) having the structure ##STR1## WHEREIN B is a member of the group consisting of ##STR2## and the hydrolysis product thereof, ##STR3## R is H or C.sub.x H.sub.2x+1, x is 1 to 16 and n is 2-300, and a plasticizer for said resin component. The plastisol when fluxed can be used as a closure gasket for containers.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: June 6, 1978
    Assignee: W. R. Grace & Co.
    Inventor: Walter Robert Wszolek
  • Patent number: 4092201
    Abstract: A process for lining an air-permeable container, such as a paper cup, with a thermoplastic foil by directing a warm pressurized stream of gas to press the foil into place and varying either the flow rate or temperature of the gas stream or both to guarantee the foil shape within the container while it is thus controllably cooled and solidified. The apparatus includes a controllable discharge valve, such as a relief valve formed at the edge of a spring loaded cover through which gas is supplied, for allowing a faster gas flow for cooling than used for deep drawing the foil. Either one or two gas supplies may be used. In the case of two, the gas supply for cooling is at a higher pressure than that used for deep drawing and is preferably at a lower temperature.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: May 30, 1978
    Assignee: Maschinenfabrik Rissen GmbH
    Inventor: Fritz Wommelsdorf
  • Patent number: 4088730
    Abstract: A plunger for forming thermoplastic material disposed in a closure shell into a closure insert with a cushion pad or bead by sealing the material between the crown and working surface of the plunger and flexing a portion of the working surface to form the material into the desired shape. The plunger includes a punch, elastomeric material and a sealing means. In one embodiment, the plunger comprises a reciprocal punch having a lower end surrounded by cylindrically-shaped elastomeric material, and sealing means that is disposed about the outer wall of the elastomeric material and has a lower ledge contacting the bottom surface of the elastomeric material. A spring means maintains the elastomeric material in sealing engagement with the punch and sealing means, and maintains the punch, elastomeric material, and sealing means in mechanical engagement.
    Type: Grant
    Filed: April 21, 1976
    Date of Patent: May 9, 1978
    Assignee: H-C Industries Inc.
    Inventor: Sheldon L. Wilde
  • Patent number: 4085186
    Abstract: A hot melt composition for forming flowed-in closure liners or gaskets having a viscosity and resulting flow properties suitable for use in high speed, liner forming operations. The composition comprises between 20 and 55 percent of a thermoplastic elastomer chosen from the group consisting of block copolymers of the type having the general formula A-B-A or of the type having a plurality of chains of the general formula B-A radiating from a central hub. A is a thermoplastic segment, preferably polystyrene, and B is an elastomeric segment, preferably polybutadiene, polyisoprene, or polyethylene-butylene. The other ingredients in the composition may be extenders, antioxidants, fillers, pigments, lubricants, etc. as desired.An in-situ molded crown liner, ring-seal bottle cap gasket, roll-on closure liner, CT (screw) cap gasket, lug cap gasket, and snap-on cap gasket, made from the composition and containing no PVC, are disclosed.
    Type: Grant
    Filed: December 5, 1975
    Date of Patent: April 18, 1978
    Assignee: CPL Corporation
    Inventor: William C. Rainer
  • Patent number: 4081503
    Abstract: Container closures are given the customary sealing gasket of plastics material by a two stage deformation of a pellet of the plastics material. In a first stage the material is partly deformed and is heated by direct conduction from a heated deforming member, and in the second stage a relatively cool final moulding die effects further deformation to impart the desired finished configuration to the gasket. The pressure member, and possibly also a workpiece support on which the upturned closure rests, is heated by means of a radiant heat source directing radiant heat onto a blackened roughened surface of the pressure member, and the workpiece support where applicable. The pressure member has a low-adhesion surface of polytetrafluoroethylene.
    Type: Grant
    Filed: July 25, 1974
    Date of Patent: March 28, 1978
    Assignee: W. R. Grace & Co.
    Inventor: Keith Shotbolt
  • Patent number: 4076790
    Abstract: A method of incorporating a pre-cut foil sheet in a container moulded from a thermoplastic material by injection moulding techniques during the process of moulding the container. The foil sheets are fed singly from a store to a position of registry with the free end of the plunger forming part of the mould of the injection moulding apparatus, whereafter the mould is closed, the foil sheet being wrapped around the plunger upon entry thereof into the die. A moulding compound is then injected into the mould. The stream of moulding compound entering the mould is guided so that the foil sheet is either located on the inner surface of the moulded object or on the outer surface thereof.
    Type: Grant
    Filed: August 29, 1975
    Date of Patent: February 28, 1978
    Inventor: Evald Torbjorn Gustav Lind
  • Patent number: 4068776
    Abstract: A plastisol composition containing as the resin component a copolymer of a normal .alpha.-olefin and maleic ahydride (1:1 mole ratio) having the structure ##STR1## WHEREIN B is a member of the group consisting of ##STR2## and the hydrolysis product thereof, ##STR3## R is H or C.sub.x H.sub.2x+1, x is 1 to 16 and n is 2-300, and a plasticizer for said resin component. The plastisol when fluxed can be used as a closure gasket for containers.
    Type: Grant
    Filed: January 3, 1977
    Date of Patent: January 17, 1978
    Assignee: W. R. Grace & Co.
    Inventor: Walter R. Wszolek
  • Patent number: 4058584
    Abstract: A method for manufacturing luminous hollow bodies to be used in signs or the like. The luminous hollow bodies are molded in such a way that first an endless side wall thereof is molded and then an end wall is molded at one end of the space confined by the endless side wall. The endless side wall is made up of a plurality of layers which give the final hollow body desired properties of light-transmission, strength, and the like. These layers while still in a soft moldable condition are placed around an inner mold member and are surrounded by an outer mold member made up of a plurality of sections which can be brought together to define with the inner mold member an endless space having the thickness and configuration of the desired side wall of the final hollow body.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: November 15, 1977
    Inventors: Enrique Ubach Aloy, Pedro Ubach Aloy, Jose Maria Genovart Aguilo
  • Patent number: 4054636
    Abstract: Round, pillar or block type candles are fabricated by extending a wick centrally through a candle mold, initially forming a wax shell on the surface of the mold having one open end, filling the wax shell with powdered wax, and sealing the open end of the wax shell to contain the powdered wax therein. A candle is thus formed which may have a colored or scented exterior shell with a powdered wax interior and which will burn in a manner which facilitates the formation of "flowering sides" or "angel wings.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: October 18, 1977
    Inventor: John B. Menig
  • Patent number: 4038359
    Abstract: A shaft seal of the type including a metal case and a polytetrafluoroethylene sealing element, is provided with an auxiliary sealing lip by providing a radial flange of the metal case with a plurality of circumferentially spaced-apart apertures therethrough and molding an annular filler ring of synthetic rubber in the space between the sealing element and the metal case such that the rubber also flows through the apertures to the other side of the radial flange of the metal case and forms an auxiliary lip there. The filler ring chemically bonds to the metal case and mechanically bonds to the sealing element to lock the sealing element in place while also forming an auxiliary lip.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: July 26, 1977
    Assignee: Garlock Inc.
    Inventor: Darrell D. Pendleton
  • Patent number: 4035212
    Abstract: Process of and composition for forming a hard, rubber-like covering on the ends of metal rolls utilized in the textile, paper or other industry including the following. A semi-liquid, elastomeric, polymeric, coating composition is provided having a viscosity sufficient to prevent sagging from the ends of the metal roll when applied thereto while being sufficiently liquid to dispense easily in a continuous stream and being cross-linkable to form a hard, rubber-like material. Cement is applied onto the ends of the metal roll and the semi-liquid coating composition is applied onto the cemented ends. The coating composition is cross-linked by heating to cure and solidify the semi-liquid composition to form a hard rubber-like coating on the ends of the metal roll.
    Type: Grant
    Filed: July 25, 1975
    Date of Patent: July 12, 1977
    Assignee: Carolina Rubber Hose Company
    Inventor: David G. McRitchie
  • Patent number: 4020966
    Abstract: A plastisol composition containing as the resin component a copolymer of a normal .alpha.-olefin and maleic anhydride (1:1 mole ratio) having the structure ##STR1## WHEREIN B is a member of the group consisting of ##STR2## and the hydrolysis product thereof, ##STR3## R is H or C.sub.x H.sub.2x.sub.+1, x is 1 to 16 and n is 2-300, and a plasticizer for said resin component. The plastisol when fluxed can be used as a closure gasket for containers.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: May 3, 1977
    Assignee: W. R. Grace & Co.
    Inventor: Walter R. Wszolek
  • Patent number: 3997965
    Abstract: Apparatus is provided for shaping a generally elongate strip of lubricant wicking material and placing it into a component for a dynamoelectric machine. In this apparatus, means is provided for receiving the strip when it is introduced thereinto, and means associated with the receiving means is operable generally for moving the strip therefrom and converting the shape of the strip into a predetermined configuration. Means is provided for predeterminately locating the dynamoelectric machine component on the apparatus with respect to the moving and converting means, and means is operable for displacing the strip generally in its predetermined configuration from the moving and converting means into place within the dynamoelectric machine component.
    Type: Grant
    Filed: July 8, 1975
    Date of Patent: December 21, 1976
    Assignee: General Electric Company
    Inventors: Paul R. Smoltich, James W. Wilson
  • Patent number: 3998922
    Abstract: A method for making a candle is disclosed. The candle is made by filling an open-topped jar with a solidifiable fuel, suspending in the fuel a rod having a sheet metal plate connected to its lower end concentrically with the jar, allowing the fuel to solidify around the rod, removing the rod, inserting a wick into the hole left by the rod and into said plate and completely filling the jar.The wax is dispensed into the jar by an improved circuit which includes a tank containing the heated wax and a pump which recirculates liquid wax through a pressure regulating valve. The wax is dispensed to the jars by timing valves.
    Type: Grant
    Filed: January 28, 1976
    Date of Patent: December 21, 1976
    Inventor: Theodore H. Weiss
  • Patent number: 3983206
    Abstract: The disclosed heterogeneous hot-melt sealant system is particularly well suited to sealing the typical tongue-and-groove joint between the base and cover of a burial vault. The hot-melt system comprises a plurality of layers, each layer being a distinct phase which resists chemical or morphological penetration (e.g. paraffin oil migration) from the adjacent layer. The layers are typically applied to the groove in the cover for the vault by individual casting or pouring of each of a plurality of hot-melt compositions in the molten state. Each hot-melt composition comprises an essentially amorphous polypropylene, a hydrocarbon resin (e.g. synthetic terpene resin), and a hydrocarbon (e.g. paraffin) oil. The first (bottom) poured hot-melt contains more polypropylene and less oil and terpene resin than the second (upper) pour.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: September 28, 1976
    Assignee: H. B. Fuller Company
    Inventors: Bernard T. Juba, James A. Collins
  • Patent number: 3978188
    Abstract: In the attachment of a tension rod to an open end of a cable, one end of a tension rod is axially inserted into the core of the cable and the combination vertically positioned with the other end of the tension rod extending downward. A heat shrinkable plastic cap including a casting resin is moved up from below the tension rod until the inside bottom surface of the plastic cap comes proximate to the bottom of the tension rod, and the upper open portion of the plastic cap encompasses a section of the cable jacket. Heat is then applied to the upper portion of the plastic cap so as to shrink the upper portion to form a hermetic seal with the cable jacket, and then to the lower portion of the plastic cap so as to shrink that portion of the plastic cap toward the portion of the tension rod extending from the open end of the cable, so as to form a closed volume within the cap that decreases upon shrinkage to uniformly press the casting resin contained therein into the cable core.
    Type: Grant
    Filed: August 22, 1975
    Date of Patent: August 31, 1976
    Assignee: Kabel-und Metallwerke Gutehoffnungshutte Aktiengesellschaft
    Inventor: Karl-Heinz Schoenebeck
  • Patent number: 3971785
    Abstract: Process of lining aerosol can valve mounting cups with a gasketing composition comprising a carbon dioxide blocked polyamine dispersed in a liquid polyurethane prepolymer consisting of a free isocyanate group-containing reaction product of a polyisocyanate compound with a polyhydroxy material. The lined cups are heated for a few minutes to gel the gasket and full cure subsequently takes place without further intervention by means of ambient atmospheric moisture. The process is rapid, economical in equipment and produces gaskets which permit a significant extension of swaging specifications.
    Type: Grant
    Filed: February 13, 1975
    Date of Patent: July 27, 1976
    Assignee: W. R. Grace & Co.
    Inventors: Thomas A. Messina, Patrick J. Droney