Plasma (e.g., Corona, Glow Discharge, Etc.) Patents (Class 264/469)
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Patent number: 4432919Abstract: Disclosed is a taxidermy mannikin mold and molding method for making a mannikin which has eyes insert-molded therein in proper position and rotational orientation and which has proper eye-surrounding anatomical surface features. The mold cavity has therein eye socket recesses each of which is immediately surrounded by a correctly contoured surface having reference indicia marking.Type: GrantFiled: March 29, 1982Date of Patent: February 21, 1984Inventor: John R. Rinehart
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Patent number: 4415513Abstract: A capstan for use on a tape transport, including a hub, a tubular outer rim supported co-axially about the hub, and a body portion of foam plastic between the hub and rim.Type: GrantFiled: January 15, 1981Date of Patent: November 15, 1983Assignee: Telex Computer Products, Inc.Inventor: Ivo T. Plachy
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Patent number: 4412962Abstract: Improved mold structure and method of molding for mechanically frothed urethane foams is presented. The mold is filled from the bottom via an annular runner which communicates with the mold cavity. The connection between the annular runner and the mold cavity is restricted to create a back pressure in the circumferential runner.Type: GrantFiled: August 30, 1982Date of Patent: November 1, 1983Assignee: Rogers CorporationInventors: Michael D. Bessette, Robert B. Jerard
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Patent number: 4400336Abstract: A method by which a previously molded hollow plastic retainer having an open end portion necessitated by the need to withdraw a mold core therefrom may be embedded in a molded trim article with the open end beneath the surface and yet the molding material is prevented from flowing through the open end portion and filling the hollow of the retainer.Type: GrantFiled: October 23, 1981Date of Patent: August 23, 1983Assignee: General Motors CorporationInventor: Robert D. Thomas
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Patent number: 4390333Abstract: A hole, particularly an accidental perforation, is closed by manoeuvering a bladder (g) into the hole employing a hollow rod (f) on which the bladder is mounted at one end. An operator operating from the other end of the rod actuates a device such as a triggered valve to cause the components of a settable foamed plastics material to pass (via tubes b and rod f) from their sources (in a) to fill the bladder (g) so that it closes the hole. The settable foamed plastics material is preferably polyurethane foam. The bladder may be of natural or synthetic rubber and may be protected against tearing by a textile envelope. The sources of foamed plastics material may be either in a portable kit (a) or rupturable containers within the bladder (g) or rod (f).Type: GrantFiled: February 5, 1981Date of Patent: June 28, 1983Assignee: Esso Societe Anonyme FrancaiseInventor: Michel A. J. Dubois
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Patent number: 4386628Abstract: A sewer pipe, transport pipeline, or other circumferentially enclosed passageway is lined by inserting into and along it a flexible tubular material of given diameter, with its corresponding circumference being less than the inside perimeter of the passageway. The tubular material is a laminate having a dimensionally stable skin layer facing the interior of the passageway and a contiguous layer of a composition foamable to form an expanded cellular structure. After insertion of the tubular material the contiguous layer is foamed to expand cellularly so as to fill the space between the inner skin and the inside wall of the passageway and to solidify in place. The tubular material may have an expansible outer skin layer also.Type: GrantFiled: November 20, 1980Date of Patent: June 7, 1983Assignee: Pro-Tech Advisory Services LimitedInventor: Robert K. Stanley
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Patent number: 4384905Abstract: The thermally insulated conduit includes an internal pipe, an external pipe, and an insulating foam which fills the interspace formed between these pipes. An electric grid, consisting of a wire heater, extends through the tubular space and is attached to the outer periphery of the internal pipe. The insulating foam used is made from a base of epoxy resins which are polymerized and hardened by an exothermic chemical reaction. The electric grid is used to heat the fluid contained in the internal pipe when the conduit is operated.Type: GrantFiled: April 3, 1981Date of Patent: May 24, 1983Inventor: Rene Gros
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Patent number: 4381273Abstract: The sealing strip includes a channel-shaped attachment profile of rubber, in which a metallic reinforcing strip is embedded; this profile has an external coating layer of sponge rubber with an outer surface rendered velvety by abrasion.Type: GrantFiled: October 1, 1980Date of Patent: April 26, 1983Assignee: Saiag S.p.A. Industria Articoli GommaInventor: Roberto Azzola
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Patent number: 4379104Abstract: The invention relates to a method of moulding a tire for a wheel rim by means of a mould having mould parts, said mould parts being movable between a closed working position in which they enclose a mould cavity with the shape of the tire and an open position in which said mould parts are spaced apart, wherein in the open position of the mould parts a hollow tire core is positioned in the mould cavity while being receivable with respect to said parts, wherein the mould parts are moved into the working position, in which a residual cavity not occupied by the tire core is left free in the mould cavity, said residual cavity. Preferably the tire core is arranged on the wheel rim before being positioned with respect to the mould parts. The invention also provides a device for moulding a tire and a tire obtained with the aid of the method and device.Type: GrantFiled: March 16, 1981Date of Patent: April 5, 1983Inventor: Arie Koorevaar
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Patent number: 4374079Abstract: The specification discloses an apparatus and method for concurrently manufacturing at least two semiround tubing structures. An extruder including plasticizing means for a plurality of plastic resins extrudes semiround and linear strips of plastic material in generally two back to back D-shaped sleeves. Between the D-shaped sleeves, a strip of adhesively non-compatible material is extruded so that the D-shaped sleeves may be separated. The rounded portions of the D-shaped sleeves are molded in a continuous blow molding arrangement to form the top wall of the semiround tubing. The tubing is cooled, and the two semiround tubing lengths separated from the adhesively non-compatible strip inbetween. Optionally, the base of the semiround tubing may be perforated. The two lengths of semiround tubing are folded with the base inside the top wall and coiled into large reels.Type: GrantFiled: March 4, 1981Date of Patent: February 15, 1983Assignee: Hancor, Inc.Inventors: James L. Fouss, Larry A. Rosenbaum, James L. Child, Jr.
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Patent number: 4372028Abstract: A method of manufacturing a foam insulated water heater of the type having an inner tank, a layer of insulating foam material surrounding the inner tank and an outer protective shell includes, in one embodiment, the steps of (1) forming a flexible, expandable bag in a configuration which may be placed around the bottom edge of the inner tank, (2) attaching the flexible bag around the bottom edge of the tank, (3) filling the bag with a foam material which expands to form a collar, (4) positioning the outer shell about inner tank prior to expansion of the foam collar, and (5) subsequently filling the remainder of the space between the tank and the shell with an expandable foam material which is retained, at least in part, by the foam expanded, flexible bag.Type: GrantFiled: October 6, 1980Date of Patent: February 8, 1983Assignee: Rheem Manufacturing CompanyInventors: Keith R. Clark, Michael Focia, Jr.
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Patent number: 4367109Abstract: Inner tubes for pneumatic tires including a toric cushion made from an elastomer material having cells independent of each other.A process for manufacturing such inner tubes with a mold for preforming and vulcanizing semi-toric elements, the mold includes fingers for molding recessed cavities and an incorporated heating network, the preformed semi-toric elements having undergone a first vulcanization are then joined together and subjected to a second vulcanization in an appropriate apparatus.Type: GrantFiled: October 7, 1980Date of Patent: January 4, 1983Assignee: Hutchinson-MapaInventors: Robert Estrade, Jean Michaut
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Patent number: 4358417Abstract: Method of repairing a leaking bell and spigot joint employing a containment which is fit around the coupling to form a completely enclosed annular cavity. A premixed fluid composition comprising an acrylic, a resin, a filler, and a blowing agent is injected into the cavity. This hardens exothermically, providing heat to activate the blowing agent and expand the composition as it sets, forcing the composition into any irregularities to seal the leak and leave a pressurized acrylic sealing ring on the pipe.Type: GrantFiled: May 22, 1981Date of Patent: November 9, 1982Assignee: AMP IncorporatedInventor: Ernest L. Beinhauer
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Patent number: 4352647Abstract: A tire press bag well is insulated with at least one envelope. The envelope extends substantially around the bag well within the bag well housing and can be inflated. The envelope, in addition to its insulating properties, can have insulation thereon and the ends of the envelope can be fastened to itself. The configuration of the envelope, once installed, desirably conforms to the shape of the bag well housing. Since heat is applied to a tire press via the bag well, insulation thereof considerably reduces heat loss as well as reduces cure time.Type: GrantFiled: December 19, 1980Date of Patent: October 5, 1982Inventor: Harold S. Rocco
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Patent number: 4351786Abstract: Composite bowling pins and baseball bats are formed with foamed, cured-in place plastic bodies securely adhered to a central aluminum core by a somewhat thermoplastic adhesive coating. The exothermic reaction attendant to curing the plastic so softens the adhesive coating that it does not interfere with shrinkage of the plastic body relative to the core. This minimizes stress concentrations in the composite construction which otherwise tend to lead to cracking in use.Type: GrantFiled: August 25, 1980Date of Patent: September 28, 1982Assignee: Mueller-Perry Co., Inc.Inventor: Alvin W. Mueller
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Patent number: 4322260Abstract: The invention relates to a process for the continuous extrusion forming of a thermoplastic double-walled, foam-core conduit by the sequential steps of extrusion forming an inner plastic tube, evenly coating said inner tube with foam-core layer and extrusion forming and bonding an outer tube in contact with said foam-core layer, said outer tube being generally evenly spaced apart from said inner tube by said foam-core layer providing a plastic double-walled, foam-core conduit.Type: GrantFiled: April 4, 1979Date of Patent: March 30, 1982Assignee: Monsanto CompanyInventor: Lawrence E. Conlon
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Patent number: 4314954Abstract: The invention relates to a method of producing molded bodies of expanded plastic having a predetermined density, based on a starting material in granulate form to which a blowing agent and optionally a cross-linking agent have been added, said starting material being introduced into an injection molding machine/press in which it is heated and injected/pressed into a mold. In order to obtain an efficient production process without loss of raw material and a product whose density can be determined in advance, the material in the injection molding machine/press is heated to a temperature which is below the temperature required to initiate the reaction of the blowing agent/cross-linking agent, and the blank thus formed is subsequently transferred to an expansion mold having the shape of the desired final product, but larger, than the blank. The blank is caused to expand in the expansion mold and final expansion takes place outside the expansion mold.Type: GrantFiled: September 6, 1979Date of Patent: February 9, 1982Assignee: Bakelittfabrikken A/SInventor: Lars Ringdal
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Patent number: 4292263Abstract: For both orthopedic and sports uses, a foamed plastic pad is integrally molded to a fabric. More particularly, a knitted sleeve is constructed having a terry loop on the interior surface of a hydrophobic yarn (e.g. acrylic) and an exterior surface of a hydrophilic yarn (e.g. cotton), whereby moisture is wicked away from the surface in a hydrokinetic fashion. A soft, hydrophilic polyurethane foam pad, which acts as a sponge, absorbs the moisture, is molded integrally with the sleeve, leaving the terry loops free for skin contact. For sports uses, knitted or woven fabrics may be employed, and stiffer, polyurethane foams are preferred.Type: GrantFiled: August 27, 1979Date of Patent: September 29, 1981Assignee: Zimmer USA, Inc.Inventors: James R. Hanrahan, Richard G. Levine
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Patent number: 4289716Abstract: A blend of high and low density polyethylene and azodicarbonamid added as blowing agent is heated in an extruder to a temperature above the melting point of the high density component and fed to a shear head having a hollow rotating mandrel through which tubing is fed for depositing thereon a hose at the nozzle exit of the head. A peroxide is fed to the shear head for mixing with the polymer blend and immediately initiating crosslinking; blowing begins just prior to the depositing, the material being already crosslinked to a considerable extent.Type: GrantFiled: February 14, 1979Date of Patent: September 15, 1981Assignee: Kabel- und Metallwerke Gutehoffnungshutte A.G.Inventor: Hermann U. Voigt
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Patent number: 4285746Abstract: A tubular band of pre-decorated heat shrinkable material is positioned over the bulbous or central portion of a seasonal ornament and the ornament-band assembly is then subjected to a heat source and the band is permanently shrunk onto the outer surface of the ornament, thus providing a surface decoration therefore.Type: GrantFiled: August 29, 1975Date of Patent: August 25, 1981Assignee: Corning Glass WorksInventors: Ronald G. DePuy, George W. Stevens
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Patent number: 4276245Abstract: A first mold is made by mounting a plurality of semicircular ribs of a relatively large radius on a board in spaced relationship and centered along an arc on the board with the ribs extending generally radially of the arc and having diametral portions of their peripheries facing the board, foaming a foamable hardenable liquid resin in place between each pair of adjacent ribs, and applying hardenable liquid resin over the ribs and foam. A glass fiber reinforced outer jacket for insulation is formed on and removed from the first mold. A second mold is made similarly to the first but using semicircular ribs of a relatively small radius. The outer jacket is mounted on the second mold and the space therebetween has foamable hardenable liquid resin inserted therein to form a jacketed longitudinally curved semicircular section of foamed resin pipe insulation.Type: GrantFiled: August 22, 1979Date of Patent: June 30, 1981Assignee: Owens-Corning Fiberglas CorporationInventor: Russell L. Ault
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Patent number: 4274822Abstract: An apparatus for forming seal liners of thermoplastic material within closure cap shells comprisies: a plurality of movable dies each having an inner die and an annular outer die both of which are movable up and down in relatively slidable relation with each other and arranged so that the inner die takes its lowermost position after the outer die has taken its lowermost position; means for restricting downward movement of the outer die so as to provide a constant clearance between its lower end and an internal surface of a cap shell to be worked with, so that an annular foaming chamber of a constant capacity is formed beneath the lower end of the outer die; and a plurality of gas discharging grooves are provided so as to be communicated with the foaming chamber.Type: GrantFiled: August 28, 1979Date of Patent: June 23, 1981Assignee: Osaka Nagayanagi Cork Ind., Co., Ltd.Inventors: Shuichi Tamai, Norihide Matsuyama
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Patent number: 4268571Abstract: Ths invention relates to a method of making a foam-containing structure which includes placing and suitably retaining a respective shaped sheet in each of first and second complementary parts of an open mould. Each sheet includes at least one layer of fibrous material and on that face thereof remote from the respective mould part at least one filter layer. When the two mould parts are closed together a foamable material is introduced into a cavity formed between the sheets and is then caused to expand. Some of the expanding material passes through the filter layers into the fibrous material, the characteristics of those layers being so chosen as to produce a desired extent of penetration of the expanding material into the fibrous material.Type: GrantFiled: August 30, 1979Date of Patent: May 19, 1981Assignee: Dowty Rotol LimitedInventor: Roy F. J. McCarthy
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Patent number: 4258089Abstract: Surfaces of thermally conductive substrates are covered with thermoplastic polymers, particularly certain fluorocarbon polymers by bonding said polymeric materials directly to surfaces of said substrates. Adhesives, etchants, or the like are not used as bonding elements. The process involves treating the surfaces to make them wettable by water and then cleaning the surfaces, if necessary, followed by heating the substrate to a temperature at which the polymer melts, gels or softens (herein called the softening point), then placing the polymeric material into contact with the prepared surfaces and applying pressure on the polymeric material to force it into fusing and bonding contact with the heated surface and then cooling the substrate to a temperature below the softening point of the polymer. The products produced are preferably rolls. In their covered form as produced by this invention they are useful as processing rolls in office copier's fusing systems, rolls used in food cooking processes, and the like.Type: GrantFiled: February 7, 1979Date of Patent: March 24, 1981Inventors: Edward P. Anderson, Donald G. Curran
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Patent number: 4251476Abstract: Manufacture of ornamental vehicle wheels wherein a mold surface of desired decorative contour is sprayed with one or more layers of a polyurethane reaction mixture and partially cured in situ. A steel wheel is then placed over the mold surface and a polyurethane reaction mixture which includes a foaming agent is poured into the mold cavity formed therebetween. The poured mixture is then cured and the layers are finish-cured in situ to form an integral ornamental elastomeric structure adhered to the wheel.Type: GrantFiled: March 16, 1979Date of Patent: February 17, 1981Assignee: Motor Wheel CorporationInventor: Richard W. Smith
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Patent number: 4249517Abstract: A composite glass and molded frame member. In a specific embodiment, one or more glass panels may be utilized in association with a generally U-shaped elastomeric packing and mold-piece seal strip with thin leg portions engaging the glass. The strip has a collapse or compression zone formed outboard and adjacent the edge portion of the glass to accommodate, inter alia, differing thermal expansions and contractions of the glass and the frame. The glass edge and strip are unitary with a perimeter frame of urethane plastic material which is molded over the glass edge and seal. The mold pieces of the molding apparatus have continuous raised or ridge portions adapted to engage the leg portions of the elastomeric strip on either side of the glass panel to prevent flow of plastic material over the glass surface area encircled by the ridge portions of the mold pieces.Type: GrantFiled: February 13, 1978Date of Patent: February 10, 1981Inventors: Lawrence E. Schroeder, Carlton M. Burgess
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Patent number: 4249872Abstract: A process for producing cork lines which comprises holding a leader or leaders with a pair of metal molds having at the junctional surfaces thereof one or more cavities for forming a float or floats and one or more furrows formed so as to pass through said cavity or cavities for holding said leader or leaders, injecting a molten synthetic resin mixed with a foaming agent into said cavity or cavities to effect molding and foaming of said resin, cooling said metal molds and taking out a float or floats integrally fixed to said leader or leaders from said metal molds.Type: GrantFiled: January 12, 1979Date of Patent: February 10, 1981Assignee: Ashimori Kogyo Kabushiki KaishaInventors: Seishiro Akaura, Yasushi Nagamune, Takeshi Nakamura
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Patent number: 4248811Abstract: Equipment and formulations for the filling of ordinary pneumatic tires with a polyurethane foam, whereby all types, sizes and pressure ratings may be accurately filled, matching the ride and handling characteristics and load-bearing properties of air-filled tires and providing longer wear for the tires while at the same time providing puncture and blow-out proof tires.Type: GrantFiled: December 5, 1977Date of Patent: February 3, 1981Inventors: Earl N. Doyle, Rene Trevino, Richard S. Hicks
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Patent number: 4245970Abstract: A method for connecting a lateral sewer line to a main sewer line which is relined with a plastic pipe liner, comprises plugging a lateral sewer line upstream of the main sewer line to seal off the lateral sewer line, spraying a grout material downstream of the location of the plug until the space between the main sewer line and the plastic pipe liner is filled, allowing the group material to set, removing the plug from the lateral sewer line and providing an opening through the grout material and the plastic pipe liner so that the lateral sewer line is connected to and in communication with the plastic pipe liner. An apparatus which is used to plug the lateral sewer line and dispense the grout material comprises a spray gun positioned within a tubular inflatable bladder where the nozzle for the spray gun is in front of the bladder. The apparatus also includes means for conveying compressed air to and for conveying compressed air from the inflatable bladder.Type: GrantFiled: October 4, 1978Date of Patent: January 20, 1981Inventor: Henri S. St. Onge
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Patent number: 4230346Abstract: A roof drain, for receiving rain water from a roof and conducting it to a drain pipe, includes a drain body made from polyurethane foam and having a flange integral with and adjacent to the inlet end of such drain body. A collar which makes sealing connection with the roof covering is attached to the drain body flange by molding the drain body in contact with a preformed collar of vinyl acetate ethylene material.Type: GrantFiled: September 6, 1977Date of Patent: October 28, 1980Inventor: Klaus Gobel
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Manufacture of foam coated rod-like elements particularly for supporting pot-grown plants in general
Patent number: 4218415Abstract: Method of manufacture of foam coated rod-like elements particularly for supporting pot-grown plants in general comprising the step of arranging a plurality of elongated tubular members of plastic material in spaced parallel relationship to each other into a tank and casting synthetic foam forming chemicals into the tank. The foam forming chemicals are caused to expand within the tank up to a level higher than the uppermost tubular member. The tubular members are thereby embedded into the foam. After hardening of the foam from the formed foam block foam coated rod-like elements are cut out each containing embedded therein one tubular member.Type: GrantFiled: January 10, 1978Date of Patent: August 19, 1980Assignee: Botanik S.r.l.Inventor: Elia Biscaro -
Patent number: 4209862Abstract: A method and apparatus for manufacturing reinforced composite marble-like sinks and bathtubs. A sandwiched article is provided and wherein a polyurethane foam filler is interposed between a solid marble mix layer and a reinforcing layer of fiberglass reinforced resin embedded in the marble mix layer. The foam layer reduces the overall weight of such lavatory structures.Type: GrantFiled: March 22, 1979Date of Patent: July 1, 1980Inventor: Rodrigo Cortes-Garza
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Patent number: 4206164Abstract: A pipe insulation is made between an inner and outer mold core from a liquid which foams and then forms a solid. The foaming action may cause movement in the inner mold which is detected and then adjusted accordingly to maintain concentricity between the inner and the outer wall of the pipe insulation. The insulation may be used alternatively as pipe.Type: GrantFiled: October 25, 1978Date of Patent: June 3, 1980Assignee: Owens-Corning Fiberglas CorporationInventor: Sheldon A. Canfield
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Patent number: 4186162Abstract: A method of making a business machine platen core wherein a cylindrical body including a hollow tube extending co-axially thereof is encapsulated with an insulative foam with a pair of opposed plugs inserted in each end thereof.Type: GrantFiled: April 14, 1978Date of Patent: January 29, 1980Inventor: Thomas G. Daley
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Patent number: 4154786Abstract: A foam-producing mixture is poured directly into a mold, whose base is constituted by an inner movable wall and outer stationary wall which is provided with supports passing through holes in the inner wall in order to retain mattress springs by the frustums of cones. The springs also bear against an upper wall of the mold and are held solely by the forces of cohesion of the solidified foam.Type: GrantFiled: January 21, 1976Date of Patent: May 15, 1979Inventor: Robert Plasse
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Patent number: 4153657Abstract: Polyurethane foam is used in a three-piece vehicle wheel as a load bearing and load transmitting structural element. The rim of the wheel, an inner wheel disc, and an outer decorative wheel disc are bonded together by the polyurethane foam. The rim includes an interlock lip to interlock the rim with the inner disc and an interlock lip that interlocks the rim with the outer decorative disc. The wheel can be manufactured by placing the rim, inner disc, and outer disc in a die and injecting the polyurethane foam composition into the interconnected volume enclosed and defined by those wheel components. The foam curing process then occurs in situ. Alternatively, the rim, inner disc, and outer disc can be adhesively bonded to a preformed polyurethane foam member. The resultant vehicle wheel, manufactured by either process, is characterized by high strength, light weight, and a decorative appearance.Type: GrantFiled: October 31, 1977Date of Patent: May 8, 1979Inventor: Raymond J. Wilcox
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Patent number: 4152798Abstract: A process for producing cork lines which comprises holding a leader or lers with a pair of metal molds having at the junctional surfaces thereof one or more cavities for forming a float or floats and one or more furrows formed so as to pass through said cavity or cavities for holding said leader or leaders, injecting a molten synthetic resin mixed witha foaming agent into said cavity or cavities to effect molding and foaming of said resin, cooling said metal molds and taking out a flat or floats integrally fixed to said leader or leaders from said metal molds.Type: GrantFiled: April 27, 1977Date of Patent: May 8, 1979Assignee: (Ashimoro Industry, Co., Ltd.) Ashimori Kogyo Kabushiki KaishaInventors: Seshiro Akaura, Yasushi Nagamune, Takeshi Nakamura
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Patent number: 4134782Abstract: This invention involves the method and apparatus for simultaneously placing a coating of a selected material on the outer surface of an extended cylindrical object such as a pipe or conduit, and holding the coating in position by wrapping the coating with a strip of thin film formed to a cylindrical contour and sealed with a longitudinal seam. This is accomplished in one mode by inserting the pipe through a tubular concentric mandrel, wrapping and sealing the plastic film against the mandrel and injecting the coating material through the annular space between the pipe and the mandrel and thus into the space between the pipe and the sealed plastic film. Using heat shrinkable plastic the film forms a tightly fitting cover for the pipe coating material.Type: GrantFiled: October 20, 1975Date of Patent: January 16, 1979Assignee: C F S CorporationInventor: Clemens F. Straughan
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Patent number: 4124670Abstract: A novel structural member, such as a tennis racket frame, having an unusually high strength to weight ratio is provided comprising an expanded foamed plastic core integrally bonded to a shell comprising at least one layer of resin-coated unidirectionally oriented graphite fibers, the shell completely encasing the core at any transverse cross section of the structural member, said core comprising from about 25 to about 75 volume percent of a low density cellular filler material, such as chopped cork, and from zero to about 60 weight percent of a high density weight control material, such as barium sulfate.Type: GrantFiled: July 7, 1976Date of Patent: November 7, 1978Assignee: Fansteel Inc.Inventors: Andrew M. Cecka, Paul G. Pawling
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Patent number: 4094715Abstract: A method of applying foamed insulation to pipe is contemplated by the present invention. The pipe is moved longitudinally while being rotated about its longitudinal axis. A sprayable, foamable liquid is directed onto the surface of the pipe from a stationary location and is allowed to partially rise before a protective outer jacket is wrapped around the rising foam. The wrapping step includes application of sufficient pressure to the foam to increase the final density thereof, at the outer surface, by from 10% to 25% above the density if the foam was allowed to rise uninhibited.Type: GrantFiled: August 27, 1976Date of Patent: June 13, 1978Assignee: Henderwood Industries, Ltd.Inventors: Stewart Henderson, Ralph Hielema
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Patent number: 4087501Abstract: A method for the continuous production of completely or partly foamed thermosetting polymerizable plastic articles, such as pipe insulation shells or sleeves. One or more sets of justaposed mold-carrying endless conveyors are employed wherein one conveyor of each set supports a series of longitudinally contiguous mold halves complementary with a series of longitudinally contiguous mold halves supported by the other conveyor of the set. The conveyors are advanced simultaneously, and during the juxtaposed portion of travel define a laterally closed, longitudinally extended mold cavity which moves or advances. The cavity thus defined comprises a plurality of zones corresponding to tube segments extending longitudinally in side-by-side, substantially planar disposition, with thin hinge-forming channels interconnecting adjacent segment zones. A thermosetable foam-forming resin mix is distributed on to one of the complementary mold halves prior to closing of the mold cavity.Type: GrantFiled: January 19, 1976Date of Patent: May 2, 1978Assignee: The Upjohn CompanyInventor: Kurt Moser
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Patent number: 4075264Abstract: Vessel insulation is displaced from the adjacent surface of the vessel by fluid pressure and additional insulating material interposed between the insulation and the vessel.Type: GrantFiled: April 2, 1976Date of Patent: February 21, 1978Assignee: The Dow Chemical CompanyInventor: Robert A. Hay, II
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Patent number: 4073841Abstract: Cavities are filled with a foam insulating material by introducing the reaction mixture through the outlet nozzle of a mixing head which is drawn lengthwise through the cavity at a rate adapted to the rate of foaming, wherein the reactivity of the reaction mixture is accelerated during the filling procedure so that the reaction mixture is foaming up simultaneously over the length of the cavity.Type: GrantFiled: October 2, 1975Date of Patent: February 14, 1978Assignee: Bayer AktiengesellschaftInventors: Gerd Dultgen, Wolfgang Schmidt
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Patent number: 4073048Abstract: An improved seal for closing the space between a pipe and the wall of an opening through which it passes, using a linear extrusion of elastomeric material, of predetermined length to form a gasket. The extrusion has a hollow, pear-shaped head formed integrally with a T-shaped anchoring flange. It is curled into the form of a right cylinder, and its mating ends are vulcanized together. The pear-shaped portion is deflected radially inwardly and the T-shaped anchoring flange outwardly, the latter being then embedded in concrete used to wall the opening for the pipe. The pear-shaped portion is free in space and provides a pneumatic cushion for the pipe.Type: GrantFiled: July 30, 1976Date of Patent: February 14, 1978Assignee: A-Lok CorporationInventor: John Ditcher
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Patent number: 4063429Abstract: A pipeline retard, support and protection method wherein a fast-setting expandable foam is placed in a trench at spaced locations below and around a pipeline to create spaced retards and support pads in situ. Each retard and/or support pad is created in the absence of forms or other foam molding means for the expanding foam. The retards may be keyed to the trench walls and base for securement. The system is also adaptable to encapsulating a portion of the pipeline which transverses a roadbed.Type: GrantFiled: July 14, 1975Date of Patent: December 20, 1977Inventor: Ernest I. Wilson
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Patent number: 4060578Abstract: A method of making a foam-filled tire wherein a resilient elastomeric foam is formed and cured within a tire carcass while the carcass interior is at super-atmospheric pressure. Such superatmospheric pressure is believed to support the cell walls against internally generated gas (blowing) pressures, thereby stabilizing the cells at higher than usual internal cell pressure. The foaming operation is carried out so that the foam only partially fills the carcass interior. After the elastomeric foam has been cured the tire carcass interior is depressurized down to the pressure to be used in service. During the depressurization process the internal cell pressures cause the cells to expand and further fill the tire interior space. The depressurization processis carried out after the elastomeric foam has been cured, i.e. when the cell walls have attained their full potential strength.Type: GrantFiled: October 30, 1973Date of Patent: November 29, 1977Inventor: Frederick N. Kisbany
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Patent number: 4050978Abstract: A contruction member, usable in exterior or interior walls, ceilings or floors, including: a stiff, planar, can-supporting panel or board; cylindrical or otherwise non-rectangular, parallel-axes cans having end covers fixed to the panel or board, these cans being preferably of metal but optionally of dense, strong plastic or glass, of the new or used type, having lengths that are less than twelve times their diameters; optional insulation inside the cans; large-mesh metal or plastic fencing, fixed to can ends; and porous, insulating, strength-providing adhesive material around portions of the can sidewalls, bonding and bracing the cans together into a bar, panel or block, part of this material being in layers within recesses of the can-end covers that are spaced from the panel or board.Type: GrantFiled: April 21, 1974Date of Patent: September 27, 1977Inventor: Alvin Edward Moore
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Patent number: 4049480Abstract: Disclosed is a method and apparatus for forming a joint in a confined space between two abutting ends of conduit liners. In the method, an excavation is formed to provide access to a buried conduit. Thereafter, the conduit is opened and cleaned of debris and elongated sections of conduit liner are inserted through the opening into the conduit in opposite directions from the opening. Once insertion is completed, a sleeve is positioned concentrically around one of the conduit section ends. The ends of the sections are positioned in an abutting coaxial relationship and are aligned and attached together by tape. The sleeve is then moved to a position overlapping the intersection of the two sections and the annular space between the sleeve and the exterior of the conduit sections is closed by sealing with foam rubber stripping constrained by tape. A polyurethane material is injected through a port in the sleeve to fill the annular space. Thereafter, the polyurethane material is allowed to set.Type: GrantFiled: October 10, 1975Date of Patent: September 20, 1977Assignee: Nipak, Inc.Inventor: C. T. Kutschke
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Patent number: 4046942Abstract: Method of producing an entrainer for squeezing or dyeing textile fabric webs with the aid of a foulard which includes inserting a spread-out endless textile web into an annular mold both the web and the annular mold having a periphery and a width corresponding to the periphery and width of the entrainer to be formed and thereafter filling the annular mold with a material that hardens to form a sponge; and endless entrainer produced by the foregoing method.Type: GrantFiled: November 29, 1974Date of Patent: September 6, 1977Assignee: A. MonfortsInventor: Kurt VAN Wersch
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Patent number: 4042663Abstract: A metal seat pan is placed inside a rotational casting mold to define part of a rotational casting cavity into which is introduced rotationally castable material for forming a flexible plastic seat cover. A rotational casting operation produces a closed, hollow seat cushion shell defined by the seat pan and the flexible plastic cover. Foaming ingredients are introduced into the hollow shell to form a resilient foamed plastic interior. The resulting seat cushion is monolithic, without seams or joints and has no removable parts or mechanically joined components which will come apart from each other.Type: GrantFiled: December 16, 1974Date of Patent: August 16, 1977Assignee: Coach and Car Equipment CorporationInventor: Arthur J. Harder, Jr.