Of Organic Material Patents (Class 264/126)
  • Patent number: 4655877
    Abstract: An absorbent web structure composed of a mixture of 5 to 50% by weight of short fibers of a thermoplastic resin rendered hydrophilic with a surface-active agent and 95 to 50% by weight of cellulosic fibers, said thermoplastic short fibers being melt-bonded to impart self-supporting property to the web structure; characterized in that(i) said thermoplastic short fibers are rendered hydrophilic by forming an aqueous slurry of the fibers containing a nonionic surface-active agent and then dehydrating the slurry, and(ii) said nonionic surface-active agent has (a) an HLB value of from 2 to 20 and (b) a melting point equal to, or higher than, the temperature of the slurry at the time of the dehydrating treatment described in (i) above.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: April 7, 1987
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Koji Horimoto, Yoshinori Morita
  • Patent number: 4654178
    Abstract: A method for producing polyurethane or polyester containing therein the diacetylene group having high rigidity and useful in manufacturing precision mechanical parts, which comprises molding a polymer material containing therein the diacetylene group having a unit structure to be represented by the following general formula and a molecular weight in a range from 5.times.10.sup.2 to 1.times.10.sup.5 under a high pressure and at a temperature below the melting point of the polymer: ##STR1## wherein R is a divalent organic group; and x is an integer of 0 or 1.
    Type: Grant
    Filed: January 14, 1986
    Date of Patent: March 31, 1987
    Assignee: Agency of Industrial Science and Technology
    Inventors: Mitsutoshi Aritomi, Eisuke Fujiwara
  • Patent number: 4649014
    Abstract: Electrically conductive molded articles obtained by heating and compressing a nonwoven fabric comprising at least one kind of synthetic fiber and an electrically conductive material blended therewith, and a process for producing an electrically conductive molded article of a desired shape by heating said nonwoven fabric at the melting or softening temperature of the synthetic fiber and then cooling it while compressing.
    Type: Grant
    Filed: June 3, 1985
    Date of Patent: March 10, 1987
    Assignee: Midori C.M.B. Co., Ltd.
    Inventor: Kiyoshi Tochikawa
  • Patent number: 4649077
    Abstract: This invention relates to a heat activatable adhesive formed from at least two components each in the form of discrete, flowable particles which are capable of adhering in abutment of one particle with another to provide an open structured, porous matrix. The adhesive may be in the form of a sheet formed by blending the particles of each component, applying the mechanical mixture to a supporting sheet, heating the mixture and supporting sheet to the temperature at which the material with the lowest tackifying temperature becomes tacky, applying pressure sufficient to partially flatten the largest particles to a degree such that their minimum dimension is substantially equivalent to the thickness of the layer formed on said support sheet and during or after said pressure application.
    Type: Grant
    Filed: May 20, 1985
    Date of Patent: March 10, 1987
    Assignee: Adnovum AG
    Inventor: Alfred E. Lauchenauer
  • Patent number: 4649006
    Abstract: The compression molding of sections (15), bars, molded articles, or similar, consisting of vegetable particles mixed with binding media was uneconomical, because the relatively short molding time was overlapped by the disproportionate curing time. In order to considerably improve upon this deficiency, the inventor proposes to feed the molded section (15), or similar, along its longitudinal axis into a curing unit, while the sections (15) between the molding jaws (3 through 6) should remain in clamped position. The molding jaws (3 through 6), together with the cured section (15), are then returned through the press and the section is ejected after the unlocking of the molding jaws (3 through 6). Within the framework of the cyclic work, the individual operating processes can be adjusted to one another.
    Type: Grant
    Filed: November 1, 1984
    Date of Patent: March 10, 1987
    Inventor: Anton Heggenstaller
  • Patent number: 4645631
    Abstract: Extrusion of a mixture of vegetable bits with a binder, particularly wood chips with a weather-resistant binder, involves precompressing in a compression chamber of an extrusion press the mixture by a compression stroke transverse to the extrusion axis, the compression stroke being delivered by at least one precompression piston. Prior to the precompression elongated bits of the mixture are acted on by an orienting influence so that the elongated bits are deposited substantially parallel to the extrusion axis. The outer layers of the mixture are compressed with a reduced precompression ratio so that the bits oriented prior to precompression remain fixed in position during the subsequent extrusion stroke.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: February 24, 1987
    Assignee: Anton Heggenstaller
    Inventors: Anton Hegenstaller, Xaver Spies
  • Patent number: 4641862
    Abstract: There is disclosed a nozzle liner and a method for its installation for the protection of nozzles of vessels. The nozzle liner comprises a sleeve fitting the internal diameter of the nozzle and having an integral end flange. The nozzle liner is inserted into the nozzle with its integral end flange bearing against the outer face of the ring flange of the nozzle. The nozzle liner is rotationally molded with an end flange and is free of internal stresses and seams. The preferred method of its installation simultaneously flares and bonds the nozzle liner to the lining of the vessel in a fashion which confines the stressed portions of the nozzle liner in the annular lamination area. In this position, the end of the nozzle liner projects inside the vessel and the projecting end is thermoformed to flare it outwardly and form an annular seal laminated against the inner corrosion liner of the vessel. For this purpose a heated flaring and laminating tool is employed.
    Type: Grant
    Filed: March 25, 1985
    Date of Patent: February 10, 1987
    Inventor: Randy A. Gardiner
  • Patent number: 4639396
    Abstract: An extrusion drawn elongated thread-like filament comprising a minor proportion of elongated metal fibers embedded in a major proportion of thermoplastic polymer wherein the melting temperature of said metal is within the softening to molten range of said polymer and wherein said metal fiber is unidirectional and extends into the elongated length of said polymer.
    Type: Grant
    Filed: July 19, 1984
    Date of Patent: January 27, 1987
    Assignee: Princeton Polymer Laboratories
    Inventor: Mohammad A. Semsarzadeh
  • Patent number: 4636547
    Abstract: A molding composition which is essentially composed of a mixture of at least two polymers based on vinyl chloride and at least one water-soluble surfactant is described. One of the polymers is a sinterable vinyl chloride/alkyl acrylate copolymer which can contain, in addition, polymerized units of vinyl acetate and ethylene. At least one further polymer is a vinyl chloride polymer which can contain up to 5% by weight of polymerized units of vinyl acetate and ethylene. The molding composition is suitable for the production of sintered, porous, flexible moldings, in particular separator compartments for electric cells.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: January 13, 1987
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Manfred Engelmann, Helmut Kraus, Otto Plewan
  • Patent number: 4623505
    Abstract: A method of producing unitary hollow structures, for example radomes, comprised of fiber reinforced plastic with a large percentage of the fibers being randomly oriented in directions essentially parallel to the wall surfaces of the structures and with at least one surface having grooves to reduce microwave reflection is presented. The structures are produced by packing a layer of fiber filled polymeric material in powder form around a mandrel which may have a pattern of grooves of ridges in its outer surface. The mandrel and packed powder are subjected to isostatic pressing to properly orient the fibers and achieve a density increase and powder cohesion. The pressed structure is sintered and the outer surface subesquently machined to a finished contour.
    Type: Grant
    Filed: January 25, 1982
    Date of Patent: November 18, 1986
    Assignee: Rogers Corporation
    Inventor: G. Robert Traut
  • Patent number: 4623589
    Abstract: Novel particulate polymeric materials which can be arranged in a predetermined three dimensional pattern in or on a surface, fused and cooled to provide fused, three dimensional polymeric articles. The particulate polymeric materials have the capability to provide a release coating about the fused polymeric article which permits removal of the article from the surface carrying the article.
    Type: Grant
    Filed: February 13, 1985
    Date of Patent: November 18, 1986
    Assignee: USM Corporation
    Inventor: Robert C. Simmonds, Jr.
  • Patent number: 4615859
    Abstract: A radome being a unitary structure comprised of a fiber reinforced plastic is produced with a large percentage of the fibers being randomly oriented in a plane parallel to the inner surface of the radome. The radome is produced by packing a layer of fiber filled powder around a mandrel having its outer contour resemble the inner contour of the radome. The mandrel and packed powder are then subjected to isostatic pressing to properly orient the fibers. The radome is finished by sintering the powder and removing the finished form from the mandrel.
    Type: Grant
    Filed: May 13, 1981
    Date of Patent: October 7, 1986
    Assignee: Rogers Corporation
    Inventor: G. Robert Traut
  • Patent number: 4608317
    Abstract: A method for manufacturing a metal sintered body disclosed herein is characterized by the use of steps of: mixing 70 to 90 weight % of self-fluxing alloy powder and 10 to 30 weight % of metal powder of high melting point having a higher melting point than that of the self-soluble metal powder and in which the self-fluxing alloy powder is liable to be deposited thereon to obtain a metal powder having a sintering property; using a material in which 1 to 10 weight % of plastic binder is kneaded with the metal powder having a sintering property to obtain a molded body having a predetermined shape; and sintering the molded body at a temperature in excess of a liquid phase line of the self-fluxing alloy powder.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: August 26, 1986
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Osamu Kobayashi, Hiroshi Sasaki, Toshiki Kaneko, Hideaki Ikeda, Yoshihisa Yamamura
  • Patent number: 4597928
    Abstract: Disclosed in accordance with the invention is a method for fiberboard manufacture comprising the steps of steaming and grinding woodchips to obtain a wood pulp, using said wood pulp to prepare a slurry of wood pulp in water, mixing said slurry with a binder, a cure catalyst for the binder, a water-repellent additive, peat, and carbamide to obtain a mixture, casting said mixture and dewatering said mixture to obtain a mat, and compacting said mat to obtain fiberboard which is subjected to heat treatment, in which method the peat used has a moisture content of between 25 and 70 percent and the peat content in said mixture is between 2.5 and 50 percent by mass, with the ratio of absolutely dry peat to said binder equal to between 1.0-7:1.0, respectively, while the carbamide content in said mixture is between 0.2 and 2.0 percent by mass, with the ratio of said carbamide to said binder equal to between 0.02-1:1, respectively.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: July 1, 1986
    Assignees: Leningradsky Tekhnologichesky Institute Tselljulozno-Bumazhnoi Promyshlennosti, Proizvodstvennoe Obiedinenie "Litbumprom"
    Inventors: Otto A. Terentiev, Anatoly V. Burov, Ekaterina Y. Vorobieva, Ekaterina I. Grudinka, Gennady T. Nesterchuk, Oleg I. Shapovalov, Khamdam U. Usmanov, Shavkat M. Mirkamilov, Tolkun M. Mirkamilov, Vladimir V. Sharkov
  • Patent number: 4596734
    Abstract: A composite (10) which presents a layer (20) of ultra-high molecular weight polyethylene as the wear resistant surface. The polyethylene layer (20) is secured to a metallic backing plate (12) by virtue of an elastomeric layer (13) that is interposed between the metallic backing plate (12) and the polyethylene layer (20) and is bonded to each without the polyethylene and the metallic backing plate being otherwise bonded to each other. This configuration provides a means by which to mount a wear resistant polyethylene layer from a metallic backing plate and at the same time accommodate the difference between the disparate coefficients of expansion of polyethylene and metal.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: June 24, 1986
    Assignee: The B. F. Goodrich Company
    Inventor: James H. Kramer
  • Patent number: 4579892
    Abstract: A low cost method of binding lignocellulosic materials utilizing a novel ammonium based spent sulphite liquor, with phenol and formaldehyde or phenol-formaldehyde thermosetting resin as the binder is disclosed. Phenol-formaldehyde which normally reacts with ammonium lignosulfonate under acidic conditions and is unstable under these conditions, can be dispersed or otherwise held in suspension and can be mixed direct with the material by spraying. The constituants of the novel binder can also be mechanically dispersed when in dry powder form. The binder has improved adhesion characteristics and a shorter cure time over existing binders using a spent sulphite liquor base when in combination with phenol-formaldehyde.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: April 1, 1986
    Assignee: Forintek Canada Corp.
    Inventors: Louis R. Calve, Gilles G. Brunette
  • Patent number: 4568581
    Abstract: Three dimensional molded articles suitable for use as fibrous surfaced panels for automobile trunk compartments and the like are produced by molding a heated non-woven web formed of a blend of relatively high melting fibers and relatively low melting thermoplastic fibers. The low melting fibers form a multiplicity of bonds which impart shape retentive rigidity to the nonplanar three dimensional web. A characteristic feature of the molded article is that the low melting fibers present at one surface of the web have a fibrous form, while the low melting fibers present at the opposite surface of the web have portions which exhibit a nonfibrous fused form and form said bonds.
    Type: Grant
    Filed: September 12, 1984
    Date of Patent: February 4, 1986
    Assignee: Collins & Aikman Corporation
    Inventor: Clarence A. Peoples, Jr.
  • Patent number: 4563318
    Abstract: A polyvinyl chloride molding composition, suitable for the manufacture of sheet stock according to the "Luvitherm" method, consists essentially of emulsion polyvinyl chloride and 0.5-3.0% by weight of a processing aid which is a copolymer of 40-90% by weight of vinyl monomers whose corresponding homopolymers have a glass point below 0.degree. C., and of 10-60% by weight of vinyl monomers whose corresponding homopolymers have a glass transition temperature above 20.degree. C.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: January 7, 1986
    Assignee: Huels Aktiengesellschaft
    Inventor: Karsten Flatau
  • Patent number: 4563261
    Abstract: A gas diffusion electrode for the reduction of oxygen, which contains a hydrophobic electro-catalyst layer, is described. One side of this layer is covered with a hydrophilic layer which is composed of at least one transition metal or an oxide or mixed oxide of transition metals and can also contain a current collector in the form of a mesh. For producing the gas diffusion electrode, a hydrophobic electro-catalyst layer can first be prepared from a pulverulent mixture which contains the electro-catalyst and a hydrophobic polymer, and at least one transition metal or an oxide or mixed oxide of transition metals can be applied in a finely divided form to one side of this layer and bonded to the hydrophobic electro-catalyst layer by the application of pressure.
    Type: Grant
    Filed: September 6, 1984
    Date of Patent: January 7, 1986
    Assignees: Hoechst Aktiengesellschaft, Hoechst Aktiengesellschaft
    Inventors: Rudolf Staab, Jurgen Russow
  • Patent number: 4562025
    Abstract: Apparatus and a process for manufacturing multiple color thin walled hollow shells for parts such as automobile door panels, controls and instrument panels from thermoplastic plastisol includes a plastisol box divider to form two or more compartments in a plastisol charge box and means for joining the charge box divider end-to-end with a mold separation edge on an open-ended heated mold for separating the mold into two or more sections; each compartment of the charge box has a different color plastisol. The charge box and mold are joined and then are rotated so that the plastisol is distributed into each mold section by gravity flow with the plastisol from each section flowing to the divider which separates the colors so as to form two or more tones on a resultant shell of cured material.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: December 31, 1985
    Assignee: Ex-Cell-O Corporation
    Inventor: John D. Gray
  • Patent number: 4560766
    Abstract: A halogenated hydantoin product and method of producing same for use as e.g. a bleaching agent or disinfectant comprising a halogenated hydantoin of the formula ##STR1## wherein R is methyl or ethyl and X.sub.1 and X.sub.2 which may be the same or different is chlorine or bromine, either as the sole constituent or in admixture with halogenated dimethylhydantoins. The products are substantially dust-free, free-flowing and upon compaction form a solid product of high physical integrity.
    Type: Grant
    Filed: February 9, 1983
    Date of Patent: December 24, 1985
    Assignee: Glyco Chemicals, Inc.
    Inventors: Theodore A. Girard, Lloyd C. Franklin
  • Patent number: 4547327
    Abstract: A porous implantable oral prosthesis which can be used to replicate and replace any hard tissue portion of the mouth such as bone and teeth is described. The prosthesis comprises sintered polymeric particles coated with a hydrophilic material. The polymeric particles vary in size so as to provide an area of relatively coarse porosity where the prosthesis is intended to interface with bone tissue and relatively fine porosity where it is intended to interface with soft tissue. A process for producing such prosthesis by filling a mold with appropriate molding compounds comprised of polymeric particles and a hydrophilic monomer, sintering the particles and polymerizing the monomer by dielectric heating, removing the sintered material from the cooled mold, and placing the prosthesis in a hot liquid to remove residues is described. An entire tooth, including a nonporous crown may be produced.
    Type: Grant
    Filed: August 8, 1984
    Date of Patent: October 15, 1985
    Assignee: Medical Biological Sciences, Inc.
    Inventors: Paul F. Bruins, Arthur Ashman
  • Patent number: 4521361
    Abstract: Aqueous plastic molding compositions based on ceramic raw materials characterized by containing a dual binder system consisting of water-soluble and/or water-dispersed air-drying high molecular weight film-forming agents, as well as of water-insoluble thermoplasts of fine particle form sinterable at temperatures below 250.degree. C. and a method of producing molded articles using the said compositions are disclosed.
    Type: Grant
    Filed: August 1, 1983
    Date of Patent: June 4, 1985
    Assignee: T+F Kunststuffe fur Tecknik und Freizeit GmbH
    Inventor: Werner Sommer
  • Patent number: 4518552
    Abstract: A method of producing accurately sized sintered material of ultra high molecular weight polyethylene including the steps of mixing an organic peroxide and a lubricant with an ultra high molecular weight polyethylene powder having more than 1,000,000 of mean molecular weight by a viscosity method and more than 3,000,000 by a light scattering method, and forming a ram extrusion of the mixture. The transverse dimensional accuracy, or displacement, i.e. the difference between the maximum surface diameter and the minimum surface diameter at longitudinally spaced positions of the extruded product, is extremely small, thereby providing highly accurate size, roundness, etc. Further, a product is formed by the method having uniform electroconductivity.
    Type: Grant
    Filed: November 9, 1983
    Date of Patent: May 21, 1985
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Tadao Matsuo, Fumio Matsuoka, Nobuo Yokota, Masaaki Yamamoto
  • Patent number: 4518642
    Abstract: A loudspeaker diaphragm is disclosed which is formed of a slurry of cellulose fibers and polypropylene fibers. In the fabrication of the diaphragm, a felt is made of the slurry, and the felt is subjected to sufficient heat and pressure to fuse the polypropylene fibers together to form a skeleton or matrix which extends through the felt.
    Type: Grant
    Filed: April 15, 1983
    Date of Patent: May 21, 1985
    Assignee: International Jensen Incorporated
    Inventors: George C. Johnston, Michael A. Swieboda
  • Patent number: 4501713
    Abstract: A method for stabilizing the Tmc of PPS subjected to heat treatment in a temperature range between 240.degree. C. and 320.degree. C., particularly during the heating process of an extrusion operation, by increasing the tmperature of the polymer through the 240.degree. C.-320.degree. C. range at a rate of at least 20.degree. C. per minute or by subsequently raising the temperature of the polymer to at least 350.degree. C. for a time sufficient to stabilize the Tmc of the polymer.
    Type: Grant
    Filed: June 15, 1983
    Date of Patent: February 26, 1985
    Assignee: Phillips Petroleum Company
    Inventor: Roy F. Wright
  • Patent number: 4489025
    Abstract: A dimensionally stable asbestos diaphragm is formed by direct coating on the foraminous cathode of an electrolytic cell from an asbestos fiber-particulate polymer slurry, followed by fusion of the thermoplastic polymer.
    Type: Grant
    Filed: December 14, 1978
    Date of Patent: December 18, 1984
    Assignee: Diamond Shamrock Chemicals Company
    Inventors: Robert W. Fenn, III, Emory J. Pless, Richard L. Harris, Kevin J. O'Leary
  • Patent number: 4460530
    Abstract: A method for producing a porous plastic molded product of uniform, predictable porosity throughout. A fluidized airstream of moldable plastic powder is formed. Water may be injected into said fluidized powder airstream for maintaining said powder in a uniform, fluidized dispersion. The moisturized, fluidized, powder airstream is injected into a cavity of a closed mold to fill said mold cavity with said powder. The mold is maintained at a temperature and for a time sufficient to at least partially fuse said powder particles together without melting said particles, thereby to form a porous, plastic molded product. The mold is partially separated for cooling the product which is then discharged from the mold. The product may be further cured by heating the molded product in an oven at a temperature and for a time sufficient to cure said molded product without melting said plastic or glazing said product.
    Type: Grant
    Filed: November 23, 1982
    Date of Patent: July 17, 1984
    Assignee: Teledyne Industries, Inc.
    Inventors: Timothy A. Hanson, David W. Smith
  • Patent number: 4438053
    Abstract: A fibrillated strand is made by a method wherein first a mass of a powder of a high polymer is compressed into a substrate having a density smaller than that of the high polymer and having a multiplicity of gas-filled voids. Then an intense heat beam is played on the substrate to melt the high-polymer powder and simultaneously heat the gas of the voids to explosively enlarge same while the beam and substrate are relatively displaced so that the substrate is melted along a path. The substrate is cooled at least at the path after irradiation by the beam to form a porous strand extending along the path in the substrate. This strand is separated from the substrate and is then at least uniaxially stretched. The beam is a CO.sub.2 TEM.sub.oo -mode laser beam and the method further comprises the step of focussing the laser beam on the substrate. The fused strand of the substrate is cooled so rapidly that it is normally not melted all the way through from top to bottom and from side to side.
    Type: Grant
    Filed: April 9, 1982
    Date of Patent: March 20, 1984
    Assignee: Forschungsinstitut fur Textiltechnologie
    Inventors: Karl-Heinz Banke, Elisabeth Hering, Wilfried Lobel, Dieter Pollack, Gunter Wiedemann, Ute Grell, Ingo Schuler
  • Patent number: 4436682
    Abstract: A flowable thermoplastic polymer powder is fed to the nip of a pair of cooperatively rotating compression rolls whereupon the polymer feed is passed between the rolls which compact and cause the particles to coalesce into a shaped article which thereupon emerges from between the rolls in the form of a sheet or film. During the operation, the circumferential speed of the rolls is maintained essentially equal to the linear speed of the sheet or film exiting therefrom. The sheet or film is withdrawn from between the rolls under tension at a force which is adjusted so as not to exceed the elastic limit of the resulting sheet or film product. Flowable thermosetting polymer powder is also compacted into fully dense products by feeding the powder to the nip of a pair of cooperatively rotating compression rolls, whereupon the polymer feed is passed between rolls which compact and cause the particles to cold weld.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: March 13, 1984
    Assignee: Revere Copper and Brass, Inc.
    Inventor: Walter V. Knopp
  • Patent number: 4420351
    Abstract: A laminated decorative tile particularly for flooring purposes, is made by forming a base layer of granulated cellulosic material in a matrix of fusible plastics, and placing on the base layer a thin decorative layer of cellulosic material with natural holes and recesses therein. After a film of fusible plastic has been applied on the decorative layer the laminate is hot pressed and then immediately cooled in a cold press. The tile obtained has a pleasing appearance because the granules of the base layer have been forced up, in the hot pressing operation, into the holes and recesses of the decorative layer, filling out these holes and recesses. In this embodiment the tile has a smooth wear resisting layer surface but this surface can be provided with a relief pattern such that it conforms to the structure of the decorative layer, if the tile after cooling is heated in a free state, i.e. without press plates.
    Type: Grant
    Filed: April 29, 1982
    Date of Patent: December 13, 1983
    Assignee: Tarkett AB
    Inventors: Eduard Lussi, Ulf L. Ahlstedt, Sven A. Ryden
  • Patent number: 4417932
    Abstract: A process for the continuous production of a sheeting of stratified material from synthetic resin foam particles especially particles of crosslinking polyethylene includes the steps of scattering foam particles onto a conveying means, preheating the foam particles during conveyance, superficially to a temperature in the range between 100.degree. and 160.degree. C.; thereafter feeding the thus-preheated foam particles to means defining a free falling zone; causing the preheated particle to free-fall within said zone; further heating the particles during falling, to a temperature of at least 200.degree. C., and, at the end of the free fall, piling up the particles on a support surface; compacting the piled-up particles into a sheet-like layer on said surface; and sizing the preliminarily compacted sheet with simultaneous cooling.
    Type: Grant
    Filed: September 25, 1981
    Date of Patent: November 29, 1983
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Hans-Ulrich Breitscheidel, Paul Spielau, Franz-Werner Alfter
  • Patent number: 4408807
    Abstract: Apparatus and method for direct molding of porous retainers with unobstructed pores for proper lubricant dispensing for use in instrument ball bearings. A method for forming porous ball bearing retainers includes the steps of filling a complex mold with a prescribed quantity of polyamide-imide powder, compressing the powder at high temperatures, and curing the compressed powder for a specified time at high temperatures. A mold for producing such compression molded porous retainers includes a housing having a centrally disposed bore extending longitudinally therethrough. Two plungers are inserted into the bore, one from either end thereof. One of the plungers is spring biased and the inner termination of both plungers are spaced a predetermined distance from one another within the bore. A mandrel is inserted into the bore from one end and passes within both plungers. In this fashion, the inner terminations of the plungers define the top and bottom of the retainer mold cavity.
    Type: Grant
    Filed: February 11, 1981
    Date of Patent: October 11, 1983
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventor: Herbert B. Singer
  • Patent number: 4409170
    Abstract: A process and apparatus are provided for pressing fibrous, particulate or laminar materials to provide laminated products of low to medium density. The system is characterized by the use of lightweight pressing plates which have horizontal and vertical permeability, by the sealing of the press to provide a closed environment, and by heating substantially entirely by the use of a fluid heat carrier which heats the materials by convection.
    Type: Grant
    Filed: December 31, 1981
    Date of Patent: October 11, 1983
    Assignee: John Jansky
    Inventor: John Stofko
  • Patent number: 4405543
    Abstract: A material suitable for thermosetting includes a collection of hollow particles adhesively mixed with a thermosetting resin in such proportions that the mixture exists in a granular form and may be converted by thermosetting into a fused solid mass having a density not greater than 0.5 grams per cubic centimeter.The particles may be glass microbubbles or phenolic microballoons and the resin may be a hardenable Friedel-Crafts resin. The material according to the invention is more suitable for packing into shaped cavities than known resins including those containing filler particles.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: September 20, 1983
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: David J. Murphy, Leslie N. Phillips
  • Patent number: 4397977
    Abstract: A flame retarded composition containing tetrahalophthalate plasticizer and a halogenated resin is provided.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: August 9, 1983
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Patent number: 4396731
    Abstract: A solid composition of coated water-soluble polymer is made from 80 to 250 parts b.w. of solid particles of at least one water-soluble polymer coated with 100 parts b.w. of at least one paraffinic product solid at room temperature and whose melting point is preferably from 40.degree. to 90.degree. C. The solid composition is made by dispersing particles of the water-soluble polymer in the molten paraffinic product and then cooling down to room temperature.
    Type: Grant
    Filed: July 24, 1981
    Date of Patent: August 2, 1983
    Assignee: Institut Francais du Petrole
    Inventors: Francois Dawans, Daniel Binet, Norbert Kohler, Quang Dans Vu
  • Patent number: 4396566
    Abstract: A process for the continuous manufacture of sheeting from thermoplastic synthetic resins includes the steps of applying thermoplastic synthetic resin, in the form of particles, such as shreds, crumbs, cuttings, pieces, chips, or the like, continuously as a sheet-like layer of raw material to a moving support; passing the raw material layer through a heating zone to thereby preheat the material layer to a temperature approximately in the range from 100.degree. to 140.degree. C.; pressing the preheated material layer continuously over its full area during travel through a treatment zone so that, in a first phase, the raw material layer is compacted and welded under the effect of a pressure of from about 10 to 60 kp/cm.sup.2 and at the same time the material layer is heated to a temperature in the range from about 160.degree. to 220.degree.
    Type: Grant
    Filed: August 18, 1981
    Date of Patent: August 2, 1983
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Hans Brinkmann, Bernhard Kraemer, Herbert Schulte, Uwe Sommermeyer
  • Patent number: 4396561
    Abstract: In the manufacture of mineral-wool mats or slabs, the raw materials are melted in a melting furnace and are spun to fibers in a spinner. The fibers, after admixture of a resin binder, are deposited so as to be formed to wool mats in a collecting chamber, then cured, trimmed at the sides and cut up into lengths. Both during spinning and during trimming, cutting up into lengths and a subsequent final inspection and check for defects, waste products arise. In order not to have to deliver these waste products, as hitherto, to a proper dump but, instead, to be able to recycle them direct to the production process, the waste products are broken up into smaller pieces and/or unravelled, heated and then briquetted while hot, whereupon the briquettes, possibly after cooling down and interim storage, are combined with the raw materials which are to be melted and thus returned via the melting furnace into the production process.
    Type: Grant
    Filed: October 9, 1980
    Date of Patent: August 2, 1983
    Inventor: Horst Liebert
  • Patent number: 4390489
    Abstract: Thermoplastic resin compositions are formed into shaped objects in a rapid-stamping process when such compositions are pre-heated and supported upon a metal foil support. The heated and relatively flowable composition is then readily transferred by means of the foil carrier to a stamping press by automatic or manual means. The thermoplastic composition may be filled and/or reinforced, and may be in the form of sheets, logs, cakes or other irregular shaped objects.
    Type: Grant
    Filed: May 27, 1980
    Date of Patent: June 28, 1983
    Assignee: Allied Corporation
    Inventor: Leon Segal
  • Patent number: 4386041
    Abstract: A method for the manufacture of a cushioning material comprising the steps of compressing three-dimensionally crimped short synthetic filaments to form a shaped mass of filaments, applying an adhesive agent to the resultant shaped mass of filaments, then heating the shaped mass thereby drying the adhesive agent adhering to said short filaments and uniting adjacent filaments at the points of their mutual contact, and pressing the resultant crude cushioning material in the presence of steam thereby compressing the crude cushioning material.
    Type: Grant
    Filed: June 19, 1981
    Date of Patent: May 31, 1983
    Inventor: Sadaaki Takagi
  • Patent number: 4375441
    Abstract: A process for forming sintered porous polymeric articles by the steps of sintering preforms of polymeric particles with dielectric heat, or with dielectric heat in combination with conventional heating techniques. Sintered porous polymeric articles made of rubber-modified nitrile resins in accordance with the foregoing processes are also disclosed.
    Type: Grant
    Filed: December 18, 1980
    Date of Patent: March 1, 1983
    Assignee: The Standard Oil Company
    Inventors: Richard C. Adams, Albert J. Herold
  • Patent number: 4363771
    Abstract: A method for producing non-oriented film that comprises depositing high molecular weight polyolefin powder on a smooth non-adherent substrate, sintering the deposited powder, contacting the sintered powder with rollers at the sintering temperature at a pressure sufficient to effect densification of the polyolefin normal to the surface but insufficient to effect significant longitudinal flow of the polyolefin to form a void-free film, and stripping said film from said substrate.
    Type: Grant
    Filed: June 24, 1981
    Date of Patent: December 14, 1982
    Assignee: Mobil Oil Corporation
    Inventor: James G. Murray
  • Patent number: 4359132
    Abstract: The disclosure is of a high performance speaker diaphragm which comprises needled and interlocked textile staple fibers of a first, relatively heat-resistant fiber and a second, heat-softenable fiber. The fibers are molded together to soften the second fiber whereby it interlocks with the first fiber.
    Type: Grant
    Filed: May 14, 1981
    Date of Patent: November 16, 1982
    Assignee: Albany International Corp.
    Inventors: Roy B. Parker, Daniel R. Levesque
  • Patent number: 4358418
    Abstract: A method of and apparatus for the cold extrusion of a mixture of plant particles and a binder, especially for the production of load-bearing beams and similar shaped bodies in which the plant particles are wood chips or the like, utilizes a plunger, ram or piston for displacement of the mixture into the extrusion passages (in which hardening can occur) under conditions such that the material flows during compaction and is compressed with a densification ratio of 2:1 to 4:1 (preferably 3:1), a plunger stroke of 400 to 800 mm (preferably 600 mm) and a velocity of the plunger between 0.04 and 1.5 meters per second (preferably 0.06 meters per second).
    Type: Grant
    Filed: August 7, 1980
    Date of Patent: November 9, 1982
    Inventor: Anton Heggenstaller
  • Patent number: 4353855
    Abstract: Disclosed is a method and apparatus for making stress free plastic articles from plastic particles such as powder utilizing heat and pressure in which a quantity of plastic particles is supplied to a first member, a flexible diaphragm is disposed in opposed relationship to said first member with said plastic particles therebetween, a microporous air release means is positioned between said plastic particles and said flexible diaphragm, a fluid-like pressure is applied to said diaphragm to cause said diaphragm to apply an even fluid-like pressure through said air release means to said plastic particles, heat is applied to said plastic particles while under said fluid-like pressure and any entrapped gases between the particles is vented by means of the air release means. The pressure and heat are controlled to effect a consolidation of the plastic particles into the article.
    Type: Grant
    Filed: December 23, 1980
    Date of Patent: October 12, 1982
    Inventor: Armen Garabedian
  • Patent number: 4352766
    Abstract: A scrap-free, substantially solid phase, relatively low temperature economical process for rapidly making plastic articles from resinous powders wherein the resultant articles can comprise various polymers including oriented polymers; polymers with a high practical heat distortion temperature; expanded polymers; ultra high molecular weight polymers; blended structures of two or more materials; or multilayered structures. The resinous powders are initially compressed into briquettes, which briquettes are heated to a temperature in the range from about the alpha transition temperature to less than the melting point or melt temperature of the polymer therein to both somewhat soften and sinter the briquettes. The sintered briquettes are forged under conditions which permit substantial plug flow deformation into preforms whereby fusion of the sintered resin powder particles occurs.
    Type: Grant
    Filed: November 24, 1980
    Date of Patent: October 5, 1982
    Assignee: The Dow Chemical Co.
    Inventors: Norbert L. Bradley, Kenneth J. Cleereman, Ritchie A. Wessling
  • Patent number: 4342813
    Abstract: A fused nonwoven fabric of thermoplastic fibers having a first surface and a second surface opposite the first surface is produced by exposing at least one of the first and second surfaces of the fabric to infrared radiation and contacting at least one of the first and second surfaces of the fabric with at least one heated roll having a temperature sufficient to fuse together the fibers of the surface in contact with the heated roll.
    Type: Grant
    Filed: March 14, 1978
    Date of Patent: August 3, 1982
    Assignee: Phillips Petroleum Company
    Inventor: Wayne K. Erickson
  • Patent number: RE31825
    Abstract: The method of autogenously bonding a nonwoven web formed predominantly of thermoplastic fibers is characterized by the steps of directing heat into the web from only one surface thereof to preheat the web, and then directing the preheated web through a bonding nip formed between opposed rolls, one of said rolls being hotter than the other roll, being capable of heating the web surface it engages to a temperature above the melt point of the thermoplastic fibers and being positioned to engage the surface of the web opposite the one into which heat was directed during the preheating operation; said webs being preheated by means completely independent of the opposed rolls that form the bonding nip, and most preferably by infrared panels. The nonwoven product formed in accordance with this method also forms a part of the instant invention.
    Type: Grant
    Filed: January 3, 1984
    Date of Patent: February 5, 1985
    Assignee: Scott Paper Company
    Inventors: Charles R. Mason, David K. Osteen, Lawrence Vaalburg
  • Patent number: RE32392
    Abstract: A porous catalyst matrix used for the decomposition of aqueous hypochlorite solutions is disclosed along with the process for its use. The catalyst is prepared by sintering a powdered mixture of a particular metal oxide or hydroxide and a thermoplastic polyolefin or halogenated polyolefin.
    Type: Grant
    Filed: August 21, 1985
    Date of Patent: April 7, 1987
    Assignee: Pennwalt Corporation
    Inventors: Roger T. Clark, David M. Gardner