Patents Examined by James C. Cannon
  • Patent number: 5804277
    Abstract: A fiber reinforced composite structure and method for fabricating the composite, are described wherein four sets of mechanically flexible fibers are interwoven in a three-dimensional woven structure wherein each fiber is woven through the structure generally along one of the four directions defined generally parallel to a body diagonal of a cube, and wherein the woven structure is impregnated with polymeric, metallic or ceramic matrix material to form a composite material which is braced against deformation by shear applied in any orientation.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: September 8, 1998
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Kenneth H. G. Ashbee
  • Patent number: 5800908
    Abstract: The present invention is an improved device for delivering a release agent to fuser rollers employed in various printer devices, such as laser printers, fax machines, copier machines, etc. The release agent delivery device of the present invention comprises an elongated web of microporous membrane (e.g., expanded polytetrafluoroethylene) bonded to a substrate, filled with release agent, and mounted between two shafts. The web spans across the fuser roller so that the roller is simultaneously cleaned and oiled during normal operation. When the portion of the web in contact with the fuser roller becomes contaminated or expends its release agent supply, the web can be advanced to place a fresh surface in contact with the fuser roller.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: September 1, 1998
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Alex R. Hobson, Robert L. Sassa, Beth P. Powell
  • Patent number: 5798167
    Abstract: There is disclosed a thermally bonded spunbond web of thermoplastic filaments and a nonwoven fabric laminate comprising an internal layer of meltblown thermoplastic microfibers sandwiched between two layers of spunbond thermoplastic filaments. The spunbond web and the spunbond layers of the fabric laminate consist of thermoplastic filaments which are formed from a mixture of a thermoplastic polymer and an effective amount of a nucleating agent. The layers are bonded by thermal spot bonding. In the preferred embodiment, the thermoplastic polymer is polypropylene with a melt-flow rate of at 230.degree. C. of or greater than 12 grams per ten minutes. Also in the preferred embodiment, the nucleating agent constitutes from about 0.1 to 0.3 percent by weight of the mixture of polypropylene and nucleating agent.
    Type: Grant
    Filed: August 2, 1994
    Date of Patent: August 25, 1998
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Linda Ann Connor, Peter Maddern
  • Patent number: 5789326
    Abstract: A binder is applied to fibers to bind particles to the fibers. The fibers have hydrogen bonding functional groups. The particles have functional groups capable of forming a hydrogen bond or a coordinate covalent bond. The binder comprises binder molecules, the binder molecules having at least one functional group that is capable of forming a hydrogen bond or a coordinate covalent bond with the particles, and at least one functional group that is capable of forming a hydrogen bond with the fibers. A substantial portion of the particles that are adhered to the fibers are adhered in particulate form by hydrogen bonds or coordinate covalent bonds to the binder, and the binder is in turn adhered to the fibers by hydrogen bonds. Fibers containing particles bound by this method are easily densified.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: August 4, 1998
    Assignee: Weyerhaeuser Company
    Inventors: Michael R. Hansen, Richard H. Young, Sr.
  • Patent number: 5788770
    Abstract: The present invention is an improved device for delivering a release agent to fuser rollers employed in various printer devices, such as laser printers, fax machines, copier machines, etc. The release agent delivery device of the present invention comprises an elongated web of microporous membrane (e.g., expanded polytetrafluoroethylene) bonded to a substrate, filled with release agent, and mounted between two shafts. The web spans across the fuser roller so that the roller is simultaneously cleaned and oiled during normal operation. When the portion of the web in contact with the fuser roller becomes contaminated or expends its release agent supply, the web can be advanced to place a fresh surface in contact with the fuser roller.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: August 4, 1998
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Alex R. Hobson, Robert L. Sassa, Beth P. Powell
  • Patent number: 5789045
    Abstract: In the present invention, various sizes of non-wetting droplets are inserted into microtube devices of various shapes having therein a gas or wetting fluid which causes the droplets to movement in response to fluid pressure. The droplets may translate within a void of the microtube device which is filled with the gas or wetting fluid or rotate in a fixed position. The nonwetting fluid may also be formed into rings within ring shaped channels. The microtube devices may operate to stop fluid flow, act as a check-valve, act as a flow restrictor, act as a flow regulator, act as a support for a turning axle, and act as a logic device, for example.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: August 4, 1998
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Phillip G. Wapner, Wesley P. Hoffman, Gregory Price
  • Patent number: 5783505
    Abstract: Compostable and biodegradable compositions of a blend of natural cellulosic and thermoplastic biodegradable fibers are disclosed. Typically the compositions include cotton and cellulose acetate. A process for the manufacture of a nonwoven composition which comprises a compostable blend of natural cellulosic fibers such as cotton and thermoplastic biodegradable fibers such as cellulose acetate; the blend is then carded to obtain the nonwoven composition.
    Type: Grant
    Filed: January 4, 1996
    Date of Patent: July 21, 1998
    Assignee: The University of Tennessee Research Corporation
    Inventors: Kermit E. Duckett, Gajanan S. Bhat, Hageun Suh
  • Patent number: 5783277
    Abstract: An integrated three-dimensional knit spacer fabric is provided. The fabric includes identical first and second fabric layers, and a yarn interconnecting the two layers. Both the layers of the fabric have their surfaces napped.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: July 21, 1998
    Assignee: Malden Mills Industries, Inc.
    Inventors: Moshe Rock, Karl Lohmueller, Douglas Lumb
  • Patent number: 5783271
    Abstract: A process for the production of biodegradable aliphatic polyester particles by (co)polymerizing 2-oxetanone or a mixture containing at least 80% by weight of 2-oxetanone and up to 20% by weight of a cyclic ester or cyclic ether other than 2-oxetanone in the presence of a polymerization initiator supported on a carrier in which an ion polymerization initiator is supported on poly(2-oxetanone) in a liquid medium having a solubility parameter of about 15 to about 18 MPa.sup.1/2 and being capable of dissolving 2-oxetanone, and in a polymerizing apparatus having an internal surface formed of a material which is free of polarity or whose polarity is very small, to form a particulate aliphatic polyester; and a biodegradable aliphatic polyester melt-extrusion film, which comprises the biodegradable aliphatic polyester having a weight average molecular weight of 20,000 to 2,000,000, and having a water vapor transmission rate of 300 to 700 g/m.sup.2 .multidot.24 hours.multidot.25 .mu.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: July 21, 1998
    Assignee: Tokuyama Corporation
    Inventors: Haruo Nishida, Mitsuhiro Yamashita, Norikazu Hattori, Yoshiki Ochi, Tetsuo Kuwaki
  • Patent number: 5783278
    Abstract: This invention provides a reinforcing woven fabric using as weaving threads flat and substantially nontwisted multifilaments of reinforcing fiber having less than 0.5 wt. % of sizing agent provided thereto and a binding property of 400-800 mm in hook drop value, and a method and an apparatus for manufacturing a reinforcing woven fabric by weaving the multifilaments of reinforcing fiber as warps and wefts. A reinforcing woven fabric having a small thickness and an extremely high covering factor and capable of indicating a high strength can be obtained at a low cost as a substrate for reinforcing composite materials.
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: July 21, 1998
    Assignee: Toray Industries, Inc.
    Inventors: Akira Nishimura, Kiyoshi Homma, Ikuo Horibe
  • Patent number: 5773374
    Abstract: Composite films and film laminates comprising at least one elastomeric core and a surrounding nonelastomeric matrix preferably prepared by coextrusion. The film when stretched and allowed to recover will create an elastomeric composite.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: June 30, 1998
    Inventors: Leigh E. Wood, Dennis L. Krueger, Michael R. Gorman, Randall L. Alberg
  • Patent number: 5770528
    Abstract: The present invention is directed to a method of producing methylated hydroxypropylcellulose (m-HPC). By controlling the degree of methylation, one can manipulate the lower critical solution temperature (LCST) of the m-HPC polymer to below room temperature and thereby stabilize the polymer in water above about 30.degree. C. The present invention is also directed to binder compositions, fibrous substrates, water-dispersible products and thermoformable products containing the m-HPC polymer.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: June 23, 1998
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Pavneet Singh Mumick, Yihua Chang
  • Patent number: 5767022
    Abstract: Composition and process for the preparation of high temperature stable continuous glass fibers with an upper temperature use limit of 2300.degree. F. are provided. The compositional formulation, in mole percent, is 62-85% SiO.sub.2, 10-20% Al.sub.2 O.sub.3, 5-15% MgO, 0.5-5% TiO.sub.x, and 0-5% ZrO.sub.2. The continuous fibers are prepared by an economical direct melt method, and demonstrate high tensile strength, high Young's modulus, and low linear thermal shrinkage characteristics. Friction pads containing these high temperature stable continuous glass fibers are also provided.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: June 16, 1998
    Assignee: Unifrax Corporation
    Inventors: Thomas M. Clere, James Olson
  • Patent number: 5766425
    Abstract: The surface of a web or film is modified to impart the material with improved properties including wettability, printability, adhesion and static reduction. Such surface modification is achieved with an electrode structure which causes a filamentary discharge to pass generally horizontally across a surface of the electrode structure. A substrate to be treated is then positioned adjacent to the surface of the electrode structure so that the filamentary discharge is caused to flow horizontally across the surface of the substrate, in turn modifying the surface of the substrate and achieving the desired improvement in properties.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: June 16, 1998
    Assignee: The University of Tennessee Research Corporation
    Inventor: Igor Alexeff
  • Patent number: 5766724
    Abstract: Thermoplastic, thermoshapable composite laminate bars, an orthopedic brace using the shaped composite bars as integral components, and a method of thermoshaping the composite bars for use as fitted components in the orthopedic brace are provided. The composite bars contain multiple fiber layers oriented in at least two directions with respect to the bar length to provide high flexural and torsional strength. The novel method of thermoshaping yields improved results over prior thermoshaping methods by providing an uncomplicated shaping capability while maintaining the structural and mechanical properties of the composite bar.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: June 16, 1998
    Inventors: Dilip K. Tailor, Mark F. Lang, Paul S. Hruska, Kevin J. McConnell, Beverly Lucek
  • Patent number: 5763103
    Abstract: A novel flexible biregional carbonaceous fiber is disclosed comprising an inner core region of a thermoplastic polymeric material and an outer region of a carbonaceous sheath. The flexible biregional carbonaceous fibers are particularly characterized by having a ratio of the radius of the core region with respect to the total radius of the fiber (r:R) of from about 1:4 to about 1:1.05, a density of from about 1.45 to about 1.87 g/cm.sup.3, and a bending strain value of from greater than 0.01 to less than 50%. In a further embodiment of the invention, a biregional precursor fiber is disclosed having an inner core region of a thermoplastic polymeric material and an outer sheath region of a oxidation stabilized, thermoset polymeric material. The oxidation stabilized precursor fiber is characterized by having a density of from about 1.20 to about 1.32 g/cm.sup.3. The invention further resides in methods of making the biregional fibers.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: June 9, 1998
    Inventor: Francis Patrick McCullough
  • Patent number: 5763331
    Abstract: An absorbent composite, in particular for diapers, sanitary pads or napkins, mattress pads, incontinence briefs and liners or the like, has a support layer onto which a layer of a superabsorbent granular material is applied. A portion of the absorbent material is intimately connected to, particularly glued to, the support layer.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: June 9, 1998
    Inventor: Rudolf Demhartner
  • Patent number: 5759927
    Abstract: A glass-fiber-containing nonwoven polymer web is prepared by providing a nonwoven polymer web, applying a layer of glass fibers onto the nonwoven polymer web, and encapsulating the glass fibers into the nonwoven polymer web utilizing heat and pressure. Alternatively, a glass-fiber-containing polymer web is prepared by providing a first nonwoven polymer web, applying a layer of glass fibers onto the first nonwoven polymer web, superposing over the layer of glass fibers a second nonwoven polymer web, and laminating together the assemblage to encapsulate the glass fibers.
    Type: Grant
    Filed: July 24, 1995
    Date of Patent: June 2, 1998
    Inventor: Brian L. Meeker
  • Patent number: 5759926
    Abstract: The present invention provides a splittable conjugate fiber containing at least two incompatible polymers that are arranged in distinct segments across the cross-section of the fiber, wherein the segments are continuous along the length of the fiber. The fiber can be characterized in that the segments of the fiber dissociate in less than about 30 seconds when contacted with a hot aqueous fibrillation-inducing medium. The invention also provides a fabric containing the split fibers produced from the precursor splittable conjugate fiber and laminates containing the split fiber fabric. Additionally provided is a process for producing the split fibers.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: June 2, 1998
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Richard Daniel Pike, Philip Anthony Sasse, Edward Jason White, Ty Jackson Stokes
  • Patent number: 5759929
    Abstract: A bio-degradable composite nonwoven fabric for plant cultivation includes a wood pulp paper sheet laminated on a bio-degradable aliphatic polyester filament nonwoven fabric, wherein the polyester filaments and the pulp fibers are entangled to each other and a plurality of spot regions which are spaced from each other, are substantially free from the pulp fibers and have a decreased distribution density of the polyester filaments of 30 to 50%, an area of 0.16 to 16 mm.sup.2 and a total area coresponding to 5 to 60% of the total surface area of the composite nonwoven fabric, are formed. The polyester filament distribution density is defined as the ratio of the total area of the polyester filaments appearing within the spot regions to the total surface area of the spot regions, determined from photographs of the spot regions.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: June 2, 1998
    Assignee: New Oji Paper Co., Ltd.
    Inventors: Hideo Ikezawa, Masaru Kadota, Tomotsugu Miyoshi