Patents Examined by Peter Chin
  • Patent number: 6939441
    Abstract: A stock size intended to be added as a solution to the pulp stock in connection with the manufacture of paper or board in order to improve the characteristics of the paper or board, e.g.), to reduce the absorption of liquids, to increase the dry strength and wet strength. The stock size contains a polymer, which is based on styrene maleic acid and stabilised with a polysaccharide, such as cationic starch. The stock size is advantageously prepared in a steam jet cooker. The stock size is suitably used as a stock size in the manufacturing of liquid packaging board.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: September 6, 2005
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Markku Nurminen, Mari Niinikoski
  • Patent number: 6939438
    Abstract: An apparatus for loading fibers in a fiber suspension with calcium carbonate has a housing with an inlet and an accept outlet. A rotatable distribution member is positioned within the housing. A rotor and stator assembly is positioned within the housing radially outside of the distribution member. A toothed ring is interposed between the distribution rotor and the rotor and stator assembly. The toothed ring and the rotor and stator assembly define a gas ring therebetween. A reactant gas supply is fluidly coupled with the gas ring. A method for loading fibers in a fiber suspension with calcium carbonate can be practiced with the apparatus, The method controls various factors and provides low shear treatment of the suspension to promote selective crystal formation.
    Type: Grant
    Filed: November 13, 2003
    Date of Patent: September 6, 2005
    Assignee: Voith Paper Patent GmbH
    Inventor: Klaus Doelle
  • Patent number: 6936136
    Abstract: The disclosed invention is directed to pulp fibers suitable for forming a wet-laid paper product which include amino-functionality which is non-extractable in an aqueous phase. The pulp fibers may be prepared by applying an amino-functional additive to a fibrous web prior to the finishing operation at a pulp mill. The fibrous web may then be repulped at a papermaking machine to form a paper web which includes the amino-functionalized fibers of the present invention. A paper web formed of the amino-functionalized fibers may display unique and/or improved reactivity toward certain papermaking additives.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: August 30, 2005
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Thomas G. Shannon, David Moline
  • Patent number: 6932886
    Abstract: A fibrous web including a back liner having a higher fines side with a higher fines content, a top liner having a higher fines side with a higher fines content and at least one middle layer having a higher fines side with a higher fines content, and a lower fines side with a lower fines content, at least one middle layer and the top liner being couched together, the back liner having the higher fines side in contact with the lower fines side of at least one middle layer.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: August 23, 2005
    Assignee: Voith Paper Patent GmbH
    Inventors: Alexander Wassermann, Manfred Feichtiger
  • Patent number: 6932888
    Abstract: A flexible press cover which has an additional strengthening element in at least one of its two end regions. As a result, in the end region, the tensile strength and the tensile rigidity in the circumferential direction are increased with respect to that hitherto known in such a way that it is no longer necessary to clamp the press cover end region in between two components. Instead, the press cover according to the present invention is suitable to be fixed to the outer circumferential surface of a rotatable supporting element belonging to the cover carrying disk without the aid of an outer ring, a clamping band, clamping filament or the like. In the most beneficial case, the arrangement for fixing the press cover to the aforementioned supporting element is completely free of any kind of fixing elements which would be associated with the cover outer surface.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: August 23, 2005
    Assignee: Voith Paper Patent GmbH
    Inventors: Uwe Matuschczyk, Andreas Meschenmoser, Joachim Grabscheid, Andreas Schütte
  • Patent number: 6932887
    Abstract: A surface-treatment agent containing at least one type of processed starch selected from a) to c) as listed below is applied to a base paper of a newspaper so that a product of a B-type viscosity of the surface-treatment agent, measured under conditions of 10% concentration at 50° C. (rotor No. 1 at 60 rpm), and an application amount of the surface-treatment agent (both sides) is within a range of 2 to 15 cps·g/m2; a) Etherified starch, which is etherified by the compound defined in the general formula (1) given below: (AO)nH??(1) wherein A represents an ethylene group or propylene group, while n represents an integer of 1 to 15, b) Carboxylic acid esterified starch, which is esterified by monocarboxylic acid or dicarboxylic acid containing a linear, branched or cyclic alkyl group or alkenyl group having carbon atoms of 4 to 18, and c) Aldehyde starch.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: August 23, 2005
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Hiroshi Ono, Fuminari Nonomura, Mizuho Shimoyama, Hideki Fujiwara
  • Patent number: 6929716
    Abstract: A method for the manufacture or treatment of a material web, in particular of a paper or a cardboard web, while using a respective machine, in particular a paper machine, including the step of measuring the hardness and/or the compactness of at least one clothing, in particular of at least one felt, fabric, belt and/or the like, of the machine.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: August 16, 2005
    Assignee: Voith Paper Patent GmbH
    Inventors: Rudolf Müch, Raymond P. Shead
  • Patent number: 6926804
    Abstract: A multi-tier fabric loading harness for installing a fabric onto a papermaking machine. The loading harness has a first portion with a supporting rigid member that attaches to an end of the fabric in the cross-machine direction and a plurality of apertures spaced across its width. The first tier is formed by a rope sequentially laced through the apertures to form self-aligning loops. A second rope is sequentially laced through the loops of the first tier to form self-aligning loops for a second tier. A pull ring gathers the loops of the second tier and is used to pull the fabric onto the papermaking machine.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: August 9, 2005
    Assignee: Albany International Corp.
    Inventors: Curtis L. Gardner, Alan L. Billings
  • Patent number: 6921459
    Abstract: The present invention relates to a method for forming a non-woven fibrous web comprised of aramid fibers and aramid fibrid which comprises forming a foam furnish by agitating the fibers and fibrid in a foamed medium, and passing the foam furnish onto a screen and defoaming the furnish. In effectively agitating the aramid fibers in the foamed medium, the agitating means is mounted for displacement within the foamed medium and includes a convex leading surface facing in the direction of displacement. The leading surface includes upper and lower portions converging in the direction of displacement to form a generally convex leading surface and driving means for displacing the agitating means in the direction of displacement for dispersing and mutually separating the aramid fibers within the foamed medium.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: July 26, 2005
    Assignee: FiberMark, Inc.
    Inventors: Homan B. Kinsley, Jr., Christopher B. Peart
  • Patent number: 6918992
    Abstract: A method of making a dry defibered fluff pulp suitable for absorption products is described. In the making of fluff pulp bentonite (montmorillonite), and optionally an additional inorganic particle compound, such as a synthetic silicate compound, is added to the pulp in an amount that in the final fluff pulp yields an amount of bentonite of 0.2 to 7 kg per ton fluff pulp and optionally an amount of the additional inorganic particle compound of 0.2 to 7 kg per ton fluff pulp, the total amount of retained particle additives amounting to no more than 8 kg per ton fluff pulp. Moreover, a thus made fluff pulp for absorption products, an absorption core for absorption products comprising such dry defibered fluff pulp and optionally a superabsorbent, and an absorption product comprising such a dry defibered fluff pulp and/or an absorption core are described.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: July 19, 2005
    Assignee: Korsnas AB
    Inventors: Annica Strandberg, Stefan Hogman, Helena Tufvesson
  • Patent number: 6918995
    Abstract: The invention relates to a process for the production of paper from an aqueous suspension containing cellulosic fibers, and optional fillers, which comprises separately adding to the suspension a cationic organic polymer having one or more aromatic groups and an anionic polymer having one or more aromatic groups, the anionic polymer being selected from step-growth polymers, polysaccharides and naturally occurring aromatic polymers and modifications thereof, forming and draining the suspension on a wire, with the proviso that if the anionic polymer is a step-growth polymer it is not an anionic melamine-sulphonic acid condensation polymer.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: July 19, 2005
    Assignee: Akzo Nobel N.V.
    Inventors: Sten Frölich, Fredrik Solhage, Erik Lindgren, Hans E. Johansson-Vestin
  • Patent number: 6916402
    Abstract: Articles containing cellulose materials and treated with a chemical additive are disclosed. In accordance with the present invention, at least a portion of the cellulose containing the article is modified to include a first moiety. A chemical additive, such as softener or a humectant, is then chosen that includes a second moiety. When the chemical additive is applied to the article, the second moiety on the chemical additive forms a chemical linkage with the first moiety on the cellulose material. In this manner, the chemical additive becomes bonded to the cellulose material alleviating problems associated with retention. In one embodiment, the present invention is directed to the formation of tissue products, such as facial tissue, bath tissue and paper towels.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: July 12, 2005
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Thomas G. Shannon, Gil Bernard Didier Garnier, Alberto Ricardo Negri, Mike T. Goulet
  • Patent number: 6911115
    Abstract: Security paper (1) has a security zone (2) for providing protection against mechanical falsification. The security zone comprises a set of cells (3) indented in the paper and optionally interconnected by indented link portions, the thickness of the paper being substantially uniform throughout its area that is complementary to the cells (3) and to the link portions in the security zone (2).
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: June 28, 2005
    Assignee: Arjowiggins Security
    Inventors: Stéphane Mallol, Yvan Thierry
  • Patent number: 6911116
    Abstract: Cationically modified white pigments (W) in particulate form, essentially consisting of a particulate inorganic white pigment (M) of a particle size in the range of 0,1 to 40 ?m and an applied water soluble, cationic, crosslinked polymer (PA) containing quaternary ammonium groups in salt form, obtainable by reaction of epichlorohydrin or of epichlorohydrin derivatives or precursors with amines, under conditions leading to at least partial crosslinking, optionally in combination with an anionic optical brightener (B) and where the molar ratio of (B) to (PA) is such that the number of cationic charges of the total polymer (PA) is higher than the number of anionic charges of the total anionic optical brightener (B), are surprisingly useful as cationic white pigments in various fields of technique, especially in papermaking.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: June 28, 2005
    Assignee: Clariant Finance (BVI) Limited
    Inventors: John Martin Farrar, Andrew Clive Jackson, Alec Stewart Tindal
  • Patent number: 6908531
    Abstract: The invention relates to a method for producing a calendered paper web. According to the method, a paper web is formed from a fibrous raw material in a paper machine, and the paper web is calendered. According to the invention, a fibrous raw material is used which is at least partly made up of a chemimechanical pulp of a species of the Populus family, and the calendering is performed by online soft-calendering. By means of the invention, the gloss and smoothness of papers can be improved without decreasing their bulk.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: June 21, 2005
    Assignee: M-Real Oyj
    Inventors: Soili Hietanen, Markku Leskelä
  • Patent number: 6902651
    Abstract: The invention provides tube bank structure and a method of manufacturing a flow tube, which can improve the stabilization of the flow of stock in the tube bank of the headbox of a papermaking machine and prevent the development of turbulence and uneven concentration of stock flow by a simple and inexpensive means, resulting in speedup of papermaking process. Said flow tubes has a smaller diameter pipe portion of a circular cross-section in the inlet side, a larger diameter pipe portion connected to said smaller diameter pipe portion, a tapered pipe portion, and a rectangular pipe portion, the cross-sectional configuration of said tapered pipe portion being changed smoothly from circular to rectangular configuration.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: June 7, 2005
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Keiichi Fujiki, Tetsuo Makino, Akimine Izawa
  • Patent number: 6901775
    Abstract: A method and apparatus for providing a uniform coating thickness along an axial direction within an internal portion of a substrate tube is disclosed. A gas delivery unit is configured to coat the internal portion of the substrate tube. The gas delivery unit includes an insert. At least one of an inner diameter of the insert, a length of the insert, a gap between the insert and the substrate tube, and a flow of the gas mixture delivered to the substrate tube is configured to provide the uniform coating thickness along the axial direction.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: June 7, 2005
    Assignee: Corning Incorporated
    Inventors: Jean-Philippe J. de Sandro, Keith L. House, Joohyun Koh, Prantik Mazumder
  • Patent number: 6899794
    Abstract: A liquefied paper material is used as raw materials. A paper frame member 1 supporting a vibrating plate is paper-skimmed and formed. On paper-skimming and forming, a central hole for use in voice coils, air-release hole 1a releasing air pressure in a rear of the vibrating plate to outside due to vibration of the vibrating plate. A loudspeaker system is manufactured using the paper frame member 1.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: May 31, 2005
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Morito Co., Ltd., Fuji Cone Seisakusho Co., Ltd., Foster Electric Co., Ltd.
    Inventors: Teruho Yamada, Masahiko Kawahara, Yukio Sugimoto, Seiji Mori, Toshikazu Iwasaki
  • Patent number: 6896769
    Abstract: Modified condensation polymers containing azetidinium groups, such as polyamide epichlorohydrin (PAE) resins, can be combined with amphiphilic hydrocarbons containing polyethers into a single molecule to provide several potential benefits, depending upon the specific combination employed, including: (a) wet strength aids that impart softness; (b) softeners that do not reduce wet strength: (c) wet strength with improved wet/dry strength ratio; (d) surface feel modifiers with reduced linting and sloughing; (e) wet strength aids with controlled absorbency; (f) wet strength aids with controlled decay rate after wetting; and (g) Yankee dryer additives that provide surface protection and adhesion with controlled release properties.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: May 24, 2005
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Thomas Gerard Shannon, Mike Thomas Goulet, Daniel Arthur Clarahan, Wen Zyo Schroeder
  • Patent number: 6893537
    Abstract: A tissue product that has a relatively low level of lint and slough is provided. For example, the tissue product contains a flexible binder copolymer that is at least formed from an ethylenically unsaturated monomeric constituent and an unsaturated polysiloxane monomeric constituent. In one particular embodiment, the unsaturated polysiloxane monomeric constituent includes at least one unsaturated polysiloxane monomer having the following formula: wherein, R1 is an ethylenically unsaturated group that has free radical polymerizability; R2, R3, R4, R5, R6, R7, and R8 are the same or different and can be selected from the group consisting of hydrogen, an aryl group, an alkyl group, a substituted alkyl or aryl group, an ethoxy group, and a propoxy group; m is an integer from 4 to 15,000; and n is an integer from 0 to 15,000.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: May 17, 2005
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Thomas G. Shannon, David A. Moline, Jim D. Lorenz, Lisa A. Flugge