Inorganic Additive Patents (Class 162/128)
  • Patent number: 9799215
    Abstract: A method of operating an acoustic system includes detecting an ultrasonic sound signal and pattern matching the received ultrasonic sound signal to determine when the received ultrasonic sound signal is a desired ultrasonic sound signal. The method includes sending a signal to at least one electronic component when the received ultrasonic sound signal is the desired ultrasonic sound signal. The method includes operating the microphone in a lower power state when the received ultrasonic sound signal is not the desired ultrasonic sound signal.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: October 24, 2017
    Assignee: Knowles Electronics, LLC
    Inventors: Sarmad Qutub, Oddy Khamharn, Dibyendu Nandy, Martin Volk, Robert Popper
  • Patent number: 8608905
    Abstract: This invention concerns the production of a multilayer fiber product. According to the method, on top of a bottom layer consisting of at least one fiber layer, a second fiber layer is fitted containing filler that forms the surface layer. According to the invention, the layers are formed by multilayer web forming technology, and the surface layer filler includes cellulose or lignocellulose fibrils, on which light-scattering material particles are deposited, having a maximum proportion of the total filler weight of 85%. By means of the invention, a base paper is achieved that is suited to thin, coated paper grades, where conventionally the intrusion of the coating color into the bottom paper and through it is a problem.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: December 17, 2013
    Inventors: Markku Leskela, Jari Meuronen, Petri Silenius, Sami Haapala
  • Patent number: 8284964
    Abstract: A compound membrane (100) for an acoustic device (200), the compound membrane (100) comprising a first layer (101) and a second layer (102), wherein a value of Young's modulus of the second layer (102) does not vary more than essentially 30% in a temperature range between essentially ?20° C. and essentially +85° C.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: October 9, 2012
    Assignee: Knowles Electronics Asia PTE. Ltd.
    Inventors: Susanne Windischberger, Josef Lutz, Ewald Frasl
  • Patent number: 7998592
    Abstract: A recording paper used for an electrophotographic system is provided, wherein, in a gas chromatograph generated using a headspace method by holding two pieces of the paper of dimensions about 1 cm×about 1 cm at about 120° C. for about 3 minutes, the quantity of aldehyde compounds generated having a straight-chain alkyl chain of about 5 to about 20 carbon atoms is equivalent to a peak surface area ratio of no more than about 65% and a peak surface area of no more than about 40,000.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: August 16, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Chizuru Koga, Tsukasa Matsuda, Toshiyuki Kasahara, Kouzou Ohta
  • Publication number: 20110186252
    Abstract: In an engineered composite product containing cellulose fibres, cellulosic fibrillar fines and pigment, the main component of the composite product is pigment with a percentage of 40-80% by weight, the percentage of cellulosic fibrillar fines is 15-40% by weight, and the percentage of cellulose fibres is 5-30% by weight. Method of making the engineered composite product comprises the steps of combining said components in an aqueous solution and preparing the composite product by de-watering the aqueous solution. The components are combined in the aqueous solution in such proportion that the percentage of pigment in the final composite product is 40-80% by weight, the percentage of cellulosic fibrillar fines is 15-40% by weight, and the percentage of cellulose fibres is 5-30% by weight.
    Type: Application
    Filed: August 3, 2009
    Publication date: August 4, 2011
    Applicant: UPM-KYMMENE CORPORATION
    Inventors: Ramjee Subramanian, Hannu Paulapuro
  • Publication number: 20110126957
    Abstract: A flexible or rigid multilayer material for fire protection applications. The multilayer fire protection material includes an inorganic fibrous layer and an endothermic layer. The layers of the fire protection material are bonded together to form a single sheet material without the use of auxiliary bonding means.
    Type: Application
    Filed: November 12, 2010
    Publication date: June 2, 2011
    Inventors: Michele WIERZBICKI, Kenneth B. Miller, Joseph A. Fernando
  • Patent number: 7851021
    Abstract: A method of delivering and retaining zinc borate within a wet process hardboard is disclosed wherein process parameters are controlled and the borate is included in the overlay slush process of wet board processing.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: December 14, 2010
    Assignee: Louisiana-Pacific Corporation
    Inventors: John M. Joyce, Clemente R. Diaz, Simon Fitzgerald
  • Patent number: 7399379
    Abstract: The present invention relates to a sheet structure for electrical insulation or flame resistance comprising a barrier ply having a mica-rich face and a mica-poor face and a reinforcing ply containing a saturable backing layer attached to the mica-poor face of the barrier ply.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: July 15, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Mikhail R. Levit, Laurence N. Bascom
  • Patent number: 7377995
    Abstract: Single-ply throughdried tissue sheets, particularly suitable as bath tissue, are produced with at least three layers. One or both of the outer layers suitably contain predominantly softwood fibers and a chemical bonding agent. One or more of the inner layers suitably contains a chemical debonder. The resulting tissues have a high level of durability and softness.
    Type: Grant
    Filed: May 12, 2004
    Date of Patent: May 27, 2008
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Patrick Pachih Chen, Michael Alan Hermans, Pau-Lin Pawar, Thomas Gerard Shannon
  • Patent number: 7291246
    Abstract: The invention relates to liquid board comprising one or more layers of material containing cellulose, one or more of said layers comprising an additive that has the capacity to react with or decompose a disinfectant with which said liquid board is treated, so that a gas is formed that acts as a barrier and thereby prevents the penetration, especially edge penetration, of said disinfectant into the paperboard layer/layers.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: November 6, 2007
    Assignee: Stora Enso Aktiebolag
    Inventors: Klas Norborg, Mikael Hjerpe, Kajsa von Schalien
  • Patent number: 7005035
    Abstract: A packaging device and method for absorbing and reducing moisture as well as a manufacturing process for such device. The packaging device is a container made from paperboard such as containerboards or linerboards with a corrugated medium. The paperboard is insulated with moisture absorbing additives comprising charcoal, activated charcoal, activated carbon, or substances mostly comprised of carbon. Perforations may be added in the boards to further permit moisture to reach the corrugated medium, permitting further absorption by the additives embedded within the corrugated medium in between the boards. This packaging device and method is favorable for storing or transporting objects which are sensitive to or would benefit from low moisture/humidity conditions.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: February 28, 2006
    Inventors: Kevin J. O'Neill, Albert J. Salese
  • Patent number: 6712931
    Abstract: A method for manufacturing a paper or board web in which stock is fed from a headbox (100) to a wire section (200), in which water is removed from the web (W) and from which the web (W) is passed to a press section (300), in which water is pressed out of the web (W) and after which the web (W) is dried in a dryer section (400) and reeled by means of a reel-up (800). According to the invention, additives, fillers and/or fines are fed into the stock of the surface layers of the web (W) in order to reduce the pore size distribution of the web in the surface layers so as to substantially correspond to a precoated web. The invention also relates to a paper or board machine which is characterized in that it is structured for enabling the feeding of additives, fillers and/or fines into a fiber stock such that an uncoated web substantially corresponds in its properties to a precoated web.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: March 30, 2004
    Assignee: Metso Paper, Inc.
    Inventors: Johan Grön, Pasi Ahonen, Juha Kinnunen, Pentti Rautiainen, Mari Taipale
  • Patent number: 6702922
    Abstract: A process for forming an abrasion resistant, decorative sheet which comprises forming a web of cellulosic fibers on a papermaking machine and applying a coating suspension including an abrasion-resistant grit and decorative inclusion particles to the upper surface of the web on the papermaking machine.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: March 9, 2004
    Assignee: MW Custom Papers, LLC
    Inventors: Eric Wagner, Dennis Hankey
  • Publication number: 20030226648
    Abstract: A multiple-ply paperboard material having improved oil and grease resistance properties, and improved stain masking properties to minimize the appearance of oil and grease stains in the paperboard material, and a method for forming same. The multiple-ply paperboard includes a substantially paperboard substrate having at least two plies, including at least a top ply and a bottom ply formed of substantially paperboard material, a grease resistant coating, a pigment-based pre-coating and a pigment-based top coating. The grease resistant coating includes a fluorochemical component applied to the outer surface of the top ply and to the outer surface of the bottom ply to hinder the penetration and migration of grease and oil into said substantially paperboard substrate through both the top ply and the bottom ply. The pigment-based pre-coating is applied to the top ply over the grease resistant coating, while the top coating is applied over the pre-coating.
    Type: Application
    Filed: June 6, 2002
    Publication date: December 11, 2003
    Inventors: William T. McDonnell, Mary Ellen McKillip
  • Patent number: 6627042
    Abstract: In a process and a device for the formation of a multi-ply and/or multi-layer fiber material web, in particular of a paper or cardboard web, at least one of the two external plies and/or layers of the fiber material web is formed using fiber material, on whose wetted fiber surfaces, at least one additive has been at least partially deposited.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: September 30, 2003
    Assignee: Voith Paper Patent GmbH
    Inventor: Herbert Holik
  • Publication number: 20030141026
    Abstract: The invention relates to liquid board comprising one or more layers of material containing cellulose, one or more of said layers comprising an additive that has the capacity to react with or decompose a disinfectant with which said liquid board is treated, so that a gas is formed that acts as a barrier and thereby prevents the penetration, especially edge penetration, of said disinfectant into the paperboard layer/layers.
    Type: Application
    Filed: December 23, 2002
    Publication date: July 31, 2003
    Inventors: Klas Norborg, Mikael Hjerpe, Kajsa van Schalien
  • Publication number: 20030094252
    Abstract: Cellulosic products comprising cellulosic fibers and precipitated calcium carbonate prepared in-situ during papermaking are described. The precipitated calcium carbonate is deposited on the cellulosic fibers and is present in a variety of sizes, shapes and morphologies, and is present in the cellulosic products on all physical features of the cellulosic fibers. At least a portion of the precipitated calcium carbonate is present with the fiber based on interaction with one or more chemicals used in papermaking.
    Type: Application
    Filed: October 17, 2001
    Publication date: May 22, 2003
    Applicant: American Air Liquide, Inc.
    Inventors: Meenakshi V. Sundar, Steven A. Fisher
  • Patent number: 6551455
    Abstract: A process for forming an abrasion resistant, printable sheet which comprises forming a web of cellulosic fibers on a papermaking machine and applying a slurry including an abrasion-resistant grit to the upper surface of the web on the papermaking machine and then applying a secondary web of cellulosic fibers over the grit to form a three layer overlay product.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: April 22, 2003
    Assignee: The Mead Corporation
    Inventors: Mark A. Johnson, John Benson, Mahendra Mehta, Steve Canary, Eric Girardin
  • Publication number: 20030021952
    Abstract: A multi-layer article comprised of a first and second layers bonded together. The first layer is comprised of two plies and a third material between the two plies. The two plies are bonded together at a plurality of discrete bond sites. The bonding of the plies form an interior region between the plies.
    Type: Application
    Filed: July 10, 2002
    Publication date: January 30, 2003
    Inventors: Ronald Joseph Zink, Michael Bernard Dugas
  • Publication number: 20020121352
    Abstract: Methods and devices are provided for treating a fluid with a high voltage electric field for decontaminating the fluid or a variety of other purposes. In a preferred embodiment for decontamination, the method includes (a) applying an electric field across a fluid having contaminants dispersed therein; and then (b) flowing the fluid through a decontamination cell to separate from the fluid at least a portion of the contaminants. An apparatus for use with this method preferably includes an electropotential cell comprising a housing containing an anode and a cathode for applying an electric field to a fluid flowing through the housing, a decontamination cell in fluid communication with the electropotential cell for separating from the fluid at least a portion of any contaminants dispersed therein, and an optional means for introducing gas bubbles into the fluid before the fluid flows to the electropotential cell.
    Type: Application
    Filed: March 4, 2002
    Publication date: September 5, 2002
    Inventors: J. Alan Lawson, Ahmed A. BaOsman, Jeffrey S. Hsieh
  • Patent number: 6440266
    Abstract: A non-woven web of fibrous material containing a reactive particulate material is made using the wet laid, or preferably foam, process. First and second fibrous webs are made using the wet laid or foam process, and a liquid or foam slurry including reactive particulate material is provided between the webs so as to provide a composite web. Liquid, or foam and liquid, are withdrawn from the composite web and then the composite web is dried so as to produce a final non-woven web with reactive material having substantially optimum reactivity (that is the reactive material loses a minimum amount reactivity during the web production process). The webs and slurry may be made using substantially pure water, and the particulate part of the reactive material is mixed with the foam or liquid slurry no more than about ten seconds before the liquid and/or foam are withdrawn from the composite web.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: August 27, 2002
    Assignee: Ahlstrom Paper Group Research and Competence Center
    Inventors: Jonathan George, Andrea Grosso, Raimo Piittala, Kay Rokman, Kaj Back
  • Patent number: 6423181
    Abstract: A gravure paper and a method of manufacturing gravure paper having a maximal roughness depth of approximately 1.40 &mgr;m. The method utilizes a paper machine including a forming system, a first press section, and a drying section, and includes producing a stock suspension including a stock having a freeness of greater than or equal to approximately 50 ml CSF, forming an unfinished fibrous material web from the stock suspension, and applying at least one of a pigment and a filler slurry to the unfinished fibrous material web between a beginning of the forming system and a position at which the dry matter content of the unfinished fibrous material web is approximately ≦90%.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: July 23, 2002
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventors: Benjamin Mendez-Gallon, Klaus Prechtel, Wolfram Sturm, Johann Moser, Volker Schmidt-Rohr, Ingolf Cedra
  • Patent number: 6419790
    Abstract: The present invention is a method of making an ultra soft, multi-ply tissue using wet press technology and the product produced thereby.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: July 16, 2002
    Assignee: Fort James Corporation
    Inventors: Joseph C. Leege, Ranga Ramesh
  • Publication number: 20020069988
    Abstract: The present invention relates to a composite material including a substrate with a first and a second layer, and a surfactant. The surfactant is applied to the first layer of the substrate. The surfactant acts to lower the surface tension of a fluid which contacts the first layer of the substrate such that the fluid is allowed or more readily enabled to pass through the first layer of the substrate, but such that the surfactant does not substantially adversely effect the absorption capacity or wicking height of the second layer of the substrate, as the second layer of the substrate substantially inactivates the surfactant upon contact or interaction therewith.
    Type: Application
    Filed: August 31, 2001
    Publication date: June 13, 2002
    Inventors: Ali Yahiaoui, Bernard Cohen, Joel Brostin, Michael Tod Morman
  • Patent number: 6328850
    Abstract: A multi-layered paper product. The paper product has individual layers for providing a soft tactile sensation to the user, for providing strength, and for providing bulk. Suitable fibers for increasing bulk may be synthetic fibers, debonded fibers, weakly bonded fibers, curled fibers, and fibers combined with particulate fillers. An exemplary embodiment having five layers is disclosed.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: December 11, 2001
    Assignee: The Procter & Gamble Company
    Inventors: Dean Van Phan, Paul Dennis Trokhan
  • Publication number: 20010045265
    Abstract: In a process and a device for the formation of a multi-ply and/or multi-layer fiber material web, in particular of a paper or cardboard web, at least one of the two external plies and/or layers of the fiber material web is formed using fiber material, on whose wetted fiber surfaces, at least one additive has been at least partially deposited.
    Type: Application
    Filed: May 3, 2001
    Publication date: November 29, 2001
    Inventor: Herbert Holik
  • Patent number: 6270624
    Abstract: A stock feed system for a multi-layer headbox and a method in the operation of a multi-layer headbox in which into each inlet header of the multi-layer headbox, a stock concept is passed which has been produced out of the same fresh stock by adding the necessary chemicals and fillers to separated portions of the fresh stock.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: August 7, 2001
    Assignee: Valmet Paper Machinery Inc.
    Inventors: Jyrki Huovila, Erkki Ilmoniemi, Michael Odell, Antti Suonperä
  • Patent number: 6251223
    Abstract: A process for improving gravure and offset printability of coated and uncoated printing papers by increasing filler share in the paper on the top and bottom sides or in the outer layers of the paper web by using a retention agent, and providing the outerlayers of the fiber bearing liquid forming the paper web with additional retention agent before or during sheet formation on or between the wires of the paper making machine.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: June 26, 2001
    Assignee: Stora Publication Paper AG
    Inventors: Hansjörg Kessler, Dieter Horand, Wolfram Friesen
  • Patent number: 5830317
    Abstract: Soft, strong, and low dusting tissue paper webs useful in the manufacture of soft, absorbent sanitary products such as bath tissue, facial tissue, and absorbent towels are disclosed. The tissue papers comprise fibers such as wood pulp and a non-cellulosic, water insoluble particulate filler such as kaolin clay and possess biased surface properties.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: November 3, 1998
    Assignee: The Procter & Gamble Company
    Inventors: Kenneth Douglas Vinson, Jonathan Andrew Ficke, Bart Steven Hersko
  • Patent number: 5814188
    Abstract: Strong, soft, and low dusting tissue paper webs useful in the manufacture of soft, absorbent sanitary products such as bath tissue, facial tissue, and absorbent towels are disclosed. At least one surface of the tissue papers has uniform discrete surface deposits of a substantively affixed chemical softening agent.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: September 29, 1998
    Assignee: The Procter & Gamble Company
    Inventors: Kenneth Douglas Vinson, Paul Thomas Weisman, Jonathan Andrew Ficke, Thomas James Klofta
  • Patent number: 5766386
    Abstract: A metal clad laminate which is thin and flat and has high resistivity to metal migration and excellent drilling processability is produced by bonding at least two layers of resin sheets and a metal foil layered on at least one side of the layered resin sheets with heat and pressure, each of the resin sheets comprising inorganic fibers, solid particles of a thermosetting resin and a cured binder resin bonding the inorganic fibers and the solid particles of the thermosetting resin together.
    Type: Grant
    Filed: September 6, 1996
    Date of Patent: June 16, 1998
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Hiroshi Sakai, Yoshihiro Nakamura, Hikari Murai, Toshiyuki Iijima
  • Patent number: 5759346
    Abstract: A method for producing uncreped, strong, soft, and low dusting tissue paper webs useful in the manufacture of soft, absorbent sanitary products such as bath tissue, facial tissue, and absorbent towels is disclosed. The tissue papers comprise fibers such as wood pulp and a non-cellulosic, water insoluble particulate filler such as kaolin clay.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: June 2, 1998
    Assignee: The Procter & Gamble Company
    Inventor: Kenneth Douglas Vinson
  • Patent number: 5700352
    Abstract: A process for incorporating a fine particulate filler such as kaolin clay into tissue paper is disclosed. The process results in strong, soft, and low dusting tissue paper webs useful in the manufacture of soft, absorbent sanitary products such as bath tissue, facial tissue, and absorbent towels.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: December 23, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Kenneth Douglas Vinson, Howard Thomas Deason
  • Patent number: 5681428
    Abstract: An inorganic board consisting of a cured base mat and a cured surface mat is manufactured by forming a surface mat by the dry method on a base mat formed by a paper making method, embossing the composite mat, and curing the embossed composite mat. Ridges each having an enlarged top are formed on the surface of the base mat when a plural number of single mats formed by the paper making method are rolled and laminated around a making roll having a surface on which a plural number of ring grooves are formed. The ridges of the base mat engage the surface mat since each ridge has an enlarged top to improve the interlaminate strength between a cured base mat and a cured surface mat of the resulting inorganic board.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: October 28, 1997
    Assignee: Nichiha Corporation
    Inventors: Shiro Nakajima, Masaki Kanai
  • Patent number: 5672249
    Abstract: A process for incorporating a fine particulate filler such as kaolin clay into tissue paper is disclosed. The process results in strong, soft, and low dusting tissue paper webs useful in the manufacture of soft, absorbent sanitary products such as bath tissue, facial tissue, and absorbent towels.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: September 30, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Kenneth Douglas Vinson, John Paul Erspamer, Charles William Neal, Jonathan Andrew Ficke, Jeffress Paul Halter
  • Patent number: 5643413
    Abstract: A method of producing a multi-ply paperboard product. A single aqueous recycled pulp stock which contains both heavy contaminants and lightweight contaminants is separated into three fractions, including a first fraction which contains the heavy contaminants, a second middle density fraction that contains the most desirable fibers, and a third low density fraction that contains the lightweight contaminants. The three fractions are discharged from a multi-channel head box onto a forming fabric, with the middle density fraction constituting the base ply in contact with the forming fabric, the low density fraction being the central ply and the high density fraction being the outer ply, thus forming a multiple-ply paperboard product.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: July 1, 1997
    Assignee: Hoffman Environmental Systems, Inc.
    Inventor: Roger P. Hoffman
  • Patent number: 5389202
    Abstract: A high pulp content nonwoven composite fabric is disclosed. The composite fabric contains more than about 70 percent, by weight, pulp fibers which are hydraulically entangled into a continuous filament substrate. This high pulp content composite nonwoven fabric may be used as a heavy duty wiper or as a fluid distribution material, cover material, and/or absorbent material in an absorbent personal care product. Also disclosed is a method of making the high pulp content nonwoven composite fabric.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: February 14, 1995
    Assignee: Kimberly-Clark Corporation
    Inventors: Cherie H. Everhart, Daniel O. Fischer, Fred R. Radwanski, Henry Skoog
  • Patent number: 5324079
    Abstract: A security element that can be embedded in the form of a thread or strip in a security document, in particular a paper of value, is composed of two carrier sheets, each of which bears each of the marking substances allowing for detection of authenticity. The two carrier sheets are put together in such a way that the marking substances to be protected from mechanical abrasion and other external influences come to lie on the inside.The thread not only offers special protection for the marking substances, but can also be embedded in the paper substance easily due to its symmetrical structure and without showing any tendency to curl.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: June 28, 1994
    Assignee: GAO Gesellschaft fur Automation und Organisation mbH
    Inventors: Wittich Kaule, Wilhelm Ilgmann, Gerhard Schwenk, Gerhard Stenzel
  • Patent number: 5176794
    Abstract: One or more layers of a sheet comprising (1) 60% to 99%, based on the weight of solids, of vermiculite delaminated by mechanical means only, (2) 1% to 40%, based on the weight of solids, of at least one fibrous material and (3) 0.1% to 4%, based on the weight of the vermiculite, of at least one flocculating agent, can be used to protect heat-sensitive substrates such as resin matrix composites from fire or heat.
    Type: Grant
    Filed: May 7, 1991
    Date of Patent: January 5, 1993
    Assignee: Hercules Incorporated
    Inventors: Herbert T. Conner, David H. Dumas, Lawrence L. Nelson
  • Patent number: 5061345
    Abstract: A method of producing multi-ply paper product, such as linerboard. A pulp stock of reclaimed, white office waste paper which contains fillers, such as clay and calcium carbonate, toners and ink is applied as a top ply to a base ply of Kraft pulp stock. Both pulp stocks have a pH in the range of 6.0 to 8.0. A dry strength additive, such as cooked starch, is incorporated in the plies and serves to improve the internal strength of the top ply, as well as improving the bond between the plies.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: October 29, 1991
    Assignee: Green Bay Packaging Inc.
    Inventor: Roger P. Hoffman
  • Patent number: 5055161
    Abstract: A multi-ply paper product, such as linerboard, composed of a base ply of Kraft pulp and a top ply of reclaimed, white office waste paper which contains fillers, such as clay and calcium carbonate, toners and ink. A dry strength additive, such as cooked starch, is incorporated in the plies and serves to improve the internal strength of the top ply, as well as improving the bond between the plies.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: October 8, 1991
    Assignee: Green Bay Packaging Inc.
    Inventor: Roger P. Hoffman
  • Patent number: 5039378
    Abstract: A packing paper comprising a support layer and a coating layer. The coating layer contains minerals, which give it a white pigmentation, has a content of between 25 and 50% by weight of dry materials, has a good degree of whiteness which is at least equal to 70, and has good capacity for flexographic printing.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: August 13, 1991
    Assignee: La Cellulose du Pin
    Inventors: Jean-Claude Pommier, Joel Poustis
  • Patent number: 4935290
    Abstract: This heat-superstabilized semi-finished product containing thermoplastic resin is constituted of at least two layers: at least one surface layer S designed to be exposed to a source of heat and at least one other layer C which is not directly exposed to said source of heat, said layer S having an overall content by weight of stabilizer which is between 3 and 30 times greater than that of layer C, and said layer S having a surface density between 50 and 600 g.m..sup.-2.
    Type: Grant
    Filed: August 18, 1987
    Date of Patent: June 19, 1990
    Inventors: Hubert de Rancourt, Xavier Gambert
  • Patent number: 4909901
    Abstract: The present invention provides a multilayer fibrous material suitable for use as an EMI and RFI shielding packaging material and a process for producing the same comprising first and second outer layers formed of paper or paperboard and an inner layer formed of paper or paperboard containing conductive carbon. The invention also provides a method of providing antistatic properties to the packaging material.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: March 20, 1990
    Assignee: James River Corporation
    Inventors: Richard G. McAllister, Lawrence E. McEnroe, III
  • Patent number: 4853085
    Abstract: A paper particularly adapted for use as cover sheets in the production of gypsum wallboard, the paper having improved porosity and strength to permit better drainage and more rapid drying in the production of the paper to permit less fiber to be utilized, and to permit less heat to be utilized in drying the paper, providing for production of superior gypsum board. The paper comprises in weight percent:(A) fibers having a fiber freeness of from about 350 to 550 ml. Canadian Standard Freeness,(B) a buffering agent in an amount from about 0.25 to about 10%,(C) a neutral sizing agent in an effective amount to prevent water penetration, and(D) a cationic starch.In a preferred embodiment the paper is treated with a neutral internal sizing agent during its formation, and subsequently treated with a surface sizing agent after formation of the paper, in order to provide certain properties including better adhesion to the gypsum core.
    Type: Grant
    Filed: November 15, 1982
    Date of Patent: August 1, 1989
    Assignee: United States Gypsum Company
    Inventors: Norman E. Johnstone, John R. Kehoe
  • Patent number: 4818340
    Abstract: The present invention resides in an envelope type separator for a storage battery and the manufacturing process thereof. The separator sheet is comprised of a first, microporous paper layer made of an inorganic powder material, a synthetic organic fiber material and an organic binder, and a second, coarse paper layer made of a synthetic organic fiber material and an organic binder, but no inorganic powder material, these layers being bound together by heating. The resultant separator sheet of combination paper type is then formed so that the mutually inward surfaces of the coarse paper layer are brought into contact with each other and are made to adhere to each other, preferably at the edges, by thermal fusion, so that the separator sheet is formed into the shape of an envelope process for making an envelope type separator sheet is also described.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: April 4, 1989
    Assignee: Nihon Muki Kabushiki Kaisha
    Inventors: Takao Hasegawa, Hideo Endo
  • Patent number: 4734336
    Abstract: A twin ply uncoated paper for ink jet processes comprised of a supporting paper substrate sheet as a first ply, and thereover as a second ply a paper sheet with filler additives attached to the fibers thereof, which additives are, for example, selected from the group consisting of amorphous synthetic silicas, inorganic silicates, metal alumino-silicates, and inorganic oxides. Three ply papers are also illustrated wherein there is situated between two second plies a supporting substrate sheet.
    Type: Grant
    Filed: October 2, 1986
    Date of Patent: March 29, 1988
    Assignee: Xerox Corporation
    Inventors: John F. Oliver, Arthur Y. Jones
  • Patent number: 4606790
    Abstract: A multi-ply, fibrous material-based, conductive structure, and a method of making such a structure, which comprises as an integral structural member thereof at least one ply having an integral, continuous, uninterrupted, electroconductive barrier capable of intercepting and dissipating any electrostatic charges or discharges coming into contact with the structure. The ply provided with the electroconductive barrier can, during manufacture, be preselectively positioned with relation to the other, non-conductive plies comprising the structure to meet the specific performance demands of a user of the structure.
    Type: Grant
    Filed: July 6, 1984
    Date of Patent: August 19, 1986
    Assignee: Container Corporation of America
    Inventors: Roger W. Youngs, Robert W. Lewis, Robert N. Kussman, John R. Hurtt
  • Patent number: 4548676
    Abstract: A composite paper particularly adapted for use as cover sheets in the production of gypsum wallboard, the paper being sufficiently porous to permit better drainage and more rapid drying in the production of the paper, and when applied to the surfaces of a gypsum slurry for forming wallboard, permits less heat to be utilized in the wallboard conversion, thereby saving energy in the board production required for drying the board. The paper comprises in weight percent:(A) cellulosic fibers in an amount of from about 65% to about 90% and preferably having a fiber freeness of from about 300 ml to about 550 ml Canadian Standard Freeness,(B) calcium sulfate as a filler in an amount of from about 10% to about 35%,(C) a binder in an amount from about 1% to about 31/2%,(D) a flocculant in an amount of from about 0.1% to about 0.2%,(E) a buffering agent in an amount from about 0.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: October 22, 1985
    Assignee: United States Gypsum Company
    Inventors: Norman E. Johnstone, John R. Kehoe
  • Patent number: 4541894
    Abstract: Essentially isotropic metallizable polymeric substrates having very low coefficients of thermal expansion are well adopted for printed circuits, are facilely prepared by papermaking technique and hot pressing, and are comprised of a fibrous polymer matrix, advantageously an aramide non-woven batt, bonded together with a cured imido prepolymer, and include particulate filler material, advantageously electrically insulating metal oxide particles, distributed therethrough.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: September 17, 1985
    Assignee: Rhone-Poulenc SA
    Inventor: Robert Cassat