Patents Examined by Steven B. Leavitt
  • Patent number: 5904809
    Abstract: In a foam laid process for producing a non-woven web of fibrous material (such as of synthetic or cellulose fibers) substantially fiber free foam is introduced at various locations in or adjacent to a headbox to get improved results. By introducing pure foam into the foam-fiber mixture near (e.g. just before) where the foam-fiber mixture is introduced into the headbox a more uniform basis weight profile of the non-woven web produced may be provided (e.g. a basis weight variation of about 0.5% or less). By introducing another stream of substantially fiber free foam into the headbox at a surface remote from the foraminous element, to flow along the surface (typically parallel to the flow of the foam fiber mixture), it is possible to minimize shear of fibers in the headbox so that the fibers do not become unidirectional, in the direction of movement of the foraminous element, and keep the surface clean. The surface is typically a roof surface of an inclined headbox.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: May 18, 1999
    Assignee: Ahlstrom Paper Group Oy
    Inventors: Kay Rokman, Juhani Jansson
  • Patent number: 5901710
    Abstract: A cigar enhancing humidor is airtight and nonporous and has a flavor additive chamber which is controllable to release moisture and flavoring into the humidor which are absorbed by the cigars to enhance their flavor.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: May 11, 1999
    Inventor: Michael Barber
  • Patent number: 5900113
    Abstract: The present invention provides a method of monitoring a papermaking system and unit operations contained therein to optimize the overall papermaking process. The method comprises employing a fluorescent tracer that is selectively carried through the entire papermaking system or in a specific unit operation and is sufficiently inert and sufficiently stable under the environmental and chemical conditions of the system from its addition point to the sampling point. A sample is withdrawn from the papermaking environment (either via `grab` or on-line side stream sampling) and the withdrawn sample subjected to analysis. The analysis comprises comparing the tracer concentration to a standard to determine the concentration of tracer in the sample and/or determining the time of first appearance of said tracer from addition point to the sampling point and/or subsequent decay of said tracer concentration at the sampling point.
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: May 4, 1999
    Assignee: Nalco Chemical Company
    Inventor: Karen R. Tubergen
  • Patent number: 5891306
    Abstract: A system and method of producing a paper product from a wetstock solution using a sensor for sensing resistive impedance changes of the wetstock on the support web of the system. The resistive impedance changes are used to measure physical characteristics such as water weight of the wetstock on the support web of a sheetmaking system. The system includes a fixed impedance element coupled in series with a sensor portion between an input signal and ground. The sensor portion is an electrode configuration which includes at least two electrodes with a portion of the wetstock residing between and in close proximity to the electrodes. The sensor exhibits a variable impedance resulting from changes in the physical characteristics of the wetstock.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: April 6, 1999
    Assignee: Measurex Corporation
    Inventors: Lee Chase, John Goss, Graham V. Walford
  • Patent number: 5891309
    Abstract: A web support foil positioned adjacent to a Yankee dryer above a creping doctor. The foil supports the web as it leaves the dryer. Mounted to the top of the foil is an adjustable air deflector which is positioned tangent to the Yankee dryer. The air deflector blocks air moving along the web. A slotted opening draws air from a leading-edge pocket collecting fibers which are broken loose during the creping action. The web is held against the bottom side of the foil by one or more air jets which are directed over the bottom surface on the foil. The jets of air function as coanda air jets and prevent the web from sticking to the bottom surface of the foil while creating a Bernoulli effect which holds the web against the bottom of the foil.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: April 6, 1999
    Assignee: Beloit Technologies, Inc.
    Inventors: Robert E. Page, Gerald J. Kramer, Dale A. Brown, David A. Smith
  • Patent number: 5888367
    Abstract: The present invention provides a record sheet used in an electro-coagulation printing method for forming characters and images on a cylinder as an electrode with an ink which coagulates with electric charge and for transferring the characters and images to the record sheet, wherein the wet time is 15 milliseconds or less, obtained from the absorption curve of pure water measured by a dynamic scanning absorptometer. Preferably, the record sheet has 5 ml/m.sup.2 s.sup.-1/2 or more absorption coefficient, and more preferably, has contact ratio measured by a specular reflection smoothness tester under a pressure of 40 kg/cm.sup.2 with a ray having a wavelength of 0.5 .mu.m is 40% or more. The record sheet can be used for various print sheets, in particular, for business form sheets and newspaper sheets.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: March 30, 1999
    Assignee: Tokushu Paper Mfg. Co., Ltd.
    Inventors: Toyohisa Mouri, Toshio Takagi, Shigeki Matsunaga, Yutaka Hattori
  • Patent number: 5887596
    Abstract: A vehicle ashtray has a housing fastenable to a vehicle, an ashtray drawer movable under the action of a spring force from a close basic position to an open end position, and a stop member arranged so that said ashtray drawer remains in a half-open position and is movable to said open end position only after overcoming a resistance.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: March 30, 1999
    Assignee: fischerwerke, Artur Fischer GmbH & Co. KG.
    Inventors: Christiane Ziegler, Roland Dettling, Bernd Schenk, Ulrich Nienhaus
  • Patent number: 5885419
    Abstract: Methods for inhibiting the deposition of organic contaminants from pulp in pulp and papermaking systems are disclosed. Albumins, globulins or blends thereof and spray-dried animal blood cells are added to the pulp or sprayed onto deposition prone surfaces of a papermaking system suffering from organic contaminants.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: March 23, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Duy T. Nguyen, Tien-Feng Ling
  • Patent number: 5879514
    Abstract: A scraper device for a paper machine comprises first and second scraper means that can be pivoted into engagement with a fabric web and with a guide roll, respectively. By combining at least two scraper means in a common assembly, a particularly compact and cost-saving structure is achieved. Due to the fact that the first scraper means is arranged upstream of the guide roll, viewed in the direction of travel of the fabric web, and that it can be pivoted into engagement with the fabric web from below in a manner such that a downwardly open space is left, it is guaranteed that the paper residues will be carried off completely even in case of trouble, for example in case of web failure.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: March 9, 1999
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventor: Andreas Meschenmoser
  • Patent number: 5876566
    Abstract: A composite is provided for forming a sealing strip for use in a suction roll of a papermaking machine that has extended usability and wear. The composite is a blend of a nitrile rubber, graphite, carbon black, and polytetrafluoroethylene, optionally with a phenolic resin. The sealing strip has polytetrafluoroethylene evenly distributed over the contact surface and when installed into a suction roll provides a reduced frictional surface.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: March 2, 1999
    Assignee: Appleton Specialty Products, Inc.
    Inventor: Thomas Edward Frawley, Jr.
  • Patent number: 5875785
    Abstract: A pipe tool and method of filling. The pipe tool comprises a handle rigidly attached to a spade at an angle of approximately 225 degrees. A cross-sectional shape of an upper extreme of the spade is that of an arc of approximately 70 degrees, and a lower extreme whose shape is that of a spherical section. A cross-sectional thickness of said spade decreases linearly from the spade upper extreme to the spade lower extreme. The handle has a tamper which is shaped like a half-circle.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: March 2, 1999
    Inventor: George M. Beaver
  • Patent number: 5871614
    Abstract: An improved process for delignification of lignocellulosic raw material, such as wood chips, for the production of cellulose pulps for use in the manufacture of paper or paperboard and an improved pulping aid composition for use in said process are disclosed wherein the wood chips are treated in a closed reaction vessel with an alkaline pulping liquor with an amount of a cyclic keto compound, such as anthraquinone, included therein for achievement of a determined pulp yield, wherein the improvement comprises a reduction in the amount of anthraquinone required to achieve said yield by the addition to said alkaline pulping liquor, in addition to a reduced amount of the anthraquinone, a surfactant mixture comprising at least one alkyl alcohol alkoxylate and at least one polyoxyalkylene glycol ether of an ester of an acid selected from the group consisting of ricinoleic acid and 12-hydroxystearic acid.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: February 16, 1999
    Assignee: Westvaco Corporation
    Inventor: William T. Turner
  • Patent number: 5871663
    Abstract: An improved process for delignification of lignocellulosic raw material, such as wood chips, for the production of cellulose pulps for use in the manufacture of paper or paperboard and an improved pulping aid composition for use in said process are disclosed wherein the wood chips are treated in a closed reaction vessel with an alkaline pulping liquor with an amount of a cyclic keto compound, such as anthraquinone, included therein for achievement of a determined pulp yield, wherein the improvement comprises a reduction in the amount of anthraquinone required to achieve said yield by the addition to said alkaline pulping liquor, in addition to a reduced amount of the anthraquinone, a surfactant mixture comprising at least one alkyl alcohol alkoxylate and at least one polyoxyalkylene glycol ether of an ester of an acid selected from the group consisting of ricinoleic acid and 12-hydroxystearic acid.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: February 16, 1999
    Assignee: Westvaco Corporation
    Inventor: William T. Turner
  • Patent number: 5863332
    Abstract: The invention involves a fluid treatment device and fluid treatment method to solution or melt coat or impregnate a resin or polymer to a predetermined, metered thickness into a substrate. The invention is effective in impregnating or coating various substrates in both a continuous or batch process on one side, two sides, or in the case of a porous substrate, penetration and complete saturation is possible. The invention offers significant advantages and benefits over existing methods and equipment and allows the coating or impregnation process to be performed at lower cost and higher efficiency with increased environmental safety.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: January 26, 1999
    Assignee: International Business Machines Corporation
    Inventors: Elizabeth Foster, Jeffrey Curtis Hedrick, Robert Maynard Japp, Kostas Papathomas, Stephen Leo Tisdale, Alfred Viehbeck
  • Patent number: 5861083
    Abstract: Method and equipment for the manufacture of corrugated paper products includes separate heaters for preparing liner and medium components. Data regarding these components is collected and an optimum conditioning for the components is determined.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: January 19, 1999
    Assignee: Inland Paperboard and Packaging, Inc.
    Inventors: Jerome J. Klockenkemper, Dennis M. Judge, Charles D. Moore
  • Patent number: 5858172
    Abstract: Wood pulp sheets treated with triacetin and other compounds, or solutions or emulsions of same, having increased softness while maintaining absorbency, and methods for producing same. More particularly, the invention relates to the treatment of wood pulp useful for making a fluff pulp using a softening agent including alkyl ethers, aryl ethers and formic, ethanoic and propanoic esters of low molecular weight glycols, such as triacetin, propylene glycol diacetate and 2-phenoxyethanol.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: January 12, 1999
    Assignee: Rayonier Inc.
    Inventors: Karl D. Sears, Peter R. Abitz
  • Patent number: 5853547
    Abstract: The present invention is an improved 7,3-broken twill, TAD fabric for use in the formation of a paper web. The present invention is also a process of using this fabric to produce a paper product having high bulk and absorbency. Finally, the present invention is the paper product produced in a TAD process using this fabric.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: December 29, 1998
    Assignee: Asten, Inc.
    Inventors: Frederick W. Ahrens, Thomas Gulya, Gary L. Worry, Walter P. Wright
  • Patent number: 5853538
    Abstract: Method of producing a nonwoven material by hydroentangling of a fiber web, whereby dry fibers, natural and/or synthetic, are metered into a dispersion vessel, possibly after pre-wetting. The fibers are dispersed in a foamable liquid including water and a tenside for forming a foamed fiber dispersion, which is applied to a wire and drained. The formed fiber web is subjected to hydroentangling directly after forming and the foamable liquid, after having passed through the wire, is recirculated to the dispersion vessel in a simple closed circuit.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: December 29, 1998
    Assignee: SCA Hygiene Paper AB
    Inventor: Lennart Reiner
  • Patent number: 5853543
    Abstract: A method of predicting the dry stock weight of paper that is produced by a papermaking machine based on simultaneousness measurements of (1) the water weight of the paper stock on the fabric or wire of the papermaking machine and of (2) the dry stock weight of the paper product is provided. The invention which provides a linearized model of the de-watering process is based in part on that creation of drainage characteristic curves that provides an effective means of predicting the drainage behavior of the paper stock on the fabric of a de-watering system.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: December 29, 1998
    Assignee: Honeywell-Measurex Corporation
    Inventors: Hung-Tzaw Hu, Francis Tu
  • Patent number: 5848595
    Abstract: A cigarette package comprising an inner and outer section can be slidably connected so that an ashtray portion can be formed when the cigarette package is placed in the extended position. The inner section can be a cigarette holding portion which allows the cigarettes to be accessed in this extended position. In a closed position, the lid for the cigarette package can be prevented from opening by the outer section. Additionally, the use of a hole in the package about the same diameter as a cigarette can be used to extinguish butts placed into the ashtray portion. Furthermore, a vacuum device can be used to turn the ashtray portion into a smokeless ashtray.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: December 15, 1998
    Inventor: Will Eugene Arthur