Patents Represented by Attorney, Agent or Law Firm George A. Frank
  • Method for textile treatment for spandex containing fabrics
    Patent number: 6713410
    Abstract: A method of treating textile which is yarn or fabric containing spandex fibres, comprising contracting the textile with a perfume so that the perfume is deposited on the fabric. The perfume contains a mixture of fragrance materials which preferentially deposit on the spandex fibres. The yarn of fabric may be made up into garments.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: March 30, 2004
    Assignee: E.I. du Pont de Nemours and Co.
    Inventors: Keith Douglas Perring, Christopher Francis Clements, Angus Peter MacMaster, Raymond Palmen, Olivier William John
  • Spinning cell and method for dry spinning spandex
    Patent number: 6248273
    Abstract: A spinning cell for dry spinning spandex by extruding filaments from a nonuniform array of spinneret capillary groups in a rectangular bar and contacting them with a cross-flow of hot, inert gas is provided.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: June 19, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joshua Benin, Gary L. Caldwell, George W. Goldman, Charles S. Huffer, Gang Jin, James F. McKinney, William M. Ollinger, Jerzy Spolnicki, David A. Wilson
  • Method for producing a shaped multifilament, non-thermoplastic, elastomeric yarn
    Patent number: 6248197
    Abstract: The present invention provides a method for producing multifilament elastomeric yarn of modified cross-sectional shape and surface by hot-pressing a coalesced elastomeric multifilament yarn between rolls, thereby modifying the cross-sectional shape and/or surface of the multifilament.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: June 19, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Hideki Nakanishi, Satoshi Wakisaka, Yukio Ohta
  • Stable double covered elastic yarn, process for making same, and fabric comprising same
    Patent number: 6240716
    Abstract: A double-covered yarn based on a spandex core having a heat set of at least 50% and two sheath yarns wound in the same direction, a process for the preparation of such yarn and fabrics produced therefrom, are provided.
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: June 5, 2001
    Assignee: DuPont Toray Company, Ltd.
    Inventors: Takeshi Yanagawase, Shoichi Hayashi
  • Spandex with low tackiness and process for making same
    Patent number: 6232374
    Abstract: Spandex containing certain anti-tack additives and having good dry-spinning continuity, and the process for making such spandex are provided.
    Type: Grant
    Filed: July 26, 1999
    Date of Patent: May 15, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Hong Liu, Robert Lee Lock, Bryan Benedict Sauer, Iftekhar A. Karimi
  • Stable polyurethaneurea solutions
    Patent number: 6225435
    Abstract: A viscosity-stable solution of a polyurethaneurea, in the substantial absence of viscosity stabilizers, and spandex dry-spun therefrom, prepared from certain polyether glycols and aliphatic diisocyanates and ethylene diamine, are provided.
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: May 1, 2001
    Assignee: DuPont Toray Co. Ltd.
    Inventors: Shingo Ito, Toshikazu Matsuda, Masao Umezawa
  • Beam let-off apparatus and a method for letting off filaments
    Patent number: 6216747
    Abstract: A beam let-off apparatus capable of adjusting the tension of a plurality of filaments as they are removed from a beam through the controlled movement of a pivoting arm directed by the tension of the unwinding filaments, comprises a frame, a driven roll, 1-3 idler rolls on the frame and a dancer roll mounted on pivoting arms mounted on the frame wherein the filaments pass under and around the dancer roll through a defined wrap angle is provided.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: April 17, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: John Stevens Rutter Lawrence
  • Coalesced multifilament spandex and method for its preparation
    Patent number: 6214145
    Abstract: The present invention provides a process whereby high quality, well-coalesced spandex can be made by dry-spinning a high-melting thermoplastic polyurethane, bundling the as-spun filaments into a side-by-side relationship, and passing the bundled filaments over or through a guide. The spandex made by this method has high heat-settability, high denier uniformity, good knittability and weavability, and provides fabrics having good surface uniformity.
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: April 10, 2001
    Assignee: DuPont Toray Co., Ltd.
    Inventors: Masao Umezawa, Hideki Nakanishi, Toshikazu Matsuda
  • Process for making composite sheet
    Patent number: 6179946
    Abstract: A process and an apparatus for high speed manufacture of a composite sheet material, which includes a cylindrical cam-driven strand-traverse guide that can loop strands around pins projecting from a pair of advancing pin conveyors which can transfer the strands to the surface of a moving sheet, are provided. When the strands are elastic, the elastic composite sheet material made by this process and apparatus are useful in elastic components of disposable diapers, adult incontinence articles and other garments.
    Type: Grant
    Filed: February 26, 1998
    Date of Patent: January 30, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Roch Ward, Joshua Benin, Cathy Jane Hamilton, Leslie C. Talo
  • Method for heat-setting spandex-containing garments
    Patent number: 6174486
    Abstract: A method of heat-setting garments by boarding the garment and subjecting it to preselected temperatures that are different for different parts of the garment and an apparatus for carrying out this method are provided.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: January 16, 2001
    Assignee: DuPont Toray Co. Ltd.
    Inventors: Tateo Jin-Ya, Hirofumi Matsuda
  • Preparation of poly (urethaneurea) fibers
    Patent number: 6171537
    Abstract: A process for the preparation of poly(urethaneurea) fibers by reacting a blocked aliphatic diamine with a capped glycol prepolymer, followed by extrusion spinning, is provided.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: January 9, 2001
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Jeffrey David Cohen
  • Process for melt spinning spandex
    Patent number: 6127506
    Abstract: A process for melt spinning spandex, utilizing a polyurethaneurea polymer prepared from a purified capped glycol, linear aliphatic diamines and a monoamine chain terminator, is provided.
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: October 3, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Robin N. Greene
  • Apparatus for high speed beaming of elastomeric yarns
    Patent number: 6126102
    Abstract: A beaming apparatus that includes a creel and warper head, the creel being positioned adjacent to the warper head, the creel having elastomeric yarn unwinder assemblies which include a guide support that supports rotating guides and stationary wound cakes of elastomeric yarn, a thread guide for orienting the unwound yarn towards the warper head, a front guide and tension bar positioned near the end of the creel, and a pivoting reed positioned before the warper head for orienting the yarn onto a beam are provided.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: October 3, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jacek Zygmunt Mycielski, Gerardus van den Hoven, Frederik Jan Groot, Johannes Leonardus Jozefus Brouwers
  • Method for beaming elastomeric fibers
    Patent number: 6125515
    Abstract: A method for winding elastomeric fibers at a predetermined beam-stretch by stretching the fibers to 35-75% of their elongation-to-break value.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: October 3, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John Ernest Boliek, Klaus Joachim Regenstein
  • Process of making polyurethane fiber
    Patent number: 6096252
    Abstract: A process for preparing durable dry-spun, polyurethane fiber exhibiting a small angle X-ray scattering pattern that forms a layer line scattering image or an eyebrow-shaped four dot scattering image is provided. The fiber is particularly useful in pantyhose, undergarments and the like.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: August 1, 2000
    Assignee: Dupont Toray Co., Ltd.
    Inventors: Masao Umezawa, Hideki Nakanishi, Tsutomu Watanabe
  • Process for making a spandex supply package
    Patent number: 6086004
    Abstract: A process for preparing a spandex supply package with minimal package relaxation variations along the length of spandex utilizing precalculated variable winding speeds for different segments of the package, calculated from package relaxation values of a reference spandex supply package, and uniform supply packages prepared by this process, are provided.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: July 11, 2000
    Assignee: DuPont-Torav Company, Ltd.
    Inventors: Takamasa Uchida, Kazue Oka
  • Spandex prepared with hindered diisocyanates
    Patent number: 6063892
    Abstract: Polurethaneaureas prepared with 2,2-bis(4-isocyanatophenyl)propane or 1,4-bis(4-isocyanato-alpha,alpha-dimethylbenzyl)benzene, and spandex spun from such polyurethaneureas, are provided.
    Type: Grant
    Filed: October 5, 1999
    Date of Patent: May 16, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Nathan E. Houser, Chad J. Kolaskie
  • Spandex containing barium sulfate
    Patent number: 6027803
    Abstract: Low tack dry-spun spandex containing barium sulfate of low isoelectric point is provided.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: February 22, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Howard Wayne Jacobson, Charles William Goodrich
  • Winder for synthetic filaments
    Patent number: 6015113
    Abstract: A compact multi-position spindle-and-turret winder for winding synthetic continuous fibers having a first winding position and one-four subsequent indexed winding positions and a method for winding continuous filaments are provided.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: January 18, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Thomas Patrick Daly, Joseph Edward Koskol, Kevin Robert Madigan, Jun Takagi, Naofumi Yamauchi
  • Spandex made with 1,3-diaminopentane
    Patent number: 5981686
    Abstract: A polyurethaneurea polymer and spandex spun therefrom, based on polymeric ester or ether glycols and MDI at certain capping ratios, and 1,3-diaminopentane chain extender, are provided.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: November 9, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Robert Otto Waldbauer, Jr.