Bleaching Patents (Class 205/690)
  • Patent number: 8390603
    Abstract: A method for driving a flat panel display is provided. The flat panel display has n scan lines, wherein n is a positive integer. Each of the scan lines is coupled to a plurality of pixels. The driving method according to the invention includes the steps as follows: when pixels coupled to a kth scan line are enabled, pixels coupled to the scan lines from the first to k?1th are disabled and pixels coupled to at least a part of scan lines from k+1th to nth are enabled, thus pre-charging the enabled pixels of scan lines from k+1th to nth is performed thereby, wherein k is a positive integer.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: March 5, 2013
    Assignee: AU Optronics Corporation
    Inventor: Chien-Yu Yi
  • Patent number: 7294233
    Abstract: A system and method for altering the tack of a material, namely a polymer used as an adhesive, also known as stickies, or pitch. The present invention reduces the tack of the stickies and pitch by exposing the materials for a short duration to low-energy pulsed electrical discharges between a pair of electrodes that are submerged in a liquid medium, such as a fiber stream, water, a pulp slurry, or whitewater.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: November 13, 2007
    Assignee: Georgia Tech Research Corporation
    Inventors: Sujit Banerjee, Howard Corcoran
  • Patent number: 7267744
    Abstract: This invention provides a process for treating chemical woodpulp, or chemical cellulose including cotton linter, including the step of applying an electron processing technology (EPT) step to chemical woodpulp, or chemical cellulose, as the case may be, on an in-line basis to provide control of pulp viscosity or degree of polymerization (DP). The invention also provides a method of process control in treating the aforementioned woodpulp or cellulose, including the step of using radiation dose-viscosity relationship curve for applying an EPT step on an in-line basis. The in-line EPT step may, in one form of the invention, replace and hence eliminate a chemical DP reduction step.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: September 11, 2007
    Assignee: Sappi Limited
    Inventors: Ian Graveson, Heinzhorst Mobius, Derek Andrew Weightman
  • Patent number: 6841058
    Abstract: A redox bipolar cell fabric washing system and method is disclosed that provides for washing fabrics without the use of any added detergents, fabric softeners, or bleaches, or other chemical al additives. The system includes a conventional fabric washing machine with a redox bipolar cell that through a circulation pump continuously treats the wash water by using mixed oxidants or charged wash water to remove contaminants from the fabric. The redox cell includes a housing, a plurality of cathode plates, a plurality of membranes, and a plurality of anodes proximately positioned in an alternate manner with a plurality of flow channels in the housing. The cell produces charged wash water by an electrochemical reaction utilizing electrically charged anodes and cathodes with semi permeable membranes, wherein the oxidation reduction potential of the charged wash water is continuously controlled with a sensor to determine when the fabrics are clean.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: January 11, 2005
    Inventors: Brian G. Culvey, Kim Bong Jun
  • Patent number: 6511578
    Abstract: The invention relates to a method of bleaching and/or delignifying cellulose, in which (a) a sodium hydroxide solution and a peroxydisulphate solution are first of all produced by electrolysis of a sulphate, (b) the peroxydisulphate solution is converted by hydrolysis into a Caro's acid/caroate solution, (c) said Caro's acid/caroate solution is left to cool and (d) used immediately as a bleaching solution for bleaching and/or delignifying cellulose, the Caro's acid/caroate solution becoming neutralised upon introduction into the bleaching solution.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: January 28, 2003
    Assignee: Peroxid-Chemie GmbH & Co. KG
    Inventors: Maximilian Dorn, Michael Gnann, Sven Gutewort, Werner Sebb
  • Patent number: 6187170
    Abstract: System for the electrochemical cleavage of compounds which includes a mediator which has no metals or heavy metals and at least two electrodes for the electrochemical activation of the mediator.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: February 13, 2001
    Assignee: Consortium für elektrochemische Industrie GmbH
    Inventor: Norbert Hampp
  • Patent number: 5810996
    Abstract: Electro-osmotic (or electrokinetic) transport is used to efficiently force a solution (or water) through the interior of the fibers or yarns of textile materials for wet processing of textiles. The textile material is passed between electrodes that apply an electric field across the fabric. Used alone or in parallel with conventional hydraulic washing (forced convection), electro-osmotic transport greatly reduces the amount of water used in wet processing. The amount of water required to achieve a fixed level of rinsing of tint can be reduced, for example, to 1-5 lbs water per pound of fabric from an industry benchmark of 20 lbs water/lb fabric.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: September 22, 1998
    Assignee: The Regents of The University of California
    Inventor: John F. Cooper