White Water Patents (Class 162/190)
  • Method for treating pulp-containing waste liquors
    Patent number: 3960648
    Abstract: A process for treating a pulp-containing waste liquor which comprises adding a flocculating agent to the pulp-containing waste liquor and separating and removing the resulting flocculated matter, characterized in that about 1 to about 50 parts by weight, per 1000 parts by weight of the turbid components in said waste liquor, of a dicyandiamideformaldehyde resin is admixed with the waste liquor, and then aluminum sulfate is added to the mixture.
    Type: Grant
    Filed: February 7, 1975
    Date of Patent: June 1, 1976
    Assignee: Nippon Carbide Kogyo Kabushiki Kaisha
    Inventors: Mikio Nakajima, Kiyoaki Kuwabara
  • Downflow control system for web making machines
    Patent number: 3960653
    Abstract: A whitewater system is provided for handling at high velocity the large quantities of water that are circulated in the high speed forming of pulp using a wire and forming wheel. Use of a centrifugal collector to transfer water from within a forming loop at velocities approaching that of wire speed permits the water to be partially deaerated automatically, so that return as white water to the pulping system is facilitated.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: June 1, 1976
    Assignee: Dominion Engineering Works, Limited
    Inventors: Ralph James Futcher, Alexander Malashenko
  • Method and device for spraying fluid into a headbox
    Patent number: 3933966
    Abstract: In a device for feeding fiber suspension to the web-forming part of a paper machine the tendency of the fibers in the suspension to flocculate and form fiber clusters, before being fed onto the web-forming wire, is eliminated by spraying jets of water or steam or both into the head box which is supplied with a fiber suspension of a consistency greater than the desired. The jets cause strong turbulences in the head box and thereby effectively disperse the fiber clusters.
    Type: Grant
    Filed: May 13, 1974
    Date of Patent: January 20, 1976
    Assignee: A. Alhstrom Osakeyhtio
    Inventors: Veikko Kaarlo Tapio Waris, Frey Viking Sundman