Patents Assigned to Cartons St-Laurent, Inc./St. Laurent Paperboard, Inc.
  • Patent number: 5753078
    Abstract: A method for making a surface coated or impregnated paper or paperboard by applying an aqueous additive dispersion to the wet web between the press and drying sections of a conventional paper or paperboard making machine. The aqueous additive dispersion is pre-metered onto a transfer roll and is applied to the wet web at a pressure nip between the transfer roll and a back-up roll. High solids content dispersions can be applied at high web speeds without tearing the web. The use of a high solids content aqueous dispersion having a solids content substantially equal to the solids content of the wet web at the point of application permits the method to be performed without increasing the drying load and therefore at an unreduced speed.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: May 19, 1998
    Assignee: Cartons St-Laurent, Inc./St. Laurent Paperboard, Inc.
    Inventors: Serge Koutitonsky, Stephane Rousseau