Producing Paper Pulp Patents (Class 435/278)
  • Method for recovering pulp from pressure-sensitive carbonless copying paper waste
    Patent number: 4450043
    Abstract: A process for recovering pulp from pressure-sensitive carbonless copying paper waste is disclosed. This process includes defibrating the waste without substantial rupture of the microcapsules, treating the defibrated waste with an enzyme for starch saccharification and separating the fibers from the released microcapsules by means of a sidehill screen equipped with a washing shower.
    Type: Grant
    Filed: March 12, 1982
    Date of Patent: May 22, 1984
    Assignee: Appleton Papers Inc.
    Inventor: William J. Schulz
  • Production of paper pulp from sugar mill bagasse
    Patent number: 4260452
    Abstract: Paper pulp is produced by a process in which raw sugar mill bagasse is moist depithed, wet bulk stored in the presence of an inorganic and organic preservative, wet depithed by hydraulic shearing in the presence of an inorganic color remover, pulped, washed, cleaned and dewatered.
    Type: Grant
    Filed: November 24, 1978
    Date of Patent: April 7, 1981
    Inventors: Horst Kruger, Wilhelm Berndt, Ursula Schwartzkopff, Franz J. Reitter, Theodor Hopner, Hans-Joachim Muhlig