Patents by Inventor Arne I. Klausen

Arne I. Klausen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for bleaching cellulose pulp, a plant for preforming said process, and a screw press for use with said process and plant
    Patent number: 4838995
    Abstract: For bleaching cellulose pulp or a fraction thereof, e.g. reject pulp, the cellulose pulp or fraction, having a concentration of 0.5-10%, preferably 3-6%, is introduced into a screw press comprising at least a first (47) and a second (48) dewatering zone, is dewatered in the first zone to a concentration of 20-40%, whereupon a liquor of bleach chemicals is introduced centrally into the pulp which, during continued treatment, is dewatered in the second zone to a discharge pulp concentration of 15-50, preferably 15-30%, the liquid pressed out of the second zone, together with fresh bleach chemicals, being returned to the pulp in the screw press as liquor of bleach chemicals.
    Type: Grant
    Filed: January 28, 1987
    Date of Patent: June 13, 1989
    Assignee: Thune-Eureka A/S
    Inventor: Arne I. Klausen