Patents by Inventor Bertil Ernerfeldt

Bertil Ernerfeldt 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).

  • Arrangement, system and method for treatment of cellulose pulp
    Patent number: 8303769
    Abstract: Apparatus for screening cellulose pulp streams is disclosed including first and second screens contained in a housing, and a primary inlet for directing the cellulose pulp stream into the housing, an accept outlet for withdrawing an accept portion from the housing, a reject outlet for withdrawing a reject portion from the housing, a first accept chamber for receiving the accept portion which has passed through the first screen, a second screen chamber for directing the first accept portion to the second screen, and a secondary pulp inlet for receiving a second cellulose pulp feed stream comprising a screened cellulose pulp accept fraction and directing it to the second screen whereby the second accept fraction is delivered to the accept outlet. Methods and systems for screening cellulose pulp systems are also disclosed.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: November 6, 2012
    Assignee: Metso Paper, Inc.
    Inventors: Andreas Engelfeldt, Bertil Ernerfeldt, David Lindkvist
  • ARRANGEMENT, SYSTEM AND METHOD FOR TREATMENT OF CELLULOSE PULP
    Publication number: 20120000619
    Abstract: Apparatus for screening cellulose pulp streams is disclosed including first and second screens contained in a housing, and a primary inlet for directing the cellulose pulp stream into the housing, an accept outlet for withdrawing an accept portion from the housing, a reject outlet for withdrawing a reject portion from the housing, a first accept chamber for receiving the accept portion which has passed through the first screen, a second screen chamber for directing the first accept portion to the second screen, and a secondary pulp inlet for receiving a second cellulose pulp feed stream comprising a screened cellulose pulp accept fraction and directing it to the second screen whereby the second accept fraction is delivered to the accept outlet. Methods and systems for screening cellulose pulp systems are also disclosed.
    Type: Application
    Filed: March 9, 2010
    Publication date: January 5, 2012
    Applicant: METSO PAPER, INC.
    Inventors: Andreas Engelfeldt, Bertil Ernerfeldt, David Lindkvist