Patents by Inventor Kai E.J. Vikman

Kai E.J. Vikman 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 producing mechanical pulp suitable for paper or cardboard making
    Patent number: 8764936
    Abstract: Method for the production of mechanical or chemi-mechanical pulp as raw material for paper or cardboard. According to this method, the pulp is fibrillated and the fibrillated pulp is bleached in alkaline conditions. According to the present invention, the pulp is screened to separate the reject from the accept, at maximum approximately 60% of the total amount of pulp is separated as the reject, the reject is bleached separate from the accept, and, after that, the bleached reject is remixed with the accept. When operating according to the present invention, the strength of the pulp increases and the energy used for refining is reduced, which is seen both in the refining of the reject and in the post-refining of the final mechanical pulp.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: July 1, 2014
    Assignee: M-real Oyj
    Inventors: Auli Laurila-Lumme, Markku Leskelä, Kristiina Manninen, Ole Nickull, Isto Nikamaa, Marko Pekkola, Maija Pitkänen, Pirita Suortamo, Kai E. J. Vikman
  • Process for Producing Mechanical Pulp Suitable for Paper or Cardboard Making
    Publication number: 20090032207
    Abstract: Method for the production of mechanical or chemi-mechanical pulp as raw material for paper or cardboard. According to this method, the pulp is fibrillated and the fibrillated pulp is bleached in alkaline conditions. According to the present invention, the pulp is screened to separate the reject from the accept, at maximum approximately 60% of the total amount of pulp is separated as the reject, the reject is bleached separate from the accept, and, after that, the bleached reject is remixed with the accept. When operating according to the present invention, the strength of the pulp increases and the energy used for refining is reduced, which is seen both in the refining of the reject and in the post-refining of the final mechanical pulp.
    Type: Application
    Filed: May 3, 2006
    Publication date: February 5, 2009
    Applicant: M-REAL OYJ
    Inventors: Auli Laurila-Lumme, Markku Leskela, Kristiina Manninen, Ole Nickull, Isto Nikamaa, Marko Pekkola, Maija Pitkanen, Pirita Suortamo, Kai E.J. Vikman