Patents by Inventor Heikki Pakarinen

Heikki Pakarinen 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).

  • Printing paper
    Patent number: 6923889
    Abstract: The invention relates to coated printing paper which contains mechanical pulp and whose opacity is at least 89%, brightness at least 65% and surface roughness not more than 4.5 ?m. The printing paper contains mechanical pulp at least 90 weight-% of the total fiber content of the paper.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: August 2, 2005
    Assignee: UPM-Kymmene
    Inventors: Jouni Huuskonen, Timo Koskinen, Heikki Pakarinen, Timo Toivanen, Mika Kosonen
  • Printing paper
    Publication number: 20040154765
    Abstract: The invention relates to coated printing paper which contains mechanical pulp and whose opacity is at least 89%, brightness at least 65% and surface roughness not more than 4.5 &mgr;m. The printing paper contains mechanical pulp at least 90 weight-% of the total fibre content of the paper.
    Type: Application
    Filed: November 19, 2003
    Publication date: August 12, 2004
    Applicant: UPM-Kymmene
    Inventors: Jouni Huuskonen, Timo Koskinen, Heikki Pakarinen, Timo Toivanen, Mika Kosonen
  • Process for producing a paper web having calcium carbonate filler by introducing carbon dioxide to the pulp
    Patent number: 6623599
    Abstract: A papermaking process wherein calcium carbonate is included in a pulp suspension. The dissolution of the calcium carbonate in the papermaking system is substantially retarded by the introduction of carbon dioxide to said pulp suspension. The invention also provides processes for the production of paper or board in papermaking systems wherein solid calcium carbonate is present as a filler and/or pigment.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: September 23, 2003
    Assignees: AGA Aktiebolag, UPM-Kymmene Corporation
    Inventors: Auli Laurila-Lumme, Heikki Pakarinen, Hannu Juhani Leino
  • Process for substantially retarding dissolution of calcium carbonate in a papermaking system
    Patent number: 6540870
    Abstract: The invention relates to papermaking processes wherein calcium carbonate is included in a pulp suspension. The dissolution of the calcium carbonate in the papermaking system is prevented or substantially retarded by the introduction of carbon dioxide to said pulp suspension in connection with subjecting said calcium carbonate in said papermaking system to pH conditions of about 8 or lower. The invention also provides processes for the production of paper or board in papermaking systems wherein solid calcium carbonate is present as a filler and/or pigment.
    Type: Grant
    Filed: January 3, 2000
    Date of Patent: April 1, 2003
    Assignees: AGA Aktiebolag, UPM-Kymmene Corp.
    Inventors: Auli Laurila-Lumme, Heikki Pakarinen, Hannu Juhani Leino