Patents by Inventor Hannu Komulainen

Hannu Komulainen 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).

  • Method and measuring arrangement for measuring paper surface
    Patent number: 6549286
    Abstract: The invention relates to a method and a measuring arrangement for determining roughness of paper or paperboard. The paper or paperboard surface is illuminated with collimated light substantially parallel with the normal of the paper or paperboard surface. An image is produced from the paper or paperboard surface by means of reflected optical radiation. The reflected optical radiation is used for producing an image of the paper or paperboard surface onto the pixels of the camera's detector surface, each of the pixels imaging an area in the order of micrometers of the paper or paperboard surface. An aperture provided in front of the camera is used for adjusting the depth of focus of the image, which affects the measurement of roughness. Roughness of paper or paperboard is measured on the basis of the intensity of the pixels on the camera's detector surface.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: April 15, 2003
    Assignee: Metso Automation Oy
    Inventors: Hannu Komulainen, Jaana Hakkarainen, Keijo Lehmikangas
  • Method and measuring arrangement for measuring paper surface
    Patent number: 6504617
    Abstract: The invention relates to a method and a measuring arrangement for determining gloss of paper or paperboard. The paper or paperboard surface is illuminated with collimated light substantially parallel with the normal of the paper or paperboard surface. An image is produced from the paper or paperboard surface by means of reflected optical radiation. The reflected optical radiation is used for producing an image of the paper or paperboard surface onto the pixels of the camera's detector surface, each of the pixels imaging an area in the order of micrometers of the paper or paperboard surface. An aperture provided in front of the camera is used for adjusting the incidence angles of the reflected radiation, which affects the measurement of gloss. Gloss of paper or paperboard is measured on the basis of the intensity of the pixels on the camera's detector surface.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: January 7, 2003
    Assignee: Metso Paper Automation Oy
    Inventors: Hannu Komulainen, Jaana Hakkarainen, Keijo Lehmikangas
  • Method and measuring arrangement for measuring paper
    Publication number: 20020114494
    Abstract: The invention relates to a method and a measuring arrangement for determining gloss of paper or paperboard. The paper or paperboard surface is illuminated with collimated light substantially parallel with the normal of the paper or paperboard surface. An image is produced from the paper or paperboard surface by means of reflected optical radiation. The reflected optical radiation is used for producing an image of the paper or paperboard surface onto the pixels of the camera's detector surface, each of the pixels imaging an area in the order of micrometers of the paper or paperboard surface. An aperture provided in front of the camera is used for adjusting the incidence angles of the reflected radiation, which affects the measurement of gloss. Gloss of paper or paperboard is measured on the basis of the intensity of the pixels on the camera's detector surface.
    Type: Application
    Filed: September 14, 2001
    Publication date: August 22, 2002
    Applicant: Metso Paper Automation Oy
    Inventors: Hannu Komulainen, Jaana Hakkarainen, Keijo Lehmikangas
  • Method and measuring arrangement for measuring paper surface
    Publication number: 20020113975
    Abstract: The invention relates to a method and a measuring arrangement for determining roughness of paper or paperboard. The paper or paperboard surface is illuminated with collimated light substantially parallel with the normal of the paper or paperboard surface. An image is produced from the paper or paperboard surface by means of reflected optical radiation. The reflected optical radiation is used for producing an image of the paper or paperboard surface onto the pixels of the camera's detector surface, each of the pixels imaging an area in the order of micrometers of the paper or paperboard surface. An aperture provided in front of the camera is used for adjusting the depth of focus of the image, which affects the measurement of roughness. Roughness of paper or paperboard is measured on the basis of the intensity of the pixels on the camera's detector surface.
    Type: Application
    Filed: October 31, 2001
    Publication date: August 22, 2002
    Applicant: Metso Paper Automation Oy
    Inventors: Hannu Komulainen, Jaana Hakkarainen, Keijo Lehmikangas