Patents by Inventor Kari Luostarinen

Kari Luostarinen 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 instrument for measuring water content
    Patent number: 8188751
    Abstract: For measuring the water content of a web in the wire section of a paper machine, at least one radiofrequency-operated resonator sensor forms an electric near field, in which a web affects the resonance frequency of each resonator sensor. The water content of the web is measured as a function of the resonance frequency of each resonator sensor in a measuring unit.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: May 29, 2012
    Assignees: Senfit Oy, Metso Paper, Inc
    Inventors: Pekka Jakkula, Jarmo Karhu, Kari Luostarinen, Matti Limingoja
  • Method and Measuring Instrument for Measuring Water Content
    Publication number: 20080211516
    Abstract: For measuring the water content of a web in the wire section of a paper machine, at least one radiofrequency-operated resonator sensor forms an electric near field, in which a web affects the resonance frequency of each resonator sensor. The water content of the web is measured as a function of the resonance frequency of each resonator sensor in a measuring unit.
    Type: Application
    Filed: May 15, 2006
    Publication date: September 4, 2008
    Applicant: Elektrobit Microwave Oy
    Inventors: Pekka Jakkula, Jarmo Karhu, Kari Luostarinen, Matti Limingoja
  • Method of measuring flow, and flow meter
    Patent number: 6009760
    Abstract: A flow meter for measuring the flow in a dielectric pipe is disclosed. Two microwave signals are transmitted at measurement points via at least two transmitter antennae through the dielectric pipe and a flowing material. The distance between the measurement points is known. The signals that have passed through are received by receiver antennae and signal cross correlation is formed by a correlator, the flow rate being determined on the basis of the best correlation result. The measurement result is improved by filtering and/or directing the signals.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: January 4, 2000
    Assignee: Valmet Automation Inc.
    Inventors: Pekka Jakkula, Kari Luostarinen, Esko Tahkola
  • Apparatus for preventing vibrations of a roll set
    Patent number: 5915297
    Abstract: An apparatus for reducing or preventing vibrations of a roll set of a paper making apparatus, wherein the roll set comprises at least two rolls of which at least one is a soft roll coated with a compressible coating and comprising a temperature control system. The natural vibrational frequency of the roll set is changed during the operation of the apparatus by changing the temperature of the coating of the at least one soft roll. The changing of the natural frequency prevents resonance on a natural frequency of the roll set.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: June 29, 1999
    Assignee: Valmet Corporation
    Inventors: Esa Lehtovirta, Jorma Kolio, Markku Salo, Kari Luostarinen
  • Method for preventing vibrations of a roll set
    Patent number: 5768985
    Abstract: A method for reducing or preventing vibrations of a roll set of a paper making apparatus, wherein the roll set comprises at least two rolls of which at least one is a soft roll coated with a compressible coating and comprising a temperature control system. The natural vibrational frequency of the roll set is changed during the operation of the apparatus by changing the temperature of the coating of at least one soft roll. The changing of the natural frequency prevents resonance on a natural frequency of the roll set.
    Type: Grant
    Filed: December 11, 1995
    Date of Patent: June 23, 1998
    Assignee: Valmet Corporation
    Inventors: Esa Lehtovirta, Jorma Kolio, Markku Salo, Kari Luostarinen