Patents by Inventor Juhani Ahola

Juhani Ahola 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 device for photoelectric identification of a material web
    Patent number: 5467194
    Abstract: A method and apparatus for identifying a moving web in a paper making machine are disclosed. The method includes of the steps of illuminating the web with the light from a transmitter, reflecting the transmitted light off the web, receiving the reflected light with a light transducer to produce an electrical signal corresponding to the intensity of the received light, and identifying the moving web based on the received signal. The intensity of the transmitted light is adjusted so that the received light signal from the transducer is normalized with respect to an optimum value. The apparatus includes a light transmitter, a light receiver, and a control and identification circuit which identifies the web based on a signal from the light receiver, and which adjusts the intensity of the light transmitter to optimize the reception of the signal from the light receiver in order to minimize the effects of environmental interference.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: November 14, 1995
    Assignee: Valmet Paper Machinery, Inc.
    Inventors: Kari Pellinen, Jukka Koiranen, Kari Erkkila, Juhani Ahola, Harri Vahatalo