Patents by Inventor Paul M. Shallhorn

Paul M. Shallhorn 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 apparatus for on-line monitoring of specific surface of mechanical pulps
    Patent number: 4441960
    Abstract: The specific surface distribution of a pulp may be obtained by fractionating the pulp in a hydrocyclone means into an overflow and an underflow fraction and measuring the specific surface of each of the fractions and the amount of each of the fractions and based on a cumulative normal distribution relationship of cumulative weight fraction as a percent of feed to specific surface, determining the specific surface distribution for said pulp.Also disclosed is a method and apparatus for determining the specific surface of a pulp sample by measuring the light scattering characteristics to obtain a turbidity measurement of the pulp sample, measuring the consistency of the sample and determining the specific surface of said pulp based on the relationship of specific surface to the turbidity measurement for the measured consistency of the pulp.
    Type: Grant
    Filed: November 26, 1979
    Date of Patent: April 10, 1984
    Inventors: Alkibiadis Karnis, Paul M. Shallhorn
  • Method and apparatus on-line monitoring of fibre length of mechanical pumps
    Patent number: 4342618
    Abstract: A method and an apparatus for determining the fibre length distribution by weight of a pulp and a method and apparatus for determining absolute consistency are disclosed.The fibre length distribution is obtained by dividing the flow of a pulp sample into two separate flows, fractionating each of the flows by a screen into a retained and a through fraction, the screens being of different mesh sizes, measuring the amounts of each of a selected one of said retained or through fractions and determining, based on the cumulative normal distribution relationship of cumulative retained fraction in % of feed to fibre length, the fibre length distribution of the pulp sample.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: August 3, 1982
    Inventors: Alkibiadis Karnis, Paul M. Shallhorn
  • Method and apparatus for on-line monitoring of specific surface of mechanical pulps
    Patent number: 4276119
    Abstract: The specific surface distribution of a pulp may be obtained by fractionating the pulp in a hydrocyclone means into an overflow and an underflow fraction and measuring the specific surface of each of the fractions and the amount of each of the fractions and based on a cumulative normal distribution relationship of cumulative weight fraction as a percent of feed to specific surface, determining the specific surface distribution for said pulp.Also disclosed is a method and apparatus for determining the specific surface of a pulp sample by measuring the light scattering characteristics to obtain a turbidity measurement of the pulp sample, measuring the consistency of the sample and determining the specific surface of said pulp based on the relationship of specific surface to the turbidity measurement for the measured consistency of the pulp.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: June 30, 1981
    Assignee: Domtar Inc.
    Inventors: Alkibiadis Karnis, Paul M. Shallhorn