Patents by Inventor Gilbert Forrester

Gilbert Forrester 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).

  • Apparatus for extracting a sample
    Patent number: 4827775
    Abstract: An apparatus for extracting a sample of fibrous particles from a liquid suspension comprising a nozzle adapted to be connected to a supply of pressurized liquid and an inlet funnel connected to a sample delivery tube. Both the nozzle and the funnel are immersed in the suspension and the nozzle is directed into the inlet of the funnel.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: May 9, 1989
    Inventor: Gilbert Forrester
  • Method and apparatus for measuring the distribution of fiber widths and adjusting the refining of fibrous stock
    Patent number: 4692210
    Abstract: A method and apparatus for making paper by refining fibrous stock. The stock is passed through an adjustable refining means and a sample of the refined stock is analyzed using a fibre fineness distribution analyzer to produce, over a range of fibre widths, counts of the number of fibres in the sample which have a selected fibre width. Fibre width is plotted against fibre count at intervals of 1 .mu.m over the range of from 7 .mu.m to 64 .mu.m to obtain a fibre fineness distribution curve. The fibre fineness distribution curve is compared with a reference fibre fineness distribution curve obtained by the prior analysis of stock known to have produced paper of desired quality. The refining means is then adjusted to produce a stock the analysis of which produces a distribution curve substantially the same as the reference curve.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: September 8, 1987
    Inventor: Gilbert Forrester