Patents by Inventor Howard Lyle Helmer

Howard Lyle Helmer 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).

  • Testing and correcting metering accuracy of multihole spinnerets
    Patent number: 4001359
    Abstract: A method and apparatus for off-line testing and correcting the metering accuracy of a split multihole spinneret fed by a single metered stream by determining end to end variations in flow rate and by reworking a number of holes in the lower flow rate side of the split spinneret, calculated by multiplying the average test percent bias of the split spinneret by a predetermined constant, so as to bring end to end variations in flow rate to within a required accuracy.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: January 4, 1977
    Assignee: Allied Chemical Corporation
    Inventors: William Bernard Fisher, Howard Lyle Helmer, David Pendlebury
  • Testing and correcting metering accuracy of multihole spinnerets
    Patent number: 3930775
    Abstract: A method and apparatus for off-line testing and correcting the metering accuracy of a split multihole spinneret fed by a single metered stream by determining end to end variations in flow rate and by reworking a number of holes in the lower flow rate side of the split spinneret, calculated by multiplying the average test percent bias of the split spinneret by a predetermined constant, so as to bring end to end variations in flow rate to within a required accuracy.
    Type: Grant
    Filed: September 19, 1974
    Date of Patent: January 6, 1976
    Assignee: Allied Chemical Corporation
    Inventors: William Bernard Fisher, Howard Lyle Helmer, David Pendlebury