Patents by Inventor Allen C. Bailey

Allen C. Bailey 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 controlling rotary extruder
    Patent number: 5045252
    Abstract: Method and apparatus for automatically controlling the operation of a rotary extruder, including using a pressure transducer (38, 40, 42) communicating with the annular space (50) between the barrel (12) and rotor (14) to monitor the hydraulic pressure of the melted polymer, using a microprocessor-based controller (62) to compare the measured pressure with a predetermined set point, and thereafter selectively controlling the speed of a feed drive motor (56) or melt drive motor (60) to maintain the melt pressure within a desired range while holding the extruder rotor speed constant.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: September 3, 1991
    Assignee: Permian Research Corporation
    Inventors: Granville J. Hahn, Allen C. Bailey, Richard D. Antrim