Patents Assigned to Limited Resources, Inc.
  • Method for densifying a thermoplastic polymer
    Patent number: 5667746
    Abstract: A method and apparatus for densifying a thermoplastic polymer are disclosed. Particles of a thermoplastic polymer are introduced into a chamber, suspended with a fluid flow in the chamber, and while suspended, the particles are heated and softened to form pieces of densified thermoplastic polymer which are too dense to remain suspended in the fluid flow. The pieces of densified polymer are collected from the bottom of the chamber. A range of particle sizes can be efficiently and continuously densified without adjusting the apparatus.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: September 16, 1997
    Assignee: Limited Resources, Inc.
    Inventors: John Carl Goehner, Kenneth J. Goehner
  • Method and apparatus for densifying a thermoplastic polymer
    Patent number: 5565164
    Abstract: A method and apparatus for densifying a thermoplastic polymer are disclosed. Particles of a thermoplastic polymer are introduced into a chamber, suspended with a fluid flow in the chamber, and while suspended, the particles are heated and softened to form pieces of densified thermoplastic polymer which are too dense to remain suspended in the fluid flow. The pieces of densified polymer are collected from the bottom of the chamber. A range of particle sizes can be efficiently and continuously densified without adjusting the apparatus.
    Type: Grant
    Filed: March 17, 1995
    Date of Patent: October 15, 1996
    Assignee: Limited Resources, Inc.
    Inventors: John C. Goehner, Kenneth J. Goehner