Patents by Inventor Craig R. Lukhard

Craig R. Lukhard 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 deregistering multi-filament tow and product thereof
    Patent number: 5422180
    Abstract: A method and apparatus for deregistering drawn crimped nylon multifilament tow includes the steps of stretching the tow under constant controlled tension at a temperature below the glass transition temperature of the nylon. The apparatus includes means for sensing the tension of the tow between the feed and draw sections of a stretching device and producing a signal representative of the tension sensed and a controller for changing the speed of the draw section actuated by said signal.
    Type: Grant
    Filed: August 10, 1993
    Date of Patent: June 6, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Craig R. Lukhard, Jerry F. Potter, Maurice C. Todd
  • Apparatus and method for baling cut fibers and product
    Patent number: 5325770
    Abstract: A process for producing a bale of crimped staple fibers includes the repeated steps of cutting continuous filament crimped nylon tow into segments, maintaining the integrity of the segments while tramping charges of the segments under pressure to form a compacted layer, holding the layer to retain layer compaction and then pressing the layers and strapping the pressed layers.
    Type: Grant
    Filed: October 21, 1992
    Date of Patent: July 5, 1994
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Craig R. Lukhard, Elwood A. Roth, Maurice C. Todd
  • Apparatus and method for baling cut fibers and product
    Patent number: 5200269
    Abstract: A process for producing a bale of crimped staple fibers includes the repeated steps of cutting continuous filament crimped nylon tow into segments, maintaining the integrity of the segments while tramping charges of the segments under pressure to form a compacted layer, holding the layer to retain layer compaction and then pressing the layers and strapping the pressed layers.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: April 6, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Craig R. Lukhard, Elwood A. Roth, Maurice C. Todd
  • Method for deregistering crimped multifilament tow
    Patent number: 5110517
    Abstract: A method and apparatus for deregistering drawn crimped nylon multifilament tow includes the steps of stretching the tow under constant controlled tension at a temperature below the glass transition temperature of the nylon. The apparatus includes means for sensing the tension of the tow between the feed and draw sections of a stretching device and producing a signal representative of the tension sensed and a controller for changing the speed of the draw section actuated by said signal.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: May 5, 1992
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Craig R. Lukhard, Jerry F. Potter, Maurice C. Todd