Patents by Inventor Darrel H. Cummings

Darrel H. Cummings 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).

  • Methods and systems for controlling printhead temperature in solid freeform fabrication
    Patent number: 7306758
    Abstract: A solid freeform fabrication system including a three-dimensional fabricator with a plurality of pens and a controller configured to evaluate pen information and to control the pens to reduce a temperature of the pens.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: December 11, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey A Nielsen, Stephen A. Loughran, Steven T Castle, Darrel H. Cummings
  • Fusible water-soluble films for fabricating three-dimensional objects
    Patent number: 6966960
    Abstract: A material for use in fabricating three-dimensional objects includes a mixture of thermoplastic particles and a water-soluble polymer matrix formed as a film that is fusible into a non-water soluble state when exposed to heating. The film further includes a surfactant system bound to the thermoplastic particles, the surfactant system providing an inversion property such that the thermoplastic particles are hydrophilic but, upon a fusing of the film, become hydrophobic as the surfactant become incorporated into the bulk.
    Type: Grant
    Filed: May 7, 2003
    Date of Patent: November 22, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Melissa D. Boyd, Darrel H. Cummings, Laura Kramer
  • Fusible water-soluble films for fabricating three-dimensional objects
    Publication number: 20040224173
    Abstract: A material for use in fabricating three-dimensional objects includes a mixture of thermoplastic particles and a water-soluble polymer matrix formed as a film that is fusible into a non-water soluble state when exposed to heating. The film further includes a surfactant system bound to the thermoplastic particles, the surfactant system providing an inversion property such that the thermoplastic particles are hydrophilic but, upon a fusing of the film, become hydrophobic as the surfactant become incorporated into the bulk.
    Type: Application
    Filed: May 7, 2003
    Publication date: November 11, 2004
    Inventors: Melissa D. Boyd, Darrel H. Cummings, Laura Kramer
  • Methods and systems for controlling printhead temperature in solid freeform fabrication
    Publication number: 20040178531
    Abstract: A solid freeform fabrication system including a three-dimensional fabricator with a plurality of pens and a controller configured to evaluate pen information and to control the pens to reduce a temperature of the pens.
    Type: Application
    Filed: March 13, 2003
    Publication date: September 16, 2004
    Inventors: Jeffrey Allen Nielsen, Stephen A. Loughran, Steven T. Castle, Darrel H. Cummings