Patents by Inventor Albert White Forrest, Jr.

Albert White Forrest, Jr. 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).

  • Hybrid magnetically supported carriage transporter
    Patent number: 6601519
    Abstract: A carriage transporting apparatus is capable of transporting one or more carriages along a track, substantially free of mechanical friction or magnetic drag, by magnetically supporting the carriages in a first direction and by stabilizing the position of the carriages in a second direction by passive means.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: August 5, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: William Bindloss, Jr., Andris Suna, Albert White Forrest, Jr.
  • Process for preparing dimensionally stabilized biaxially stretched thermoplastic film
    Patent number: 5885501
    Abstract: An improved process for preparing a biaxially stretched thermoplastic film, such as polyethylene naphthalate (PEN) or polyethylene terephthalate (PET) film, having low thermal shrinkages by simultaneous biaxial stretching of the film in a tenter frame using linear electrical motors to drive the tenter clips. The film is relaxed in the machine direction (MD) and the transverse direction (TD) by converging the paths of the tenter clips and decelerating the tenter clips during heat-setting to provide film having tailored levels of MD and TD shrinkages.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: March 23, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Donna Kristine Gardner, Karl Paul Paoletti, Ramesh Mohanlal Gohil, Albert White Forrest, Jr.
  • Tenter clip cleaning method and apparatus
    Patent number: 5771547
    Abstract: A method and apparatus is disclosed for ejecting a loose film edge from a film stretching clip by directing a jet of fluid such as air through a channel in the clip and between adjacent clips at or before release of a film from the clip and also after release of the film.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: June 30, 1998
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: William John Hommes, Albert White Forrest, Jr., Paul G. Jennings
  • Film bead heating for simultaneous stretching
    Patent number: 5753172
    Abstract: An improved process for simultaneous biaxial stretching of a thermoplastic polymer film having beaded edges in a tenter frame consisting of gripping the beaded edges of the film with tenter clips and increasing the temperature of the beaded edges to within the film orientation temperature range prior to or during simultaneous stretching, and in subsequent stretching or heat-setting steps, by focusing heat on the beaded edges of the film. Thermoplastic films, such as polyethylene terephthalate and polyethylene naphthalate, having a final thickness of from 0.2 to 350 microns after simultaneous stretching can be prepared.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: May 19, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Albert White Forrest, Jr., David Edward Heyer, Charles Nelson Jolliffe