Patents by Inventor John Farago

John Farago 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).

  • Solution flow splitting for improved sheet uniformity
    Patent number: 5116549
    Abstract: A method for splitting the flow of a spin solution in a standard flash spinning process to increase sheet uniformity at increased flow rates. In one embodiment, the apparatus comprises a coarse mesh screen that is positioned within the pressure let-down zone of the spinneret assembly. The screen divides the solution flow into numerous individual sheet uniformity compared to sheets formed without the screen and at the same flow rate. The method produces nonwoven sheets having less ropiness and improved uniformity at relatively high solution flow rates.
    Type: Grant
    Filed: January 2, 1991
    Date of Patent: May 26, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John Farago
  • Nonwoven fiber-sheet process
    Patent number: 4537733
    Abstract: A process is provided for reducing the size and number of undesirable gauge bands in wound-up rolls of wide nonwoven sheet that is produced by a plurality of oscillating fiber streams depositing fiber on a moving receiver. The desired effect is accomplished by varying the oscillation frequency of the fiber streams by more than .+-.5% of the average oscillation frequency.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: August 27, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John Farago