Patents by Inventor Peter H. Gray

Peter H. Gray 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).

  • Machine direction orientation of nylon film
    Patent number: 4477407
    Abstract: A process for machine direction orientation of nylon films in which nip rolls are applied to both the slow and fast orientation rolls with a substantially uniform force in the range of 15 to 45 N/cm width of nip roll. The temperature of the slow roll is held between 70.degree. and 180.degree. C. and the temperature of the fast roll is held between the temperature of the first roll and 20.degree. C. below the melting temperature of the nylon film. The distance between the orientation rolls is in the range of 10 to 2050 .mu.m.
    Type: Grant
    Filed: February 18, 1983
    Date of Patent: October 16, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Brian L. Hetherington, Peter H. Gray, Alistair N. Mollison