Patents by Inventor W. Mark Kirkpatrick

W. Mark Kirkpatrick 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 contact winding
    Patent number: 5288033
    Abstract: A lay-on roll exerts a nip force against a roll of film winding upon a core. The lay-on roll is rotatably supported by a carriage capable of moving away from the center of the core as the wound roll of film increases in diameter. The carriage is connected to a linear bearing attached to a piston/cylinder assembly for continuously moving the carriage along a straight path colinear with a line connecting the center of the lay-on roll and the center of the core while maintaining a substantially constant nip force.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: February 22, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: W. Mark Kirkpatrick