Patents by Inventor Raymond M. Ballard

Raymond M. Ballard 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).

  • Apparatus for winding film
    Patent number: 4850545
    Abstract: An apparatus for winding rolls of thin, wide film. High quality rolls free from circumferential ridges are wound by pressing a segmented bowed roll against a winding roll.
    Type: Grant
    Filed: December 8, 1983
    Date of Patent: July 25, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Raymond M. Ballard, Albert W. Forrest, Jr.
  • Film web winding assembly
    Patent number: 4193559
    Abstract: A web winding assembly of rolls is disclosed. The assembly includes a winding roll and a layon roll. The layon roll is of constant circumference with a flexible surface and is characterized by having an incompressible core, a volumetrically compressible resilient cushion element on the core, and a flexible, inextensible, outer covering on the cushion element. The winding assembly is used in film web handling operations to make windup packages of film web having improved surface hardness character and reduced tendency to telescope.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: March 18, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Raymond M. Ballard