Patents by Inventor David J. Korn

David J. Korn 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).

  • Patent number: 4726976
    Abstract: A composite substrate for use as a coversheet on disposable articles such as disposable diapers, sanitary napkins, disposable bed pads, nursing pads, finger dressings, and incontinent diapers, or the like. The cover sheet comprises an inner layer of polyethylene thermoplastic film secured to and between the inner surfaces of a top layer and a bottom layer of nonwoven polypropylene fibrous webs, by means of a pair of, one of which being a heated embossed roll applied to at least one of the outer surfaces of the fibrous web. The heat from the heated roll causes the film to melt in discrete areas forming apertures therein without substantially affecting the fibrous webs. As the film melts, it contacts fibers in the substantially unaffected adjacent fibrous web layers, causing the film and webs to be secured to each other at least at the peripheral edges of the discrete apertured areas, leaving a matrix of fibers covering the apertured areas.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: February 23, 1988
    Assignee: The Kendall Company
    Inventors: Hamzeh Karami, David J. Korn