Patents by Inventor Stephen Olney Cook

Stephen Olney Cook 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 forming tubular multilaminate plastic film
    Patent number: 4042661
    Abstract: Tubular multilaminate film having four or more layers can be made byA. combining two or more streams of dissimilar resins to form a first stream of parallel layers of the resins and feeding the stream into a first annular space wherein the stream divides into two substreams which flow laterally in opposite directions about the axis of the space and then join to form a first annular stream in which the layers are coaxial,B. combining two or more other streams of resins to form a second stream of parallel resin layers and feeding the stream into a second annular space which is concentric with the first annular space and wherein the second stream divides into two substreams which flow laterally in opposite directions about the axis of the space and then join to form a second annular stream in which the layers are coaxial, andC. combining the first and second annular streams to form a composite annular stream, andD.
    Type: Grant
    Filed: January 23, 1976
    Date of Patent: August 16, 1977
    Assignee: Crown Zellerbach Corporation
    Inventor: Stephen Olney Cook