Patents by Inventor Herbert J. Wenz, Jr.

Herbert J. Wenz, Jr. 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).

  • Side-by-side co-extrusion of film using multiple materials
    Patent number: 4731004
    Abstract: A film of uniform thickness is formed by two or more materials (A, B, etc.) extruded side-by-side with their common edge joined and co-mingled to form a single piece film. The film is preferably formed in a conventional slot die by use of a barrier dividing the entry manifold into two passages so that the materials co-mingle downstream of the barrier at their common edge. In one application, the film can be extruded partially clear and partially opaque to form a bread wrapper.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: March 15, 1988
    Assignee: Princeton Packaging, Inc.
    Inventor: Herbert J. Wenz, Jr.