Patents by Inventor Edward M. Rothenberg

Edward M. Rothenberg 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 coating thermoplastic film
    Patent number: 4248576
    Abstract: A method and an apparatus for effecting in a continuous manner the three operations of extruding, biaxially stretching and surface coating a seamless tubing of thermoplastic resin such as polyethylene, polypropylene, polyethylene terephthalate, etc. The coating material in a molten state is applied to the tubing while a formative state and prior stretching. A coated film is obtained which is dimensionally stable and is useful for food packaging.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: February 3, 1981
    Assignee: Canadian Industries Limited
    Inventors: Aleck M. Birks, Michael I. Haluk, Edward M. Rothenberg