Patents by Inventor Richard J. Volungis

Richard J. Volungis 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).

  • Extrusion of wrinkle-free blown film from high modulus resin
    Patent number: 5207971
    Abstract: An improved blown-film extrusion process with particular application for high modulus thermoplastic resins. A cylinder is mounted above the cooling air ring. The film bubble passes through this cylinder, which has a diameter approximating the final diameter of the bubble. The frost line remains at or slightly higher than the top of the cylinder, leaving a small gap between the top of the cylinder bubble. The improvement enhances bubble cooling and stability and results in wrinkle-free film.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: May 4, 1993
    Assignee: Quantum Chemical Corporation
    Inventor: Richard J. Volungis