Patents by Inventor Robert Joseph Vandor

Robert Joseph Vandor 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 of embossing foam polystyrene to prevent warping upon removal from mold
    Patent number: 4053549
    Abstract: A method is provided for thermoforming thermoplastic foam articles whereby the tendency for such articles to deform and/or warp immediately upon release from the thermoforming device is eliminated. The method includes the formation of parallel or concentric grooves on one surface of the article during the course of the thermoforming operation. Such grooves eliminate the pronounced tendency of thermoformed articles to curl up following their removal from the thermoforming mold and maintains the formed piece in the desired flat configuration.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: October 11, 1977
    Assignee: Mobil Oil Corporation
    Inventor: Robert Joseph Vandor