Patents by Inventor Wilhelm Waldbauer, deceased

Wilhelm Waldbauer, deceased 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 producing glued folded boxes
    Patent number: RE30325
    Abstract: A method and an apparatus for forming the bottom part or cover part of a folded box by means of a plunger which presses a precut blank, the edge portions of which are coated with a liquid adhesive, into a female mold, and wherein means are provided for preventing the marginal strips of the blank which are coated with adhesive from coming in contact with the plunger when the blank is being pressed into and retracted from the mold.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: July 8, 1980
    Assignee: Hoague-Sprague Leasing Company, Inc.
    Inventor: Wilhelm Waldbauer, deceased