Patents by Inventor Michael A. David

Michael A. David 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).

  • Patent number: 6548572
    Abstract: This invention relates to non-aqueous coating and ink formulations for use on flexible film or paper packages for food, which require aseptic packaging conditions. The printed and coated packaging materials, and methods of aseptic packaging, as well as the aseptic packages are also disclosed. The coating formulation comprises the following components: 1) a mixing varnish comprising a phenolic-modified co-solvent-type polyamide resin, 2) a nitrocellulose compound varnish, 3) a non-aqueous solvent mixture, and 4) specialty additives, and wherein all components present in the formulation are stable in the presence of an oxidizing agent.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: April 15, 2003
    Assignees: DuPont Canada Inc., Sun Chemical Limited
    Inventors: Alan Keith Breck, Michael A. Davids
  • Patent number: 6421939
    Abstract: A carpet seaming iron is provided for heating adhesive seaming tape without direct contact to the adhesive. The carpet seaming iron has an outer housing forming a cavity therein and a handle with an open end leading to a passageway to the cavity. A heating element is located within the cavity and spaced from a lower base plate. The base plate has apertures therethrough. An electrically operated fan is disposed in the cavity, between the open end of the handle and the heating element. The fan draws ambient atmospheric air through the open end and directs the air past the heating element and through the apertures in the base plate toward the adhesive seaming tape. The air is heated by the heating element so that the air melts the adhesive. The base plate is attached to rollers or ski devices to space the base plate from the adhesive tape.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: July 23, 2002
    Inventors: Michael A. David, Christopher T. Steinhelper