Patents by Inventor William Mark Dutt

William Mark Dutt 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 making reclosable plastic bags using a pre-applied slider-operated fastener
    Patent number: 7093409
    Abstract: A method and apparatus for making reclosable plastic bags is provided. In the method and apparatus, a fastener is attached to a moving flat web of plastic film, preferably in the direction of web movement and near the center of the web. A plurality of sliders are mounted to the fastener either before or after the fastener is attached to the flat web, but prior to conveying the web to a FFS machine. The flat web, with the slider-operated fastener already attached thereto, is then conveyed to a vertical or horizontal FFS machine where the flat web is formed into bags, and the bags are successively filled and sealed.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: August 22, 2006
    Assignee: Pactiv Corporation
    Inventors: William Mark Dutt, Toby R. Thomas
  • Method and apparatus for making reclosable plastic bags using a pre-applied slider-operated fastener
    Patent number: 6871473
    Abstract: A method and apparatus for making reclosable plastic bags is provided. In the method and apparatus, a fastener is attached to a moving flat web of plastic film, preferably in the direction of web movement and near the center of the web. A plurality of sliders are mounted to the fastener either before or after the fastener is attached to the flat web, but prior to conveying the web to a FFS machine. The flat web, with the slider-operated fastener already attached thereto, is then conveyed to a vertical or horizontal FFS machine where the flat web is formed into bags, and the bags are successively filled and sealed.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: March 29, 2005
    Assignee: Pactiv Corporation
    Inventors: William Mark Dutt, Toby R. Thomas