Patents by Inventor Michael Demura

Michael Demura 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).

  • Air separation method and apparatus for pleating a plastic film web
    Patent number: 5246416
    Abstract: An apparatus and method for introducing a pleat into an advancing folded-over film web is provided which utilizes air under low pressure to separate the opposing faces of the web prior to the pleat being made. By unblocking the faces of the folded-over web, the web may be readily advanced and pleated without hang ups, misalignment, or tearing of the web. The apparatus includes a pair of substantially aligned and spaced-apart receiving plates over which opposing faces of the film web pass, a generally circular wheel positioned between the receiving plates and extending into the space therebetween for forming a pleat in the folded-over film, and an air passage positioned between the receiving plates for directing a flow of air between the opposing faces of the film web to separate the opposing faces of the web prior to passing over the receiving plates.
    Type: Grant
    Filed: August 10, 1992
    Date of Patent: September 21, 1993
    Assignee: Dowbrands L.P.
    Inventors: Michael Demura, James LaCombe, Roger A. Novak, Raymond D. Barta
  • Air separation method and apparatus for pleating a plastic film web
    Patent number: 5147278
    Abstract: An apparatus and method for introducing a pleat into an advancing folded-over film web is provided which utilizes air under low pressure to separate the opposing faces of the web prior to the pleat being made. By unblocking the faces of the folded-over web, the web may be readily advanced and pleated without hang ups, misalignment, or tearing of the web. The apparatus includes a pair of substantially aligned and spaced-apart receiving plates over which opposing faces of the film web pass, a generally circular wheel positioned between the receiving plates and extending into the space therebetween for forming a pleat in the folded-over film, and an air passage positioned between the receiving plates for directing a flow of air between the opposing faces of the film web to separate the opposing faces of the web prior to passing over the receiving plates.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: September 15, 1992
    Assignee: DowBrands L.P.
    Inventors: Michael Demura, James LaCombe, Roger A. Novak, Raymond D. Barta