Patents by Inventor Mark A. Wegenka

Mark A. Wegenka 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).

  • Apparatus for forming starting tail for film rolls
    Patent number: 4243366
    Abstract: A method of affecting the tail end of a roll of plastic film to render it readily identifiable and easy to grasp and start without tearing the film web into strips. The tail end of the film is embossed on-line as it is separated and about to be wound up on a roll core. The method is accomplished by securing the tail end between a heated surface on the upstream side of a knife on a cut-off roll and a lifting and embossment mechanism to provide a wide embossment across the tail end of the film at about the time it is severed from the film stock. The method produces a novel puckered tail, particularly for highly oriented films where tension is relieved while the tail end is still heated.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: January 6, 1981
    Assignee: The Dow Chemical Company
    Inventors: Lloyd E. Lefevre, Mark A. Wegenka
  • Starting tail for film rolls
    Patent number: 4241127
    Abstract: A method of affecting the tail end of a roll of plastic film to render it readily identifiable and easy to grasp and start without tearing the film web into strips. The tail end of the film is embossed on-line as it is separated and about to be wound up on a roll core. The method is accomplished by securing the tail end between a heated surface on the upstream side of a knife on a cut-off roll and a lifting and embossment mechanism to provide a wide embossment across the tail end of the film at about the time it is severed from the film stock. The method produces a novel puckered tail, particularly for highly oriented films where tension is relieved while the tail end is still heated.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: December 23, 1980
    Assignee: The Dow Chemical Company
    Inventors: Lloyd E. Lefevre, Mark A. Wegenka
  • Method of forming starting tails for film rolls
    Patent number: 4169122
    Abstract: A method of affecting the tail end of a roll of plastic film to render it readily identifiable and easy to grasp and start without tearing the film web into strips. The tail end of the film is embossed on-line as it is separated and about to be wound up on a roll core. The method is accomplished by securing the tail end between a heated surface on the upstream side of a knife on a cut-off roll and a lifting and embossment mechanism to provide a wide embossment across the tail end of the film at about the time it is severed from the film stock. The method produces a novel puckered tail, particularly for highly oriented films where tension is relieved while the tail end is still heated.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: September 25, 1979
    Assignee: The Dow Chemical Company
    Inventors: Lloyd E. Lefevre, Mark A. Wegenka