Patents by Inventor Leo Wintrich

Leo Wintrich 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 device for the transverse drawing of a material web
    Patent number: 9180622
    Abstract: The invention relates to a method for the transverse drawing of an unoriented or longitudinally-oriented film web made from thermoplastic plastic. According to said method, an undrawn or longitudinally-drawn film (8) is introduced into a transverse drawing frame in which heater fields (1) are heated to a transverse drawing temperature TQ, in the attached drawing fields (2) a clip chain is drawn in the transverse direction by divergent (V-shaped) guides and a temperature TF is applied to fixing fields where TQ>TF. In the drawing fields and/or the heating fields (1) the boundary zones (5) of the film (8) are heated or thermally insulated such that the boundary zones (5) of the film (8) have a higher temperature than the middle of the film web (6) on transverse drawing and/or fixing.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: November 10, 2015
    Assignee: Treofan Germany GmbH & Co. KG
    Inventors: Leo Wintrich, Robert Hansohn
  • POLYPROPYLENE FILM COMPRISING AN OPENING AID
    Publication number: 20120187010
    Abstract: A biaxially oriented polypropylene film with at least two perforated lines is described, which run parallel to one another and are located at a maximum interval of 10 mm. The perforations of the two lines are offset relative to one another. The intervals of undamaged film between the perforations are longer than the perforations.
    Type: Application
    Filed: August 26, 2010
    Publication date: July 26, 2012
    Applicant: TREOFAN GERMANY GmbH & Co.KG
    Inventors: Angela Speith-Herfurth, Patrick Stuppi, Leo Wintrich, Joerg Steinbrecher, Markus Henne
  • POLYPROPYLENE FILM COMPRISING AN OPENING AID
    Publication number: 20120152773
    Abstract: A biaxially oriented polypropylene film with perforated lines is described. The film has at least two perforated lines which run parallel to one another and are located at a maximum interval of 10 mm. The perforations of the two lines are offset relative to one another.
    Type: Application
    Filed: August 26, 2010
    Publication date: June 21, 2012
    Applicant: TREOFAN GERMANY GMBH & CO. KG
    Inventors: Angela Speith-Herfurth, Patrick Stuppi, Leo Wintrich, Joerg Steinbrecher, Markus Henne
  • Method and Device for the Transverse Drawing of a Material Web
    Publication number: 20080157423
    Abstract: The invention relates to a method for the transverse drawing of an unoriented or longitudinally-oriented film web made from thermoplastic plastic. According to said method, an undrawn or longitudinally-drawn film (9) is introduced into a transverse drawing frame in which heater fields (1) are heated to a transverse drawing temperature TQ, in the attached drawing fields (2) a clip chain is drawn in the transverse direction by divergent (V-shaped) guides and a temperature TF is applied to fixing fields where TQ>TF. In the drawing fields and/or the heating fields (1) the boundary zones (5) of the film (8) are heated or thermally insulated such that the boundary zones (5) of the film (8) have a higher temperature than the middle of the film web (6) on transverse drawing and/or fixing.
    Type: Application
    Filed: May 9, 2006
    Publication date: July 3, 2008
    Applicant: Treofan Germany GmbH & Co. KG
    Inventors: Leo Wintrich, Robert Hansohn