Patents by Inventor Albrecht Freynhofer

Albrecht Freynhofer 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: 7596839
    Abstract: The invention relates to a device for drawing a film web, made from a thermoplastic plastic, comprising at least one driven roller (2), driven at a speed V1 and at least one second driven roller (3), driven at a speed V2, where V1<V2. The rollers (2, 3) are serially arranged such that a drawing gap (4) is embodied between the two rollers (2, 3). A width-maintaining device is arranged in the drawing gap (4), which mechanically grips both edges of the film web such that the width of the film web is essentially maintained during the longitudinal drawing in the drawing gap (4). The invention further relates to a method for the longitudinal drawing of films which are drawn by means of said device.
    Type: Grant
    Filed: January 17, 2005
    Date of Patent: October 6, 2009
    Assignee: Treofan Germany GmbH & Co. KG
    Inventors: Detlef Busch, Albrecht Freynhofer, Gerhard Koch, Michael Thull
  • Publication number: 20070157436
    Abstract: The invention relates to a device for drawing a film web, made from a thermoplastic plastic, comprising at least one driven roller (2), driven at a speed V1 and at least one second driven roller (3), driven at a speed V2, where V1<V2. The rollers (2, 3) are serially arranged such that a drawing gap (4) is embodied between the two rollers (2, 3). A width-maintaining device is arranged in the drawing gap (4), which mechanically grips both edges of the film web such that the width of the film web is essentially maintained during the longitudinal drawing in the drawing gap (4). The invention further relates to a method for the longitudinal drawing of films which are drawn by means of said device.
    Type: Application
    Filed: January 17, 2005
    Publication date: July 12, 2007
    Applicant: Treofan Germany GmbH & Co., KG
    Inventors: Detlef Busch, Albrecht Freynhofer, Gerhard Koch, Michael Thull
  • Patent number: 6799961
    Abstract: The application relates to a device for adjusting the gap of a die arrangement using a thermopin, which is connected to the die lip (10) without any play by means of a clamp-type socket (7), where the clamp-type socket (7) engages on the one had in a lip nose (11) and on the other hand in a groove (5) of the thermopin (1), where the lip nose (11) is an integral part of the die lip (10) and the clamp-type socket (7) has a bore (8), and the thermopin (1) has a bore (4) and a fixing means is passed through the bores (8) and (4).
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: October 5, 2004
    Assignee: Trespaphan GmbH
    Inventors: Albrecht Freynhofer, Helmut Kremp, Dieter Mathieu, Wolfgang Rasp
  • Patent number: 5865472
    Abstract: A compensator 11 comprises a housing 14 and a sliding ram 13, which is displaceable along a sliding seat 17. The sliding ram 13 includes a flow channel portion 21, which transitions into an elbow bend 30, which, in the operating state, i.e., when hot polymer melt flows through the compensator, is congruent with a further flow channel portion 20. The two flow channel portions 20, 21 have flanges 28 and 29 at their end faces for the installation of the compensator 11 at a bend in a melt line through which a polymer felt flows, to compensate for linear expansions of the melt line due to the increased temperature.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: February 2, 1999
    Assignee: Hoechst Trespaphan GmbH
    Inventor: Albrecht Freynhofer