Patents by Inventor Ralf Ohrndorf

Ralf Ohrndorf 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: 8230711
    Abstract: A rolling mill (1) for rolling a metal workpiece (2) that is provided with at least one roll stand (3) as well as with a conveyor (4) for the material to be rolled (2) extending on both sides of the roll stand (3) for a predetermined length (L) is based on the object that in the area of the longitudinal extent of the conveyor (4) at least one holder (5) for a coil (6) of the metal workpiece (2) is provided that can be positioned in a first position (A) in which it does not disturb the transport of the metal workpiece (2) along the conveyor (4) and that can be positioned in a second position (B) in which the coil (6) is positioned close to the roll stand (3) on the conveyor (4) for unwinding or winding up the coil (6).
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: July 31, 2012
    Assignee: SMS Siemag Aktiengesellschaft
    Inventors: Armin Klapdor, Ralf Ohrndorf
  • Patent number: 7434435
    Abstract: The invention relates to a method and a device for applying an adjustable tensile-stress distribution, in particular in the edge regions during the cold-rolling of metal strips (16), in particular metal foil, in order to reduce the risk of an excessive build-up of tension and cracks at the edges of the strip, which can lead as a negative consequence to cracks in the strip and to a reduction in production, and in order to improve the surface of the strip and its planarity, even for a relatively high strip displacement speed, and also to reduce strip trimming widths.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: October 14, 2008
    Assignee: SMS Demag AG
    Inventors: Hans-Peter Richter, Hartmut Pawelski, Ludwig Weingarten, Thorsten Bode, Jürgen Klöckner, Ralf Ohrndorf
  • Publication number: 20080209970
    Abstract: A rolling mill (1) for rolling a metal workpiece (2) that is provided with at least one roll stand (3) as well as with a conveyor (4) for the material to be rolled (2) extending on both sides of the roll stand (3) for a predetermined length (L) is based on the object that in the area of the longitudinal extent of the conveyor (4) at least one holder (5) for a coil (6) of the metal workpiece (2) is provided that can be positioned in a first position (A) in which it does not disturb the transport of the metal workpiece (2) along the conveyor (4) and that can be positioned in a second position (B) in which the coil (6) is positioned close to the roll stand (3) on the conveyor (4) for unwinding or winding up the coil (6).
    Type: Application
    Filed: June 21, 2005
    Publication date: September 4, 2008
    Applicant: SMS DEMAG AKTIENGESELLSCHAFT
    Inventors: Arim Klapdor, Ralf Ohrndorf
  • Publication number: 20070186609
    Abstract: The invention relates to a method and a device for applying an adjustable tensile-stress distribution, in particular in the edge regions during the cold-rolling of metal strips (16), in particular metal foil, in order to reduce the risk of an excessive build-up of tension and cracks at the edges of the strip, which can lead as a negative consequence to cracks in the strip and to a reduction in production, and in order to improve the surface of the strip and its planarity, even for a relatively high strip displacement speed, and also to reduce strip trimming widths.
    Type: Application
    Filed: August 27, 2004
    Publication date: August 16, 2007
    Inventors: Hans-Peter Richter, Hartmut Pawelski, Ludwig Weingarten, Thorsten Bode, Jurgen Klockner, Ralf Ohrndorf
  • Patent number: 5056748
    Abstract: A molded plastic holder for printed material includes a substantially flat support panel which is designed to be mounted to any vertical surface. Molded as part of and integrally joined to the support panel along a lower edge is a first curved clip which curves outwardly at its base so as to provide a clearance space to receive the material and then extends inwardly in order to create a pressure point which presses against any material placed in the holder in order to retain the material securely in place. Also molded as part of and integrally joined to the support panel is a second curved clip of virtually identical construction to the first curved clip. The clips each have an inherent spring tension which allows each clip to be easily pulled forward for the insertion of material into the holder and to spring back to apply the desired holding force. Snap-on legs are used when the holder is to be table-mounted.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: October 15, 1991
    Assignee: Deflecto Corporation
    Inventor: Stephen T. Meyer