Patents by Inventor Ralf Preising

Ralf Preising 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: 6129305
    Abstract: Winding machine for continuous winding of a material web, in particular a paper or cardboard web, onto a reel into a winding roll, having a movable pressing drum, which forms a winding gap with the winding roll, having at least one primary transport device by means of which the reel can be moved along a first guide track, and at least one secondary transport device that guides the reel along a second guide track. To prepare for a reel change, the new reel can be shifted by the primary transport device into a reel-changing position in which a new winding gap is formed between the new reel and the pressing drum. In the reel-changing position, the material web is guided over a circumference region of the new reel.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: October 10, 2000
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventors: Roland Moller, Ralf Preising, Rudolf Beisswanger, Zygmunt Madrzak, Walter Kaipf
  • Patent number: 5988557
    Abstract: For winding up of a paper web to form a paper roll, a first reel spool is accelerated to the speed of the web and brought into a first, start-of-winding position in which it forms a nip with a driveable press drum. The beginning of the web of paper is guided around the press drum and is wound onto the first reel spool. When a first layer thickness has been wound, the first reel spool is transferred into a second, complete-winding position and the paper roll is wound up there to its desired layer thickness. During the entire winding process, the press drum or a special press roll are pressed against the winding surface of the developing paper roll, a torque is introduced into the axis of the first reel spool by means of a central drive and the press drum and/or press roll and the first reel spool with the developing paper roll thereon are displaced, preferably exclusively horizontally, without substantial changes in the direction or orientation of those elements.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: November 23, 1999
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventors: Roland Moller, Ralf Preising, Karl Ruck
  • Patent number: 5967449
    Abstract: A winder for continuous winding of a material web, like a paper or board web, on a winding spool to form a wound reel. A contact pressure drum is rotatably supported on a displaceable transport device and the drum itself is displaceable with respect to the transport device to form a widening nip with the wound reel. The transport device also supports a primary bearing for holding an empty spool during the start of the winding process. The bearing for the empty spool is between the contact pressure drum and a secondary bearing for supporting the wound reel in the final winding position. The primary bearing for the initially empty spool is fixed in location on a transport device. The transport device is in turn transportable toward and away from the secondary bearing for the wound reel. The contact pressure drum is supported to move along with the transport device as well as also being displaceable with respect to the transport device to maintain the line pressure during increase in the wound spool diameter.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: October 19, 1999
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventors: Roland Thomas, Ralf Preising, Roland Moeller
  • Patent number: 5895007
    Abstract: A method and device for winding a paper web to form a reel. The web is wound onto a shell that is predominantly centrally driven to introduce a torque that winds the web on the shell into a reel. A pressure element extends over the width of the web and acts continuously on the outer surface of the reel being wound in order to squeeze out air. A web threading roll comes adjacent the shell during web threading. Once the web is threaded, the shell is moved generally horizontally from the web threading toward the main winding position where the web is wound. A compensation device supports the reel being wound. The first pressure element in contact with the reel may move away, and a second pressure element closer to the compensation device may press upon the reel, after the first pressure element has moved away.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: April 20, 1999
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventors: Roland Moller, Ralf Preising, Karl Ruck, Christian Schiel