Patents by Inventor Hans-Rolf Conrad

Hans-Rolf Conrad 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).

  • Publication number: 20070057019
    Abstract: A heatable roll having a smooth, hard surface for the production and/or treatment of a fibrous web, in particular a paper, board or tissue web, comprises a base tube made of weldable steel, to which at least one welded layer which has a higher hardness than the base tube is applied. Moreover, a process for the production of such a roll is described.
    Type: Application
    Filed: August 22, 2006
    Publication date: March 15, 2007
    Applicant: VOITH PAPER PATENT GMBH
    Inventors: Thomas Baumeister, Peter Wiemer, Hans-Rolf Conrad, Ralf Beckers, Christian Loeffler, Jochen Autrata, Heiko Linder, Olaf Dries, Andreas Essling, Franz-Josef Michelkens
  • Patent number: 7045037
    Abstract: Process for cleaning at least one roll of a calender. The process includes guiding a web over a surface of the at least one roll of the calender to be cleaned, and producing a relative speed difference between the surface of the least one roll and a section of the web lying against the surface of the a least one roll. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: May 16, 2006
    Assignee: Voith Paper Patent GmbH
    Inventor: Hans-Rolf Conrad
  • Patent number: 6705216
    Abstract: Calender including at least one roll stack having a plurality of rolls arranged to form at least one nip, a stand arrangement having a stand located at each axial end of the at least one roll stack, and antifriction bearings arranged to support the plurality of rolls on the stand arrangement. Each stand includes a bearing edge on which the antifriction bearings are arranged, a contact edge structured and arranged to contact a mounting surface, and a connecting edge forming a connection between the bearing edge and the contact edge. Each stand further includes a plate structured and arranged to include the bearing edge, the contact edge and the connecting edge to one another.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: March 16, 2004
    Assignee: Voith Paper Patent GmbH
    Inventor: Hans-Rolf Conrad
  • Publication number: 20040035536
    Abstract: Process for cleaning at least one roll of a calender. The process includes guiding a web over a surface of the at least one roll of the calender to be cleaned, and producing a relative speed difference between the surface of the least one roll and a section of the web lying against the surface of the a least one roll. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Application
    Filed: August 8, 2003
    Publication date: February 26, 2004
    Applicant: Voith Paper Patent GmbH
    Inventor: Hans-Rolf Conrad
  • Patent number: 6616809
    Abstract: Process and apparatus for producing paper reels from a paper web. The process includes calendering the paper web, longitudinally cutting the paper web into partial webs, and winding the partial webs into paper reels. The calendering, longitudinal cutting, and winding occur on-line and without intermediate winding. The apparatus includes a paper machine, a calender, a longitudinal cutting device, and a reel winding device. The paper machine, the calender, the longitudinal cutting device, and the reel winding device are successively arranged in a web run direction.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: September 9, 2003
    Assignee: Voith Paper Patent GmbH
    Inventors: Hans-Rolf Conrad, Dirk Cramer
  • Publication number: 20030024413
    Abstract: Calender including at least one roll stack having a plurality of rolls arranged to form at least one nip, a stand arrangement having a stand located at each axial end of the at least one roll stack, and antifriction bearings arranged to support the plurality of rolls on the stand arrangement. Each stand includes a bearing edge on which the antifriction bearings are arranged, a contact edge structured and arranged to contact a mounting surface, and a connecting edge forming a connection between the bearing edge and the contact edge. Each stand further includes a plate structured and arranged to include the bearing edge, the contact edge and the connecting edge to one another.
    Type: Application
    Filed: May 31, 2002
    Publication date: February 6, 2003
    Applicant: VOITH PAPER PATENT GmbH
    Inventor: Hans-Rolf Conrad
  • Publication number: 20020060001
    Abstract: Process and apparatus for producing paper reels from a paper web. The process includes calendering the paper web, longitudinally cutting the paper web into partial webs, and winding the partial webs into paper reels. The calendering, longitudinal cutting, and winding occur on-line and without intermediate winding. The apparatus includes a paper machine, a calender, a longitudinal cutting device, and a reel winding device. The paper machine, the calender, the longitudinal cutting device, and the reel winding device are successively arranged in a web run direction.
    Type: Application
    Filed: July 25, 2001
    Publication date: May 23, 2002
    Applicant: VOITH PAPER PATENT GmbH
    Inventors: Hans-Rolf Conrad, Dirk Cramer
  • Patent number: 6250582
    Abstract: Roll winding device and method. The roll winding device has two carrying rollers defining a winding bed adapted to receive a wound roll. Each roller has a respective longitudinal axis, the longitudinal axes being substantially parallel to one another. The device includes a pressure chamber arrangement having opposed sides, opposed ends and a bottom, each side being defined by a respective carrying roller, the bottom being defined by a sealing body, and an end wall present at each opposed end. At least one end wall is a mobile end wall that is adapted to move along an an axis substantially parallel to the longitudinal axes of the carrying rollers. Also provided is a roll winding method for use with a roll winding device.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: June 26, 2001
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventors: Hans-Rolf Conrad, Josef Kohnen
  • Patent number: 6230615
    Abstract: Calender for the treatment of a paper web including a roll stack of at least three rolls and with least one double-soft nip. The double-soft nip(s) are formed by two rolls, each with an elastic surface layer. At least one of the rolls forming the double-soft nip is heated. In a process using the calendar to treat a material web, the web is introduced into a roll stack having at least two rolls formed with an elastic surface layer over a rigid core, agglomerated in an elastic double-soft nip between the two rolls, heated to introduce energy into the material web and promote agglomerating, and smoothed in the elastic double-soft nip.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: May 15, 2001
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventors: Lothar Zimmermann, Hans-Rolf Conrad
  • Patent number: 6209817
    Abstract: Method and apparatus for monitoring a winding hardness of a winding roll when winding a material web. A series of marks are placed on the material web at a first location as it is wound onto the winding roll. The distance between two successive marks is detected at a second location. The detected distance of two successive marks is used to determine a stretch of the material web.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: April 3, 2001
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventors: Hans-Rolf Conrad, Dirk Cramer
  • Patent number: 5784955
    Abstract: A calender has at least four rollers that are located one above the other. The rollers rotate about roller bearings. The calender is located within a paper-making machine. Each of the rollers is rotatably driven by an independent driving mechanism. At least two of the rollers are heatable. At least 40% of the rollers are soft rollers. The outer coverings of the soft rollers are made of a synthetic material that is not sensitive to marking so that a doctor blade can be applied to the soft rollers. The calender includes a device that inserts a paper guide strip into the calender.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: July 28, 1998
    Assignee: Voith Sulzer Finishing GmbH
    Inventor: Hans-Rolf Conrad
  • Patent number: 5706631
    Abstract: A method and device for packaging a roll formed by a wound web of material. The roll has a first axial end and a second axial end. The method includes the steps of (1) wrapping the roll with a web of packaging material; (2) forming an axial projecting length at each axial end of the packaging material; (3) placing an end cover against each axial end of the roll at a predetermined angle with respect to the axial end of the roll; and (4) folding each axial projecting length in onto the respective axial end of the roll thereby causing each end cover to move into contact with the respective axial end of the roll. The device includes a winding device that has a dispenser for the web of packaging material, a roller drive and a folding device to fold an axial projecting length of a web of packaging material onto at least one of the axial ends of the roll. An end cover feed device is disposed adjacent to the at least one of the axial ends of the roll.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: January 13, 1998
    Assignee: Voith Sulzer Finishing GmbH
    Inventor: Hans-Rolf Conrad
  • Patent number: 5685955
    Abstract: A method and apparatus for processing a longitudinally traveling web of material using a sheet treating device positioned in a transverse direction relative to the web. The sheet treating device having a plurality of individually controllable zones for controlling a target parameter of the web, for example, the thickness, bulk, dampness, smoothness or sheen of the web. In conjunction with the sheetmaking device, a measuring instrument for measuring an actual value of the target parameter is placed downstream of the sheet treating device. An actual profile that is determined by the actual values is compared with a desired profile, and the zones of the sheet treating device are adjusted such that the discrepancies between the two profiles are minimized. To improve the matching of the actual profile to the desired profile even further, the web and/or the sheet treating device are shifted relative to the other in the transverse direction to minimize the discrepancies between the two profiles.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: November 11, 1997
    Assignee: Voith Sulzer Finishing GmbH
    Inventors: Reinhard Leigraf, Hans-Rolf Conrad
  • Patent number: 5655442
    Abstract: A calender having one stack of rollers has a working nip formed between a hard roller and a soft roller. A changeover nip is formed between adjacent soft rollers. The changeover nip is arranged approximately in the center of the roller stack. The cumulative weight of the rollers is such that the sum of the loads per unit of length of the working nips disposed above the changeover nip is at least 80 percent of the sum of the loads per unit of length of the working nips disposed below the changeover nip.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: August 12, 1997
    Assignee: Voith Sulzer Finishing GmbH
    Inventors: Hans-Rolf Conrad, Franz Kayser
  • Patent number: 5647555
    Abstract: A winding device for supporting a winding roller for web material, in particular, for paper, has a supporting arrangement which works from underneath in opposition to a deflection of the winding roller and which creates a compressed air cushion between the supporting arrangement and the winding roller. The air cushion is created by means of an over-pressure in a space between the support rollers that are placed underneath the winding roller. However, due to the changing winding radius, the sealing at the ends of the winding space is difficult to maintain.
    Type: Grant
    Filed: July 20, 1995
    Date of Patent: July 15, 1997
    Assignee: Voith Sulzer Finishing GmbH
    Inventors: Hans-Rolf Conrad, Dieter Junk
  • Patent number: 5619807
    Abstract: A method and apparatus for processing a web of material, which is dispensed from a roll and fed through at least one roller gap of a roller-gap system which includes a processing station, an unrolling station on the input side of the processing station, and a roll magazine on the input side of the unrolling station which magazine includes at least one roll storage position. When rolls of web material are processed, the processing delay times lead to an uneven distribution of the temperature and/or moisture within the roll which in turn causes nonuniformity of the results in the processing station. The web of material still on the roll is exposed, prior to being unrolled, to a preselected atmospheric environment for a predetermined minimum length of time. Accordingly, the roll storage position is located in a chamber, the atmosphere of which can be controlled to a preset temperature and/or humidity level.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: April 15, 1997
    Assignee: Voith Sulzer Finishing GmbH
    Inventor: Hans-Rolf Conrad
  • Patent number: 5613307
    Abstract: A jacket with a thermally insulating layer partially surrounds, at a small spacing, a heatable roll which serves for the treatment of webs of material, in particular paper webs. Under production conditions the jacket reduces heat losses from the roll through convection and radiation to the environment. The jacket has a device which, with an interruption of production, ensures a forced convection at the heated roll for the cooling of the surface to a temperature level which is same or only insubstantially higher than in the production state. Several cooling nozzles are conceivable for the said apparatus which are secured to the jacket and direct a coolant onto the roll surface.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: March 25, 1997
    Assignee: Voith Sulzer Finishing GmbH
    Inventors: Hans-Rolf Conrad, Dirk Cramer
  • Patent number: 5477659
    Abstract: A method and an arrangement for the packaging of a material-web roll, includes the roll being surrounded on all sides by packaging material. The packaging material is closed by a pleating device for the pleating of the axial projections of the packaging material on the end faces of the roll. A device for applying the outer end face covers is also included. When packaging the roll, air is enclosed within the package which often results in a bursting of the package when the roll is being deposited on one of its end faces. To avoid this bursting, a portion of the air mass is removed from the interior of the packaging material and after closing the package, the volume of the still enclosed air is being reduced by the provision of a heating device for heating at least a portion of the air volume being enclosed by the packaging.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: December 26, 1995
    Assignee: Sulzer Papertec Krefeld GmbH
    Inventors: Hans-Rolf Conrad, Franz Kayser
  • Patent number: 5439366
    Abstract: A safety device for the roll space within a calender or other roll machine is disclosed. The rolls when rotating, excite oscillations in the beam at the resonant frequency of the beam. This can occur during start-up or during normal operation. The safety device of the present invention comprises a beam and additional mass that is oscillatorily suspended from the beam in order to reduce the amplitude of the beam oscillations at the beam resonant frequency. In addition, a damping element between additional mass and the beam is used to reduce any undesired oscillations due to newly created resonant frequencies introduced into the system.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: August 8, 1995
    Assignee: Kleinewefers GmbH
    Inventors: Hans-Rolf Conrad, Jochen Autrata, Albert Hille
  • Patent number: 5427020
    Abstract: A finger-protection device for a roller gap of a paper-calender with heated rollers has a hollow body (4) extending along the roller gap, with a front wall (5) facing a roller (3), defining the roller gap, a dome shaped rear wall (6), and two end walls (8). The strips (9, 10) forming the longitudinal edges of the front and rear walls are at an angular position in relation to the front and rear walls (5, 6) and are directed to the rollers (2, 3) limiting the roller gap. They provide a maximum distance (d) from the rollers (2, 3), which does not permit the passing through of one's fingers between a longitudinal edge and the adjacent roller (2, 3). The hollow body (4) is supported at its ends and can be adjusted relative to the rollers (2, 3). In order to simplify the manufacture and operational handling of the finger-protection device (1, 2) and also maintain a non-exceedable maximum distance (d) to the rollers during the operation, the hollow body (4 ) consists of fiber-reinforced synthetic resin plastic.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: June 27, 1995
    Assignee: Sulzer Papertec Krefeld GmbH
    Inventors: Hans-Rolf Conrad, Horst Castner