Patents by Inventor Klaus Lehleiter
Klaus Lehleiter 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).
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Patent number: 8221590Abstract: The invention relates to a headbox for a machine for producing a fibrous web, especially a paper or cardboard web, from at least one fiber suspension, comprising a feed device feeding the at least one fiber suspension, a perforated distribution pipe plate arranged immediately downstream thereof and having a plurality of channels arranged in lines and columns, an intermediate channel arranged downstream thereof, extending over the width of the headbox and having a plurality of means for dosing a fluid in partial fluid streams to the at least one fiber suspension in a preferably adjustable/controlled manner, the means being spaced apart from each other in the width direction of the headbox and the individual means comprising a plurality of dosing channels having respective dosing channel openings on the outlet side and a dosing channel length, arriving at different levels and being connected to a common supply channel.Type: GrantFiled: June 1, 2011Date of Patent: July 17, 2012Assignee: Voith Patent GmbHInventors: Wolfgang Ruf, Konstantin Ferkl, Markus Iläussler, Klaus Lehleiter
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Publication number: 20110290441Abstract: The invention relates to a headbox for a machine for producing a fibrous web, especially a paper or cardboard web, from at least one fiber suspension, comprising a feed device feeding the at least one fiber suspension, a perforated distribution pipe plate arranged immediately downstream thereof and having a plurality of channels arranged in lines and columns, an intermediate channel arranged downstream thereof, extending over the width of the headbox and having a plurality of means for dosing a fluid in partial fluid streams to the at least one fiber suspension in a preferably adjustable/controlled manner, the means being spaced apart from each other in the width direction of the headbox and the individual means comprising a plurality of dosing channels having respective dosing channel openings on the outlet side and a dosing channel length, arriving at different levels and being connected to a common supply channel.Type: ApplicationFiled: June 1, 2011Publication date: December 1, 2011Inventors: Wolfgang Ruf, Konstantin Ferkl, Markus Iläussler, Klaus Lehleiter
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Patent number: 6890408Abstract: Headbox for one of a paper and cardboard machine includes at least one material suspension supply running a width of the machine. At least one turbulence producer has at least one conduit through which a material suspension flows. At least one metered addition point is located in the conduit for introducing a fluid medium. A headbox nozzle is located downstream from the at least one turbulence producer for delivering the material suspension. A portion of a flow resistance located downstream of the metered addition point is at least approximately 50% of a total flow resistance of the at least one conduit.Type: GrantFiled: August 23, 2002Date of Patent: May 10, 2005Assignee: Voith Sulzer Papiertechnik Patent GmbHInventors: Wolfgang Ruf, Hans Loser, Klaus Lehleiter
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Patent number: 6602388Abstract: Process of forming a headbox for a machine, which includes arranging a plurality of headbox channels into rows and columns, positioning a lamella between adjacent rows, fixing an end of the lamella at a fixing point, and arranging lamellar supports downstream of, relative to a headbox flow direction, the fixing point.Type: GrantFiled: September 11, 2002Date of Patent: August 5, 2003Assignee: Voith Sulzer Papiertechnik Patent GmbHInventors: Wolfgang Ruf, Hans Loser, Thomas Dietz, Klaus Lehleiter, Konstantin Fenkl
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Patent number: 6585860Abstract: Method for regulating a basis weight of a paper or cardboard web in the manufacturing process. The method includes determining a basis weight at an end of the manufacturing process, calculating a deviation of the determined basis weight from a predetermined target value, adjusting a concentration of a material suspension supplied to a headbox via a first control loop such that the calculated deviation is corrected, one of directly and indirectly measuring a basis weight of a resulting web in a region upstream, with regard to a web travel direction, a drying section, and supplying a signal related to the measured basis weight to a second control loop.Type: GrantFiled: February 22, 2002Date of Patent: July 1, 2003Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Wolfgang Ruf, Hans Loser, Klaus Lehleiter
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Patent number: 6524441Abstract: Process and a device for detecting a change in the fiber orientation cross-direction profile of a paper or cardboard web in the manufacturing process on a paper or cardboard machine. It is recognized that a change in the fiber orientation cross-direction profile in the web is inferred or determined by way of a characteristic change in the basis weight cross-direction profile or at least one measurement quantity that correlates to it, and/or by way of a characteristic change in the basis weight in the travel direction of the web or at least one measurement quantity that correlates to it. The device includes an arrangement for detecting a change in the basis weight cross-direction profile and/or a characteristic chronological course of the change in the basis weight, which is characteristic for a change in the fiber orientation.Type: GrantFiled: December 1, 2000Date of Patent: February 25, 2003Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Wolfgang Ruf, Hans Loser, Ulrich Begemann, Klaus Lehleiter
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Publication number: 20030005565Abstract: Process of forming a headbox for a machine, which includes arranging a plurality of headbox channels into rows and columns, positioning a lamella between adjacent rows, fixing an end of the lamella at a fixing point, and arranging lamellar supports downstream of, relative to a headbox flow direction, the fixing point.Type: ApplicationFiled: September 11, 2002Publication date: January 9, 2003Applicant: Voith Sulzer Papiertechnik Patent GmbHInventors: Wolfgang Ruf, Hans Loser, Thomas Dietz, Klaus Lehleiter, Konstantin Fenkl
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Patent number: 6471828Abstract: Headbox for a machine and process for forming the same. The headbox includes a plurality of channels arranged in rows that extend across a width of the machine and in columns substantially perpendicular to the rows, at least one lamella positioned between adjacent rows, a fixing point for the at least one lamella, and lamellar supports positioned after the fixing point, relative to a headbox flow. This includes arranging a plurality of headbox channels into rows and columns, positioning a lamella between adjacent rows, fixing an end of the lamella at a fixing point, and arranging lamellar supports downstream of, relative to a headbox flow direction, the fixing point.Type: GrantFiled: June 9, 2000Date of Patent: October 29, 2002Assignee: Voith Sulzer Papiertechnik Patent GmbHInventors: Wolfgang Ruf, Hans Loser, Thomas Dietz, Klaus Lehleiter, Konstantin Fenkl
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Headbox and process for the metered addition of a fluid medium into a suspension stream of a headbox
Patent number: 6464837Abstract: Process for a metered addition of a fluid medium into a material suspension stream of a headbox, including feeding the material suspension in a main flow direction through at least one turbulence-producing conduit to a headbox nozzle, the at least one turbulence-producing conduit having an entrance, a graduated pressure loss area, and an exit. A total pressure loss &Dgr;Ptotal is caused in the at least one turbulence-producing conduit such that the total pressure loss &Dgr;Ptotal includes at least one intake pressure loss &Dgr;Pintake formed at the entrance and a graduated pressure loss &Dgr;Pgrad formed at the graduated pressure loss area. A metered addition of a fluid medium is also provided in a region between the entrance and the exit.Type: GrantFiled: February 3, 2000Date of Patent: October 15, 2002Assignee: Voith Sulzer Papiertechnik Patent GmbHInventors: Wolfgang Ruf, Hans Loser, Klaus Lehleiter -
Publication number: 20020117282Abstract: Method for regulating a basis weight of a paper or cardboard web in the manufacturing process. The method includes determining a basis weight at an end of the manufacturing process, calculating a deviation of the determined basis weight from a predetermined target value, adjusting a concentration of a material suspension supplied to a headbox via a first control loop such that the calculated deviation is corrected, one of directly and indirectly measuring a basis weight of a resulting web in a region upstream, with regard to a web travel direction, a drying section, and supplying a signal related to the measured basis weight to a second control loop.Type: ApplicationFiled: February 22, 2002Publication date: August 29, 2002Applicant: Voith Sulzer Papiermaschinen GmbHInventors: Wolfgang Ruf, Hans Loser, Klaus Lehleiter
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Patent number: 6368461Abstract: Paper or cardboard machine and method for regulating a basis weight of a paper or cardboard web in the manufacturing process. The paper or cardboard machine includes at least one headbox that extends across a machine width. The at least one headbox is adapted to provide a machine-wide distribution of a material suspension onto one of a screen and between two screens. The machine also includes at least one material suspension supply coupled to the at least one headbox and adapted to supply a material suspension to the at least one headbox. The at least one material suspension supply has at least one concentration.Type: GrantFiled: August 19, 1998Date of Patent: April 9, 2002Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Wolfgang Ruf, Hans Loser, Klaus Lehleiter
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Patent number: 6261418Abstract: Headbox for a paper-making machine including a nozzle extending transversely to the machine running direction across the machine width. The nozzle has a lower and an upper continuous wall each extending across the machine width. The lower nozzle wall is supported by several separate supporting elements distributed across the machine width on a foundation. The supporting elements are non-rigid or flexible plates to permit bending in a direction transversely to the machine running direction. Alternatively or additionally, a swivelable or pivotable upper nozzle wall is connected by several separate supporting members distributed across the machine width to a transverse bar attached above a swivel axis. The supporting members are non-rigid or flexible plates to permit bending transversely to the machine running direction.Type: GrantFiled: October 4, 1999Date of Patent: July 17, 2001Assignee: Voith Sulzer Papiertechnik Patent GmbHInventors: Wolf Gunter Stotz, Thomas Merath, Klaus Lehleiter, Christoph Link, Josef Frey, Eckart Krägeloch, Thomas Dietz, Simon Juhas, Jürgen Banning
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Publication number: 20010000002Abstract: Process and a device for detecting a change in the fiber orientation cross-direction profile of a paper or cardboard web in the manufacturing process on a paper or cardboard machine. It is recognized that a change in the fiber orientation cross-direction profile in the web is inferred or determined by way of a characteristic change in the basis weight cross-direction profile or at least one measurement quantity that correlates to it, and/or by way of a characteristic change in the basis weight in the travel direction of the web or at least one measurement quantity that correlates to it. The device includes an arrangement for detecting a change in the basis weight cross-direction profile and/or a characteristic chronological course of the change in the basis weight, which is characteristic for a change in the fiber orientation.Type: ApplicationFiled: December 1, 2000Publication date: March 15, 2001Inventors: Wolfgang Ruf, Hans Loser, Ulrich Begemann, Klaus Lehleiter
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Patent number: 6174413Abstract: Process and a device for detecting a change in the fiber orientation cross-direction profile of a paper or cardboard web in the manufacturing process on a paper or cardboard machine. It is recognized that a change in the fiber orientation cross-direction profile in the web is inferred or determined by way of a characteristic change in the basis weight cross-direction profile or at least one measurement quantity that correlates to it, and/or by way of a characteristic change in the basis weight in the travel direction of the web or at least one measurement quantity that correlates to it. The device includes an arrangement for detecting a change in the basis weight cross-direction profile and/or a characteristic chronological course of the change in the basis weight, which is characteristic for a change in the fiber orientation.Type: GrantFiled: July 31, 1998Date of Patent: January 16, 2001Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Wolfgang Ruf, Hans Loser, Ulrich Begemann, Klaus Lehleiter
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Patent number: 6162331Abstract: An apparatus and a process for controlling or regulating a web property profile of a paper or cardboard web produced in the manufacturing process of a paper or cardboard machine is disclosed. The apparatus incorporates information regarding the position of one or more devices of a plurality of adjustable devices for sectionally manipulating at least one web property for regulating or controlling the devices to manipulate at least one web property across the width of the machine. The process includes combing the regulating process or a regulator device for adjusting individual actuators that only act on a certain section of conventional systems with the adjustment of an actuator acting across the entire web width for achieving a certain web property, so that the sectionally-operating actuators are not located in an end-position, so that these sectional actuators continue to be able to adjust the web property.Type: GrantFiled: August 19, 1998Date of Patent: December 19, 2000Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Wolfgang Ruf, Hans Loser, Klaus Lehleiter
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Patent number: 6077395Abstract: Head box for manufacturing a fibrous pulp web. The head box may include a pulp suspension inlet feed device that is sectioned across a width of the head box that feeds a pulp suspension in a feed direction, at least one device having a plurality of entrance ports that produces microturbulences, and an intermediate channel extending across the width of the head box and positioned in front of the at least one device. A plurality of partition units being positionably adjustable into the intermediate channel and being arranged parallel to the feed direction.Type: GrantFiled: February 13, 1998Date of Patent: June 20, 2000Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Klaus Lehleiter, Hans Loser, Wolfgang Ruf
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Patent number: 5993606Abstract: A headbox for passing fiber suspension from a headbox entrance to a headbox outlet. A microturbulence insert with a plurality of flow channels inside the headbox. The channels are defined by channel forming elements having upstream ends. The headbox has an antechamber upstream of the turbulence insert. Respective individually adjustable additional feeds for feeding at least one second liquid into the antechamber upstream of the upstream ends of the channel forming elements of the turbulence insert. The feeds are preferably directed counter to the direction of the main flow of suspension into the channels of the turbulence insert. Vanes direct the main flow of suspension through the antechamber to the channels creating a respective sectioned flow to each channel. The additional liquid feeds are positioned to feed their additional liquid into the respective sectional flows after the main flow of suspension has already been diverted to a sectional flow.Type: GrantFiled: December 5, 1997Date of Patent: November 30, 1999Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Klaus Lehleiter, Hans Loser, Wolfgang Ruf
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Patent number: 5985098Abstract: Apparatus for influencing a cross-sectional profile of a headbox having an inner chamber and process for determining a width and position for the sections of the headbox. The apparatus includes a device for distributing fluid that extends across a machine width, at least one connection opening extending across the machine width between the fluid distribution device and the inner chamber of the headbox, and a plurality of elements being one of continuously and discretely adjustably positionable within the fluid distributing device to section the fluid distributing device across the machine width. The process includes measuring a profile of a selected characteristic of the pulp suspension in the headbox that is dependent on its position; forming intersecting points of the profile of the characteristic with a uniform sectioning of the size of the characteristic under consideration; and determining the position and width of the sections.Type: GrantFiled: May 22, 1998Date of Patent: November 16, 1999Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Klaus Lehleiter, Hans Loser, Wolfgang Ruf
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Patent number: 5900121Abstract: Dosing feeder for the breast box of a papermaking machine. The metering device of this invention serves for the addition or the removal of fluids into or from the breast box of a papermaking machine and includes a chamber for the reception of fluids, with the chamber including a number of metering openings that are connected with the suspension-carrying parts of the breast box via throttling devices, whereby the fluid can be added or removed locally.Type: GrantFiled: April 7, 1997Date of Patent: May 4, 1999Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Klaus Lehleiter, Rudolf Munch
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Patent number: 5795441Abstract: Breast box for a papermaking machine. The breast box includes devices in order to add, across the width thereof, localized and dosed material dilution liquids, and located within the breast box is a guiding device having a plurality of channels located immediately downstream of the supply and distribution apparatus, with the guiding device including a multiplicity of inserts in which the channels are located and on whose outer surfaces hollow chambers are formed, wherein the hollow chambers can be filled with the material dilution liquid, the latter then flowing from these hollow chambers into open recesses in the distribution device, with the recesses being directed upstream to the suspension stream existing in the distribution apparatus during the operation thereof.Type: GrantFiled: October 17, 1995Date of Patent: August 18, 1998Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Klaus Lehleiter, Robert Trondle