Patents by Inventor Wolfgang Drefs
Wolfgang Drefs 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: 7976680Abstract: Rope guide arrangement, deflection device, and method for guiding a leader strip of a material web through a device. The arrangement includes at least two ropes being arranged offset relative to one another in a first plane defined by a machine direction and a transverse machine direction. Further, the at least two ropes are arranged offset relative to one another in a second plane oriented at a non-zero angle from the first plane.Type: GrantFiled: May 6, 2008Date of Patent: July 12, 2011Assignee: Voith Patent GmbHInventors: Wolfgang Drefs, Sylvain Demers, Josef Schneid
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Publication number: 20080302499Abstract: Rope guide arrangement, deflection device, and method for guiding a leader strip of a material web through a device. The arrangement includes at least two ropes being arranged offset relative to one another in a first plane defined by a machine direction and a transverse machine direction. Further, the at least two ropes are arranged offset relative to one another in a second plane oriented at a non-zero angle from the first plane.Type: ApplicationFiled: May 6, 2008Publication date: December 11, 2008Applicant: VOITH PATENT GmbHInventors: Wolfgang DREFS, Sylvain DEMERS, Josef SCHNEID
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Patent number: 7381304Abstract: A method for threading a running paper web from a preceding section to a following section of a paper-making or paper-finishing machine, includes the steps of: providing a threading tail of the running paper web by cutting it from the running paper web at least one of its edges; providing at least one sensing element for gaining data from at least one property of the threading tail and/or threading process; transferring the gained data into a data collecting system and/or into an analysis system; and using the data for influencing the at least one property of the threading tail and/or the threading process.Type: GrantFiled: February 7, 2003Date of Patent: June 3, 2008Assignee: Voith Paper Patent GmbHInventors: Allan Broom, Sylvain Demers, Wolfgang Drefs
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Patent number: 7278603Abstract: A winding apparatus for transferring a web from a carrier drum to a spool. Pressure between the spool and the carrier drum is higher in the area of the feed strip of the web by applying a higher contact force, or by orienting the spool and drum at an angle to one another.Type: GrantFiled: July 15, 2003Date of Patent: October 9, 2007Assignee: Voith Paper Patent GmbHInventors: Wolfgang Drefs, Ewald Wetschenbacher, Zygmund Madrzak, Jorg Maurer
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Patent number: 7005036Abstract: An apparatus is available for transferring a flexible material web from an upstream section to at least one downstream section of a machine having a web running direction. The machine is configured for at least one of manufacturing and treating the material web. The apparatus includes two separation elements configured for splitting and thereby separating the material web into an edge strip, an adjoining transfer strip and a remaining web adjoining the transfer strip, the edge strip extending in the web running direction. The apparatus further includes at least one deflection device configured for deflecting the edge strip away from the transfer strip and simultaneously tautening the edge strip upon deflection thereof.Type: GrantFiled: July 16, 2003Date of Patent: February 28, 2006Assignee: Voith Paper Patent GmbHInventors: Rudolf Beisswanger, Wolfgang Drefs, Allan Broom, Sylvain Demers
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Patent number: 6994773Abstract: An apparatus is available for transferring a flexible material web from an upstream section to at least one downstream section of a machine having a web running direction. The machine is configured for at least one of manufacturing and treating the material web. The apparatus includes two separation elements configured for splitting and thereby separating the material web into an edge strip, an adjoining transfer strip and a remaining web adjoining the transfer strip, the edge strip extending in the web running direction. The apparatus further includes at least one deflection device configured for deflecting the edge strip away from the transfer strip and simultaneously tautening the edge strip upon deflection thereof.Type: GrantFiled: July 10, 2001Date of Patent: February 7, 2006Assignee: Voith Paper Patent GmbHInventors: Rudolf Beisswanger, Wolfgang Drefs, Allan Broom, Sylvain Demers
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Publication number: 20060006273Abstract: A winding apparatus for transferring a web from a carrier drum to a spool. Pressure between the spool and the carrier drum is higher in the area of the feed strip of the web by applying a higher contact force, or by orienting the spool and drum at an angle to one another.Type: ApplicationFiled: July 15, 2003Publication date: January 12, 2006Inventors: Wolfgang Drefs, Ewald Wetschenbacher, Zygmund Madrzak, Jorg Maurer
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Patent number: 6928912Abstract: An apparatus transfers a moving web of a flexible material from a web guide surface. The web guide surface outputs the moving web, and the moving web has at least one web edge. The apparatus includes at least one edge nozzle, each edge nozzle being positioned so as to be proximate one at least one web edge. Each edge nozzle is configured for separating the moving web from the web guide surface and is further configured to function as a severing device. Each edge nozzle is thereby configured for transversely severing the moving web and forming a new start portion thereof. Each edge nozzle briefly ejects therefrom a high-energy air jet, each high-energy air jet being ejected between the web guide surface and the moving web.Type: GrantFiled: March 20, 2002Date of Patent: August 16, 2005Assignee: Voith Paper Patent GmbHInventors: Wolfgang Drefs, Sylvain Demers, John Eagle
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Publication number: 20050167065Abstract: An apparatus transfers a moving web of a flexible material from a web guide surface. The web guide surface outputs the moving web, and the moving web has at least one web edge. The apparatus includes at least one edge nozzle, each edge nozzle being positioned so as to be proximate one at least one web edge. Each edge nozzle is configured for separating the moving web from the web guide surface and is further configured to function as a severing device. Each edge nozzle is thereby configured for transversely severing the moving web and forming a new start portion thereof. Each edge nozzle briefly ejects therefrom a high-energy air jet, each high-energy air jet being ejected between the web guide surface and the moving web.Type: ApplicationFiled: February 16, 2005Publication date: August 4, 2005Inventors: Wolfgang Drefs, Sylvain Demers, John Eagle
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Patent number: 6739545Abstract: Process and apparatus for winding a running material web, in particular a paper or cardboard web, in which the running material web is wound consecutively on several winding cores, in particular reel spools. At least one cut is made preferably running parallel to the web edge of the running material web and in the web travel direction of the running material web. After the started at least one cut has run through the nip formed by the winding roll and the new winding core, the at least one formed transfer strip which is incorporated in the running material web is detached from the outer circumferential area of the winding roll by at least one directed high-energy air jet that is generated briefly by at least one separator device and simultaneously cuts through. Subsequently, the at least one now detached transfer strip is transferred onto, and preferably applied to, the outer circumferential area of the new winding core by at least one first blower device, in particular a blower shoe.Type: GrantFiled: July 29, 2002Date of Patent: May 25, 2004Assignee: Voith Paper Patent GmbHInventors: Wolfgang Drefs, Ewald Wetschenbacher, Zygmunt Madrzak, Joerg Maurer
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Publication number: 20040016843Abstract: An apparatus is available for transferring a flexible material web from an upstream section to at least one downstream section of a machine having a web running direction. The machine is configured for at least one of manufacturing and treating the material web. The apparatus includes two separation elements configured for splitting and thereby separating the material web into an edge strip, an adjoining transfer strip and a remaining web adjoining the transfer strip, the edge strip extending in the web running direction. The apparatus further includes at least one deflection device configured for deflecting the edge strip away from the transfer strip and simultaneously tautening the edge strip upon deflection thereof.Type: ApplicationFiled: July 16, 2003Publication date: January 29, 2004Applicant: Voith Paper Patent GmbHInventors: Rudolf Beisswanger, Wolfgang Drefs, Allan Broom, Sylvain Demers
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Publication number: 20030150577Abstract: A method for threading a running paper web from a preceding section to a following section of a paper-making or paper-finishing machine, includes the steps of: providing a threading tail of the running paper web by cutting it from the running paper web at at least one of its edges; providing at least one sensing element for gaining data from at least one property of the threading tail and/or threading process; transferring the gained data into a data collecting system and/or into an analysis system; and using the data for influencing the at least one property of the threading tail and/or the threading process.Type: ApplicationFiled: February 7, 2003Publication date: August 14, 2003Inventors: Allan Broom, Sylvain Demers, Wolfgang Drefs
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Publication number: 20030025028Abstract: Process and apparatus for winding a running material web, in particular a paper or cardboard web, in which the running material web is wound consecutively on several winding cores, in particular reel spools. At least one cut is made preferably running parallel to the web edge of the running material web and in the web travel direction of the running material web. After the started at least one cut has run through the nip formed by the winding roll and the new winding core, the at least one formed transfer strip which is incorporated in the running material web is detached from the outer circumferential area of the winding roll by at least one directed high-energy air jet that is generated briefly by at least one separator device and simultaneously cuts through. Subsequently, the at least one now detached transfer strip is transferred onto, and preferably applied to, the outer circumferential area of the new winding core by at least one first blower device, in particular a blower shoe.Type: ApplicationFiled: July 29, 2002Publication date: February 6, 2003Applicant: VOITH PAPER PATENT GmbHInventors: Wolfgang Drefs, Ewald Wetschenbacher, Zygmunt Madrzak, Joerg Maurer
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Patent number: 6494992Abstract: Process for transferring at least a portion of a running web from a first section of a web making machine includes rotating an endless conveyor belt by driving at least one driven pulley, creating a negative pressure at an inner surface of endless conveyor belt as endless conveyor belt is guided over suction box, and guiding the at least a portion of running web onto endless conveyor belt. Process also includes transferring the at least a portion of the running web from endless conveyor to rope section located outside of a web width, pivoting endless conveyor belt around the pivot axis to move downstream end into an area of rope section one of at and before transferring, and pivoting endless conveyor belt around pivot axis to move downstream end into an area of the at least a portion of running web and inside web width.Type: GrantFiled: December 6, 2001Date of Patent: December 17, 2002Assignee: Voith Sulzer Papiertechnik Patent GmbHInventors: Leif Mohrsen, Allan Broom, George Kutak-Petrik, Wolfgang Drefs
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Publication number: 20020148874Abstract: An apparatus transfers a moving web of a flexible material from a web guide surface. The web guide surface outputs the moving web, and the moving web has at least one web edge. The apparatus includes at least one edge nozzle, each edge nozzle being positioned so as to be proximate one at least one web edge. Each edge nozzle is configured for separating the moving web from the web guide surface and is further configured to function as a severing device. Each edge nozzle is thereby configured for transversely severing the moving web and forming a new start portion thereof. Each edge nozzle briefly ejects therefrom a high-energy air jet, each high-energy air jet being ejected between the web guide surface and the moving web.Type: ApplicationFiled: March 20, 2002Publication date: October 17, 2002Inventors: Wolfgang Drefs, Sylvain Demers, John Eagle
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Patent number: 6387220Abstract: Apparatus for transferring at least a portion of a running web from a first section of a web making machine to a second section of the web making machine includes at least two pulleys, in which at least one is a driven pulley, a suction box coupled to a vacuum source, an air-pervious endless conveyor belt tensioned over the at least two pulleys to form a conveying run and a return run, and a device for creating a negative pressure at an inner surface of the conveying run. The at least one driven pulley is adapted to drive the endless conveyor belt over the at least two pulleys while the negative pressure propagates through the conveying run. The endless conveyor belt includes an upstream and a downstream end and the endless conveyor belt is pivotable around a pivot axis located in a region of the upstream end. The endless conveyor belt is pivotable to move the portion of the running web between the rope section and the portion is adapted to receive a full width of the running web.Type: GrantFiled: July 25, 2000Date of Patent: May 14, 2002Assignee: Voith Sulzer Papiertechnik Patent GmbHInventors: Leif Mohrsen, Allan Broom, George Kutak-Petrik, Wolfgang Drefs
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Publication number: 20020053414Abstract: An apparatus is available for transferring a flexible material web from an upstream section to at least one downstream section of a machine having a web running direction. The machine is configured for at least one of manufacturing and treating the material web. The apparatus includes two separation elements configured for splitting and thereby separating the material web into an edge strip, an adjoining transfer strip and a remaining web adjoining the transfer strip, the edge strip extending in the web running direction. The apparatus further includes at least one deflection device configured for deflecting the edge strip away from the transfer strip and simultaneously tautening the edge strip upon deflection thereof.Type: ApplicationFiled: July 10, 2001Publication date: May 9, 2002Inventors: Rudolf Beisswanger, Wolfgang Drefs, Allan Broom, Sylvain Demers
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Publication number: 20020036071Abstract: Process for transferring at least a portion of a running web from a first section of a web making machine includes rotating an endless conveyor belt by driving at least one driven pulley, creating a negative pressure at an inner surface of endless conveyor belt as endless conveyor belt is guided over suction box, and guiding the at least a portion of running web onto endless conveyor belt. Process also includes transferring the at least a portion of the running web from endless conveyor to rope section located outside of a web width, pivoting endless conveyor belt around the pivot axis to move downstream end into an area of rope section one of at and before transferring, and pivoting endless conveyor belt around pivot axis to move downstream end into an area of the at least a portion of running web and inside web width.Type: ApplicationFiled: December 6, 2001Publication date: March 28, 2002Applicant: VOITH SULZER PAPIERTECHNIK PATENT GMBHInventors: Leif Mohrsen, Allan Broom, George Kutak-Petrik, Wolfgang Drefs
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Patent number: 5114062Abstract: A roll for guidance of web type material, such as paper or cardboard, has a shell that features a multitude of bores. The roll is coordinated with a device for subjecting the roll interior to suction. To hold the web on the roll at standstill, part of these bores can be subjected to suction. In the operation of the roll, air trapped between the web and the roll shell can enter the roll also through the remaining bores and escape in the roll area that is not looped by the web.Type: GrantFiled: December 19, 1989Date of Patent: May 19, 1992Assignee: J.M. Voith GmbHInventors: Friedrich Kuhn, Wolfgang Drefs, Hans Ruff, Siegbert Scheuter