Patents by Inventor Gerhard Gnad
Gerhard Gnad 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: 11292075Abstract: The present invention relates to a method for intermittent ultrasonic processing of a length of material, wherein a length of material is moved through between a sonotrode and a counter-tool and the length of material is processed intermittently. In order to specify a method for intermittent ultrasonic processing of a length of material by which the disadvantages of the prior art can be avoided or at least reduced, according to the invention it is suggested that in a processing interval the sonotrode is stimulated by an ultrasonic oscillation with an oscillation amplitude A and in a movement interval the sonotrode is stimulated with an oscillation amplitude B, wherein B<A and during the processing interval and during the movement interval the length of material touches both the sonotrode and also the counter-tool.Type: GrantFiled: April 6, 2018Date of Patent: April 5, 2022Assignee: HERRMANN ULTRASCHALLTECHNIK GMBH & CO. KGInventors: Gerhard Gnad, Bastian Ewald, Armin Geiger
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Publication number: 20220075341Abstract: The present invention concerns a method of detecting the making or breaking of contact of a sonotrode (4) which is caused to vibrate with a frequency f and a vibration amplitude A0 with a counterpart element (5). To provide a method with which contact-making or breaking of a sonotrode with a counterpart element can be particularly quickly and inexpensively detected it is proposed according to the invention that the method has the following steps: a) recording a time configuration of the vibration amplitude A0 (1) during a first measurement time interval ?T, and b) determining from the time configuration of the vibration amplitude A0 (1) whether making or breaking of contact occurred within the measurement time interval ?T.Type: ApplicationFiled: March 10, 2020Publication date: March 10, 2022Inventor: Gerhard Gnad
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Publication number: 20200016684Abstract: The present invention relates to an ultrasonic machine tool comprising a first sonotrode (2) with a first resonant frequency f1, a first converter (4) which is connected to the first sonotrode (2), and a generator (1) with a generator output for generating a first electrical alternating voltage with the first frequency f1 and for outputting the first electrical alternating voltage at the generator output, the generator output being connected to the first converter (4).Type: ApplicationFiled: March 28, 2018Publication date: January 16, 2020Inventor: Gerhard Gnad
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Publication number: 20190381599Abstract: The present invention relates to a method for intermittent ultrasonic processing of a length of material, wherein a length of material is moved through between a sonotrode and a counter-tool and the length of material is processed intermittently. In order to specify a method for intermittent ultrasonic processing of a length of material by which the disadvantages of the prior art can be avoided or at least reduced, according to the invention it is suggested that in a processing interval the sonotrode is stimulated by an ultrasonic oscillation with an oscillation amplitude A and in a movement interval the sonotrode is stimulated with an oscillation amplitude B, wherein B<A and during the processing interval and during the movement interval the length of material touches both the sonotrode and also the counter-tool.Type: ApplicationFiled: April 6, 2018Publication date: December 19, 2019Inventors: Gerhard Gnad, Bastian Ewald, Armin Geiger
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Patent number: 9833946Abstract: The present invention relates to a device for the ultrasonic processing of materials, which has an ultrasonic processing system, which comprises: an ultrasound generator, a converter (12), a sonotrode (16), and a counter tool (18); wherein the sonotrode (16) and/or the counter tool (18) has a substantially cylindrical sealing surface having at least one elevation (45) and can be rotated such that, during the processing, the elevation (45) rotates about the axis of rotation and comes in contact with the material web (20) during a sealing time, wherein a control apparatus (24) is provided for the ultrasound generator, to which control apparatus a feedback variable from the ultrasound processing system is fed and which control apparatus determines a manipulated variable therefrom and feeds said manipulated variable to the ultrasound generator, wherein a process variable from the processing process is determined and is linked to the manipulated variable determined by the control apparatus (24) before the feedingType: GrantFiled: July 20, 2015Date of Patent: December 5, 2017Assignee: Herrmann Ultraschalltechnik GmbH & Co. KGInventor: Gerhard Gnad
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Publication number: 20170087761Abstract: The present invention relates to a device for the ultrasonic processing of materials, which has an ultrasonic processing system, which comprises: an ultrasound generator, a converter (12), a sonotrode (16), and a counter tool (18); wherein the sonotrode (16) and/or the counter tool (18) has a substantially cylindrical sealing surface having at least one elevation (45) and can be rotated such that, during the processing, the elevation (45) rotates about the axis of rotation and comes in contact with the material web (20) during a sealing time, wherein a control apparatus (24) is provided for the ultrasound generator, to which control apparatus a feedback variable from the ultrasound processing system is fed and which control apparatus determines a manipulated variable therefrom and feeds said manipulated variable to the ultrasound generator, wherein a process variable from the processing process is determined and is linked to the manipulated variable determined by the control apparatus (24) before the feedingType: ApplicationFiled: July 20, 2015Publication date: March 30, 2017Inventor: Gerhard Gnad
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Patent number: 9427912Abstract: The invention relates to an ultrasonic welding apparatus for ultrasonic machining of a material, having at least two sonotrodes and a converter device, which converts an electrical AC voltage into an ultrasonic vibration and sets the at least two sonotrodes in ultrasonic vibration, the at least two sonotrodes being arranged in such a manner that the material to be machined is arranged between them during machining and can at the same time be machined by the at least two sonotrodes. To specify an ultrasonic welding apparatus that allows effective material machining without an undesirable interaction occurring between the two sonotrodes, the converter device according to the invention excites the first sonotrode at a frequency fs1 and the second sonotrode at a frequency fs2, fs2 being greater than fs1.Type: GrantFiled: April 15, 2014Date of Patent: August 30, 2016Assignee: Herrmann Ultraschalltechnik GmbH & Co. KGInventors: Arnold Schneider, Gerhard Gnad
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Publication number: 20160067912Abstract: The invention relates to an ultrasonic welding apparatus for ultrasonic machining of a material, having at least two sonotrodes and a converter device, which converts an electrical AC voltage into an ultrasonic vibration and sets the at least two sonotrodes in ultrasonic vibration, the at least two sonotrodes being arranged in such a manner that the material to be machined is arranged between them during machining and can at the same time be machined by the at least two sonotrodes. To specify an ultrasonic welding apparatus that allows effective material machining without an undesirable interaction occurring between the two sonotrodes, the converter device according to the invention excites the first sonotrode at a frequency fs1 the second sonotrode at a frequency fs2, fs2 being greater than fs1.Type: ApplicationFiled: April 15, 2014Publication date: March 10, 2016Inventors: Arnold SCHNEIDER, Gerhard GNAD
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Patent number: 8844250Abstract: A sealing device for producing sealed packages from a tube of packaging material fed along a path and filled with a pourable food product, comprising: a frame; a pair of jaws movable cyclically with respect to the frame and along part of the path to grip the tube; ultrasonic sealing means carried by a first jaw to seal the tube; and power means including a primary winding fixed to the frame and connectable to an electric energy source, and a secondary winding carried by the first jaw, supplying the sealing means, and receiving electric energy by electromagnetic induction from the primary winding as the first jaw travels past the primary winding; and the device having transformer means supplied by the electric energy source with a first voltage value, and supplying the primary winding with a second voltage value lower than the first voltage value.Type: GrantFiled: May 29, 2006Date of Patent: September 30, 2014Assignee: Tetra Laval Holdings & Finance S.A.Inventors: Valentin S. Nemkov, Nikolay Madzharov, Gerhard Gnad
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Patent number: 7868518Abstract: A device for processing workpieces uses ultrasound, with an resonant system comprising an ultrasound generator, an ultrasound sonotrode, and an anvil, wherein a workpiece is processed between the anvil and the ultrasound sonotrode. The ultrasound generator comprises a regulation means which has a regulation member connected upstream of the ultrasound generator to receive a feedback signal from the resonant system and to generate a regulation variable which is supplied to the ultrasound generator. A connecting point is provided between the regulation member and the ultrasound generator, at which the regulation variable of the regulation member is linked to a process variable from the processing procedure.Type: GrantFiled: November 11, 2009Date of Patent: January 11, 2011Assignee: Herrmann Ultraschalltechnik GmbH & Co. KGInventors: Gerhard Gnad, Arnold Schneider
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Publication number: 20100050844Abstract: A device for processing workpieces uses ultrasound, with an resonant system comprising an ultrasound generator, an ultrasound sonotrode, and an anvil, wherein a workpiece is processed between the anvil and the ultrasound sonotrode. The ultrasound generator comprises a regulation means which has a regulation member connected upstream of the ultrasound generator to receive a feedback signal from the resonant system and to generate a regulation variable which is supplied to the ultrasound generator. A connecting point is provided between the regulation member and the ultrasound generator, at which the regulation variable of the regulation member is linked to a process variable from the processing procedure.Type: ApplicationFiled: November 11, 2009Publication date: March 4, 2010Inventors: Gerhard Gnad, Arnold Schneider
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Publication number: 20090090088Abstract: A sealing device for producing sealed packages from a tube of packaging material fed along a path and filled with a pourable food product, comprising: a frame; a pair of jaws movable cyclically with respect to the frame and along part of the path to grip the tube; ultrasonic sealing means carried by a first jaw to seal the tube; and power means including a primary winding fixed to the frame and connectable to an electric energy source, and a secondary winding carried by the first jaw, supplying the sealing means, and receiving electric energy by electromagnetic induction from the primary winding as the first jaw travels past the primary winding; and the device having transformer means supplied by the electric energy source with a first voltage value, and supplying the primary winding with a second voltage value lower than the first voltage value.Type: ApplicationFiled: May 29, 2006Publication date: April 9, 2009Applicant: TETRA LAVAL HOLDINGS & FINANCE SAInventors: Valentin S. Nemkov, Nikolay Madzharov, Gerhard Gnad
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Publication number: 20070251977Abstract: A device for processing workpieces uses ultrasound, with an resonant system comprising an ultrasound generator, an ultrasound sonotrode, and an anvil, wherein a workpiece is processed between the anvil and the ultrasound sonotrode. The ultrasound generator comprises a regulation means which has a regulation member connected upstream of the ultrasound generator to receive a feedback signal from the resonant system and to generate a regulation variable which is supplied to the ultrasound generator. A connecting point is provided between the regulation member and the ultrasound generator, at which the regulation variable of the regulation member is linked to a process variable from the processing procedure.Type: ApplicationFiled: March 8, 2007Publication date: November 1, 2007Applicant: Herrmann Ultraschalltechnik GmbH & Co.KGInventors: Gerhard Gnad, Arnold Schneider
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Patent number: 6190296Abstract: In an apparatus for machining a material web by means of a sonotrode, the pressure force of the sonotrode is determined and is used as a control signal for the advance of the sonotrode, as a result of which the nip height is set.Type: GrantFiled: December 3, 1998Date of Patent: February 20, 2001Assignee: Ultraschalltechnik GmbH & Co. KGInventors: Gerhard Gnad, Stefan Rau, Ulrich Vogler
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Patent number: 4133806Abstract: Azo dyes represented by the formula ##STR1## in which R.sup.2 represents alkyl of 1 to 4 carbon atoms or may also represent ethyl or propyl substituted by hydroxy or alkoxy of 1 to 4 carbon atoms, and R.sup.3 is C.sub.4 H.sub.9 --, CH.sub.3 OCH.sub.2 CH.sub.2 --, CH.sub.3 (CH.sub.2).sub.4 --, CH.sub.3 (CH.sub.2).sub.5 --, CH.sub.3 (CH.sub.2).sub.7 --, ##STR2## or cycloalkyl of 5 to 8 carbon atoms. These dyes have excellent fastness properties and are especially useful for dyeing cellulose ester and polyester fibrous materials.Type: GrantFiled: June 3, 1974Date of Patent: January 9, 1979Assignee: BASF AktiengesellschaftInventor: Gerhard Gnad
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Patent number: 3979378Abstract: Azo dyes containing sulfonic or carboxylic acid groups and having a substituted 2-hydroxypyridone-(6) as coupling component. The dyes are particularly valuable for dyeing natural or synthetic polyamides.Type: GrantFiled: January 27, 1971Date of Patent: September 7, 1976Assignee: Badische Anilin- & Soda-Fabrik AktiengesellschaftInventors: Gerhard Gnad, Gunther Lamm, Johannes Dehnert