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).

  • Publication number: 20200016684
    Abstract: 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: Application
    Filed: March 28, 2018
    Publication date: January 16, 2020
    Inventor: Gerhard Gnad
  • Publication number: 20190381599
    Abstract: 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: Application
    Filed: April 6, 2018
    Publication date: December 19, 2019
    Inventors: Gerhard Gnad, Bastian Ewald, Armin Geiger
  • Patent number: 9833946
    Abstract: 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 feeding
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: December 5, 2017
    Assignee: Herrmann Ultraschalltechnik GmbH & Co. KG
    Inventor: Gerhard Gnad
  • Publication number: 20170087761
    Abstract: 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 feeding
    Type: Application
    Filed: July 20, 2015
    Publication date: March 30, 2017
    Inventor: Gerhard Gnad
  • Patent number: 9427912
    Abstract: 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: Grant
    Filed: April 15, 2014
    Date of Patent: August 30, 2016
    Assignee: Herrmann Ultraschalltechnik GmbH & Co. KG
    Inventors: Arnold Schneider, Gerhard Gnad
  • Publication number: 20160067912
    Abstract: 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: Application
    Filed: April 15, 2014
    Publication date: March 10, 2016
    Inventors: Arnold SCHNEIDER, Gerhard GNAD
  • Patent number: 8844250
    Abstract: 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: Grant
    Filed: May 29, 2006
    Date of Patent: September 30, 2014
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventors: Valentin S. Nemkov, Nikolay Madzharov, Gerhard Gnad
  • Patent number: 7868518
    Abstract: 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: Grant
    Filed: November 11, 2009
    Date of Patent: January 11, 2011
    Assignee: Herrmann Ultraschalltechnik GmbH & Co. KG
    Inventors: Gerhard Gnad, Arnold Schneider
  • Publication number: 20100050844
    Abstract: 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: Application
    Filed: November 11, 2009
    Publication date: March 4, 2010
    Inventors: Gerhard Gnad, Arnold Schneider
  • Publication number: 20090090088
    Abstract: 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: Application
    Filed: May 29, 2006
    Publication date: April 9, 2009
    Applicant: TETRA LAVAL HOLDINGS & FINANCE SA
    Inventors: Valentin S. Nemkov, Nikolay Madzharov, Gerhard Gnad
  • Publication number: 20070251977
    Abstract: 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: Application
    Filed: March 8, 2007
    Publication date: November 1, 2007
    Applicant: Herrmann Ultraschalltechnik GmbH & Co.KG
    Inventors: Gerhard Gnad, Arnold Schneider
  • Patent number: 6190296
    Abstract: 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: Grant
    Filed: December 3, 1998
    Date of Patent: February 20, 2001
    Assignee: Ultraschalltechnik GmbH & Co. KG
    Inventors: Gerhard Gnad, Stefan Rau, Ulrich Vogler
  • Patent number: 4133806
    Abstract: 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: Grant
    Filed: June 3, 1974
    Date of Patent: January 9, 1979
    Assignee: BASF Aktiengesellschaft
    Inventor: Gerhard Gnad
  • Patent number: 3979378
    Abstract: 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: Grant
    Filed: January 27, 1971
    Date of Patent: September 7, 1976
    Assignee: Badische Anilin- & Soda-Fabrik Aktiengesellschaft
    Inventors: Gerhard Gnad, Gunther Lamm, Johannes Dehnert