Patents by Inventor Harald Ligtenberg

Harald Ligtenberg 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).

  • Patent number: 11772319
    Abstract: The invention relates to a method and a device for manufacturing a pipe shell from an insulating material by means of which the cycle times can be further reduced while the quality of the pipe shell is simultaneously improved, by at least one web (29) of the insulating material which is provided with a binding agent being wound around a core (19) by means of at least two opposing belts (12, 13) which wrap around the core (19) partially. The method steps are characterized in that the at least one wound-up web (32) of insulating material is removed in a radial direction of the core (19) which is, however, not opposite to the direction in which the at least one web (29) of insulating material was fed by the one belt (12), especially by the wound-up web (32) being discharged through the same belt (12).
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: October 3, 2023
    Assignee: SAINT-GOBAIN ISOVER
    Inventors: Nikolaus Wesely, Harald Ligtenberg, Hans-Joachim Höller, Romain Lecomte
  • Publication number: 20220105671
    Abstract: The invention relates to a method and a device for manufacturing a pipe shell from an insulating material by means of which the cycle times can be further reduced while the quality of the pipe shell is simultaneously improved, by at least one web (29) of the insulating material which is provided with a binding agent being wound around a core (19) by means of at least two opposing belts (12, 13) which wrap around the core (19) partially. The method steps are characterized in that the at least one wound-up web (32) of insulating material is removed in a radial direction of the core (19) which is, however, not opposite to the direction in which the at least one web (29) of insulating material was fed by the one belt (12), especially by the wound-up web (32) being discharged through the same belt (12).
    Type: Application
    Filed: February 10, 2020
    Publication date: April 7, 2022
    Inventors: Nikolaus Wesely, Harald Ligtenberg, Hans-Joachim Höller, Romain Lecomte
  • Patent number: 7740922
    Abstract: The invention relates to a process for producing pipe sleeves made of mineral wool for insulating pipelines or for reducing the sound level in pipeline systems, comprising the following steps: providing a nonwoven web (11) made of mineral wool which is provided with an uncured binder, winding up the nonwoven web (11) on a winding mandrel (2) of a winder, curing the binder. Here, at least one reinforcing layer (12, 13) is provided before the nonwoven web (11) runs into the winder, in such a way that during the winding the said reinforcing layer becomes a constituent part of the pipe sleeve produced as a result.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: June 22, 2010
    Assignee: Saint-Gobain Isover
    Inventors: Harald Ligtenberg, Anton Zysik, Jens Meyer, Volker Albrecht
  • Publication number: 20060141177
    Abstract: The invention relates to a process for producing pipe sleeves made of mineral wool for insulating pipelines or for reducing the sound level in pipeline systems, comprising the following steps: providing a nonwoven web (11) made of mineral wool which is provided with an uncured binder, winding up the nonwoven web (11) on a winding mandrel (2) of a winder, curing the binder. Here, at least one reinforcing layer (12, 13) is provided before the nonwoven web (11) runs into the winder, in such a way that during the winding the said reinforcing layer becomes a constituent part of the pipe sleeve produced as a result.
    Type: Application
    Filed: April 14, 2004
    Publication date: June 29, 2006
    Inventors: Harald Ligtenberg, Anton Zysik, Jens Meyer, Volker Albrecht