Patents by Inventor Willi Liebscher

Willi Liebscher 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: 10161070
    Abstract: The invention relates to a device and a method for the bonding of a textile web, whereby the textile web is guided over an idler drum into a bonding plant, led around a through-air drum and over a cooling drum and then led out again, whereby heated fresh air flows through the web and the through-air drum and the exhaust air is extracted from the bonding plant. According to the invention, it is intended that cooling air is directed onto the web ahead of the detachment point of the web from the through-air drum onto the web.
    Type: Grant
    Filed: August 16, 2014
    Date of Patent: December 25, 2018
    Assignee: TRUETZSCHLER GMBH & CO. KG
    Inventors: Thomas Weigert, Willi Liebscher, Stephan Hajdu
  • Publication number: 20160312391
    Abstract: The invention relates to a device and a method for the bonding of a textile web, whereby the textile web is guided over an idler drum into a bonding plant, led around a through-air drum and over a cooling drum and then led out again, whereby heated fresh air flows through the web and the through-air drum and the exhaust air is extracted from the bonding plant. According to the invention, it is intended that cooling air is directed onto the web ahead of the detachment point of the web from the through-air drum onto the web.
    Type: Application
    Filed: August 16, 2014
    Publication date: October 27, 2016
    Applicant: TRUETZSCHLER GMBH & CO. KG
    Inventors: Thomas WEIGERT, Willi LIEBSCHER, Stephan HAJDU
  • Publication number: 20130042448
    Abstract: The invention relates to a device for solidifying a material web (F) formed of fibers and/or filaments, said device comprising a screen belt (S) carrying the material web (F), a nozzle beam (D) arranged above the screen belt (S) for subjecting the material web (F) to a pressurized fluid with a plurality of fluid jets (W) arranged in at least one row, and a suction device which is disposed below the screen belt (S), interacts with the nozzle beam (D) and has a suction gap (A). The invention is characterized in that the fluid jets (W) hit the material web (F) in the surface area of the suction gap (A). According to the invention, the fluid application (W) is carried out in the rear section of the suction gap (A) when seen in the conveying direction of the material web (F).
    Type: Application
    Filed: January 29, 2011
    Publication date: February 21, 2013
    Inventor: Willi Liebscher
  • Patent number: 7981357
    Abstract: A spunbond web is made by extruding a multiplicity of hot thermoplastic filaments, passing the filaments along an upstream stretch of a path, cooling and stretching the filaments as they move along the upstream stretch of the path, and depositing the cooled and stretched filaments at a downstream end of the upstream stretch on a foraminous belt such that the filaments form a mat thereon. The belt is continuously displaced the belt so as to move the mat downstream along a downstream leg of the path. The mat on the belt, then consolidated with a high-pressure water-jet treatment, and further processed.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: July 19, 2011
    Assignees: Reifenhauser GmbH & Co. KG Maschinenfabrik, Fleissner GmbH
    Inventors: Sebastian Sommer, Willi Liebscher
  • Publication number: 20080220161
    Abstract: A spunbond web is made by extruding a multiplicity of hot thermoplastic filaments, passing the filaments along an upstream stretch of a path, cooling and stretching the filaments as they move along the upstream stretch of the path, and depositing the cooled and stretched filaments at a downstream end of the upstream stretch on a foraminous belt such that the filaments form a mat thereon. The belt is continuously displaced the belt so as to move the mat downstream along a downstream leg of the path. The mat on the belt, then consolidated with a high-pressure water-jet treatment, and further processed.
    Type: Application
    Filed: March 6, 2008
    Publication date: September 11, 2008
    Inventors: Sebastian Sommer, Willi Liebscher