Patents by Inventor Matthias Gschwandtner

Matthias Gschwandtner 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).

  • Method and device for cleaning spinnerets while producing cellulose spunbonded nonwoven fabric
    Patent number: 11873581
    Abstract: The present invention relates to a method for cleaning a spunbonding spinneret for the production of cellulosic spunbonded nonwoven fabric from a solution of cellulose in an aqueous organic solvent by extruding the solution through nozzle holes of the spunbonding spinneret to form filaments and stretching the filaments in the direction of extrusion by means of a gas stream, during which method contaminations containing cellulose will accumulate on the spinneret surface. The method according to the invention comprises the steps of: a) spraying the contamination with an aqueous fluid precipitating the cellulose; and b) detaching and carrying away the contamination by means of the gas stream.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: January 16, 2024
    Assignee: Lenzing Aktiengesellschaft
    Inventors: Ibrahim Sagerer-Foric, Markus Malzner, Matthias Gschwandtner
  • METHOD AND DEVICE FOR CLEANING SPINNERETS WHILE PRODUCING CELLULOSE SPUNBONDED NONWOVEN FABRIC
    Publication number: 20220316096
    Abstract: The present invention relates to a method for cleaning a spunbonding spinneret for the production of cellulosic spunbonded nonwoven fabric from a solution of cellulose in an aqueous organic solvent by extruding the solution through nozzle holes of the spunbonding spinneret to form filaments and stretching the filaments in the direction of extrusion by means of a gas stream, during which method contaminations containing cellulose will accumulate on the spinneret surface. The method according to the invention comprises the steps of: a) spraying the contamination with an aqueous fluid precipitating the cellulose; and b) detaching and carrying away the contamination by means of the gas stream.
    Type: Application
    Filed: May 14, 2020
    Publication date: October 6, 2022
    Inventors: Ibrahim Sagerer-Foric, Markus Malzner, Matthias Gschwandtner