Patents by Inventor Ingrid Ewald

Ingrid Ewald 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).

  • Multi-layer composite for use in an air filter
    Patent number: 9180394
    Abstract: The invention relates to a multi-layer composite for use in an air filter, comprising at least one upstream ply and a support ply that is connected to the upstream ply. The upstream ply is made of a non-woven fabric and has a finer porosity than the support ply. The aim of the invention is to form and further develop a multi-layer composite for use in an air filter, in particular in a filter bag in such a manner that the upstream ply can be connected in a stable and economical manner to the support ply. The invention is characterised in that the upstream ply is embodied as a spun bonded non-woven, the continuous filaments of which are at least partially twisted or interwoven with the support ply.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: November 10, 2015
    Assignee: CARL FREUDENBERG KG
    Inventors: Heiko Manstein, Robert Groten, Anthony Hollingsworth, Ingrid Ewald, Joachim Hendler, Klaus Veeser
  • MULTI-LAYER COMPOSITE FOR USE IN AN AIR FILTER
    Publication number: 20100119794
    Abstract: The invention relates to a multi-layer composite for use in an air filter, comprising at least one upstream ply (1) and a support ply (2) that is connected to the upstream ply. The upstream ply (1) is made of a non-woven fabric and has a finer porosity than the support ply (2). The aim of the invention is to form and further develop a multi-layer composite for use in an air filter, in particular in a filter bag in such a manner that the upstream ply can be connected in a stable and economical manner to the support ply. Said invention is characterised in that the upstream ply (1) is embodied as a spun bonded non-woven, the continuous filaments (3) of which are at least partially twisted or interwoven with the support ply (2).
    Type: Application
    Filed: March 13, 2008
    Publication date: May 13, 2010
    Applicant: CARL FREUDENBERG KG
    Inventors: Heiko Manstein, Robert Groton, Anthony Hollingsworth, Ingrid Ewald