Patents by Inventor Andreas Demmel

Andreas Demmel 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: 20230191294
    Abstract: A multi-layered filter medium with a densified layer made of synthetic fibers is useful for filtering liquids. A method for its production involves providing multiple layers, densifying a layer, and joining the multiple layers.
    Type: Application
    Filed: March 16, 2021
    Publication date: June 22, 2023
    Applicant: NEENAH GESSNER GmbH
    Inventors: Fabian NUTZ, Andreas Demmel
  • Publication number: 20230012056
    Abstract: A filter medium is disclosed having a nonwoven layer, which has bicomponent fibres, and a melt-blown layer, which comprises polyester fibres having an average diameter (d1) of less than 1.8 ?m. The thickness of the nonwoven layer is less than 0.4 mm at a contact pressure of 0.1 bar. At least 25% of the polyester fibres of the melt-blown layer have a diameter (d) of less than 1 ?m.
    Type: Application
    Filed: May 24, 2022
    Publication date: January 12, 2023
    Inventors: Andreas DEMMEL, Georg GEISBERGER
  • Publication number: 20220096980
    Abstract: A filter medium for engine air filters contains a support layer and a meltblown layer containing polyester fibres. The filter medium is electrically charged.
    Type: Application
    Filed: January 10, 2020
    Publication date: March 31, 2022
    Applicant: NEENAH GESSNER GMBH
    Inventors: Georg GEISBERGER, Andreas Demmel
  • Patent number: 11198079
    Abstract: The invention relates to a filter material comprising a carrier material that is impregnated on one side with a thermally pre-crosslinked binder system (VB) and on the other side with a thermally crosslinkable but un-crosslinked binder system (UB). The filter material is characterised by improved deformability and a very good level of heat sealability, particularly using ultrasound, and a low pressure differential particularly when filtering high-viscosity liquids.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: December 14, 2021
    Assignee: NEENAH GESSNER GmbH
    Inventors: Werner Hörl, Christoph Häringer, Andreas Demmel
  • Publication number: 20210070976
    Abstract: The present invention relates to a resin binder composition, a filter medium comprising the resin binder composition as well as related methods and uses.
    Type: Application
    Filed: September 6, 2019
    Publication date: March 11, 2021
    Applicant: NEENAH GESSNER GMBH
    Inventors: Urs Fabian Fritze, Werner Hörl, Andreas Demmel
  • Publication number: 20200398200
    Abstract: The invention relates to a filter medium comprising a nonwoven layer, which has bicomponent fibres, and a melt-blown layer, which comprises polyester fibres having an average diameter (d1) of less than 1.8 ?m. The thickness of the nonwoven layer is less than 0.4 mm at a contact pressure of 0.1 bar. At least 25% of the polyester fibres of the melt-blown layer have a diameter (d) of less than 1 ?m.
    Type: Application
    Filed: January 14, 2019
    Publication date: December 24, 2020
    Inventors: Andreas DEMMEL, Georg GEISBERGER
  • Patent number: 10293290
    Abstract: The invention relates to a filter material impregnated on one side with a binding agent that is in particular suited for gas filtration, wherein the filter material comprises a side that is not impregnated with a binding agent, which side contains a halogen-free and boron-free flame protection means. By means of the filter material according to the invention, a high separation rate and a high dust storage capacity are achieved, whereas the filter material is flame-retardant, and in the event of fire, does not release any toxic decomposition products. The invention further relates to a filter element comprising the filter material according to the invention.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: May 21, 2019
    Assignee: NEENAH GESSNER GMBH
    Inventors: Andreas Demmel, Werner Hoerl
  • Publication number: 20180369730
    Abstract: The invention relates to a filter material comprising a carrier material that is impregnated on one side with a thermally pre-crosslinked binder system (VB) and on the other side with a thermally crosslinkable but un-crosslinked binder system (UB). The filter material is characterised by improved deformability and a very good level of heat sealability, particularly using ultrasound, and a low pressure differential particularly when filtering high-viscosity liquids.
    Type: Application
    Filed: December 8, 2016
    Publication date: December 27, 2018
    Applicant: NEENAH GESSNER GMBH
    Inventors: Werner HÖRL, Christoph HÄRINGER, Andreas DEMMEL
  • Publication number: 20160250574
    Abstract: A filter material for isolating liquids from fluid streams comprises a wetlaid or drylaid non-woven or woven, or an open-cell foam. The two sides of the filter material are impregnated with two different binders in such a way that one side of the filter material has a higher surface energy and thus a shorter drop absorption time than the opposing side.
    Type: Application
    Filed: July 16, 2015
    Publication date: September 1, 2016
    Inventors: Werner HÖRL, Andreas DEMMEL, Christoph HÄRINGER, Jürgen NIENTIEDT
  • Publication number: 20150283487
    Abstract: The invention relates to a filter material in particular for filtering liquids. The filter material is impregnated with a binder on only one side such that the opposite side is free of the binder and the content of the dried binder is 0.5 to 50 wt. % of the total weight of the filter material. Using the filter material according to the invention, a high degree of separation is achieved while maintaining a long service life. The invention further relates to a filter element which comprises the filter material according to the invention. Further aspects of the invention relate to the use of the filter material according to the invention in order to filter liquids and to a method for separating two non-mixable liquids, said liquids being conducted through the filter material according to the invention.
    Type: Application
    Filed: October 17, 2013
    Publication date: October 8, 2015
    Applicant: NEENAH GESSNER GMBH
    Inventors: Andreas Demmel, Christof Keppler, Christoph Haeringer
  • Publication number: 20150273372
    Abstract: The invention relates to a filter material impregnated on one side with a binding agent that is in particular suited for gas filtration, wherein the filter material comprises a side that is not impregnated with a binding agent, which side contains a halogen-free and boron-free flame protection means. By means of the filter material according to the invention, a high separation rate and a high dust storage capacity are achieved, whereas the filter material is flame-retardant, and in the event of fire, does not release any toxic decomposition products. The invention further relates to a filter element comprising the filter material according to the invention.
    Type: Application
    Filed: September 24, 2013
    Publication date: October 1, 2015
    Applicant: NEENAH GESSNER GMBH
    Inventors: Andreas Demmel, Werner Hoerl
  • Publication number: 20140197095
    Abstract: The invention relates to a multi-layer cleanable filter material for gas and liquid filtration, said filter material comprising a filter layer and a substrate layer that follows the filter layer in the flow direction, wherein the filter layer is substantially dendrite-free and consists of a melt-blown fleece made of elastic polymer fibres that has a breaking elongation of at least 100%.
    Type: Application
    Filed: February 9, 2012
    Publication date: July 17, 2014
    Applicant: NEENAH GESSNER GmbH
    Inventors: Andreas Demmel, Ingrid Meyr, Bernd Klausnitzer
  • Publication number: 20130280359
    Abstract: The invention relates to a method for inserting insert parts in an injection moulding die, characterized by the following process steps: Providing the insert parts, receiving the insert parts during the opening process of the injection mould die by means of a suitable device, such as a lever (3), inserting the insert parts in the injection moulding die by moving the device, wherein the movement of the device is carried out by a lever system (4) that is controlled by the movement of the injection moulding die, wherein the device represents a part of the moulding surface (5) when closing the injection moulding die. The invention further relates to executing the injection process and to a device for carrying out the method.
    Type: Application
    Filed: June 19, 2013
    Publication date: October 24, 2013
    Inventors: Andreas DEMMEL, Josef EBNER
  • Publication number: 20120204401
    Abstract: The invention relates to a method for inserting insert parts in an injection moulding die, characterized by the following process steps: Providing the insert parts, receiving the insert parts during the opening process of the injection mould die by means of a suitable device, such as a lever (3), inserting the insert parts in the injection moulding die by moving the device, wherein the movement of the device is carried out by a lever system (4) that is controlled by the movement of the injection moulding die, wherein the device represents a part of the moulding surface (5) when closing the injection moulding die. The invention further relates to executing the injection process and to a device for carrying out the method.
    Type: Application
    Filed: November 4, 2009
    Publication date: August 16, 2012
    Inventors: Andreas Demmel, Josef Ebner