Patents by Inventor Winfried Hoffmüller

Winfried Hoffmüller 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: 20230038961
    Abstract: A semi-finished product method with a liquid crystal security feature includes unrolling and transporting a continuous film in a transporting direction and providing on the film a liquid crystal layer containing a substance whose absorption of polarized light depends on its orientation. The method includes at least one of (A) arranging a lacquer layer on the film and embossing it for a first alignment structure, and at least partly covering it with the liquid crystal layer, the first alignment structure able to cause liquid crystal molecules of the liquid crystal layer to align only in a first direction in first regions and only in a second direction, in second regions, and (B) embossing the liquid crystal layer while the liquid crystal layer is uncured providing a second alignment structure to cause liquid crystal molecules to align only in a third direction in third regions and only in a fourth direction, in fourth regions.
    Type: Application
    Filed: July 29, 2022
    Publication date: February 9, 2023
    Inventors: Carlos Carrasco, Beatriz Cerrolaza, Winfried Hoffmüller, Friedrich Kretschmar, Denise Schwab
  • Patent number: 10486455
    Abstract: An apparatus for applying security elements, comprises at least one value document substrate transport device for transporting a value document substrate web, at least one security elements transport device for transporting a security elements carrier band having a plurality of security elements, wherein the security elements carrier band has a first and a second main surface which oppose each other, each security element has a first and a second main surface which oppose each other, each security element is arranged with its first main surface on the first main surface of the security elements carrier band, and each security element has adhesive properties at its second main surface, wherein the apparatus has an application region in order to apply the security elements with their second main surface onto the value document substrate web. A security elements carrier band and a value document involve the apparatus.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: November 26, 2019
    Assignee: GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH
    Inventors: Josef Schinabeck, André Gregarek, Winfried Hoffmüller, Christoph Gebauer, Christoph Mengel, Mario Keller, Matthias Pfeiffer
  • Publication number: 20180141370
    Abstract: An apparatus for applying security elements, comprises at least one value document substrate transport device for transporting a value document substrate web, at least one security elements transport device for transporting a security elements carrier band having a plurality of security elements, wherein the security elements carrier band has a first and a second main surface which oppose each other, each security element has a first and a second main surface which oppose each other, each security element is arranged with its first main surface on the first main surface of the security elements carrier band, and each security element has adhesive properties at its second main surface, wherein the apparatus has an application region in order to apply the security elements with their second main surface onto the value document substrate web. A security elements carrier band and a value document involve the apparatus.
    Type: Application
    Filed: May 19, 2016
    Publication date: May 24, 2018
    Inventors: Josef SCHINABECK, André GREGAREK, Winfried HOFFMÜLLER, Christoph GEBAUER, Christoph MENGEL, Mario KELLER, Matthias PFEIFFER
  • Patent number: 8968856
    Abstract: The present invention relates to a security element (20) for security papers, value documents and the like having a diffraction pattern that exhibits an embossed relief pattern (24, 26) and a coating layer (28, 32) that increases the visibility of the diffraction effect of the embossed relief pattern (24, 26). According to the present invention, the relief pattern (24, 26) is formed on the basis of a cholesteric liquid crystalline material (24) and the coating layer (28, 32) includes a reflective (28) and/or a high-index layer (32).
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: March 3, 2015
    Assignee: Giesecke & Devrient GmbH
    Inventors: Winfried Hoffmüller, Theodor Burchard
  • Patent number: 8557369
    Abstract: A highly refractive embossing lacquer for producing micro-optic arrangements which contains at least one binding agent which has at least one radiation-curing compound system having one or more organic compounds. The highly refractive embossing lacquer has at least a portion of the organic compounds of the radiation-curing compound system having molecules with at least one polarizable element, so that a polymeric material with a refractive index of greater than 1.5 is formed upon radiation curing. A security element which is produced with at least one micro-optic authenticity feature is also provided. The micro-optic authenticity features permit the production of security elements that are so thin that they can be easily incorporated into value documents.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: October 15, 2013
    Assignee: Geisecke & Devrient GmbH
    Inventors: Winfried Hoffmüller, Marius Dichtl
  • Publication number: 20100109317
    Abstract: The present invention relates to a highly refractive embossing lacquer for producing micro-optic arrangements which contains at least one binding agent which has at least one radiation-curing compound system consisting of one or more organic compounds. The highly refractive embossing lacquer is characterized in that at least a portion of the organic compounds of the radiation-curing compound system consists of molecules with at least one polarizable element, so that a polymeric material with a refractive index of greater than 1.5 is formed upon radiation curing. The invention also relates to a security element which is produced with at least one micro-optic authenticity feature. Micro-optic authenticity features according to the present invention permit the production of security elements that are so thin that they can be easily incorporated into value documents.
    Type: Application
    Filed: February 13, 2008
    Publication date: May 6, 2010
    Applicant: Giesecke & Devrient GmbH
    Inventors: Winfried Hoffmüller, Marius Dichtl