Patents by Inventor Stefan Sitzmann

Stefan Sitzmann 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: 20200369927
    Abstract: The invention relates to a release foil comprising a substrate layer, a printed image and a release coating, wherein the the printed image is arranged at least partially between the substrate layer and the release coating, wherein the printed image includes at least one dye that is cured by UV radiation, and wherein the release coating includes a polysiloxane that is cured by UV radiation.
    Type: Application
    Filed: January 18, 2019
    Publication date: November 26, 2020
    Inventors: Sahin SAYGILI, Stefan SITZMANN (deceased), Werner SCHMIDT, Stefan KRÜGEL, Matthias SEELER, Gerald DITTRICH
  • Patent number: 10507632
    Abstract: A packaging film suitable for an outer packaging composed of an optionally release-capable, upstretched, at least monolaminar polyolefin film comprising a) a layer (a) based on a mixture of ?) 20-49% by weight of a polypropylene or of at least one propylene copolymer, or combination thereof, and of ?) 80-51% by weight of at least one polyethylene or ethylene copolymer, and optionally ?) customary auxiliaries, with a layer thickness of ?20 ?m, on at least one surface of the layer (a) a release coating (b) composed of cured polysiloxane, wherein the tensile strength of the polyolefin film in machine direction is at least 6.5 N/cm, measured according to DIN EN ISO 527-3, and outer packagings produced therefrom.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: December 17, 2019
    Assignee: INFIANA GERMANY GMBH & CO. KG
    Inventors: Michael Schuhmann, Stefan Sitzmann, Larissa Zirkel, Harald Gerlacher, Werner Schmidt
  • Publication number: 20180147821
    Abstract: A packaging film suitable for an outer packaging composed of an optionally release-capable, upstretched, at least monolaminar polyolefin film comprising a) a layer (a) based on a mixture of ?) 20-49% by weight of a polypropylene or of at least one propylene copolymer, or combination thereof, and of ?) 80-51% by weight of at least one polyethylene or ethylene copolymer, and optionally ?) customary auxiliaries, with a layer thickness of ?20 ?m, on at least one surface of the layer (a) a release coating (b) composed of cured polysiloxane, wherein the tensile strength of the polyolefin film in machine direction is at least 6.5 N/cm, measured according to DIN EN ISO 527-3, and outer packagings produced therefrom.
    Type: Application
    Filed: January 23, 2018
    Publication date: May 31, 2018
    Applicant: INFIANA GERMANY GMBH & CO. KG
    Inventors: Michael SCHUHMANN, Stefan SITZMANN, Larissa ZIRKEL, Harald GERLACHER, Werner SCHMIDT
  • Publication number: 20180148614
    Abstract: Multilayer polyolefin film comprising a layer sequence of a sealable layer (a) based on a polyethylene component, a layer (b) based on a polymer mixture of 51-85 wt. % of at least one polyethylene and 15-49 wt. % of at least one propylene homopolymer or copolymer and a sealable layer (c) based on a polyethylene component, wherein the melting point of the layer (a) or the layer (c) is at least 5° C. lower than the melting point of the layer (b); the tear propagation capability of the polyolefin film in the machine direction is <5 N, and the tear propagation capability transverse to the machine direction is at least four times higher than in the machine direction, and the tensile strength is >15 N approximately equal manner in machine direction as well as transversally to the machine direction.
    Type: Application
    Filed: January 23, 2018
    Publication date: May 31, 2018
    Applicant: INFIANA GERMANY GMBH & CO. KG
    Inventors: Michael SCHUHMANN, Stefan SITZMANN, Larissa ZIRKEL, Harald GERLACHER, Werner SCHMIDT
  • Patent number: 9872802
    Abstract: A wrapper that opens relatively quietly and wraps a sheetlike hygiene product provided on one side with an adhesive, said wrapper being based on a packaging material in web form and composed of a polymeric film comprising a) at least one heat-sealable layer based on a mixture of at least one C2 or C3 olefin homopolymer or copolymer and not more than 30% by weight, based on the total weight of the layer a), of polybutylene and b) optionally a layer of polyethylene having a density of 0.88-0.94 g/cm3; the layer a), at least in those sections which face the regions of the hygiene product that are provided with the adhesive, has a release coating, and otherwise, at least in the sub-regions which are joined to form edge closures in the form of stripes or lines, has no release coating.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: January 23, 2018
    Assignee: INFIANA GERMANY GMBH & CO. KG
    Inventors: Stefan Sitzmann, Michael Schuhmann
  • Patent number: 9469788
    Abstract: The present invention relates to a predominantly biodegradable double-separating film and comprising at least one carrier layer (a) that is based on at least one biodegradable polymer, and at least one release layer (b) that is based on at least one cured polysiloxane. The curing of said release layer is based, at least partially, on at least one cross-linked monomer or oligomer additive. Said additive also promotes adhesion between the carrier layer (a) and the release layer (b), and has no siloxane groups but does have at least two functional groups, of which at least one is a functional group with at least one carbon double bond. No adhesion-promoting layer is present between the carrier layer (a) and the release layer (b). In addition the invention relates to the use of such a separating film as a removable protection and cover film.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: October 18, 2016
    Assignee: COMMERZBANK INTERNATIONAL S.A., AS SECURITY AGENT
    Inventors: Michael Schuhmann, Kurt Stark, Stefan Sitzmann
  • Publication number: 20140014546
    Abstract: A wrapper that opens relatively quietly and wraps a sheetlike hygiene product provided on one side with an adhesive, said wrapper being based on a packaging material in web form and composed of a polymeric film comprising a) at least one heat-sealable layer based on a mixture of at least one C2 or C3 olefin homopolymer or copolymer and not more than 30% by weight, based on the total weight of the layer a), of polybutylene and b) optionally a layer of polyethylene having a density of 0.88-0.94 g/cm3; the layer a), at least in those sections which face the regions of the hygiene product that are provided with the adhesive, has a release coating, and otherwise, at least in the sub-regions which are joined to form edge closures in the form of stripes or lines, has no release coating.
    Type: Application
    Filed: February 21, 2012
    Publication date: January 16, 2014
    Applicant: HUHTAMAKI FILMS GERMANY GMBH & CO. KG
    Inventors: Stefan Sitzmann, Michael Schuhmann
  • Publication number: 20120213959
    Abstract: The present invention relates to a predominantly biodegradable double-separating film and comprising at least one carrier layer (a) that is based on at least one biodegradable polymer, and at least one release layer (b) that is based on at least one cured polysiloxane. The curing of said release layer is based, at least partially, on at least one cross-linked monomer or oligomer additive. Said additive also promotes adhesion between the carrier layer (a) and the release layer (b), and has no siloxane groups but does have at least two functional groups, of which at least one is a functional group with at least one carbon double bond. No adhesion-promoting layer is present between the carrier layer (a) and the release layer (b). In addition the invention relates to the use of such a separating film as a removable protection and cover film.
    Type: Application
    Filed: March 20, 2012
    Publication date: August 23, 2012
    Applicant: Huhtamaki Forchheim Zweigniederlassung der Hutamaki Deutschland GmbH & Co. KG
    Inventors: Michael Schuhmann, Kurt Stark, Stefan Sitzmann
  • Publication number: 20120093440
    Abstract: A packaging bag includes two long sides, two narrow sides, a top side or roof surface, a bottom side produced from one or more layers of plastics material foils, and a carrying handle including a single-part or multi-part plastics material strip arranged to pass around the packaging bag in a region of the top side.
    Type: Application
    Filed: January 29, 2010
    Publication date: April 19, 2012
    Applicant: HUHTAMAKI FORCHHEIM ZWEIGNIEDERLASSUNG DER HUHTAMAKI DEUTSCHLAND GMBH & CO.KG
    Inventor: Stefan Sitzmann
  • Patent number: 7022197
    Abstract: A process for bonding several layers of plastic film, particularly plastic bags, into a block, where it is supposed to be possible to remove the plastic films or plastic bags form the block individually; the plastic films or plastic bags are bonded together in an edge strip by means of ultrasonic welding.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: April 4, 2006
    Assignee: Huhtamaki Forcheim Zweigniederlassung der Huhtamaki Deutschland GmbH & Co. KG
    Inventor: Stefan Sitzmann
  • Publication number: 20030173016
    Abstract: Process for bonding several layers of plastic film, particularly plastic bags, into a block, where it is supposed to be possible to remove the plastic films or plastic bags from the block individually; the plastic films or plastic bags are bonded together in an edge strip by means of ultrasonic welding.
    Type: Application
    Filed: March 14, 2003
    Publication date: September 18, 2003
    Applicant: Huhtamaki Forchheim Zweigniederlassung der Huhtamaki Deutschland GmbH & Co KG
    Inventor: Stefan Sitzmann