Bundesdruckerei Gmbh

Covestro Deutschland Ag

Bayer Materialscience Ag

Bundesdruckerei Gmbh Kommandantenstrasse 18

Jens Ehreke

Michael Knebel

Manfred Paeschke

Rainer Seidel

Heinz Pudleiner

Klaus Meyer

Oliver Muth

Christian Kunath

Harald Hoeppner

Cengiz Yesildag

Thomas Löer

Michael Radtke

Christian Klepzig

Michael Langgassner

Arthur Mathea

Jörg Büchner

Dirk Pophusen

Roland Gutmann

Gerhard Hochenbleicher

André Leopold

Detlef Märtens

Malte Pflughoefft

Mehmet-Cengiz Yesildag

Andre Leopold

Martin Siebert

Andreas Deichsel

Per Krüger

Detlef Maertens

Christoph Von Czapiewski

Alexander Mombrée

Thomas Loeer

Thomas Felske

Gabriele Brauer

Peter Stiemert

Tomas Loeer

Gunda Müffelmann

Reinhard Löwe

Jorg Ruckriemen

Karl-Heinz Gärtner

Edward Springman

Stephanie Tietze

Jörg Buchholz

Jeffry Gahlbeck

Andreas Jankowski

Boris Antonczik

Marco Graetz

Thomas Stirner

Reinhard LÖWE

Jörg RÜCKRIEMEN

Hans-Peter Seijo-Bollin

Harald Dittrich

A method for issuing a virtual document by a first computer system of an issuer, includes creating the virtual document; calculating a hash value of the virtual document; sending a signed entry request including the hash value to a blockchain server; receiving the signed entry request by the blockchain server; and executing, by the blockchain server, program instructions of a program module identified by the signed entry request, wherein the execution of the program instructions includes checking the signature of the entry request, using a public cryptographic key of the issuer registered in the blockchain, and, if the signature is valid, generating an additional block of the blockchain for the issue of the virtual document, wherein the generated block includes an entry associated with the program module and including the first hash value.

Issuing virtual documents in a block chain

The invention relates to a method for making a structure with at least a first polymer layer and a second polymer layer, each made from a polycarbonate polymer based on bisphenol A, and in between the first polymer layer and the second polymer layer an intermediate layer being arranged, comprising the following steps: a) the intermediate layer is applied at least on a partial region of the first polymer layer, b) optionally the intermediate layer is dried, c) the first polymer layer is coated on the side, on which the intermediate layer is arranged, with a liquid preparation comprising a solvent or a mixture of solvents and a polycarbonate derivative based on a geminally disubstituted dihydroxydiphenyl cycloalkane, the preparation covering the intermediate layer, d) optionally a drying step is made after step c), e) after step c) or step d), the second polymer layer is placed on the first polymer layer, covering the intermediate layer, f) the first polymer layer and the second polymer layer are laminated with each other under pressure, at a temperature from 120&#xb0; C. to 230&#xb0; C. and for a defined time.

Method for producing a polycarbonate layered composite

The invention relates to the use of a preparation comprising A) 0.1 to 20 wt % of a binding agent with a polycarbonate derivative based on a geminally disubstituted dihydroxydiphenyl cycloalkane, B) 30 to 99.9 wt % of an organic solvent or of a mixture of solvents, C) 0 to 10 wt %, referred to dry mass, of a dye or of a mixture of dyes, D) 0 to 10 wt % of a functional material or of a mixture of functional materials, E) 0 to 30 wt % of additive and/or auxiliary substances, or of a mixture of such substances, the relative amounts of the components A) to E) always totaling 100 wt %, as an ink jet printing dye.

Method for the production of a polycarbonate laminate

The invention relates to a method for the production of a book cover insert () and to a method for the production of a book-type security document () and also to a book cover insert and a book-type security document, in which at least one data carrier () that can be operated contactlessly is provided in a book cover insert (). (In this respect).

Method for the production of a book cover insert and book-type security document and book cover insert and book-type security document

Latent-reactively glued TPU/PC layer materials

A method and a device produce an individualized hologram from a generated light beam. According to the method, the light beam is individually modulated in a spatial light modulator, a holographic recording material is arranged relative to a holographic master, and the individually modulated light beam is guided in such a manner that at least part of the individually modulated light beam is refracted and/or reflected on the holographic master and an interference pattern representing the individualized hologram is produced in the holographic recording material. The individually modulated light beam is displaced relative to the holographic recording material and the holographic master to scan the entire holographic master. The recording material is arranged so as to rest on a cylindrical drum or a cylindrical drum segment and the drum is rotated about a drum axis of the drum or the drum segment during scanning of the holographic master.

Method and device for individual holographic drum exposure

A method produces colored individualized holograms for use as security elements for documents, and to a device for producing individualized holograms. The method generates light formed of different colors, spatially modulates the light, color by color, in an individual manner, optically guides the modulated light such that the light is at least partially refracted and/or reflected on a holographic master and is superposed in a holographic recording material with the modulated non-refracted and/or reflected light, and records the hologram. The light is modulated, color by color and at the same time, by a plurality of spatial light modulators. Every color is associated with its own spatial light modulator and a plurality of monochrome modulated light beams of the plurality of colors is combined in a collinear manner prior to refraction and/or reflection on the holographic master and the superposition in the recording material to give a multicolor exposure light beam.

Method and device for producing colored individualized holograms

The invention relates to a data support () with a core layer () and at least one adjacent layer (), laminated to the core layer and a corresponding production method, said core layer being embodied from a holographic data store in the form of a volume hologram (). The surface () facing the core layer, on the layer directly adjacent to the core layer, has a roughness (), before lamination to the core layer, which affects the wavelength shift of the image reconstructed by the volume hologram.

Holographic data support and method for production thereof

The invention relates to a method for the production of a security document in addition to a security document comprising at least one security cambric () and at least one transponder unit () which is fully encompassed by laminated layers () forming a laminated layer sheath.

Method for the production of a book-type security document and a book-type security document

Growing community of inventors

Berlin, Germany

Jens Ehreke