GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH

A method is provided for producing a green paper for producing a gas diffusion layer (GDL) for a fuel cell. A use is described of an accordingly produced gas diffusion layer (GDL) in a fuel cell. A first paper web is loaded with metal powder and/or metal fibers, and a microporous layer (MPL) is in the form of at least one coating is applied onto the paper web. The paper web is then subjected to a binder removal process, a sintering process, a coating process, atomic layer deposition (ALD) using thermal ALD methods, and optionally additional process steps in order to obtain the final GDL. After the sintering process, all of the organic components of the green paper are pyrolyzed and thus no longer contained in the GDL, and the GDL consists virtually exclusively of a metal framework.

A transfer security element material has an intermediate carrier and a plurality of security elements for value documents. The security elements are arranged on the intermediate carrier and are detachable from the intermediate carrier and permanently transferred to a value document substrate upon their transfer. The security elements are present on the intermediate carrier separated from one another at least by transfer predetermined breaking points as separately transferable security elements. The security elements have separation protection predetermined breaking points not arranged parallel to the transfer predetermined breaking points, which are to obstruct a separation of the transferred security element from the value document substrate without destroying the security element. The security elements include a central decorative area and a transparent edge area surrounding the decorative area, and the separation protection predetermined breaking points are formed in the transparent edge area without extending into the decorative area.

An optically variable surface pattern which is designed to provide a multi-color representation when viewed from at least one predefined viewing angle and includes a multiplicity of surface elements which are provided with relief structures, at least one of the relief structures having nanostructures that act as color filters. The relief structures are selected from a set of at least four relief structures that differ from one another, each of which generating a color impression corresponding to a predefined monochromatic color when viewed from the predefined viewing angle, and each of the monochromatic colors corresponding to a different basic color. The surface elements are dimensioned such that, in at least one subregion of the surface pattern, when viewed from the at least one predefined viewing angle, a color impression corresponding to a mixed color that differs from the predefined basic colors can be generated.

A sensor element for checking the authenticity of a planar data carrier, in particular a banknote, has a spin resonance feature. The sensor element contains a magnetic core having an air gap, into which the planar data carrier can be inserted for authentication and which defines an axial direction extending between the adjoining surfaces of the magnetic core, a polarization device for generating a static magnetic flux in the air gap, a modulation device for generating a time-varying magnetic modulation field in the air gap, and a resonator for exciting the spin resonance feature of the data carrier to be checked. The modulation device is formed by at least one planar coil arranged in the air gap, which planar coil has one or more turns about the axial direction of the air gap in one plane. The disclosure also relates to a checking device having such a sensor element.

A method for detecting an object in a search image, includes: a) providing a pattern vector which describes the object by means of coordinates of characteristic pixels; b) shifting the pattern vector over different positions of the search image; c) determining a success value at each of the different positions; and d) detecting the object at the position on the basis of the success value, wherein each characteristic pixel is assigned a first direction and a second direction that differs from the first direction. The first and second overall intensity values of one-dimensionally arranged pixels are determined in the first and second directions, respectively. A difference value between the first and second overall intensity values is determined in each case, and the success value is determined on the basis of the respective difference values.

A security element is arranged to safeguard valuable articles, featuring a motif layer based on a liquid-crystal material that forms a latent motif. The security element includes a first embossing varnish layer on a carrier film, with a motif layer partly on this varnish, based on nematic liquid crystals. A second embossing varnish layer covers the surface. The facing surface of the first varnish has an embossing with at least two regions featuring different alignment structures, creating a second latent motif. These alignment structures include an aperiodic grating with varying grid spacing. The motif layer, forming a first latent motif, overlaps the second latent motif regions. The nematic liquid-crystal material is aligned by the motif-forming regions, producing a discernible motif when viewed through a polarizer. The second varnish layer also has an embossing for a micro-optical relief structure and reflection-enhancing coating.

A banknote processing device, includes a banknote compartment configured to receive a plurality of banknotes to be processed and a drive unit configured to move the banknotes out of the banknote compartment such that a filling state of the banknote compartment changes over time. The banknote processing device has an acquisition unit configured to acquire a present filling state of the banknote compartment, the present filling state being representative for an amount of banknotes located within the banknote compartment, wherein the acquisition unit is configured to generate an output signal based on the present filling state of the banknote compartment. A method is provided for monitoring a filling state of a banknote processing device.

A method is provided for manufacturing pigments of defined size and shape, and to pigments manufactured accordingly. The method has the steps of: a) producing a three-dimensional surface structure on a substrate, where surface regions are formed each having a gradient extending obliquely to a base level of the surface structure, and are arranged in columns which are offset relative to one another; b) applying a pigment material layer on the surface structure; c) releasing the pigment material layer from the surface structure and producing pigments.

A device for producing an electrode stack containing flat electrode elements includes a stacking wheel, which is mounted to rotate about a stacking wheel axis and has a plurality of stacking wheel fingers, which define respective intermediate spaces for receiving the electrode elements, and a wiper unit, which is designed to remove the electrode elements one after the other from the respective intermediate spaces through interaction with a rotational movement of the stacking wheel about the stacking wheel axis. The device furthermore includes a receiving unit for successively receiving the electrode elements removed from the intermediate spaces. The receiving unit has a base structure, on which the electrode elements received in the receiving unit can be stacked, and a delimiting element, which forms an end stop for the electrode elements received in the receiving unit and which is arranged statically in relation to the stacking wheel axis.

The invention relates to a transparent conductive film, comprising a transparent substrate, wherein a conductive metallization is formed on the main surface thereof in the form of a close-meshed, continuous network with a plurality of openings having different geometric shapes, wherein the transparent conductive film is additionally provided with a full-area transparent coating reflecting IR radiation.