Abstract: An optically variable security element, for security papers, value documents and other data carriers, includes a single or multilayer central body having opposing first and second main surfaces, an arrangement of microlenses on the first main surface of the central body, the microlenses having a refractive effect defining a focal plane, a laser-sensitive recording layer arranged on the second main surface of the central body, a mask layer arranged between the arrangement of microlenses and the laser-sensitive recording layer and outside of the focal plane of the microlenses, and a plurality of micromarks produced in the laser-sensitive recording layer by the action of laser radiation, each micromark being associated with a microlens and being visible when the security element is viewed through the associated microlens. The mask layer comprises a macroscopic gap region that is in register with the plurality of micromarks.

Abstract: A method is for examining a sheet-shaped or card-shaped value document with a security feature having one or more cavities configured in the value document. The width of the cavity or cavities is in at least one respectively specified direction exceeding 10 ?m. Transmission values are established in a locally resolved manner for the transmission of ultrasound in a specified frequency range. In employing the transmission values, it is checked whether a specified number of transmission values is greater than a specified transmission threshold value.

Abstract: An optically variable security element, for security papers, value documents and other data carriers, includes a single or multilayer central body having opposing first and second main surfaces, an arrangement of microlenses on the first main surface of the central body, the microlenses having a refractive effect defining a focal plane, a laser-sensitive recording layer arranged on the second main surface of the central body, a mask layer arranged between the arrangement of microlenses and the laser-sensitive recording layer and outside of the focal plane of the microlenses, and a plurality of micromarks produced in the laser-sensitive recording layer by the action of laser radiation, each micromark being associated with a microlens and being visible when the security element is viewed through the associated microlens. The mask layer comprises a macroscopic gap region that is in register with the plurality of micromarks.

Abstract: A method is for examining a sheet-shaped or card-shaped value document with a security feature having one or more cavities configured in the value document. The width of the cavity or cavities is in at least one respectively specified direction exceeding 10 ?m. Transmission values are established in a locally resolved manner for the transmission of ultrasound in a specified frequency range. In employing the transmission values, it is checked whether a specified number of transmission values is greater than a specified transmission threshold value.

Abstract: The present invention relates to a dewatering screen for manufacturing paper having multi-level watermarks, having a carrier mold (54) that exhibits, in a fractional region, a multi-level relief (30) in the form of the watermark to be produced. According to the present invention, it is provided that the multi-level relief is formed by an injection-molded, perforated (40) watermark insert (30).

Abstract: The present invention relates to a method for manufacturing a security element (12) having a metalized microrelief pattern and a negative pattern in register therewith, in which P) a substrate (20) is provided with an embossing pattern having elevations (24) and depressions (26) that form first and second regions having different first and second height levels, wherein the desired microrelief pattern (28) is introduced into the first regions of the embossing pattern, and the second regions of the embossing pattern are developed in the form of the desired negative pattern, M) the embossing pattern with the first and second regions is contiguously metalized (30), and L) the metalized embossing pattern is impinged on with laser radiation, to selectively remove the metalization (30) in the second regions of the embossing pattern through the action of the laser radiation.

Abstract: The present invention relates to a dewatering screen for manufacturing paper having multi-level watermarks, having a carrier mold (54) that exhibits, in a fractional region, a multi-level relief (30) in the form of the watermark to be produced. According to the present invention, it is provided that the multi-level relief is formed by an injection-molded, perforated (40) watermark insert (30).

Abstract: The present invention relates to a method for manufacturing a security element (12) having a metalized microrelief pattern and a negative pattern in register therewith, in which P) a substrate (20) is provided with an embossing pattern having elevations (24) and depressions (26) that form first and second regions having different first and second height levels, wherein the desired microrelief pattern (28) is introduced into the first regions of the embossing pattern, and the second regions of the embossing pattern are developed in the form of the desired negative pattern, M) the embossing pattern with the first and second regions is contiguously metalized (30), and L) the metalized embossing pattern is impinged on with laser radiation, to selectively remove the metalization (30) in the second regions of the embossing pattern through the action of the laser radiation.

Abstract: The present invention relates to a dewatering screen for manufacturing paper having multi-level watermarks, having a carrier mold (54) that exhibits, in a fractional region, a multi-level relief (30) in the form of the watermark to be produced. According to the present invention, it is provided that the multi-level relief is formed by an injection-molded, perforated (40) watermark insert (30).