Abstract: This invention relates to papers made with fibrids containing a polymer or copolymer derived from a monomer selected from the group consisting of 4,4?diaminodiphenyl sulfone, 3,3?diaminodiphenyl sulfone, and mixtures thereof. Such papers have high thermal stability and accept ink more readily than papers made solely with aramid fibrids.

Abstract: The present invention relates to secure paper (1), characterized by the fact that it comprises: at least one fiber layer (2); and at least one electronic chip (3) integrated in the fiber layer (2), said chip (3) including a memory (10) in which at least a first key is stored for use in authenticating the secure paper; the chip being configured to spoil, and in particular to delete, the first key in the event of an attempt at forced access to the chip, so as to make it impossible subsequently to authenticate the secure paper (1).

Abstract: The present invention relates to a method for manufacturing a security paper, for security or value documents, that exhibits at least one through opening (12) having characteristic irregularities (14) in the edge region. According to the present invention, a paper web having thin sites in the form of the outline of the desired shape of the at least one through opening (12) is formed on a paper mold, and the paper web dewatered after sheet formation, the region delimited by the thin sites being removed from the paper web by the occurring forces.

Abstract: A magnetic wire includes a magnetic metal wire material having a surface coated with a layer of an insulating material. The magnetic wire has a magnetic coercive force of 30 A/m or less and has a Barkhausen effect.

Abstract: The invention consists in a security paper, as well as the security document obtained with it and the manufacturing process thereof, that combines the security elements called windowed thread with the high contrast single-tone watermark technique. In order to carry out this invention, we make use of the recesses created to cover the thread in the areas where it is visible, which exhibit a greater accumulation of fibres and are therefore opaque areas in the final paper, to insert therein the electrotype or high contrast single-tone watermarks.

Abstract: A security document including a fibrous material formed in a paper machine, in which a security element is incorporated into the security document, including a step consisting in treating the security element, in-line at atmospheric pressure, with a plasma discharge just before it is incorporated into the fibrous material or transferred onto a sheet exiting the paper machine.

Abstract: Applicable to be used to issue notes of legal tender or any other type of document to facilitate its tactile recognition or prevent its falsification. It consists of a sheet of paper in which expanding agents have been inserted, either centered heightwise or near the upper surface and/or lower surface thereof, forming a figure or inscription which, upon application of pressure and heat, either during the paper manufacturing phase or subsequent processes, cause the sheet of paper to expand, thereby forming a curved and continuous embossing on the surface of the document.

Abstract: A method for increasing adhesion between a security element (e.g., a security strip or band) and a fibrous sheet material such as paper is provided. Also provided by way of this invention is a security element laminated to one or more activatable adhesive films, a fibrous sheet material having such a laminated structure contained on or within a surface thereof, or at least partially embedded therein, and a document (e.g., a security document such as a banknote) made from such a fibrous sheet material.

Abstract: A method of fabricating a sheet by papermaking, the sheet including at least one ply of a fiber substrate and at least one ribbon, wherein the ribbon is introduced in a fiber suspension of a vat former papermaking machine enabling the ply to be formed; or in direct contact with the vat former; or in contact with the already-formed ply; the point at which the ribbon is introduced being selected so as to create at least one region of increased thickness or of reduced thickness in the sheet in register with the ribbon, the reduced thickness being due to a reduction in the de-watering of the fiber suspension caused by the ribbon.

Abstract: The invention relates to improvements in security substrates, such as paper, used for making security documents, such as bank notes, having anti-counterfeitable features and in particular to security substrates incorporating an elongate security element and methods of making said substrate. The invention comprises a security substrate for making security documents and the like comprising a fibrous base substrate and an elongate security element at least partially embedded therein. At one surface of the security substrate one portion of the security element is exposed to provide a continuous track along the length of the security element. A plurality of other portions along at least one edge of the security element are partially covered by overlapping regions of the fibrous substrate. The invention further comprises a method of manufacturing such a security substrate.

Abstract: A security sheet that includes an information to be exposed and a preferably fibrous substrate in which is preferably totally embedded a ribbon that has a surface A and a surface B and is strippable along the surface B thereof, the information to be exposed being carried by and/or opposite the surface B of the ribbon, a method for making said security sheet, and a security document or article including such a sheet.

Abstract: A fluorescent fiber and an anti-counterfeiting material have an optical color that varies with irradiation angles of exciting light. The anti-counterfeiting fiber includes at least two components of materials that extend parallel along the longitudinal direction without twisting. At least one component contains photoluminescence material. The distribution of the components makes the anti-counterfeit fiber form a shielding structure for exciting light, and has an orientation structure. The exciting light shielding structure and orientation structure enable, when the anti-counterfeit fiber falls freely into a plane paralleled to the horizontal plane, the existence of at least two irradiation angles of exciting light above the plane paralleled to the horizontal plane, from which exciting light irradiates on the anti-counterfeit fiber respectively. The anti-counterfeit fiber thereby displays obvious visual difference between two different luminescent colors.

Abstract: A recording medium includes a magnetic material and a pulp-fiber, a minimum value of shortest distances between the magnetic material and an edge of the recording medium substantially parallel to the pulp-fiber orientation direction being about 1 mm or more.

Abstract: The present invention relates to a security element (20) for security papers, value documents and the like, having a feature region (24) that selectively influences incident electromagnetic radiation (30). According to the present invention, it is provided that the feature region (24) includes metallic nanopatterns (28) in which volume or surface plasmons are excited and/or resonance effects are caused by the incident electromagnetic radiation (30).

Abstract: Polymer composite films were prepared by solvent casting suspensions of quantum dots (QDs) in cellulose triacetate (CTA) solution. The films were robust and possessed the optical properties characteristic of QDs. Transmission electron microscopy (TEM) images of the films revealed that the QDs were well dispersed within the CTA film matrix. The selective alkaline hydrolysis of QD/CTA films in 0.1N NaOH over 24 hours resulted in the surface conversion of CTA to regenerated cellulose. Optical properties of the films were probed both before and after the hydrolysis reaction using fluorescence spectroscopy, and were found generally unaltered. The cellulose surfaces of the alkaline treated films allow for facile incorporation of the films into paper sheets.

Abstract: The invention relates to high security paper wherein the security feature(s) is/are incorporated into the paper during the manufacturing process using a polymeric film as a carrier for the security feature(s). The invention enables the security feature(s) to be delivered at precise places into security paper used for such diverse applications as bank notes, passport paper, visa paper, security documents, etc. The polymeric film may be a cold water soluble film or hot water soluble film or water insoluble hydrophilic film or a or a non soluble non hydrophilic film or a combination of these films or slit strips of any of these woven or intertwined offline and incorporated into the paper during the paper making process. Alternatively the polymeric film may comprise zone coating or discreet printing or zone extrusion striping or formation of hot water soluble film on preformed cold water soluble film which is then inserted into paper during the paper making process.

Abstract: A composition and method of detecting counterfeit paper currency includes applying a test solution to a paper currency having ink printed thereon. If the paper currency is counterfeit, the test solution causes the ink to release from the paper currency. If the paper currency is genuine, the ink will not release from the paper currency. The test solution may be an aqueous-alcohol solution having a chemical thickener, and preferably includes a de-foaming agent, a bactericide/fungicide and a fragrance.

Abstract: A process for manufacturing a sheet material comprising at least two fibrous plies juxtaposed one on top of the other, including the following steps: a first paper ply is produced by filtration of an aqueous suspension of fibers on the wire of a cylinder mould or of a former; a second paper ply is produced on the wire of a second cylinder mould so as to form at least one recess in the second ply; at least one at least partially transparent element is placed between the two plies that are still wet; and the two plies are joined together so that said at least one recess of the second ply, the at least one at least partially transparent element and the at least one elongate region of zero thickness of the first ply are situated facing one another; then drying the obtained structure.

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 invention concerns a security paper comprising at least two plies of paper, wherein at least one intermediate layer arranged between the two plies of paper comprises at least one element providing the paper with high double folding resistance, such as defined by the NF ISO 5626 standard, the two plies and said intermediate layer being closely assembled. The invention also concerns a method for making said paper whereby the intermediate layer is deposited by spraying.

Abstract: The authenticity of a security document, such as a bank note, is verified by use of a security feature arranged in or on the document, which security feature comprises an antenna arranged to receive EM-radiation from an external energy source; a rectifier arranged to receive electric energy from the antenna and convert it into a rectified current; and an electrochromic display arranged to alter its electrochromic state in response to said rectified current. Hence, a security feature able alter its appearance in response to EM-radiation is provided, which comprises a display that can be given a large variety of two dimensional shapes.

Abstract: The invention relates to improvements in paper, and in particular to the use of watermarks and/or embossings for strengthening paper sheets and documents made therefrom. The invention therefore provides a sheet of paper having at least three corners and three sides joined at said corners, wherein corner reinforcing watermarks are provided at each of said corners. Alternatively, or in addition, corner reinforcing embossings are provided at each of said corners.

Abstract: The present invention relates to a crumple-resistant security sheet comprising fibers; an anionic polymer in a proportion lying in the range 5% to 45% by dry weight relative to the total dry weight of the fibers, and presenting a glass transition temperature greater than 40° C.; and a main cationic flocculation agent in a quantity lying in the range 1% to 5% by dry weight relative to the total dry weight of the fibers.

Abstract: The present invention relates to a security film comprising a fibrous substrate incorporated at least partially in which is a security strip that comprises at least one security element and that extends between two edges of said fibrous substrate, said security strip being made of paper and comprising an adhesive.

Abstract: Disclosed is security paper including a plurality of dyed security fibers having wavelength-dependent color changes embedded therein, in which each of the plurality of dyed security fibers is composed of fluorescent balls formed of a fluorescent substance producing a light-mission response at a predetermined wavelength, a security fiber containing the fluorescent balls, and a dyed layer formed on the outer surface of the security fiber using a material producing an light-mission response at a predetermined wavelength.

Abstract: There is proposed a security document comprising a security element, wherein the security element is of such a configuration that it can be determined by means of the sense of human touch. For that purpose either the surface nature of various surface regions can be selected differently so that the configuration and size of the different surface regions can be determined by the human sense of touch. Another possibility is for the substrate of the security document to be provided with suitably shaped openings which can be identified by means of the human sense of touch. A combination of different tactile security elements of that kind is also described.

Abstract: The present invention relates to an article formed from at least one ply of fibrous material comprising at least one region of zero thickness, characterized in that said region is covered on at least one of its faces with an at least partly transparent or translucent structure placed so as to reveal a transparent or translucent window in the paper.

Abstract: The present invention relates to a sheet material comprising at least one first layer defining an outer surface of the sheet material and having at least one first color, at least one second layer comprising at least one watermark and having at least one second color, the first and second colors having at least different saturations and/or hue angles.

Abstract: A security paper or board product carrying micro or nano structures such as diffractive optical elements is formed in which the diffractive structures are integrated into the security paper or board product in the manufacturing process. A security package carrying diffractive structures is manufactured wherein diffractive structures are integrated into the security package at a manufacturing stage of the security package material. A security package contains authentication information in the form of diffractive structures. The diffractive structures are included in the security package in at least in one of the following forms: as embossed in the package material, as part of the size or paste or resin used in the manufacturing process of the security package, or as part of the ink used in printing the security package or the security package material.

Abstract: A wet process for manufacturing a fibrous ply on a forming fabric of a paper machine, including a stack of fabrics, the stack of fabrics having a surface fabric and at least one under-fabric, these being superposed, the fibrous ply having at least one element of a given thickness, wherein it includes the following step: formation of the ply by the dewatering of an aqueous fiber-based suspension on the forming fabric, the stack of fabrics of which includes a reduced dewatering region compared with the first under-fabric, in at least one under-fabric and/or beneath the surface fabric, the reduced dewatering region being in correspondence with the position that the element will have.

Abstract: A process for manufacturing a material in sheet form, comprising at least one fibrous layer and a plurality of security and/or decorative elements, the process comprising at least one of the following steps: the security and/or decorative elements are sprayed onto one face of the fibrous layer, which is running along a predetermined direction, especially when the fibrous layer is still wet, so as to form at least one continuous pattern having at least one edge, approximately along the run direction, not entirely parallel to the run direction, and a pattern comprising a succession of separate zones, and security and/or decorative elements of at least two different types and/or having a variable concentration are sprayed onto one face of the fibrous layer, especially when it is still wet.

Abstract: A manufacturing method of a security paper material, in particular for labelling and packaging, comprising the steps of forming a paper sheet from a wet cellulose fibre pulp and providing the paper sheet with electronic chips; the chips are introduced into the paper sheet being formed during the transformation step of the pulp into paper and are deposited directly onto the wet pulp and at least partially embedded in the pulp. Optionally, an auxiliary paper sheet is coupled to the paper sheet provided with the chips so that the chips are incorporated between the two sheets.

Abstract: A composition comprising an organic fluorophore having a structure of: or a derivative thereof; as well as articles of manufacture marked with the fluorophore, methods for marking articles with the fluorophore, and methods for producing a fluorescent fiber.

Abstract: The invention concerns a structure (1) comprising: a least one fibrous material substrate (2), optionally at least one surface layer deposited on one surface of the substrate, a plurality of heterogeneous elements (3) of the substrate and/or of the optional surface layer, dispersed randomly within the substrate and/or the optional surface layer, at least one authenticating and/or identifying information having a relationship with at least one spatial and/or physical feature of part at least of said heterogeneous elements.

Abstract: The invention relates to an optically variable security paper for the production of documents of value which comprises a cellulose-containing substrate which comprises core/shell particles, to processes for the production of a security paper of this type and to the use thereof for the production of documents of value.

Abstract: The invention relates to a security paper for the production of documents of value which comprises a flat cellulose-containing substrate with a polymeric window included therein, to processes for the production of a security paper of this type and to the use thereof for the production of documents of value.

Abstract: Security paper adapted to resist fraudulent alteration of toner-printed information thereon and to make such alteration or attempts at alteration evident has a maximum Scott-Bond strength of 150 J m?2; a Bendtsen roughness of not more than about 150 ml min?1; and is size press or otherwise treated with a thermally-softenable polymer composition, for example acrylic polymer or copolymer, a polyvinyl acetate polymer, a vinyl acetate/ethylene copolymer, or a vinyl acetate/vinyl chloride/ethylene terpolymer. Preferably the paper has filler content of about 15% to about 20% by weight.

Abstract: The present invention provides a method of manufacturing an article comprising a fiber layer and at least one electronic chip, the fiber layer being formed by depositing fibers on a surface immersed in a dispersion of fiber material. The method includes the following step: Using an elongate flexible support to bring the electronic chip into contact with the fiber layer that is being formed.

Abstract: The present invention provides a method of manufacturing an article comprising a fiber layer and at least one electronic chip, the fiber layer being formed by depositing fibers on a surface immersed in a dispersion of fiber material. The method includes the following step: Using an elongate flexible support to bring the electronic chip into contact with the fiber layer that is being formed.

Abstract: An apparatus for manufacturing security paper, comprising at least one main forming roller, which is provided with a lower portion or forming portion, which is arranged inside a forming box that contains a paper paste, an upper portion or deposition portion, which is arranged below a collecting wire that can move along an advancement direction and is designed to receive, at a collecting face, the sheet formed on the forming roller, and a device for depositing security elements that is arranged upstream of the main forming roller along the advancement direction of the collecting wire and is adapted to deposit the security elements at the collecting face.

Abstract: Applicable to be used to issue notes of legal tender or any other type of document to facilitate its tactile recognition or prevent its falsification. It consists of a sheet of paper (1) in which expanding agents have been inserted (2), either centered heightwise or near the upper surface and/or lower surface thereof, forming a figure or inscription which, upon application of pressure and heat, either during the paper manufacturing phase or subsequent processes, cause the sheet of paper (1) to expand, thereby forming a curved and continuous embossing (3) on the surface of the document.

Abstract: The invention relates to improvements in paper, and in particular to the use of watermarks and/or embossings for strengthening paper sheets and documents made therefrom. The invention therefore provides a sheet of paper having at least three corners and three sides joined at said corners, wherein corner reinforcing watermarks are provided at each of said corners. Alternatively, or in addition, corner reinforcing embossings are provided at each of said corners.

Abstract: The present invention relates to a security feature for security papers, value documents and the like having an acid-labile feature substance as the core and a shell consisting substantially of metal oxide, the security feature exhibiting greater stability against the action of acids compared with the acid-labile feature substance.

Abstract: Watermarked paper, preferably shadow-watermarked paper is produced in conventional manner and then size-press dyed using a pigment dyestuff composition. This results in unusual and attractive decorative effects as a result of preferential dye take-up in parts of the watermarked areas, resulting in enhanced contrast between watermarked and non-watermarked areas of the paper. The invention finds particular application in wallpaper base, but can also be used in decorative or security papers. The pigment dyestuff can be fluorescent for security paper use.

Abstract: The invention relates to a marking substance for security documents of the kind difficult to discern by counterfeiters. The preferred marking substance is polyethylene dioxythiophene polystyrene sulfonate and, more particularly, PEDT/PSS of the CPP105 formulation.

Abstract: Paper incorporating a wide elongate impermeable element with regions at least partially exposed at one surface of the paper at two sets of windows at spaced locations has its windows formed by two sets of raised portions on the support surface of the papermaking machine. A first set of raised portions has a width transverse to the machine direction in which the paper travels during manufacture which is narrower than the width of the elongate element. A second set of raised portions has a width transverse to the machine direction which is at least equal to the width of the elongate element. During manufacture of the paper the elongate element is brought into contact with both sets of raised portions, with edges of the elongate element being supported by the second set of raised portions.

Abstract: Polymer composite films were prepared by solvent casting suspensions of quantum dots (QDs) in cellulose triacetate (CTA) solution. The films were robust and possessed the optical properties characteristic of QDs. Transmission electron microscopy (TEM) images of the films revealed that the QDs were well dispersed within the CTA film matrix. The selective alkaline hydrolysis of QD/CTA films in 0.1N NaOH over 24 hours resulted in the surface conversion of CTA to regenerated cellulose. Optical properties of the films were probed both before and after the hydrolysis reaction using fluorescence spectroscopy, and were found generally unaltered. The cellulose surfaces of the alkaline treated films allow for facile incorporation of the films into paper sheets.

Abstract: A fibrous security substrate for use in producing documents includes at least one aperture extending therethrough and contains an elongate impermeable element at least partially embedded therein such that at least one edge thereof is exposed in the aperture.

Abstract: A method and apparatus for incorporating feature substances into a still moist but already sufficiently consolidated paper web provides for directing a feature substance suspension onto the surface of the paper web as a laminar jet with low jet pressure. A special pressure control circuit ensures that the jet pressure is always constant regardless of the number of parallel feature substance suspension jets directed onto the paper web. This makes it possible to incorporate a great variety of line codings in paper under the same process conditions without any visible changes in fiber structure occurring in the paper.

Abstract: The invention relates to a security paper with at least two types of mottled fibers, which differ in terms of their luminescent characteristics and form a code. In each case one type of mottled fibers is present in a defined subarea of the security paper, and the code is represented by the defined geometric arrangement of the subareas on the security paper and/or by the presence or absence of mottled fibers of a specific type.