Protective element for polygraphic products and fraud-proof polygraphic product

FIELD: physics.

SUBSTANCE: protective element is proposed comprising luminescent regions forming latent colour images visible when irradiated by exciting radiation of UV-band, made with inks containing nanocrystalline materials based on quantum dots. One part of the image is characterized by the spectral composition of the radiation consisting of one narrow-band line, and the other part of the image is characterized by the spectral composition of the radiation consisting of at least two narrow-band lines. The luminescent colours of the mentioned images are identical when viewed with the naked eye, but are different when viewed through the narrow band colour filters that ensure the selection of the spectral composition of the luminescent radiation. The stated task is also solved by the polygraphic product which comprises a protective element characterized above.

EFFECT: creation of a reliable protective element, the authenticity of which can be verified visually with the help of simple technical means.

5 cl, 2 dwg

 



 

Same patents:

FIELD: textiles, paper.

SUBSTANCE: invention relates to marked paper products. Described is a method of production of a marked paper product , using irradiation of the area of the paper product with an electron beam with a dose of 0.10 Mrad to about 5 Mrad, where the electrons have the energy of about 0.25 MeV to 10 MeV. The irradiation is carried out under the conditions selected to change the functionalisation of the specified area of the paper product. The said area may be made in the form of a "watermark" or a symbol.

EFFECT: invention provides the marking on the paper products, which is invisible for the naked eye, which is difficult to copy without enough sophisticated equipment, which makes it difficult to counterfeit.

7 cl, 5 dwg

FIELD: physics.

SUBSTANCE: disclosed is a multilayer polymer material with a raster structure, having a transparent polymer layer with a micro-raster relief structure in form of spherical lenses and a superimposed transparent polymer layer with printed raster. The layer with printed raster lies at a distance from the surface of the lens raster close to the focal distance of its lenses. The material is made with micro-image raster with resolution of 10-20 mcm. Regions are selected in the field of the printed raster, said regions forming latent images, inside of which the orientation of the raster grid differs from the orientation of the raster grid outside said regions by an angle ranging from 1 to 20 degrees. The latent images become visible upon superimposing the printed raster with the lens raster to form different visual effects.

EFFECT: improved security of articles.

3 dwg

FIELD: textile, paper.

SUBSTANCE: polymer sandwich element for paper, which has optically variable effect, is made in the form of a sandwich polymer structure containing at least one layer with microraster relief structure. It has an additional layer with printed or embossed raster of microimages, which is spatially combined with microraster relief structure. Microraster structure is made in the form of raster of spherical transparent polymer lenses or prisms or raster of Fresnel diffraction polymer structures. Printed microimages located in nodes of the printed raster consist of elements of different colours with diametre of 20-100 mcm, which are located at the distance of 40-400 mcm from each other. Mutual location of colourful elements in nodes of the printed raster is discernible in different places of a representational printed field. Inside the defined areas the mutual location of colourful elements differs from mutual location of elements outside the defined areas.

EFFECT: invention allows increasing protection degree of products with protective elements without any increase in prime cost of their production process.

3 cl, 4 dwg, 1 ex

FIELD: textiles, paper.

SUBSTANCE: method of papermaking and the method of production of the protecting element are proposed. The protrusions or recesses in the form of a light watermark are formed on a paper, and these protrusions or recesses are sealed. On some parts of the paper surface, containing the recesses, a paint layer with a negative image is applied. The paint layer covers no more than 80% of the recesses surface. The protecting element is a composite image consisting of protrusions or recesses formed on the paper in the form of a light watermark, and a paint layer with a negative image applied on these protrusions or recesses, covering not more than 80% of the recesses surface.

EFFECT: elimination of difficulties connected with printing and processing of printed products, simplification of identification of the watermark while maintaining its protective properties.

5 cl, 5 dwg

FIELD: textiles, paper.

SUBSTANCE: method of manufacturing a sheet material comprising at least two superimposed fibrous layers, including the following steps: the first paper layer is produced, having at least one elongated zone of zero thickness, by means of filtering of the aqueous suspension of fibers on the grid of the first drum or farmer. And in the process of formation of the said layer, a transparent element is at least partially inserted into it. And the said at least partially transparent element is located at least in the said elongated zone of zero thickness, the second paper layer is produced on the grid of the second drum to form at least one recess in the said second layer, both layers are combined so that at least one recess of the second layer is placed in front of the said at least one elongated zone of zero thickness of the first layer comprising at least partially transparent element, with the formation of the window at this time, and the structure thus obtained is dried.

EFFECT: improvement of the method.

43 cl, 7 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of sheet material composed of, at least, two superimposed fibrous layers. Proposed method comprises the following steps. First paper layer is made with, at least, one elongated zero-thickness zone by filtering water suspension at first drum screen. Second paper layer is made at second drum screen to make, at least, one recess in second layer. At least, one transparent element is arranged between two still wet layers to bind both layers so that said recess of second layer, one said transparent element and said elongated zero-thickness zone of first layer are opposed. Made structure is dried.

EFFECT: sheet material with protective element without structure peeling.

43 cl, 6 dwg

Covered instrument // 2448840

FIELD: printing.

SUBSTANCE: invention relates to a covered instrument, in particular, to a banknote, bank card, identification card, certificate, passport, security or certificate. The document contains a translucent carrier substrate made of paper and/or plastic, and at least one protective element applied on the carrier substrate or embedded in the carrier substrate which when seen from at least one side of the covered instrument in transmitted light shows at least one first image and simulates the presence of at least one first watermark in the carrier substrate. At least in some areas the document has at least one layer simulating first watermark, giving it unexpected optical effects in comparison with protective elements with conventional water marks.

EFFECT: document is provided, which is especially hard-to-copy, having simulated effect of the watermark using the protective element.

38 cl, 8 dwg

FIELD: textile, paper.

SUBSTANCE: counterfeit-proof paper comprises a transparent, at least at some areas, film element, which is freely accessible, at least at some areas, via counterfeit-proof paper. The film element is connected to counterfeit-proof paper by means of an adhesive layer, which is highly transparent and clear in the region of freely accessible areas. The adhesive layer for at least one of freely accessible areas includes a groove, which substantially covers this area surface. The groove in the form of a freely accessible area has an adhesive layer, which is 1-2 mm less or 1-2 mm more than this area. The adhesive layer in the area of at least one of freely accessible areas, apart from the groove, has an ornamental area, on which the adhesive layer is applied in the form of ornaments, symbols or a code. Also a film elements is proposed, and a method to manufacture counterfeit-proof paper or a valuable documents (its version).

EFFECT: improved counterfeit protection of paper.

70 cl, 20 dwg

FIELD: physics.

SUBSTANCE: protected document comprises structural layer and first and second diffraction relief structures. Note here that said relief structures, if seen parallel with structural layer plane, stay at different levels of protection element. Note also that first relief structure borders first reflecting layer, while second relief structure borders second partially reflecting layer. Besides, if spectator faces first reflecting layer, second data generated by second relief structure is partially hidden, while, if spectator faces second reflecting layer, partially hidden is first data generated by first relief structure.

EFFECT: higher degree of protection.

15 cl, 26 dwg

FIELD: textile, paper.

SUBSTANCE: structure is intended for secured and/or valuable documents. It contains at least one substrate of fibre material, optionally, at least one surface layer applied onto one surface of substrate. At the same time the specified surface layer comprises coating or surface pigments and at least one binder. It also contains multiple various elements of substrate and/or optionally of a surface layer, distributed in a random manner inside the substrate and/or optionally the surface layer, and at least one portion of authenticating and/or identifying information is related to at least one spatial and/or physical criterion of at least part of specified various elements. Also a document, a packing facility and a sheet material are proposed with application of the above-specified structure. A method to make such a structure, its versions and a method to authenticate and/or identify the structure are also proposed.

EFFECT: improved extent of protection.

31 cl, 12 dwg

FIELD: printing.

SUBSTANCE: document comprises a substrate and a protective element comprising the first and the second structures contained on the substrate. The substrate also comprises a region which is translucent or even transparent, and within which the first and second structures are located at least partially. The first and the second structures within the transparent area when the document is viewed in reflected light have at least the first and the second colours, respectively, and when the document is viewed in transmitted light, a mutual change of the said first and second colours occurs.

EFFECT: improved protection.

12 cl, 14 dwg

FIELD: physics, optics.

SUBSTANCE: invention relates to protection of documents from falsification and a method of obtaining an image which identifies authenticity of a data medium. When carrying out the method, image pixels are divided into sub-pixel regions, each being a diffraction grating which reflects one of the primary colours. An image is formed by partially breaking down diffraction gratings into sub-pixel regions. The gratings are broken down by laser engraving by modulating intensity, duration and the number of laser pulses using precise positioning of the laser beam on elements of the pixel matrix and special-purpose optical marks.

EFFECT: simplification of the method and forming images in one diffraction layer.

8 cl, 1 dwg

Protective mark // 2555667

FIELD: physics.

SUBSTANCE: protective mark comprises the ply with concealed image and reflecting ply. Note here that play with concealed polarisation image has isotropic and anisotropic areas. Note also that ply with concealed polarisation image can be polarised in phase and represents a quarter-wave plate.

EFFECT: higher level of protection against counterfeit and copying.

11 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to making of microstructure on substrate and includes the steps that follow. (A) Production of donor film by making of embossed structure with ledges and recesses at first film material and application of transfer ply on embossed structure. (B) Making of acceptor film by application of glue ply on second film material. (C) Masking of donor film and acceptor film by glue ply. Note here that transfer ply at embossed structure ledges is glued with glue ply. (D) Transfer of glued sections onto acceptor film owing to separation of donor film from acceptor film. This results in formation of the first micro structure in acceptor film and/or in donor film second micro structure if formed to supplement said first micro structure. Besides, invention relates to application of produced substrate as a component of protective structure and to protective element produced as described above and to protected product.

EFFECT: higher efficiency.

25 cl, 29 dwg

FIELD: printing.

SUBSTANCE: printing protective element is created, comprising at least a first and a second overprints. The first of them is a raster formed by the pixel grid having the form of signs bearing information, and the second is a raster which coincides in position with the first overprint. At that the combination of the first and second overprints is of the form of continuous-tone image, and the information contained in the said signs is at least partially hidden by the second overprint.

EFFECT: method of manufacturing the said protective element is created.

22 cl, 12 dwg

FIELD: physics.

SUBSTANCE: method includes forming an image within a sheet material comprising a monolayer of transparent microspheres, partially immersed in a reflecting layer deposited on a plastic substrate and containing a solid solution of fluorescent or luminiferous coloured particles. A plastic layer and a metal foil layer are successively deposited on a monolayer of microlenses. Pulsed laser radiation forms holes in the foil layer at given points and the plastic layer under the foil, the material of the reflecting layer and the plastic substrate are melted within the laser spot. Microlenses are melted with a compact laser beam within a reduced laser spot and fused with each other. A through-hole is formed in the plastic substrate. Clusters of microlenses with crystals formed thereon with nodules of the coloured particles of the reflecting layer and fused microlenses form points of the colour security image visible in transmitted light and reflected on surfaces of the sheet material by the set of coaxial holes.

EFFECT: easy recognition of a security feature, which provides reliable counterfeit protection of articles.

6 cl, 9 dwg

FIELD: process engineering.

SUBSTANCE: proposed process comprises preparation of substrate and its pre-structuring to make bulges on its face and recesses on its rear that comply with said bulges. Said substrate pre-structuring is performed by embossing via intaglio to apply translucent polymer in the area of bulges or recesses to make micro lenses on at least one side of said substrate. Production of substrate provided with micro lenses involves rigid connection of micro lenses with said substrate which features mirror symmetry relative to mirror plane aligned with mid plane of biconvex micro lenses and parallel with said substrate.

EFFECT: simplified process.

29 cl, 14 dwg

FIELD: physics, optics.

SUBSTANCE: mix comprises first set of pigment scales oriented by magnetic field. Said scales can vary their colour from first to second colour at first change of the angle of vision. Second set of pigment scales not oriented by magnetic field that can vary their colour from said first to third colour at second change of the angle of vision other than the first one. Note here that said first, second and third colours are different colours. Scales of said first and second sets are applied on substrate in binder that makes the mix of scales. Note also that said scales have said first colour if seen on substrate at direct angle. Note also that scales oriented by magnetic field are oriented, in fact, in similar way differing from orientation of scales not oriented by magnetic field so that substrate inclination relative to first axis causes the change in seen colour from said first to said second colour. Substrate inclination relative to second axis perpendicular to first axis causes the change of colour from first colour to said third colour.

EFFECT: coat colouration changing.

8 cl, 10 dwg

Marking element // 2549330

FIELD: chemistry.

SUBSTANCE: marking element is made in form of woven tape, formed by interlacing of main threads from thin poorly melting wire and weft threads of two types: glass threads of white colour and carbon threads of black colour, forming straps with specified combination, read by scanner. Application of fire-resistant threads in woven tape gives advantage of reliability of information storage under conditions of fire impact.

EFFECT: increase of protection of marking element against counterfeiting.

1 dwg

FIELD: physics, optics.

SUBSTANCE: invention relates to a multilayer body having a transparent first layer. In the transparent first layer, a plurality of microlenses, arranged according to a microlens grid, are imprinted in a first region. The multilayer body also has a second layer under the first layer and in a fixed position relative to the first layer and has a plurality of microimages arranged according to a microimage grid and in each case at least with local overlapping with one of the microlenses from the microlens grid in order to generate a first optically variable information element. The grid spacing in the microimage grid and in the microlens grid in each case in at least one spatial direction is less than 300 mcm. The second layer has in a first region at least one first area having microimages, and has at least one second area having optically active surface structures for forming a third optically variable information element, different from the first optically variable information element.

EFFECT: improved security.

32 cl, 14 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention describes a security element for a data medium, having an ink layer and an effect layer which, upon viewing from a first angle is substantially transparent and upon viewing from at least one second, so-called effect angle, shows a colour tone which, at least on the first portion of the effect layer, produces a complementary contrast with the colour tone of the ink layer.

EFFECT: invention provides high degree of security from counterfeit.

18 cl, 9 dwg

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