Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
  • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
  • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
  • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
  • D21H21/52—Additives of definite length or shape

Definitions

• the invention relates to flat and relatively small format security elements, of the wafer type, as well as the security documents comprising said elements and the method of manufacturing said elements.
• planchettes In security documents, there are small format security elements known as planchettes for authenticating documents.
• the boards are similar to confetti having various shapes for example circular, hexagonal. It is advantageous for these boards, and therefore the material in which they are cut, to exhibit surface optical effects such as iridescence or dichroism and / or luminescence and in particular fluorescence, reflection or polarization of light. These effects are obtained for example by printing or inclusion of specific compounds.
• these boards may include authentication agents. These boards are generally made by cutting a sheet or a plastic film or a sheet of paper or a complex, by a sequential process of stamping by punches or pins of a flat sheet. These boards have a size of the order of 1.5 mm.
• the sheets are plastic sheets and / or light weight paper.
• overlay sheet When they are based on a sheet of paper, it may be a so-called overlay sheet, usually used as a protective sheet in the field of decorative laminated papers; this sheet is traditionally manufactured by draining an aqueous suspension of slightly refined cellulose fibers, of the order of 20 ° SR (Schoepper-Riegler degrees), and containing a moist, non-opacified and low basis weight resistance agent, of the order of 25-40 g / m 2 , and a thickness between 50 and 100 microns. They may include an agent improving their wettability and / or heat-sealing varnish facilitating their holding in the paper. Other types of papers can be used. Each board is in general of a single color.
• the boards are introduced into the aqueous dispersion containing cellulose fibers or synthetic fibers and other additives commonly used in the papermaking technique.
• aqueous suspension is drained on a fabric of a round-form or flat-table paper machine called Fourdrinier, a number of boards are placed on the surface of the sheet of paper thus formed, and then the sheet is dried.
• Security documents comprising boards are described for example in patents EP342929 , EP546917 , EP544611 or US4037007 .
• the patent application CN 1157790 relates to a bottle cap having a hidden pattern for preventing counterfeiting.
• the European patent application EP 0 518 740 relates to a security document comprising a security thread visible in transmitted light, including iridescent marks that can appear in windows on the sides of the document.
• French patent FR 1 413 910 relates to a security thread or security tape which may include, in particular, a printed design, letters or network.
• the French patent application FR 2,593,840 relates to the use of a marking means comprising a fluorescent substance in a security paper.
• the Japanese patent application JP 2001-159096 relates to the use of small pieces of paper, possibly colored, dispersed within the substrate of a security document.
• the Applicant therefore proposes security elements whose level and security possibilities have been increased compared to existing ones and which can be introduced into the documents, especially during the manufacture of the substrate.
• the invention therefore relates to a flat safety element in the form of a board, having a front face and a reverse side, which is characterized in that it comprises, printed on each of its faces, at least one identified authentication pattern and / or an authentication pattern resulting from the combination and / or superposition of a pattern on its front face and a pattern on its reverse side, at least one of said authentication patterns being at least partly observable in transmitted light.
• Said element therefore comprises an authentication pattern observable in transmitted light (transvision) which may be the marked pattern and / or a pattern resulting from the combination and / or superposition of the front and back patterns.
• the patterns on the front and back can be marked patterns and / or also have an authentication pattern function.
• said identified authentication pattern is identified either with respect to at least part of the form of said security element or with respect to at least part of said patterns. It can be a combination of colors identified between them. For example, we can make a pattern representing the image of the flag of a country, stripes of different colors.
• At least one of the patterns is visible to the naked eye that is to say without apparatus magnifying, however this observation with the naked eye may require the aid of a pattern-revealing device such as a UV source if the pattern is fluorescent or phosphorescent or a source of infra-red rays if the pattern is sensitive to this type of radiation.
• a pattern-revealing device such as a UV source if the pattern is fluorescent or phosphorescent or a source of infra-red rays if the pattern is sensitive to this type of radiation.
• said security element has as motif on the front at least one given color and as backside pattern at least one other given color, said authentication pattern observable in transmitted light being the color resulting from the color of the back and color of the front.
• the colors on the front and back can also have an authentication role.
• the colors of the front and back are chosen from the primary colors.
• said security element is such that at least one of said patterns is a pattern in the form of a geometric pattern, in particular in alphanumeric form and / or frame and / or lines and / or points.
• said pattern observed in transmitted light may result from the combination and / or juxtaposition of the patterns present on the front and back of said element.
• the security element according to the invention is such that its dimensions are between 0.5 and 6 mm, preferably between 1 and 4 mm.
• These security elements can be of any possible geometric shapes, in particular they can be square, rectangular, triangular, circular, oval, star, moon or curved edges for example sinusoidal type.
• the security element comprises prints at a rate of 1 to 10 g / m 2 per side, preferably about 2 to 5 g / m 2 per side by dry weight.
• the security element comprises patterns selected from patterns visible in natural light, visible under UV light, luminescent, in particular fluorescent or phosphorescent, detectable by infra-red radiation near or medium, thermochromic, piezochromic, tracer-based DNA, optically variable, in particular iridescent or based on liquid crystals or diffraction gratings or electromagnetic moire or holograms, or combinations thereof.
• said security element according to the invention comprises, under or next to said patterns, impressions of electromagnetic character, especially magnetic and in particular continuous tracks or codes in the form of magnetic bits.
• the security element comprises chemical reagents for authentication or reagents revealing a specific event.
• the security element according to the invention has as support, a sheet of paper or nonwoven, a plastic film or a complex of these materials.
• said element is based on a carrier of low basis weight, in particular 25-40 g / m 2 , and / or a thickness of about 50 to 100 microns.
• said support is a paper based on low-quality cellulose fibers of the overlay type.
• the plastic film of said element is a polyester film.
• said element is based on a bulk opacified support or a support comprising on at least one of these faces, at least in part a layer or an impression, in flat or partial , opacifying or barrier.
• the opacification / barrier makes it possible to suppress, in the case where it is desired, the interpenetration or interference of the impressions made on the front and back sides in reflected light.
• the inks penetrate into the paper and migrate partially from one face to the other and therefore interfere, which is not necessarily desirable or in the case with opaque or even transparent supports, the effects may interfere, however a certain transparency can be maintained if it is desired to have an observable effect in transmitted light.
• the opacification can be realized only partially on the element, thus one can have an element with a part without observable effect in transvision and a part with an observable effect in transvision.
• the invention also relates to a security sheet comprising a fibrous substrate including several flat security elements, having a front face and a reverse side, and a relatively small format such as a clipboard, said element being as described above.
• the security document may comprise between 5 and 20 of said elements.
• said security elements are arranged in band and / or distributed randomly within said substrate.
• the invention also relates to a document or security article obtained from said security sheet.
• Security element means any security purpose such as the security elements traditionally used in security documents (valuable papers such as banknotes, checks, coupons, restaurant vouchers) but also for other security applications. secure papers related to hygiene and / or medical and / or traceability, to the safety of people such as to indicate a specific event as an expiry date.
• Security document means the usual documents such as banknotes, checks, tickets to sports or cultural events, securities, identity documents. It can also be a security article such as a packaging, a label or any other product including a sheet and which must be authenticated.
• the printed media is cut to the mark in security elements according to the desired form and such that at least the marked pattern is present in full on said element.
• the printed sheet or film may be covered, in particular by means of printing, with a varnish heat sealing to ensure the holding in the substrate of the security document that will include them.
• An overlay-type paper sheet is produced according to the traditional method by draining an aqueous suspension of slightly refined cellulose fibers, of the order of 20 ° SR (Schoepper-Riegler degrees), and containing a wet strength agent, not opacified and having a thickness of 70 microns.
• This sheet has a certain transparency.
• the front face is printed in a blue fluorescent color and the back side in a yellow fluorescent color.
• a wetting improving agent and a heat-sealing varnish are applied on the surface to facilitate their holding in the paper.
• the sheet obtained is cut into fibrettes, therefore of flat and rectangular shape, having a width of about 1 mm and a length of about 1.5 mm. When we observe these fibrettes in transvision and UV, they have a green color. These "tri-colored" fibrils are dispersed in the paper pulp intended to produce a security paper.
• the sheet is made on a paper machine according to the techniques known to those skilled in the art, with possibly other known security elements.
• the resulting security paper comprises several fibrettes as previously described visible under UV light, having under observation in reflected light (under UV) on one side a blue color and on the other side a yellow color, and in transmitted light observation. and always under UV a green color. If necessary, apply a slightly opacifying layer before the blue prints so that the blue and yellow prints interpenetrate into reflected light and produce the green combinatorial color that would be observed through.
• a paper of the opacified overlay type having an opacity such that the patterns that it will be visible are produced without interfering when viewed in reflected (flat) light, but will allow transmitted light observation of the patterns on the front and back. back.
• the face is printed by heliography in a fluorescent yellow color.
• patterns are printed in the form of a black dot. about 0.2 mm in diameter. The points are printed (distributed) according to the shape and size that will have the board after cutting.
• a wetting improving agent and a heat-sealing varnish are applied on the surface to facilitate their holding in the substrate which will contain them.
• the sheet is cut into circular boards of 1.5 mm diameter per mark at the points to obtain each board centered on a point.
• the circular boards are introduced into paper pulp to make a security paper which will contain them.
• fluorescent yellow boards and boards with the black dot centered on the board When we observe the paper under UV and in transvision we see a fluorescent yellow board with a black dot centered on the board.
• transvision and without UV we see the boards with the black point centered, a strong light may be necessary for this observation.
• Such boards are difficult to imitate by a counterfeiter because it is extremely difficult to print a marked image and further cut also at the marker.

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

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• 2004
  • 2004-02-11 FR FR0401330A patent/FR2866036B1/fr not_active Expired - Fee Related
• 2005
  • 2005-02-11 WO PCT/FR2005/000337 patent/WO2005078192A1/fr not_active Application Discontinuation
  • 2005-02-11 US US10/589,002 patent/US7905422B2/en not_active Expired - Fee Related
  • 2005-02-11 PL PL05717626T patent/PL1716289T3/pl unknown
  • 2005-02-11 BR BRPI0507606-4A patent/BRPI0507606A/pt not_active IP Right Cessation
  • 2005-02-11 CA CA2555587A patent/CA2555587C/fr not_active Expired - Fee Related
  • 2005-02-11 EP EP05717626.5A patent/EP1716289B1/fr not_active Not-in-force

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