Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
  • B42D25/29—Securities; Bank notes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/916—Fraud or tamper detecting
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/917—Electroluminescent
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Definitions

• the invention relates to a security document comprising, as a copy security element, impressions of front and back lines observable in reflected light and forming an image observable in transmitted light.
• patterns on the front and patterns on the back of the bill have been made by adequate identification in a given area. that these patterns complement each other to form a final image or representation, for example a set of graphic lines or alphanumeric characters or an image of a character or an animal, etc.
• a final image or representation for example a set of graphic lines or alphanumeric characters or an image of a character or an animal, etc.
• identical patterns are made on the front and back by superimposing them so as to observe in transmitted light an image which is also identical to the patterns.
• These patterns are produced by printing solid areas of color or by printing lines or lines.
• Certain banknotes are of a sufficiently low grammage and opacity to allow the observation of these patterns insofar as the prints are solid and / or are not too fine.
• the means for reproducing the patterns allow copying in recto / verso color and have increasing powers of resolution, so we are looking for patterns that are more difficult to counterfeit.
• the Applicant has found that currently prints made of solid colors are the most used but also that they are relatively easy to reproduce by photocopiers or color scanners on both sides.
• These euro banknotes do not have a reduced opacity zone, the solid areas are quite coarse and could be fairly easy to reproduce.
• the applicant therefore aims to propose a security document having an increased level of security against double-sided copying.
• the applicant proposes to achieve this goal by providing a security document comprising, as a security element against recto / verso copying, impressions present on the recto and verso and observable in reflected light and forming an observable image in transmitted light, said prints with lines and form said image as it has a relief and volume, that is to say a three-dimensional effect, called 3D effect.
• the final image observable in transmitted light has a 3D effect obtained by the variations in density in number per unit area and / or in printing intensity of the lines. “Variations in density in number per unit area” means that the distances between the lines are varied.
• the lines are present in large numbers and are very fine.
• the lines are made of broken lines, in particular of discrete, that is to say distinct, points.
• a particular way of making the lines can be to print the lines such that two adjacent lines of the image are always one on one side and its next on the other side.
• Another way can be to print, by means of algorithms, series of lines on one side and their complementary on the other. They can be parallel or intersect.
• the front and back sets of lines can be determined by mathematical means, encryption, etc. ...
• the line prints on the front and back are identical and superimposed.
• the image to be observed in transvision can be an image as such but also part of a larger image or portrait and in particular already existing on the document.
• the lines are lines in black and / or in shades of gray and / or in color and / or changing in appearance depending on the angle of observation or under the action of an excitation source such as 'radiation, in particular fluorescent, thermochromic or photochromic and / or have electromagnetic properties including electroconductive, magnetic or magnetic resonance.
• an excitation source such as 'radiation, in particular fluorescent, thermochromic or photochromic and / or have electromagnetic properties including electroconductive, magnetic or magnetic resonance.
• the document may also include prints of solid colors.
• the security document may include other elements of security, in particular a security thread, boards, iridescent prints, etc.
• the invention relates to a bank note.
• the prints are made in a zone of reduced opacity.
• this zone of reduced opacity may be an area such as that described in patent application EP687324, that is to say an area of reduced thickness and opacity with an area of more than 0.4 cm 2 obtained in a bi-jet paper, a jet of which has an area of reduced or even zero thickness.
• the document is therefore a sheet of bi-jet paper, a jet of which has an area of reduced or even zero thickness and with an area of more than 0.4 cm 2 , this so-called area comprising the impressions.
• the document can have as support a sheet or a plastic film of an opacity allowing the observation of prints as in the case of a paper.
• a portrait of a man with the beard is produced, on paper, limited to the central part of the face, ie to the mouth, the nose and part of the beard.
• Such an image is made up of lines, the density of which is varied in number by varying their spacings; a set of lines is printed on the front and the complementary set on the back so as to constitute the portrait which is observable in transvision.
• the 3D effect, of relief and volume, is therefore obtained by the variations in density in number of lines.
• the location of the front / back portrait print allows to obtain an image observable in transvision, clear and of quality. If a counterfeiter tries to photocopy this image recto / verso, he will not be able to locate the two sides of the photocopy with precision and then the image will not appear more clearly, there will then be clusters of lines, the image will no longer be visible by transvision.
• the man in the street can thus easily and immediately see that the document or ticket has been forged.
• this image is produced in a zone of reduced opacity.
• a zone is produced for example such as that described in patent EP687324.
• a sheet of paper is printed from a grid on one side of the sheet and the same grid coincidentally on the back. Since the front / back printing is identified with extreme precision on the machines dedicated to printing banknotes and security documents, the front and back grids overlapping, the image of a single 3D effect grid appears when observe the leaf in transvision and also in reflected light. If a counterfeiter reproduces these grids by means of a copier or a printer (after scanning), there will be an offset of a bar or part of the bars and then the grid resulting from the superposition of the two grids front and back will become a cluster or even a black square although in observation in reflected light we would see a grid on the front or back. The man in the street can thus easily and immediately see that the document or ticket has been forged.

Landscapes

• Business, Economics & Management (AREA)
• Accounting & Taxation (AREA)
• Finance (AREA)
• Credit Cards Or The Like (AREA)
• Printing Methods (AREA)
• Inspection Of Paper Currency And Valuable Securities (AREA)
• Accessory Devices And Overall Control Thereof (AREA)
• Editing Of Facsimile Originals (AREA)
• Duplication Or Marking (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=29797597

Family Applications (1)

Country Status (7)

Families Citing this family (7)

Family Cites Families (16)

• 2002
  • 2002-07-19 FR FR0209221A patent/FR2842460B1/fr not_active Expired - Fee Related
• 2003
  • 2003-07-18 EP EP03755616.4A patent/EP1525101B1/de not_active Revoked
  • 2003-07-18 US US10/521,555 patent/US7883762B2/en not_active Expired - Fee Related
  • 2003-07-18 AU AU2003273456A patent/AU2003273456A1/en not_active Abandoned
  • 2003-07-18 CA CA2492816A patent/CA2492816C/fr not_active Expired - Fee Related
  • 2003-07-18 WO PCT/FR2003/002273 patent/WO2004009372A2/fr not_active Ceased
  • 2003-07-18 BR BR0305564-7A patent/BR0305564A/pt not_active Application Discontinuation

Non-Patent Citations (1)

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