EP0650853A1 - Process for obtaining double picture prints on hard surfaces - Google Patents

Process for obtaining double picture prints on hard surfaces Download PDF

Info

Publication number
EP0650853A1
EP0650853A1 EP93500148A EP93500148A EP0650853A1 EP 0650853 A1 EP0650853 A1 EP 0650853A1 EP 93500148 A EP93500148 A EP 93500148A EP 93500148 A EP93500148 A EP 93500148A EP 0650853 A1 EP0650853 A1 EP 0650853A1
Authority
EP
European Patent Office
Prior art keywords
faces
furrows
angle
reliefs
bas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93500148A
Other languages
German (de)
French (fr)
Other versions
EP0650853B1 (en
Inventor
José Luis Diaz Salas
Julián Zamorano de Blas
José Latorre Barrena
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fabrica Nacional de Moneda y Timbre
Original Assignee
Fabrica Nacional de Moneda y Timbre
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fabrica Nacional de Moneda y Timbre filed Critical Fabrica Nacional de Moneda y Timbre
Priority to AT93500148T priority Critical patent/ATE159208T1/en
Priority to DK93500148.7T priority patent/DK0650853T3/en
Priority to DE69314640T priority patent/DE69314640T2/en
Priority to EP93500148A priority patent/EP0650853B1/en
Publication of EP0650853A1 publication Critical patent/EP0650853A1/en
Application granted granted Critical
Publication of EP0650853B1 publication Critical patent/EP0650853B1/en
Priority to GR970403379T priority patent/GR3025730T3/en
Priority to HK98103135A priority patent/HK1004064A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/24—Pressing or stamping ornamental designs on surfaces
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C21/00—Coins; Emergency money; Beer or gambling coins or tokens, or the like
    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs

Definitions

  • the present invention relates to a process for obtaining double picture prints on any kind of hard surface, which process is particularly useful as a security system and a constituent element in designing coins, medals and the like, so that the said process allows two different pictures to be viewed on the same relief, being alternately visible depending upon the impingement of the light, i.e. one of the pictures will be visible in a given position and on tilting the piece slightly the said picture will be concealed and the other will come to light.
  • the double picture print system prevents the coins from being copied using matrix systems traditionally used in counterfeiting.
  • the visual checking of the genuineness of a coin depends upon the quality of the prints, that can in certain copies be very high.
  • a method that is often used in the fraudulent manufacture of coin moulds and which yields good results, is electroerosion, though this method is limited to prints with certain minimum dimensions, below which the method cannot be applied, bearing in mind that the size of the spark produced in turn limits such dimensions.
  • the process for obtaining double picture prints upon hard surfaces subject of the invention comprises initially making a relief formed by a mesh of straight and parallel furrows the side walls of which are at a particular angle to the general plane of the hard surface in question, viz. the said mesh has a triangular, preferably isosceles, section.
  • Each of the two pictures to be obtained is formed by all the walls pointing in the save direction, i.e. one of the walls in each and every furrow, that pointing in the same direction, is the base for representing a drawing, whereas the other wall shall in turn provide the base for representing the other drawing.
  • each of these two drawings is in turn defined by a variation in the degree of inclination of certain areas or each of the respective walls, which inclination is considerably greater to the general plane of the hard surface being treated.
  • the resolution of the picture shall depend directly upon the number of furrows used in the print, and their relief shall be dependent upon the type of minting, size of the print, distance between the furrows and inclination of its walls.
  • the height and spacing of the furrows will be as little as technically feasible, which will moreover expedite minting.
  • the process for obtaining double picture prints subject hereof comprises first of all providing the hard surface at issue, for instance the operating surface of a coin minting core, with a plurality of straight and parallel furrows (1) of dihedral shape and preferably having a triangular isosceles section, taking up fully the surface at issue, so that each of the furrows define two walls (2) and (3), with a different inclination, one of the walls (2) of such furrows having an identical inclination to the rest, as with the other wall, numbered (3).
  • the drawing on the faces (2) is obtained by establishing bas-reliefs (4) on such surfaces, where the inclination of such respective walls (2) and (3) is considerably greater with regard to the general plane of the hard surface at issue, as can be seen perfectly in the figure.
  • the resolution of the picture shall depend directly upon the number of furrows (1) to be used in the print.
  • the said number of furrows will be preferably six per millimetre and to provide the coin surface with such furrows a burin or cutting tool will be used with its faces at an angle of 50 to the vertical.
  • the furrows (1) shown in the only figure of the drawings explaining the invention will be formed thus, whereas the bas-reliefs 4-5 shall be provided using another burin or cutting tool having its leading edge chamfered with a cross- section of approximately 0.05 millimetres, i.e. 5 hundredths, the angle of the cutting faces of the said burin being at approximately 25 ° to the vertical.
  • the distance between the two peaks of two consecutive furrows will be approximately 0.15 millimetres.
  • the print to be made on the die stamp or minting core shall be executed using a computer assisted number control copier milling machine, in which the data concerning the start and end of each print line are inserted. These data, distinguishing hundredths, are obtained by analysing the two drawings previously outlined with the assistance of a CAD program. Printing shall be made using two cutting tools, one having a greater angle for the general mesh and the other a smaller angle and a given point measurement, requiring a great accuracy, for the two motifs.

Landscapes

  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Credit Cards Or The Like (AREA)
  • Basic Packing Technique (AREA)
  • Magnetic Record Carriers (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

Such is especially useful as a security system and constituent element in designing coins, medals and the like, and comprises providing the surface at issue with a relief formed by a mesh of straight parallel furrows (1), the side walls (2) and (3) of which are at a given angle to the general surface plane, the said furrows being identical in size and shape, and preferably having a triangular isosceles section, in order that one of its faces or walls (2) is parallel in all, as is the case of the other (3), one of the two drawings being printed on a group of faces (2) of such ridges and the other drawing on the second group of faces (3) of such ridges, and more specifically by providing bas-reliefs (4) and (5) on such faces (2) and (3), based upon a considerably greater inclination at given areas of such faces, specifically at the areas participating in the respective drawing.

Description

    OBJECT OF THE INVENTION
  • The present invention relates to a process for obtaining double picture prints on any kind of hard surface, which process is particularly useful as a security system and a constituent element in designing coins, medals and the like, so that the said process allows two different pictures to be viewed on the same relief, being alternately visible depending upon the impingement of the light, i.e. one of the pictures will be visible in a given position and on tilting the piece slightly the said picture will be concealed and the other will come to light.
  • In the preferred field of practical application of the invention the double picture print system prevents the coins from being copied using matrix systems traditionally used in counterfeiting.
    • BACKGROUND OF THE INVENTION
  • There are currently no security elements effectively preventing counterfeiting in the field of coin printing.
  • The visual checking of the genuineness of a coin depends upon the quality of the prints, that can in certain copies be very high.
  • A method that is often used in the fraudulent manufacture of coin moulds and which yields good results, is electroerosion, though this method is limited to prints with certain minimum dimensions, below which the method cannot be applied, bearing in mind that the size of the spark produced in turn limits such dimensions.
    • DESCRIPTION OF THE INVENTION
  • The process for obtaining double picture prints upon hard surfaces subject of the invention comprises initially making a relief formed by a mesh of straight and parallel furrows the side walls of which are at a particular angle to the general plane of the hard surface in question, viz. the said mesh has a triangular, preferably isosceles, section.
  • Each of the two pictures to be obtained is formed by all the walls pointing in the save direction, i.e. one of the walls in each and every furrow, that pointing in the same direction, is the base for representing a drawing, whereas the other wall shall in turn provide the base for representing the other drawing.
  • For its part, each of these two drawings is in turn defined by a variation in the degree of inclination of certain areas or each of the respective walls, which inclination is considerably greater to the general plane of the hard surface being treated.
  • In accordance with the above, the resolution of the picture shall depend directly upon the number of furrows used in the print, and their relief shall be dependent upon the type of minting, size of the print, distance between the furrows and inclination of its walls. As a security measure, the height and spacing of the furrows will be as little as technically feasible, which will moreover expedite minting.
    • DESCRIPTION OF THE DRAWINGS
  • In order to provide a fuller description and contribute to the complete understanding of the characteristics of this invention, a single sheet of drawings is attached to the specification which, while purely illustrative and not fully comprehensive, has a single figure which shows a hard surface having a double picture print obtained using the process subject of the present invention.
    • PREFERRED EMBODIMENT OF THE INVENTION
  • In the light of this figure it is clear that the process for obtaining double picture prints subject hereof comprises first of all providing the hard surface at issue, for instance the operating surface of a coin minting core, with a plurality of straight and parallel furrows (1) of dihedral shape and preferably having a triangular isosceles section, taking up fully the surface at issue, so that each of the furrows define two walls (2) and (3), with a different inclination, one of the walls (2) of such furrows having an identical inclination to the rest, as with the other wall, numbered (3).
  • After this previous treatment of the hard surface, viz. after providing the same fully with the furrows (1) described above, the process is completed establishing the said double picture, it being provided to this end that one of the pictures be in particular provided on the faces or walls (2) of the ridges (1) at a certain angle, and the other drawing on the faces or walls (3) that are at a different angle.
  • More specifically, the drawing on the faces (2) is obtained by establishing bas-reliefs (4) on such surfaces, where the inclination of such respective walls (2) and (3) is considerably greater with regard to the general plane of the hard surface at issue, as can be seen perfectly in the figure.
  • As aforesaid, the resolution of the picture shall depend directly upon the number of furrows (1) to be used in the print. The said number of furrows will be preferably six per millimetre and to provide the coin surface with such furrows a burin or cutting tool will be used with its faces at an angle of 50 to the vertical. The furrows (1) shown in the only figure of the drawings explaining the invention will be formed thus, whereas the bas-reliefs 4-5 shall be provided using another burin or cutting tool having its leading edge chamfered with a cross- section of approximately 0.05 millimetres, i.e. 5 hundredths, the angle of the cutting faces of the said burin being at approximately 25 ° to the vertical.
  • The distance between the two peaks of two consecutive furrows will be approximately 0.15 millimetres.
  • In practice and merely as an example, the print to be made on the die stamp or minting core shall be executed using a computer assisted number control copier milling machine, in which the data concerning the start and end of each print line are inserted. These data, distinguishing hundredths, are obtained by analysing the two drawings previously outlined with the assistance of a CAD program. Printing shall be made using two cutting tools, one having a greater angle for the general mesh and the other a smaller angle and a given point measurement, requiring a great accuracy, for the two motifs.

Claims (1)

1. A process for obtaining double picture prints on hard surface, being especially useful as a security system and constituent element in designing coins, medals and the like, characterised in comprising the provision of a relief formed by a mesh of straight parallel furrows (1), the side walls (2) and (3) of which are at a given angle to the general surface plane, it being provided that each of the two pictures to be printed be defined on the group of faces (2) or (3) of the said furrows (1), pointing in a given direction, and be obtained by means of a plurality of bas-reliefs that may take up to a greater or lesser extent one or more areas of all or part of the said faces pointing in the same direction, which bas-reliefs are obtained by a variation in the angle of such faces, in particular with a considerably greater angle to the general plane of the hard surface at issue, the number of furrows used in the print being variable, directly in proportion to the resolution of the picture that is to be obtained.
EP93500148A 1993-11-02 1993-11-02 Process for obtaining double picture prints on hard surfaces Expired - Lifetime EP0650853B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT93500148T ATE159208T1 (en) 1993-11-02 1993-11-02 METHOD FOR OBTAINING TWO PRINTED IMAGES ON HARD SURFACES
DK93500148.7T DK0650853T3 (en) 1993-11-02 1993-11-02 Method of producing two images on hard surfaces.
DE69314640T DE69314640T2 (en) 1993-11-02 1993-11-02 Process for obtaining two printed images on hard surfaces
EP93500148A EP0650853B1 (en) 1993-11-02 1993-11-02 Process for obtaining double picture prints on hard surfaces
GR970403379T GR3025730T3 (en) 1993-11-02 1997-12-22 Process for obtaining double picture prints on hard surfaces.
HK98103135A HK1004064A1 (en) 1993-11-02 1998-04-15 Process for obtaining double picture prints on hard surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93500148A EP0650853B1 (en) 1993-11-02 1993-11-02 Process for obtaining double picture prints on hard surfaces

Publications (2)

Publication Number Publication Date
EP0650853A1 true EP0650853A1 (en) 1995-05-03
EP0650853B1 EP0650853B1 (en) 1997-10-15

Family

ID=8214885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93500148A Expired - Lifetime EP0650853B1 (en) 1993-11-02 1993-11-02 Process for obtaining double picture prints on hard surfaces

Country Status (6)

Country Link
EP (1) EP0650853B1 (en)
AT (1) ATE159208T1 (en)
DE (1) DE69314640T2 (en)
DK (1) DK0650853T3 (en)
GR (1) GR3025730T3 (en)
HK (1) HK1004064A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998053719A2 (en) * 1997-05-29 1998-12-03 Matthiesen, Miriam Method for impressing microstructures into metals or other hard materials, corresponding impression tool and coin
NL1014733C2 (en) * 2000-03-23 2001-09-28 Konink Nl Munt N V Coin or medal stamp, method of making it, as well as coin or medal.
NL1021905C2 (en) * 2002-11-12 2004-05-26 Konink Nl Munt N V Coin image constructed from characteristics.
NL1025511C2 (en) * 2004-02-18 2005-08-19 Konink Nl Munt N V Method for applying an image to a coin / token, coin / token thus obtained and the mold used therefor.
DE202012007473U1 (en) 2011-08-05 2012-08-29 ALLTEC Angewandte Laserlicht Technologie Gesellschaft mit beschränkter Haftung relief structure
EP2594149A1 (en) * 2011-11-18 2013-05-22 Fabrica Nacional De Moneda Y Timbre - Real Casa De La Moneda Object comprising a region of its surface suitable for showing a plurality of images

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL291349A (en) * 1900-01-01
DE604690C (en) * 1933-02-16 1934-10-25 Everett John Schwantes Method for protecting inscription plates cast onto engine parts against forgery
DE3618864A1 (en) * 1986-06-04 1987-12-10 Ernst Ing Grad Roethke Alternative double motif wall covering

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL291349A (en) * 1900-01-01
DE604690C (en) * 1933-02-16 1934-10-25 Everett John Schwantes Method for protecting inscription plates cast onto engine parts against forgery
DE3618864A1 (en) * 1986-06-04 1987-12-10 Ernst Ing Grad Roethke Alternative double motif wall covering

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998053719A2 (en) * 1997-05-29 1998-12-03 Matthiesen, Miriam Method for impressing microstructures into metals or other hard materials, corresponding impression tool and coin
WO1998053719A3 (en) * 1997-05-29 1999-03-04 Matthiesen Miriam Method for impressing microstructures into metals or other hard materials, corresponding impression tool and coin
NL1014733C2 (en) * 2000-03-23 2001-09-28 Konink Nl Munt N V Coin or medal stamp, method of making it, as well as coin or medal.
NL1021905C2 (en) * 2002-11-12 2004-05-26 Konink Nl Munt N V Coin image constructed from characteristics.
WO2004043189A1 (en) * 2002-11-12 2004-05-27 Koninklijke Nederlandse Munt N.V. Coin image composed of characteristics
NL1025511C2 (en) * 2004-02-18 2005-08-19 Konink Nl Munt N V Method for applying an image to a coin / token, coin / token thus obtained and the mold used therefor.
WO2005077674A2 (en) * 2004-02-18 2005-08-25 Koninklijke Nederlandse Munt N.V. Method for applying a relief image to a coin/token, coin/token obtained in this way and die used for this
WO2005077674A3 (en) * 2004-02-18 2006-06-01 Konink Nl Munt N V Method for applying a relief image to a coin/token, coin/token obtained in this way and die used for this
DE202012007473U1 (en) 2011-08-05 2012-08-29 ALLTEC Angewandte Laserlicht Technologie Gesellschaft mit beschränkter Haftung relief structure
EP2554397A1 (en) 2011-08-05 2013-02-06 ALLTEC Angewandte Laserlicht Technologie Gesellschaft mit beschränkter Haftung Embossing structure
WO2013020687A1 (en) 2011-08-05 2013-02-14 Alltec Angewandte Laserlicht Technologie Gmbh Embossing structure
EP2594149A1 (en) * 2011-11-18 2013-05-22 Fabrica Nacional De Moneda Y Timbre - Real Casa De La Moneda Object comprising a region of its surface suitable for showing a plurality of images
WO2013072449A1 (en) * 2011-11-18 2013-05-23 Fábrica Nacional De Moneda Y Timbre - Real Casa De La Moneda Object comprising a region of its surface suitable for showing a plurality of images
AU2012338834B2 (en) * 2011-11-18 2016-03-03 Fabrica Nacional De Moneda Y Timbre - Real Casa De La Moneda Object comprising a region of its surface suitable for showing a plurality of images
EP2779857B1 (en) 2011-11-18 2016-04-20 Fábrica Nacional de Moneda Y Timbre - Real Casa de la Moneda Object comprising a region of its surface suitable for showing a plurality of images
RU2609220C2 (en) * 2011-11-18 2017-01-31 Фабрика Насьональ Де Монеда И Тимбре - Реаль Каса Де Ла Монеда Object containing area of its surface suitable for displaying of plurality of images
US9682591B2 (en) 2011-11-18 2017-06-20 Fábrica Nacional De Moneda Y Timbre Real Casa De La Moneda Object comprising a region of its surface suitable for showing a plurality of images

Also Published As

Publication number Publication date
DE69314640T2 (en) 1998-02-26
GR3025730T3 (en) 1998-03-31
DK0650853T3 (en) 1997-11-03
ATE159208T1 (en) 1997-11-15
EP0650853B1 (en) 1997-10-15
HK1004064A1 (en) 1998-11-13
DE69314640D1 (en) 1997-11-20

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