CA2112476C - Credit of security document comprising an anti-forgery device, and a carrier strip with transferable pattern for producing such a document - Google Patents
Credit of security document comprising an anti-forgery device, and a carrier strip with transferable pattern for producing such a documentInfo
- Publication number
- CA2112476C CA2112476C CA002112476A CA2112476A CA2112476C CA 2112476 C CA2112476 C CA 2112476C CA 002112476 A CA002112476 A CA 002112476A CA 2112476 A CA2112476 A CA 2112476A CA 2112476 C CA2112476 C CA 2112476C
- Authority
- CA
- Canada
- Prior art keywords
- document
- reflecting
- carrier strip
- paper
- individual
- 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.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000002966 varnish Substances 0.000 claims description 10
- 229910001111 Fine metal Inorganic materials 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 abstract description 4
- 150000002500 ions Chemical class 0.000 description 14
- 239000003292 glue Substances 0.000 description 12
- 239000000976 ink Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229920000728 polyester Polymers 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 150000001768 cations Chemical class 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 241000282320 Panthera leo Species 0.000 description 3
- AYFVYJQAPQTCCC-GBXIJSLDSA-N L-threonine Chemical compound C[C@@H](O)[C@H](N)C(O)=O AYFVYJQAPQTCCC-GBXIJSLDSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- WWYNJERNGUHSAO-XUDSTZEESA-N (+)-Norgestrel Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](CC)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 WWYNJERNGUHSAO-XUDSTZEESA-N 0.000 description 1
- DLNKOYKMWOXYQA-CBAPKCEASA-N (-)-norephedrine Chemical compound C[C@H](N)[C@H](O)C1=CC=CC=C1 DLNKOYKMWOXYQA-CBAPKCEASA-N 0.000 description 1
- 241001666377 Apera Species 0.000 description 1
- 101100279860 Caenorhabditis elegans epg-2 gene Proteins 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241001282736 Oriens Species 0.000 description 1
- 241000206607 Porphyra umbilicalis Species 0.000 description 1
- 101001050475 Xenopus laevis Intelectin-1 Proteins 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/04—Preventing copies being made of an original
- G03G21/043—Preventing copies being made of an original by using an original which is not reproducible or only reproducible with a different appearence, e.g. originals with a photochromic layer or a colour background
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
-
- 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
- B42D25/355—Security threads
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Credit Cards Or The Like (AREA)
- Printing Methods (AREA)
- Curtains And Furnishings For Windows Or Doors (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
The invention concerns a credit or security document comprising an anti-forgery device. In accordance with the invention the anti-forgery device is in the form of a discontinuous reflecting surface (100) formed by a succession of individual reflecting elements (101) applied by transfer to a face (10) of the document (D) and organised in a general direction (DG); each individual reflecting element (101) has both a dimension of several millimetres and optimum compactness for a given reflection area, in such a way that the reflection phenomenon is clearly apparent to the naked eye and blinds the known optical analysis or reproduction systems. The invention also concerns a carrier strip with transferable reflecting pattern for producing such a document.
Use in particular for the production of banknotes provided with an anti-forgery device applied by transfer.
Use in particular for the production of banknotes provided with an anti-forgery device applied by transfer.
Description
W O 93tO1057 PCT/EP92/015~7 2~ 7 t3~
Credit or security document comDrising an an~i-forgery device, and a carrier stri~ with transferable pattern ~or Pro~llring such a document The invention concerns credit or security documents and more parti C~ll Arly ~c~m~nts comDrising an an~ orgery de~iGe. me ~ s in ouestion are all fi~uGi~rY or cr~dit ~c~nts or value do~nLs which, by virtue of their nature or the rights which they can ~ , have to be protected from forgeries, f~ if;cation or L~Lcl~ction.
That is the case for ~mnl~ with title ~ ~nLs, certi~icates, cheoues and traveller's cheques, stamps, credit car~s, bonds, vouchers, tickets or security do~ L~ such as identity cards, passports .~., that list not bemg l ~ tative.
It has already been proposed that a metallised wire which is totally or alternati~ely inteqrated into the paper of a d~nt may be used, which wire may be ~n~ode~ by ~ tue of discontin~ c~ating of a wire of non-ferromagnetic material with a ferromagnetic material (see for ~x~mnle British patents Nos 1 Og5 286 and 1 127 043).
That ~L~oedul~ has long been in use bu~ it is always invariably A~SOri ~ted with authentica~ion of ~he ~oK~nt by means o~ a de~ec~or which is espPc;Ally adapted to the wire in question, and does not permit photocopym g of the ~ to be effectively resisted: the image or the wire remains e~Lr~l~ly thin and not only draws little att~ntlon by virtue~of ~min~ion wi~h the naked eye but it ai~s an e~ ly small reflect mg surface which c~lt~.s little disturbance in ~e~u~ction of the ~s~t~nt.
Various ~l~ce~u~s have also been ~ osed, using ~pec;~l inks, in par~i~tlAr inks which are referred to as change-effect inks, ~hich make it possible for example to go from a blue colour to a green colour m p~nAPnce on the ;n~l ;n~tion of the ~ ",~"~, or inks which-cause a colour to A~pP~r ~nly when subjected to a certain ixradiation step (for example W-radiation)~ Reference may be made for example to US patent W O 93~01057 P ~ /EP92/01527 ~ 2 No 4 175 776 and European patents Nos 0 3~7 788 and 0 340 163. Those procedures are generally burdensome so that the use thereof is limited to areas of very small dimensions with respec~ to the ~im~n~i~ns of the ~ t.
It has also been proposed that those methods s~n--be canbined by applying by a transfer operation a continuous repetitive Fxlttern in strip form to a part of the document, and ~,L~intlng that part of the nt using a security ink (see for ~mrle European patent No 0 093 009). As an alternative, in order better to resist colour photocopy m g, it has been ~L~OSed that small areas can be overpr mted with an ink conlaining a possibly coloured reflecting substance~ for example of alumlnium powder . (see for ex~Dle US patents Nos 4 066 280 and 4 352 706).
Mention may also be made of the proceaures which pravide for coat m g the ~nt wlth a very thin metal film and then pri~t m g on a~ ho~s m g the ~oc~n?nt (see for ~ample US patent ~o 4 420 515), as well as the ~ a~ul~S ~ ch involve the ~rP~;c~tion of holograms to a Ao~nPnt ~see for e~xample French patent No 2 535 864, British E~tent No 1 ~17 840 and US patent No 4 171 864), or yet again mtaglio printing (see ~or Px~le French patent No 2 192 496).
Hc~ever, there is no doubt that those ~o~ res make it p~ssible to attract the attention of an alerted or exper;~e~ viewer but they are still relati~ely, bLL~ P ~nd they do not always prov.ide good resistance to ~ c~u~ing of the ~o~nts In question.
An o~ject of the ~l~senL in~ntion is to prcvide a credit or security ~:lo~ .L whose anti~forgery devqce has a higher level of fOr"~n~e than the above ~n~ioned syst~ms, both in regard to e ~ tion with the naked eye and in regard to madern l~yLu~Lion and rl i CA~ g ~LUC~'~1UL~S .
~n~th.er object of the invention is to pr~vide a ~lc~ L which gives a high de~ree o~ pro~ection from L~ ction ~hereof without involving embossing and/or holo~ram methods.
W O 93/01057 PC~/EP92/01527 21i~47~i A further object of the invention is to provide a document in ~hich the anti-forgery device is capable of being set in place both continuously on a strip o~ paper which passes along contimln~l~ly and on documents in ~he form of sheets wnich have already been cut up~
although operation on a reel is generally pxe~erred when possible.
Finally still another object or the invention is to provide a document in which the an~i-forgery device adheres perfectly to said ~c~ ~ ~t and is capable of withstanding wear and/or a ch~m'~l attack by the solvents which are usually employed in the field of printing~
m e invention more particularly c~ncellls a credit or security document comprising an anti-~orgery device characterised in that the anti-forgery device is in the form of a dlscontinuous reflecting surface formed by a succession or indi~idual reflecting elements ~rP~ by transfer to a face of ~he ~cc~ ~ nt and organised in a gen~ral direction of orientation which is predetermined wlth respect to the edges of said ~t~Pnt, each individual reflecting element ha~ing both a dimension which is appreciated transversely to said general direction of several mi 11 ;m~tres and opt ~ ccmpactness for a given xeflection area, in such a way that the re~1ection ~n~m~non is clearly apparent to the naked eye and blinds the known optical analysis or ~L~d~ction sy~tems.
In accordance with a pQrticular feature, A~pl; cAtion of the indi~idual reflect m g elements ~y direct transfer on to a face of the ~ L is con~lnlln1l-q, so that the int~nm~ te spaces between adjacent individual el~ments comprise a n~n-reflecting ~ut nonethel~
vi~;hle co~ering originating from an initial carrier strip which ha~
the ~ ntlnt~olls pattern to be transferred.
In an alternative configuration, ~ ;c~tion of the individual reflecting elements by direct transfer on to a face of the ~o~n~ is con~;ml~ the int~rmF~;~te spaces between adjacent individual ~ eing produced by pr ~ting with a white ~ of a ~;~Cont;nl~
pattern on a continl~oll~ reflecting band, after transfer of said W O 93/01057 P ~ /EP92/01~27 continuous reflecting ~and from an initial carrier 5trip. In accord3nce with another alternative configuration, the int~rmP~iAte s~aces are prc~ e~ by partial dissolution of a continuoll~ reflecting band after transfer thereof from an initial carrier strip.
In accordance with another ~articular feature, ,di~ect transfer results from the mitial carrier strip and a strip of paper being pas5ed between a pressure cylinder and a heating back~ g cylinder; as an alternative, direct transfer results from the initial OE ier strip and a strip of paper ~eing passed bet~een a pressure cylinder with a continuous pressure track and a heating backing cylinder. It is also possible for direct transfer to result from the initial OE ier strip being struck with a die for continuous application on a sheet of pa~er.
In an al~erna~i~e configuration of cont;nllo~ ppl;C~tion of the individual reflecting ~1 ~m~nts, application by direct transfer on to a face of the ~o~ ~ nt may be ~icc~ntinuous~ so tha~ the interme~;Ate spaces between adjacent individual elements are free from any covering.
It is then p~s;hle for the discontinuous character of the pattern to result from an initial carrier strip with a cont;n~lo~l~ reflecting band, and a strip of paper, be m g passed between a pressure cylinder with a ~;ccon~; ~tl~ pressure track and a heating bac~ing cyl m der; as an alternati~e, ~he ~-.cc~n~in-lol1~ ~ acter of the ~a~Ler~l results from the initial ~arrier strip be m g struck wlth a die for ~- ~cnnt; nllotl~
A~pl;~tion, on to a sheet of paper. In that part;~ll~r case, the non-reflec~ing but visible elements referred to above do not appear.
Advan~A~POll~l y also ~ each individual ~1Pm~t is cov~red with a prctective varnish or 1~ r which has a high level of resistance to abrasion and solvents.
Prefer~bly also, each individual ~lpm~nt fo~ms a ~ or rA~h1e of reflect m g all visible wavelengths. Advantageously m that case, the individual reflecting ~l~mP~ts are formed by a fine metal lay~r and preferably a fine layer of alumi m u~; in particular the mirror formed by some at least of the individual reflecting ~l~mPnts is comvlete or 'W O 93/01057 PCT/EP~2/01527 2112~6 flat without being disturbed by geometrical ~m~nts at least partially cover~ng said murror.
Advantageously also, the indi~idual reflecting eleme~ts of the reflecting surface ha~e a contour of quadrila~ural shape.
For example, the contour is in the shape of a re~tangle of which ~n edge is pal-allel to the general direction of orientation of the indi~idual reflecting elements. In an alternative configuration, the contour is in the form of ap~allelogram of which an edge is parallel to the general direction of orientation of the individual reflecting elements and preferably then the okher edge of the parallelogram is inclined at a gi~en angle wqth respect to said general direction of orientation, said angle preferably being close to 45~.
Advantageously in that case the width of the contour, as considered in a direction which is orthcgonal to said general direc~ion of orien~ation, is at least equal to thre~ ~;ll;m~tres and the length of the contour, as ~on~ red in a directicn which is r~r~ 1 to said general direction of orientation, is preferably ~etween four and ten m; 1 1; ~ s .
Preferably also the general direction of orientation of the individual reflecting elemen~s is paral3el to the shcrt side of said It is fin~l ly possible for the ~ ~r~ on its two faces to comprise an anti~forgery device which is in the form of a discontinuous reflecting suxface, said tw~ devices preferably being formed by ;~e~t;c~l individual reflecting ~l~m~nts.
The invention also c-unc~ s a carrier strip campris m g a tranferable reflecting pattern for providing a f; ~ ry or credit L or security do~l~rlL compris m g one at least of the abo~e-~P~;one~ feaL~s, said carrier strip being ~hAr~ctPr;.~e~ in ~hat it is of a m~lti-layex structure with in s~ceq.s;~n an uFper layer of plastic material serving as a carrier, a laver of wax or glue which W O ~3~01057 P ~ /EP92/01527 . 6 melts in the hot condi~ion, a very fine metal layer constituting the reflecting pat~ern to be transferred, and finally a layer of hot-melting glue for affording adhesion of said m~tal layer to a face of a ~ ~ nt of paper.
S Preferably a layer of varnish o~ iacquer is also~provided between the layer of hot-melting glue or wax and the fine m~tal layer, said layer of varnish providing protection for the transferred reflecting pattern, in par~ r in relation to abrasion and solvents.
Advantageously also, ano~her layer of varnish is further provided between the fine metal layer and the adhesion glue layer, said var m sh layer providing protection for the reflecting pattern to preven~
penetration of the metal particles mto the paper of the document upon transfer of the reflecting pattern.
Other features and advantages of the invention will be more clearly apparent from the following description and the ~crmr~ying d~awings concerning a part~ r ~mho~ nt, with reference to the Fi~res ~n ~ich:
Figure 1 is a plan view of a ~ m~nt canprising an anti forgery device acco:rding to the invention, Figure 2 is a view on a larger scale of tw~ individ~ reflecting elements forming part of the abovc ~ Lioned anti-forgery device, Figure 3 ill~LL~Les an alterT~tive fo~n of Figure 2 ~n which the contour vf t~he indi~idual re~1ecting e1~ is rectangular, Figures 4a and 4b are ~wo sections taken along line rV-IV ~n Figuxe 1, illU~Ls~Lm g tw~ alL~Li~e configurations respectively with and withaut a ~L~oLe~Live v~tn;~h, Figures Sa and 5b are tw~ sections illustrat m g the m~lti-layer s~ ~Lule o~ tw~ alternati~e configur ~ ions of an m itial carrier strip according to the invention, ~he carrier strip being us2d to provide fo~
transfer of the a~ti-forgery device, respectively with a~d with~ut p~otective v~rn~.~h ~those Figures are thus to be ccmpared to Figures 4a and 4b above, shcwing the ~n~ ~ nt after transfer of said anti-forgery device~, W O 93/01057 P~T~EP92/01527 21~2~7~
F:igure 6 diagrammatically ill~ d-es con~imlml~ tra~;fer of the anti-forgery device by being passed between tw~ cylLnders comprising a pressure cylinder and a heatinq backing cylinder, FLgure 7 is a profile view illustrating said cylin~ers between S which the strip of paper and the initial carrier~x1p carrying the anti-forgery device to be transferred con~;n~l~u~y pass, Figures 8 and 9 illustrate two alternative forms of Figure 7, ~Lth a pressure cylinder co~pris:ing a pressure track which is discontinuous and cos~tinlloll~ respectively, and Fi.gure 10 is an overall view shawing a machine which ~an be used to ad~rantage for continuouslyeffecting transfer of the a~ti-forgery de~ice on to a strip of paper which moves con~inuously t~rough the rrA~hi n~.
Figure 1 shcws a docl~ent D which is here in the foxm of a rectan~ ar sheet 1, ccmprising an anti-forgery device lOO according to the i~7ention.
In accordance wi~h an essential feature of the invention, the ~nti-forgery device is in the fo~n of a ~; cc~n~; m~ reflectmg sur~ac~ 100 fo ~ by a s~lccP~s;~n of individu~L xeflecting elements 101 organised in a generaL direction DG of orie~ta~ion which is predet~rmin~ wqth respect t3 the edges 11 and 12 of the ~ m~nt.
As will be described in greater detail hereina~ter, the individual reflec~:ing ~lPm~n~s,101 are ~l;e~ by transfer (preferably in the hot co~diti.on) on to a face :L0 of the ~n~ r ~ D. In addition e~ch 2~ indi~iclual re~lecting ~l~m~nt 101 has both a ~;m~n~ , as d~?~ iated tra~v~L~ely to the general direction DG, of several mill;m~tres, and opt;lm~ ccmpactness for a given reflection area which is e~Luated by a co~ff;c7ent cvrresp~nC~;ng to the reflection areafperimeter ratio, in such a ~ay ~hat the reflection ph~ n is cle ~ly apparent to ~he naked eye and blinds the kncwn opti~al analysis or ~ ction system~ in particullr ~y virtue of a high reflection c~city an~
W O 93/0l057 ~ ~ PCTJEP92/01527 relatively large reflection surfaces. ~ny value which is at least equAl to O.S mm is considered satisfactory, for the above-mentioned ratio~
The document D here comprises a pr m ted graphlc device G and a discontinuous reflecting surface 100 whose general.d~rection DG is p2rallel to the short side 11 of the ~ L~ It will be appreciated that such ~1 arrangement is only one possible ~m~le but the orientation DG which is selected to be parallel to one of the edges of the document, in this case the short edge, is advantageous when the intention is for the ~ npnt to be passed into an autcmatic process.ung ma~h; ne, in which case the document then mDves parallel to one of its edges.
Each individual element 101 can thus foLm a mirror which is capable of reflecting all visible wavelengths. Prererably in that c~se, individual reflect m g ~1 ~mPnts 101 will be fo ~ by a fine metal lay~r and in particular a f me layer of all~l ni lm~ . By way of 1 n~i c~tion, that layer may he of the order of 0005 ~m in thickness.
m e choice of all~i n; l~n is advantageous for its very high coefficient of reflec~ion, but it is apparent th~lt it w3uld be possible to choose cther metals such as for example chromium. The mlrror formed by scme at least of the individ~ reflecting ~l ~m~nt~ 101 is preferably complete or flat, without being disturb~d by geometrical elem~nts which at least partially co~er said mirror.
~he ~; cronti nllolls surface 100 which is for~ed by a plurality of individu~l reflect m g ~l~m~n~ 101 thus ~ ts substantial ~7.1 inq of the analysis or ~ u~Lion s~L~-~, by virtue of the large ~;m~n~ion of each or the individual reflecting ~l~m~t~ 101 In a direction ~hich is transverse to the g~n~r~l direction ~G. For tha~
reason it ~h~ be noted that the known procedure which involv~s alterna~ively ~mhP~in~ a metal band or strip in the paper did not m~ke it possible to pro~uce a band whose width exceeds a ~ill;m~re~
~ W O 93/010~7 P ~ /EP92/01527 2 ~ 7 ~
~. 9 In this c~se, by virtue of a transfer procedure, it is possible to use .,. a ~i~continuo1s surface wnose width ~cP~ 3 mm and can ev~n go up to 10 ~
In addition, still in order to prcvide for ~ A~ g of the analysis or reproduction syste~ each individual ref~ecting element 101 must exhibit cpkimum comcac*ness for a given reflection area. That means that the surface area of each individual reflecting element lOl is as large as possible for a given perImeter or that the diameter of the largest circle which can be inscribed in the contour of an individual reflecting element, for a given reflection area, is at a ., .
Figure 2 is a view on a larger scale of two individual reflecting elements lOl which are paxt of the above mentioned anti-forgery device 100, each individual reflecting element lOl in this case be~ng of a con~our C in the form of a quadrilateral and more precisely here in the form of a par~llPlc~ram. Each m dividual reflecting element lOl is thus distributed m a discontim1o~l~ mAnn~r between two lines 105, 106 ; which are parallel ~o ~he general d:Lrection DG of the ~i ~Conti n~lQll~
suxface lO0. In an alL~rl~Live confi~lration, as shown in Figure 3, it is possible ~o use a contour C in the fo~m of a rectangle of which an edge ~in this case the edge 103) is p~rAl lel to the general direction DG. The Pmh~im~nt of Fi ~ e 2 is preferable hcwever insofar as it makes it possible to have a short le~;n~ edge at an end point of each individual reflecting element, and c~cP~uently it makes it possible better to resist the risk of the me~al particles which are transferred on to the ~f~",~ b~ccm;~g detached. In the configuration shcwn m Figure 2, ~he edge 103 of each individual reflecting element lOl is p~rallel to ~he direction DG, with a ~;m~n~ L which is preferably of the order of fro~ 2 to lO mm, while the short edge 104 is ;ncl;ne~
at a given angle with le~LecL to the general direction DG, ~hat angle pre~rably being close to 45~. The ~im~n~ions of the mdividual .
., ,"~,,, " ,~, " , ~ , . ,,, ., . .~ ~ ' W O 93/01057 ~ ~ P ~ /EP92~01S27 ; rectangular reflecting elements illustrated in ~igure 3 are preferably iden~ical to those indicated ab~e, with a width 1 of the order of from 2 to 10 mm tthat wldth corresponding ~o the distance between the contour lines 105, 106) and a length L of the order of from 2 to 10 mm. m ose dimensions will be selected in such a wa~ as to give a m;nim~ surface area of 10 mm2 for each individual reflecting element.
Such individual r~flecting elements make it possible to achieve an extremely satisfactory coefficient of mirror reflection as the ef~ective width of each of those elements is relatively substantial, , 10 said effective width ~l~oLe~r being considerably greater than thatwhich could be obtained with a strip or band which is alternatively ~mhe~ in the paper of the document.
Figure 1 shows the existence of a discontimlou~ surface 100 constituting the anti-forgery device on a face 10 of the document D, 15 but it is apparent that it is possible to provide such an anti-forgery device on the two faces of the document, each anti-forgery de~ice be m g in the fo~m of a ~ n~lnuolls reflecting surface and the tw~
" devices then preferably being formed by identical individual r reflec~ing ~l~m~nts 101. That makes it p~.s.sihle to y~ c~ a 20 reflec~ion p~p~m~non which is clearly apparent to the naked eye and which bl in~ the known optical analysis or l~ylcdu~Lion systems, irrespective of the way in which the ~oc~npnt is faced~
As stated hereinbefore, the su~cP~ n OI individual reflecting ts 101 is ~rpli~ ~y transfer, preferably in the hQt condition, 25 on to a face of the do~ r~ pl; ~tion b~ direct transfer on to a face of the ~u~ L can be cont;nlloll~ so that the int~rm~;ate spaces 102 between adjacent indi~idual reflecting elements 101 comprise a non-~eflecting but nonet~Pless ~isible co~ering originating from an m itial carrier strip having a discontinuous ~aLLell. to be 30 transferred. Fi~ure 6 diayL~l~Lically illu~LL~Les cont;ntloll~ tr~nsfer of that kind of the anti-forgery device (whose p~ttern is here , , W O 93/01057 ~ P ~ /EP92/01527 discontinuous) by ~eing passed between two cylinders comprising a pressure cylinder and a heating backing cYlindero Figure 6 shows a reel 310 frcm which there is unwound a strip of paper P which passes ar~und sl~cc~ssive rollers 311, 312 and 313 before p2ssing between a pressure cylinder 300 and a heatinq_backing cylinder 301. An initial carrier strip F bearing the pattern to be ~ransferred is unwound from a reel 314 in order also to pass between the cylinders 300 and 301, with the tw~ strips P and F thus being pressed against each other, w1th the application of a given tempe~dLUL~, for hot ~ransfer of the discontimloll~ pattern in such a way as to produce the desired ~i ~cnn~ 0~ C reflecting surface 100 with its succession of individu21 reflec~ing el nts 101. Downstream of the transfer, the carrier strip F or more precisely the residual part thereof wnich serve~ to carry the discontinuous pattern to be transferred is wound on to a reel 315. In this case, two smooth cylinders 300 and 301 are used, as can be seen from Figure 7. That provides for a transfer wqth clean edges, without ~ ; ng of the paper. After the transfer operation howe~er the paper is heavily satined or ~ (its gl~l n~
has been substa~tially mLlt;r~ by 5), the thickness of tha paper has decreased (substantially by 10%) and the paper has 1~ LJ~ very slightly in the dlrection of ~ v~l~nt (i~n elongati~n of the order of 2 /oo is n~rnt~l~y Pn~lntPred). When the ~oct ~ nt D also has a wrk, which is ~he case in par~;ct1l~r with bank notes, the wa~rm~rk has then lost its sharpness i~fter transfer of the discon~-in~lol~ reflecting pattern.
It is possible to ~ v~ the transfer of that ~;c:cnntinuous pattern by providing a slightly different pressure cyl;n~Pr, as shown in Figure 9: in fact, in this case the press~re cylinder 302 cnmprl .~es a con~;nt~nll~ pressure track 303 which presses the init~ll c~rrier s~rip F against the strip of paper P, beiring ;tg~n.~t ~le heat m g backing cylinder 301~ That then retains the ad~antage of a transfer 1~ .1: ... .
W O 93/01057 P ~ /EPg2/01527 with clean edges and wi~hout .?mho~ing of the paper, but, by virtue of the locally ;t~.pl i~r presstlre, that a~rang.~ment also pr~vides for a lack of satining or g1~ g of the paper and preservation of the sharpness of the watermark when the latter is prcvided.
It is also possible h.~wever to use an initia~-~carrier strip F
ccmprising a continuous reflectiny band to be transferr~d on to the do.~ument.
In that case it is possible ~o choose ei~her c.ont;nllotl~ tran_-.fer of the cont;r.~1ou~ reflecting band on to the paper a~d then arrange for a particular operation on the transferred continuous reflecting band to produce the in~rmP~-ate spaces between adjacent individual elements, or, in an alternative mode of operation, it is possible to provide for discontinuous trans~er of portions of the continuous reflecting band in order then directly to produce the intprmp~;~te spaces between adjacent individual ele~tents.
When the ~ ul~ adopted :is con~;n~ a~l;c~tion of a cont;nuou~ reflecting band, it is then possible to produce the int~rmP~i~te spaces 102 between adjacent ~.tdividual elements lOl by printing with a white ink of a ~i~cont;n~lol~ pattern on the transferred continl1o~1~ reflecting band or, in an alternative ~LU~dUL~ it is possible to ~lu~u~e those int~nmP~;~te spaces by partial dissolution of the transferred continuous reflecting band.
In ~he case of ~;~cnntimlouc ~p7;~tion, as shcwn in Figure 8 it will be possible to provide that the ~i~cont;ntlolls h~ractex of the k~ results from the initial carrier strip F with a co~im o1-~reflecting band and the strip of paper P be m g passed between a pressure cylinder 304 wlth a discon~in~lm1~ pressure track 305 and a heating bac~ing cylinder 301. me ~; ~cn~tl ~uol~ character of the pattern then results from a knurl m g action by the ~i~c~n~i ~uoll~
pressure track 305 on the Con~i~u~l~ reflecting band. Hcwever it is difficult to avoid flakes of reflecting material.being r~nmly torn W O 93/0l057 P ~ /EP~2/01527 away at the boundaries of the contours of the indi~idual reflecting elements, which flakes may interfere with subsequent offse~ prlnting on the ~o~nn3nt. It is easy to understand that transfer of a discontinuous band by means of a cQnti~ pressure cylinder (Figure 7) or by means of a cyl mder with a con~in~ s pre,~sure track (Figure 9) makes it possible to avoid the formation of such flakes of reflecting material.
In an alternative configuration of direct transf~r of the rotary type which has just been described above, it will be appreciated that it is possi~le to provide for direct transfer resulting frcm the initial carrier s~rip being struck with a die for applying same to a sheet of paper, wit~in ~he framew~rk of a procedure for transfer on to a sheet. That mcde of operation whIch is not shcwn here i5 well kncwn to those skilled in the pr mting art and it may concern transfer of a lS con~ l~tS reflecting band on to the paper (ln that case the ~rPl; r~tion die is can~; m~ if the ~Loce~re involves a ~ubsequent printing operation us mg a white ink on the transferred contin~ q reflecting band or partial ~;~solution of the transferred cont;ntl~
- reflecting band or it is ~;Ccontinllolls if such operations are to be a~oided), as well as transfer of a discont;ntl~l~ reflec~ing band (in that case ~he ~r~licatiGn die preferably being con~inllo m e m~lti~layer ~Ll~LuL~ of an initial carrier strip according to the invention will now be described, that carrier strip bei~g used to prcvide fox trans~er of the abu~ ;fied anti-forgery device, this being ~rp1;r~hle both in relati~n to a contim~ and a discon~iml~-~kaLLelll to be transferred.
The view in section shown in Figure 5a thus illustrates an initial ~arrier strip F which s~trcp~slvely comprises an upper layer 200 serving as a carrier, a layer 202 of hot-melting glue or wax, a very fine metal layer 201 for ~xAm~le of aluminium c~nstituting the reflecting ~and to be tr~ ~L~rl~d, and f;n~l ly a layer 203 of hot-melting glue. The layer 200 will preferably be of plastic material, W O 93/01057 P ~ /EP92/02527 ~ 14 being f or ~ample a layer of polyester which is fr ~ lO to 15 ym in thickness, while the metal layer 201 will be of the order of a few hundredths of a mucron, for examDle 0~05 ~m. The wax or glue corresponding to the thickness 202 serves to provide for separation between the polyester la~er 200 and the m~tal layer, 2~1 m the hot transfer operation, and it will be of the order of from 2 to 5 ~m m thickness. me glue constituting the layer 203 serves in turn to provide for ~h~ n between the metal layer 201 and the paper, and its ~hic~ness will al50 be of the order of 5 ~m. It will be advantageous to prcvi~e that the ma~erial forming the layer 202 mel~s at a temperature Tl which is lcwer than the t~,4eldL~re T2 at which the adhesion layer 203 melts, in order to produce separation of the metal layer 201 ~rom the polyester layer 200 just prior to transfer of the metal layer. By way of in~ic~tion~ the transfer operation will be effected using temperatures ranging from 110 to 150~C. After transfer, the document appears in section as illustrated in Figure 4a: it is thus po~s;hle to see a sll~cP~sion of individual reflecting ~lpm~nts 101 which are se~arated by in~ .&~ te spaces 102, aNd also traces 203' r~in;ng from the glue 203, which have pell~Ll~Led into the paFer 1 j~st ~elow the upward face of the ~c~ t~ The l,lL~?~rli~te spaces 102 between adjacerlt individual elements lOl may cnm~r; ~e a non-reflecting but nonetheless vi ~;hle covering orig~nating fran the initial carrier strip F having the discon~i n~ pattern to be transferred. The non reflecting cover m g will crmrri-~e in this case the hot-~rpl;cAtion g7ue 203' but also pn~;hly a protective varnish or lacquer, as will be described in the alternative confisuration hexe m after.
Figure Sb illustrates a carrier strip F haviny a multi-~ayer ~Ll~L~ which is more cnmrlPx than that described abcve, insofar as it has two protective uarnish layers.
This sLl~L~re again comprises the upper polyester layer 200 serving as a carrier and the layers 202 and 203 of hot-meltLng glue W O 93/01057 P ~ /EP~2/01527 21124~
with, fo.r the lat~er, a choice of material such that adhesion to the p~per is stronger than adhesion to the polyester carrier~ Ho~ever the met~ ~ zone corresp~n~i ng to the layer 201 is here si~ndwiched between ~wo layers of varnish 204 and 205, the thickness of which is of the o:rder of from 1 to 5 ~. me upper layer of~v~rnish ;204 makes it possilale to provide for protection of the transferred ~dividual reflecti~lg elements 101, having a high level of resistance to abrasion and solvents. The lo~er layer of varnish 205 also protects the metallised zane correspon~ing to the layer 201, by preventing the lQ metal particles from penetrating into the paper in the transfer operation~ Af~er transfer, the ~o~ ~Pnt is as illustrated in section in Figure 4b: as before, there are ayain the individual reflecting elements 101 which are sep~rated by intPrmP~i~te s~aces 102, and traces oi. glue 203' originat:ing from the layer 203. However, and unlike the sectional view shawn in Figure 4a~ Figure 4b ncw shows a protective film produced from the layexs of varnish 204 and 205, the upper lay~er corresponding to the lay~r for protecti~g the whole of the ~;cc~n~;n~ reflecting ~uLL~. In ~his case the int~rmFfl;~te spaces 102 ~o~prise a non-reflecting ccver~lg which is perfectly vn~;hle ~o the naked eye an~ which c~mprises pr~tective varnish and trace!s of the hot-~rp~ tion glue. It ~ho~ however be noted that the thi.c~nesses of v~rni~h have decreased in t-he transfer operation, by ~irtu.e of the pressure ~nd temperature invol~d.
In t~e case of ~ on~;m~ c~tion of the i~ividual reflectin~ elements by direct LL~sLer on to a face of the ~
the int~rm~ te spaces 102 between adjacent individual el~l,enLs 101 are pract:ically free o~ any co~ering.
Still. in order to provide for nR~-~ da~zle for optical analysis or L~L~iL~ction systems, it will be an attractive yL~os-ition to provide as large a number as pos~ihle of m dividual reflect m g ~l~m~nts 101 for a given ~;m~n~ion of the ~o~ J-L. Preferably then W 0 93/01057 P ~ /EP92/OlS27 & 16 the spacing 102 between adjacent individual elements will be of the order of a fraction of the lenqth of ~he contour of those el~ents, as considere~ in a direc~ion parallel to the general direction of orientation DG Thus, with a rectansular document such as a banknote i which is of the order of 80 mm in wid~h, it will_~e possible to arrange a~ least five individ~l reflecting elements to constitute the dicontin~lous reflecting surface formung the anti-forgery device.
Re~erence will now be made to Figure 10 to described a mach me which can be advantageously used ~or continuously effecting transfer of the anti-forgery device according to the invention on to a strip of paper in a conti~1lmls passage mcde.
m e transfer m~chi~e 400 comprises a frame structure 406 carrving a reel 401 of paper, from which a slrip of paper P is un~ound. The strip of paper P firstly passes thr~ugh a successive of rollers forming part of an ~ssPmhly 402 for regulating the tension in the strip, ~hen to the location of an assembly 403 which provides lateral g~ n~e for c~l1e~Lly positioning ~he strip o~ paper :P before ~,e~-ng for transfer of the anti-forgery device~ ~he m~ e also has at least one film reel 430 on which is wound the inltial carrier strip F carrying the anti-forgery de~ice to be transferred. In this case, there ~ e four reels 430 so as to be able simultaneously to ~ ~Ler four reflecting strips for a given width of strip of paper c~lP~nrling to the strip w~und on the xeel 4010 m e strip of. paper P
and the mitial c~ rier strip F meet at the l~cation of a guicle roller 25 404, ~g~;n~ the periphery of which they are ~LL~cLly ~rpl;~ ~y means of a downs~ream roller 405.
m e t~o strips P and.F thus arrive at the transfer station in the txue sense, which is formed by a hot transfer ~$~Pmhly wlth its cylinder 407 which is for example heated by a hot water circulation, the associated circuit not being shown here. me two strips are ~l;e~ against a substa~tial part of the 5t~rface of the heating W O 93/0l0~7 P ~ /EP92/01527 21~7B
cylinder 407 by means of a system of pressing rollers 408 which are carried by mo~able ~rackets 409; Figure 10 shv-ws the two positions of the ~s~mhly of tAe rollers 408, the apera~ing position corresponding to application of the rollers against the surface of the cylinder 407, while the rest position corresponds to initial in~e~tion of the two strips ~ and P beneath that cylinder. The ~l~vv~-~nt from one position to the other is produced by means of application jacks 410 and 411 which make it possible to raise or lawer and i~cl;np the brackets 409 supporting the rollers 408.
Downstream of the transfer station, the strip of paper (on to which the reflecting surface has been transferred) and the r~
part of ~he initial carrier strip (that residual strip then only comprising the polyester layer whicA ser~ed as a ~arrier) pass around a firs~ co~l ing cylinder 414 to which they are ~plie~ by an ~pl;rator roller 412 carried by a pivokally mounted lever 413, the position of the lever being controlled by an ~sociAt~d jack 427. The tw~ strips also pass arcund a second cooling cyli~der 415, ~he strips passing around the ~wo cooling cylinders in an S-~h~e~ configuration in ord~r to provide for satisfactory strip con~act and locking, as is well known in the printing art. The co~ling cylin~r~ 414 and 415 will be for ~xA~rl~ cooled by means of cold water, the associated circult not being sh~wn here. The s~rip of paper P bearing ~he anti-forgery de~ice 100 ~hen passes around an ~cqPmhly 418 serving as a t~n.~ion regulator for the re-winding opera~ion and then mcves ~g~inqt a guide cyl mder 431 A~in.~t which it is ~rpl;~ by a roller 419 carried by a pivotally mounted le~er 425, the position of which is c~nLlolled by an ~cso~;~ted jack 426. The strip of paper P carrying the anti~forgery device 100 then passes ~ yll a lateral ~ n~e ~sPmhly 420 in order here to arrive at a severing station at which it is possible for a plurality of adiacent parallel strips, for example four strips, each comprising a reflecting band (which may be cont;n-7O~l~ or W O 93~01057 ;. P ~ /EP92/01527 ~ 18 discontinllol-s) to be cut up longitll~;n~l1y: the severing station which, as will be appreciated, is in no way obliga~oxv, is formed by a support roller 422 and cutting wheels 421. me cut strips fi~ally pass around guide rollers 423 before final rewinding on to a reel 424.
m e remaining part of the carrier strip (polyester film 200 having served as a carrier), after passing around the coolingcyl~r~
415, passes around a guide roller 416 before finally arriving at a station 417 for re-winding of the polyester film 200.
It will be appreciated that other tyFes of ~hi n~ can be envisaged for providing for transfer of the cont;nllol~ or discontinuous reflecting band, but the above-described transfer station makes it possible to achieve parti~larly satisfactory results. In this respect reference may be made to European patent No 0 089 494 in which a hot transfer apparatus of this type is described.
The invention is not lLmited to the ~m~a~impnts which have just been described but on the contrary it embraces any alLeL~Live configuration which, with equlvalent means, invo~ves the essential features set forth hereinbefore.
Credit or security document comDrising an an~i-forgery device, and a carrier stri~ with transferable pattern ~or Pro~llring such a document The invention concerns credit or security documents and more parti C~ll Arly ~c~m~nts comDrising an an~ orgery de~iGe. me ~ s in ouestion are all fi~uGi~rY or cr~dit ~c~nts or value do~nLs which, by virtue of their nature or the rights which they can ~ , have to be protected from forgeries, f~ if;cation or L~Lcl~ction.
That is the case for ~mnl~ with title ~ ~nLs, certi~icates, cheoues and traveller's cheques, stamps, credit car~s, bonds, vouchers, tickets or security do~ L~ such as identity cards, passports .~., that list not bemg l ~ tative.
It has already been proposed that a metallised wire which is totally or alternati~ely inteqrated into the paper of a d~nt may be used, which wire may be ~n~ode~ by ~ tue of discontin~ c~ating of a wire of non-ferromagnetic material with a ferromagnetic material (see for ~x~mnle British patents Nos 1 Og5 286 and 1 127 043).
That ~L~oedul~ has long been in use bu~ it is always invariably A~SOri ~ted with authentica~ion of ~he ~oK~nt by means o~ a de~ec~or which is espPc;Ally adapted to the wire in question, and does not permit photocopym g of the ~ to be effectively resisted: the image or the wire remains e~Lr~l~ly thin and not only draws little att~ntlon by virtue~of ~min~ion wi~h the naked eye but it ai~s an e~ ly small reflect mg surface which c~lt~.s little disturbance in ~e~u~ction of the ~s~t~nt.
Various ~l~ce~u~s have also been ~ osed, using ~pec;~l inks, in par~i~tlAr inks which are referred to as change-effect inks, ~hich make it possible for example to go from a blue colour to a green colour m p~nAPnce on the ;n~l ;n~tion of the ~ ",~"~, or inks which-cause a colour to A~pP~r ~nly when subjected to a certain ixradiation step (for example W-radiation)~ Reference may be made for example to US patent W O 93~01057 P ~ /EP92/01527 ~ 2 No 4 175 776 and European patents Nos 0 3~7 788 and 0 340 163. Those procedures are generally burdensome so that the use thereof is limited to areas of very small dimensions with respec~ to the ~im~n~i~ns of the ~ t.
It has also been proposed that those methods s~n--be canbined by applying by a transfer operation a continuous repetitive Fxlttern in strip form to a part of the document, and ~,L~intlng that part of the nt using a security ink (see for ~mrle European patent No 0 093 009). As an alternative, in order better to resist colour photocopy m g, it has been ~L~OSed that small areas can be overpr mted with an ink conlaining a possibly coloured reflecting substance~ for example of alumlnium powder . (see for ex~Dle US patents Nos 4 066 280 and 4 352 706).
Mention may also be made of the proceaures which pravide for coat m g the ~nt wlth a very thin metal film and then pri~t m g on a~ ho~s m g the ~oc~n?nt (see for ~ample US patent ~o 4 420 515), as well as the ~ a~ul~S ~ ch involve the ~rP~;c~tion of holograms to a Ao~nPnt ~see for e~xample French patent No 2 535 864, British E~tent No 1 ~17 840 and US patent No 4 171 864), or yet again mtaglio printing (see ~or Px~le French patent No 2 192 496).
Hc~ever, there is no doubt that those ~o~ res make it p~ssible to attract the attention of an alerted or exper;~e~ viewer but they are still relati~ely, bLL~ P ~nd they do not always prov.ide good resistance to ~ c~u~ing of the ~o~nts In question.
An o~ject of the ~l~senL in~ntion is to prcvide a credit or security ~:lo~ .L whose anti~forgery devqce has a higher level of fOr"~n~e than the above ~n~ioned syst~ms, both in regard to e ~ tion with the naked eye and in regard to madern l~yLu~Lion and rl i CA~ g ~LUC~'~1UL~S .
~n~th.er object of the invention is to pr~vide a ~lc~ L which gives a high de~ree o~ pro~ection from L~ ction ~hereof without involving embossing and/or holo~ram methods.
W O 93/01057 PC~/EP92/01527 21i~47~i A further object of the invention is to provide a document in ~hich the anti-forgery device is capable of being set in place both continuously on a strip o~ paper which passes along contimln~l~ly and on documents in ~he form of sheets wnich have already been cut up~
although operation on a reel is generally pxe~erred when possible.
Finally still another object or the invention is to provide a document in which the an~i-forgery device adheres perfectly to said ~c~ ~ ~t and is capable of withstanding wear and/or a ch~m'~l attack by the solvents which are usually employed in the field of printing~
m e invention more particularly c~ncellls a credit or security document comprising an anti-~orgery device characterised in that the anti-forgery device is in the form of a dlscontinuous reflecting surface formed by a succession or indi~idual reflecting elements ~rP~ by transfer to a face of ~he ~cc~ ~ nt and organised in a gen~ral direction of orientation which is predetermined wlth respect to the edges of said ~t~Pnt, each individual reflecting element ha~ing both a dimension which is appreciated transversely to said general direction of several mi 11 ;m~tres and opt ~ ccmpactness for a given xeflection area, in such a way that the re~1ection ~n~m~non is clearly apparent to the naked eye and blinds the known optical analysis or ~L~d~ction sy~tems.
In accordance with a pQrticular feature, A~pl; cAtion of the indi~idual reflect m g elements ~y direct transfer on to a face of the ~ L is con~lnlln1l-q, so that the int~nm~ te spaces between adjacent individual el~ments comprise a n~n-reflecting ~ut nonethel~
vi~;hle co~ering originating from an initial carrier strip which ha~
the ~ ntlnt~olls pattern to be transferred.
In an alternative configuration, ~ ;c~tion of the individual reflecting elements by direct transfer on to a face of the ~o~n~ is con~;ml~ the int~rmF~;~te spaces between adjacent individual ~ eing produced by pr ~ting with a white ~ of a ~;~Cont;nl~
pattern on a continl~oll~ reflecting band, after transfer of said W O 93/01057 P ~ /EP92/01~27 continuous reflecting ~and from an initial carrier 5trip. In accord3nce with another alternative configuration, the int~rmP~iAte s~aces are prc~ e~ by partial dissolution of a continuoll~ reflecting band after transfer thereof from an initial carrier strip.
In accordance with another ~articular feature, ,di~ect transfer results from the mitial carrier strip and a strip of paper being pas5ed between a pressure cylinder and a heating back~ g cylinder; as an alternative, direct transfer results from the initial OE ier strip and a strip of paper ~eing passed bet~een a pressure cylinder with a continuous pressure track and a heating backing cylinder. It is also possible for direct transfer to result from the initial OE ier strip being struck with a die for continuous application on a sheet of pa~er.
In an al~erna~i~e configuration of cont;nllo~ ppl;C~tion of the individual reflecting ~1 ~m~nts, application by direct transfer on to a face of the ~o~ ~ nt may be ~icc~ntinuous~ so tha~ the interme~;Ate spaces between adjacent individual elements are free from any covering.
It is then p~s;hle for the discontinuous character of the pattern to result from an initial carrier strip with a cont;n~lo~l~ reflecting band, and a strip of paper, be m g passed between a pressure cylinder with a ~;ccon~; ~tl~ pressure track and a heating bac~ing cyl m der; as an alternati~e, ~he ~-.cc~n~in-lol1~ ~ acter of the ~a~Ler~l results from the initial ~arrier strip be m g struck wlth a die for ~- ~cnnt; nllotl~
A~pl;~tion, on to a sheet of paper. In that part;~ll~r case, the non-reflec~ing but visible elements referred to above do not appear.
Advan~A~POll~l y also ~ each individual ~1Pm~t is cov~red with a prctective varnish or 1~ r which has a high level of resistance to abrasion and solvents.
Prefer~bly also, each individual ~lpm~nt fo~ms a ~ or rA~h1e of reflect m g all visible wavelengths. Advantageously m that case, the individual reflecting ~l~mP~ts are formed by a fine metal lay~r and preferably a fine layer of alumi m u~; in particular the mirror formed by some at least of the individual reflecting ~l~mPnts is comvlete or 'W O 93/01057 PCT/EP~2/01527 2112~6 flat without being disturbed by geometrical ~m~nts at least partially cover~ng said murror.
Advantageously also, the indi~idual reflecting eleme~ts of the reflecting surface ha~e a contour of quadrila~ural shape.
For example, the contour is in the shape of a re~tangle of which ~n edge is pal-allel to the general direction of orientation of the indi~idual reflecting elements. In an alternative configuration, the contour is in the form of ap~allelogram of which an edge is parallel to the general direction of orientation of the individual reflecting elements and preferably then the okher edge of the parallelogram is inclined at a gi~en angle wqth respect to said general direction of orientation, said angle preferably being close to 45~.
Advantageously in that case the width of the contour, as considered in a direction which is orthcgonal to said general direc~ion of orien~ation, is at least equal to thre~ ~;ll;m~tres and the length of the contour, as ~on~ red in a directicn which is r~r~ 1 to said general direction of orientation, is preferably ~etween four and ten m; 1 1; ~ s .
Preferably also the general direction of orientation of the individual reflecting elemen~s is paral3el to the shcrt side of said It is fin~l ly possible for the ~ ~r~ on its two faces to comprise an anti~forgery device which is in the form of a discontinuous reflecting suxface, said tw~ devices preferably being formed by ;~e~t;c~l individual reflecting ~l~m~nts.
The invention also c-unc~ s a carrier strip campris m g a tranferable reflecting pattern for providing a f; ~ ry or credit L or security do~l~rlL compris m g one at least of the abo~e-~P~;one~ feaL~s, said carrier strip being ~hAr~ctPr;.~e~ in ~hat it is of a m~lti-layex structure with in s~ceq.s;~n an uFper layer of plastic material serving as a carrier, a laver of wax or glue which W O ~3~01057 P ~ /EP92/01527 . 6 melts in the hot condi~ion, a very fine metal layer constituting the reflecting pat~ern to be transferred, and finally a layer of hot-melting glue for affording adhesion of said m~tal layer to a face of a ~ ~ nt of paper.
S Preferably a layer of varnish o~ iacquer is also~provided between the layer of hot-melting glue or wax and the fine m~tal layer, said layer of varnish providing protection for the transferred reflecting pattern, in par~ r in relation to abrasion and solvents.
Advantageously also, ano~her layer of varnish is further provided between the fine metal layer and the adhesion glue layer, said var m sh layer providing protection for the reflecting pattern to preven~
penetration of the metal particles mto the paper of the document upon transfer of the reflecting pattern.
Other features and advantages of the invention will be more clearly apparent from the following description and the ~crmr~ying d~awings concerning a part~ r ~mho~ nt, with reference to the Fi~res ~n ~ich:
Figure 1 is a plan view of a ~ m~nt canprising an anti forgery device acco:rding to the invention, Figure 2 is a view on a larger scale of tw~ individ~ reflecting elements forming part of the abovc ~ Lioned anti-forgery device, Figure 3 ill~LL~Les an alterT~tive fo~n of Figure 2 ~n which the contour vf t~he indi~idual re~1ecting e1~ is rectangular, Figures 4a and 4b are ~wo sections taken along line rV-IV ~n Figuxe 1, illU~Ls~Lm g tw~ alL~Li~e configurations respectively with and withaut a ~L~oLe~Live v~tn;~h, Figures Sa and 5b are tw~ sections illustrat m g the m~lti-layer s~ ~Lule o~ tw~ alternati~e configur ~ ions of an m itial carrier strip according to the invention, ~he carrier strip being us2d to provide fo~
transfer of the a~ti-forgery device, respectively with a~d with~ut p~otective v~rn~.~h ~those Figures are thus to be ccmpared to Figures 4a and 4b above, shcwing the ~n~ ~ nt after transfer of said anti-forgery device~, W O 93/01057 P~T~EP92/01527 21~2~7~
F:igure 6 diagrammatically ill~ d-es con~imlml~ tra~;fer of the anti-forgery device by being passed between tw~ cylLnders comprising a pressure cylinder and a heatinq backing cylinder, FLgure 7 is a profile view illustrating said cylin~ers between S which the strip of paper and the initial carrier~x1p carrying the anti-forgery device to be transferred con~;n~l~u~y pass, Figures 8 and 9 illustrate two alternative forms of Figure 7, ~Lth a pressure cylinder co~pris:ing a pressure track which is discontinuous and cos~tinlloll~ respectively, and Fi.gure 10 is an overall view shawing a machine which ~an be used to ad~rantage for continuouslyeffecting transfer of the a~ti-forgery de~ice on to a strip of paper which moves con~inuously t~rough the rrA~hi n~.
Figure 1 shcws a docl~ent D which is here in the foxm of a rectan~ ar sheet 1, ccmprising an anti-forgery device lOO according to the i~7ention.
In accordance wi~h an essential feature of the invention, the ~nti-forgery device is in the fo~n of a ~; cc~n~; m~ reflectmg sur~ac~ 100 fo ~ by a s~lccP~s;~n of individu~L xeflecting elements 101 organised in a generaL direction DG of orie~ta~ion which is predet~rmin~ wqth respect t3 the edges 11 and 12 of the ~ m~nt.
As will be described in greater detail hereina~ter, the individual reflec~:ing ~lPm~n~s,101 are ~l;e~ by transfer (preferably in the hot co~diti.on) on to a face :L0 of the ~n~ r ~ D. In addition e~ch 2~ indi~iclual re~lecting ~l~m~nt 101 has both a ~;m~n~ , as d~?~ iated tra~v~L~ely to the general direction DG, of several mill;m~tres, and opt;lm~ ccmpactness for a given reflection area which is e~Luated by a co~ff;c7ent cvrresp~nC~;ng to the reflection areafperimeter ratio, in such a ~ay ~hat the reflection ph~ n is cle ~ly apparent to ~he naked eye and blinds the kncwn opti~al analysis or ~ ction system~ in particullr ~y virtue of a high reflection c~city an~
W O 93/0l057 ~ ~ PCTJEP92/01527 relatively large reflection surfaces. ~ny value which is at least equAl to O.S mm is considered satisfactory, for the above-mentioned ratio~
The document D here comprises a pr m ted graphlc device G and a discontinuous reflecting surface 100 whose general.d~rection DG is p2rallel to the short side 11 of the ~ L~ It will be appreciated that such ~1 arrangement is only one possible ~m~le but the orientation DG which is selected to be parallel to one of the edges of the document, in this case the short edge, is advantageous when the intention is for the ~ npnt to be passed into an autcmatic process.ung ma~h; ne, in which case the document then mDves parallel to one of its edges.
Each individual element 101 can thus foLm a mirror which is capable of reflecting all visible wavelengths. Prererably in that c~se, individual reflect m g ~1 ~mPnts 101 will be fo ~ by a fine metal lay~r and in particular a f me layer of all~l ni lm~ . By way of 1 n~i c~tion, that layer may he of the order of 0005 ~m in thickness.
m e choice of all~i n; l~n is advantageous for its very high coefficient of reflec~ion, but it is apparent th~lt it w3uld be possible to choose cther metals such as for example chromium. The mlrror formed by scme at least of the individ~ reflecting ~l ~m~nt~ 101 is preferably complete or flat, without being disturb~d by geometrical elem~nts which at least partially co~er said mirror.
~he ~; cronti nllolls surface 100 which is for~ed by a plurality of individu~l reflect m g ~l~m~n~ 101 thus ~ ts substantial ~7.1 inq of the analysis or ~ u~Lion s~L~-~, by virtue of the large ~;m~n~ion of each or the individual reflecting ~l~m~t~ 101 In a direction ~hich is transverse to the g~n~r~l direction ~G. For tha~
reason it ~h~ be noted that the known procedure which involv~s alterna~ively ~mhP~in~ a metal band or strip in the paper did not m~ke it possible to pro~uce a band whose width exceeds a ~ill;m~re~
~ W O 93/010~7 P ~ /EP92/01527 2 ~ 7 ~
~. 9 In this c~se, by virtue of a transfer procedure, it is possible to use .,. a ~i~continuo1s surface wnose width ~cP~ 3 mm and can ev~n go up to 10 ~
In addition, still in order to prcvide for ~ A~ g of the analysis or reproduction syste~ each individual ref~ecting element 101 must exhibit cpkimum comcac*ness for a given reflection area. That means that the surface area of each individual reflecting element lOl is as large as possible for a given perImeter or that the diameter of the largest circle which can be inscribed in the contour of an individual reflecting element, for a given reflection area, is at a ., .
Figure 2 is a view on a larger scale of two individual reflecting elements lOl which are paxt of the above mentioned anti-forgery device 100, each individual reflecting element lOl in this case be~ng of a con~our C in the form of a quadrilateral and more precisely here in the form of a par~llPlc~ram. Each m dividual reflecting element lOl is thus distributed m a discontim1o~l~ mAnn~r between two lines 105, 106 ; which are parallel ~o ~he general d:Lrection DG of the ~i ~Conti n~lQll~
suxface lO0. In an alL~rl~Live confi~lration, as shown in Figure 3, it is possible ~o use a contour C in the fo~m of a rectangle of which an edge ~in this case the edge 103) is p~rAl lel to the general direction DG. The Pmh~im~nt of Fi ~ e 2 is preferable hcwever insofar as it makes it possible to have a short le~;n~ edge at an end point of each individual reflecting element, and c~cP~uently it makes it possible better to resist the risk of the me~al particles which are transferred on to the ~f~",~ b~ccm;~g detached. In the configuration shcwn m Figure 2, ~he edge 103 of each individual reflecting element lOl is p~rallel to ~he direction DG, with a ~;m~n~ L which is preferably of the order of fro~ 2 to lO mm, while the short edge 104 is ;ncl;ne~
at a given angle with le~LecL to the general direction DG, ~hat angle pre~rably being close to 45~. The ~im~n~ions of the mdividual .
., ,"~,,, " ,~, " , ~ , . ,,, ., . .~ ~ ' W O 93/01057 ~ ~ P ~ /EP92~01S27 ; rectangular reflecting elements illustrated in ~igure 3 are preferably iden~ical to those indicated ab~e, with a width 1 of the order of from 2 to 10 mm tthat wldth corresponding ~o the distance between the contour lines 105, 106) and a length L of the order of from 2 to 10 mm. m ose dimensions will be selected in such a wa~ as to give a m;nim~ surface area of 10 mm2 for each individual reflecting element.
Such individual r~flecting elements make it possible to achieve an extremely satisfactory coefficient of mirror reflection as the ef~ective width of each of those elements is relatively substantial, , 10 said effective width ~l~oLe~r being considerably greater than thatwhich could be obtained with a strip or band which is alternatively ~mhe~ in the paper of the document.
Figure 1 shows the existence of a discontimlou~ surface 100 constituting the anti-forgery device on a face 10 of the document D, 15 but it is apparent that it is possible to provide such an anti-forgery device on the two faces of the document, each anti-forgery de~ice be m g in the fo~m of a ~ n~lnuolls reflecting surface and the tw~
" devices then preferably being formed by identical individual r reflec~ing ~l~m~nts 101. That makes it p~.s.sihle to y~ c~ a 20 reflec~ion p~p~m~non which is clearly apparent to the naked eye and which bl in~ the known optical analysis or l~ylcdu~Lion systems, irrespective of the way in which the ~oc~npnt is faced~
As stated hereinbefore, the su~cP~ n OI individual reflecting ts 101 is ~rpli~ ~y transfer, preferably in the hQt condition, 25 on to a face of the do~ r~ pl; ~tion b~ direct transfer on to a face of the ~u~ L can be cont;nlloll~ so that the int~rm~;ate spaces 102 between adjacent indi~idual reflecting elements 101 comprise a non-~eflecting but nonet~Pless ~isible co~ering originating from an m itial carrier strip having a discontinuous ~aLLell. to be 30 transferred. Fi~ure 6 diayL~l~Lically illu~LL~Les cont;ntloll~ tr~nsfer of that kind of the anti-forgery device (whose p~ttern is here , , W O 93/01057 ~ P ~ /EP92/01527 discontinuous) by ~eing passed between two cylinders comprising a pressure cylinder and a heating backing cYlindero Figure 6 shows a reel 310 frcm which there is unwound a strip of paper P which passes ar~und sl~cc~ssive rollers 311, 312 and 313 before p2ssing between a pressure cylinder 300 and a heatinq_backing cylinder 301. An initial carrier strip F bearing the pattern to be ~ransferred is unwound from a reel 314 in order also to pass between the cylinders 300 and 301, with the tw~ strips P and F thus being pressed against each other, w1th the application of a given tempe~dLUL~, for hot ~ransfer of the discontimloll~ pattern in such a way as to produce the desired ~i ~cnn~ 0~ C reflecting surface 100 with its succession of individu21 reflec~ing el nts 101. Downstream of the transfer, the carrier strip F or more precisely the residual part thereof wnich serve~ to carry the discontinuous pattern to be transferred is wound on to a reel 315. In this case, two smooth cylinders 300 and 301 are used, as can be seen from Figure 7. That provides for a transfer wqth clean edges, without ~ ; ng of the paper. After the transfer operation howe~er the paper is heavily satined or ~ (its gl~l n~
has been substa~tially mLlt;r~ by 5), the thickness of tha paper has decreased (substantially by 10%) and the paper has 1~ LJ~ very slightly in the dlrection of ~ v~l~nt (i~n elongati~n of the order of 2 /oo is n~rnt~l~y Pn~lntPred). When the ~oct ~ nt D also has a wrk, which is ~he case in par~;ct1l~r with bank notes, the wa~rm~rk has then lost its sharpness i~fter transfer of the discon~-in~lol~ reflecting pattern.
It is possible to ~ v~ the transfer of that ~;c:cnntinuous pattern by providing a slightly different pressure cyl;n~Pr, as shown in Figure 9: in fact, in this case the press~re cylinder 302 cnmprl .~es a con~;nt~nll~ pressure track 303 which presses the init~ll c~rrier s~rip F against the strip of paper P, beiring ;tg~n.~t ~le heat m g backing cylinder 301~ That then retains the ad~antage of a transfer 1~ .1: ... .
W O 93/01057 P ~ /EPg2/01527 with clean edges and wi~hout .?mho~ing of the paper, but, by virtue of the locally ;t~.pl i~r presstlre, that a~rang.~ment also pr~vides for a lack of satining or g1~ g of the paper and preservation of the sharpness of the watermark when the latter is prcvided.
It is also possible h.~wever to use an initia~-~carrier strip F
ccmprising a continuous reflectiny band to be transferr~d on to the do.~ument.
In that case it is possible ~o choose ei~her c.ont;nllotl~ tran_-.fer of the cont;r.~1ou~ reflecting band on to the paper a~d then arrange for a particular operation on the transferred continuous reflecting band to produce the in~rmP~-ate spaces between adjacent individual elements, or, in an alternative mode of operation, it is possible to provide for discontinuous trans~er of portions of the continuous reflecting band in order then directly to produce the intprmp~;~te spaces between adjacent individual ele~tents.
When the ~ ul~ adopted :is con~;n~ a~l;c~tion of a cont;nuou~ reflecting band, it is then possible to produce the int~rmP~i~te spaces 102 between adjacent ~.tdividual elements lOl by printing with a white ink of a ~i~cont;n~lol~ pattern on the transferred continl1o~1~ reflecting band or, in an alternative ~LU~dUL~ it is possible to ~lu~u~e those int~nmP~;~te spaces by partial dissolution of the transferred continuous reflecting band.
In ~he case of ~;~cnntimlouc ~p7;~tion, as shcwn in Figure 8 it will be possible to provide that the ~i~cont;ntlolls h~ractex of the k~ results from the initial carrier strip F with a co~im o1-~reflecting band and the strip of paper P be m g passed between a pressure cylinder 304 wlth a discon~in~lm1~ pressure track 305 and a heating bac~ing cylinder 301. me ~; ~cn~tl ~uol~ character of the pattern then results from a knurl m g action by the ~i~c~n~i ~uoll~
pressure track 305 on the Con~i~u~l~ reflecting band. Hcwever it is difficult to avoid flakes of reflecting material.being r~nmly torn W O 93/0l057 P ~ /EP~2/01527 away at the boundaries of the contours of the indi~idual reflecting elements, which flakes may interfere with subsequent offse~ prlnting on the ~o~nn3nt. It is easy to understand that transfer of a discontinuous band by means of a cQnti~ pressure cylinder (Figure 7) or by means of a cyl mder with a con~in~ s pre,~sure track (Figure 9) makes it possible to avoid the formation of such flakes of reflecting material.
In an alternative configuration of direct transf~r of the rotary type which has just been described above, it will be appreciated that it is possi~le to provide for direct transfer resulting frcm the initial carrier s~rip being struck with a die for applying same to a sheet of paper, wit~in ~he framew~rk of a procedure for transfer on to a sheet. That mcde of operation whIch is not shcwn here i5 well kncwn to those skilled in the pr mting art and it may concern transfer of a lS con~ l~tS reflecting band on to the paper (ln that case the ~rPl; r~tion die is can~; m~ if the ~Loce~re involves a ~ubsequent printing operation us mg a white ink on the transferred contin~ q reflecting band or partial ~;~solution of the transferred cont;ntl~
- reflecting band or it is ~;Ccontinllolls if such operations are to be a~oided), as well as transfer of a discont;ntl~l~ reflec~ing band (in that case ~he ~r~licatiGn die preferably being con~inllo m e m~lti~layer ~Ll~LuL~ of an initial carrier strip according to the invention will now be described, that carrier strip bei~g used to prcvide fox trans~er of the abu~ ;fied anti-forgery device, this being ~rp1;r~hle both in relati~n to a contim~ and a discon~iml~-~kaLLelll to be transferred.
The view in section shown in Figure 5a thus illustrates an initial ~arrier strip F which s~trcp~slvely comprises an upper layer 200 serving as a carrier, a layer 202 of hot-melting glue or wax, a very fine metal layer 201 for ~xAm~le of aluminium c~nstituting the reflecting ~and to be tr~ ~L~rl~d, and f;n~l ly a layer 203 of hot-melting glue. The layer 200 will preferably be of plastic material, W O 93/01057 P ~ /EP92/02527 ~ 14 being f or ~ample a layer of polyester which is fr ~ lO to 15 ym in thickness, while the metal layer 201 will be of the order of a few hundredths of a mucron, for examDle 0~05 ~m. The wax or glue corresponding to the thickness 202 serves to provide for separation between the polyester la~er 200 and the m~tal layer, 2~1 m the hot transfer operation, and it will be of the order of from 2 to 5 ~m m thickness. me glue constituting the layer 203 serves in turn to provide for ~h~ n between the metal layer 201 and the paper, and its ~hic~ness will al50 be of the order of 5 ~m. It will be advantageous to prcvi~e that the ma~erial forming the layer 202 mel~s at a temperature Tl which is lcwer than the t~,4eldL~re T2 at which the adhesion layer 203 melts, in order to produce separation of the metal layer 201 ~rom the polyester layer 200 just prior to transfer of the metal layer. By way of in~ic~tion~ the transfer operation will be effected using temperatures ranging from 110 to 150~C. After transfer, the document appears in section as illustrated in Figure 4a: it is thus po~s;hle to see a sll~cP~sion of individual reflecting ~lpm~nts 101 which are se~arated by in~ .&~ te spaces 102, aNd also traces 203' r~in;ng from the glue 203, which have pell~Ll~Led into the paFer 1 j~st ~elow the upward face of the ~c~ t~ The l,lL~?~rli~te spaces 102 between adjacerlt individual elements lOl may cnm~r; ~e a non-reflecting but nonetheless vi ~;hle covering orig~nating fran the initial carrier strip F having the discon~i n~ pattern to be transferred. The non reflecting cover m g will crmrri-~e in this case the hot-~rpl;cAtion g7ue 203' but also pn~;hly a protective varnish or lacquer, as will be described in the alternative confisuration hexe m after.
Figure Sb illustrates a carrier strip F haviny a multi-~ayer ~Ll~L~ which is more cnmrlPx than that described abcve, insofar as it has two protective uarnish layers.
This sLl~L~re again comprises the upper polyester layer 200 serving as a carrier and the layers 202 and 203 of hot-meltLng glue W O 93/01057 P ~ /EP~2/01527 21124~
with, fo.r the lat~er, a choice of material such that adhesion to the p~per is stronger than adhesion to the polyester carrier~ Ho~ever the met~ ~ zone corresp~n~i ng to the layer 201 is here si~ndwiched between ~wo layers of varnish 204 and 205, the thickness of which is of the o:rder of from 1 to 5 ~. me upper layer of~v~rnish ;204 makes it possilale to provide for protection of the transferred ~dividual reflecti~lg elements 101, having a high level of resistance to abrasion and solvents. The lo~er layer of varnish 205 also protects the metallised zane correspon~ing to the layer 201, by preventing the lQ metal particles from penetrating into the paper in the transfer operation~ Af~er transfer, the ~o~ ~Pnt is as illustrated in section in Figure 4b: as before, there are ayain the individual reflecting elements 101 which are sep~rated by intPrmP~i~te s~aces 102, and traces oi. glue 203' originat:ing from the layer 203. However, and unlike the sectional view shawn in Figure 4a~ Figure 4b ncw shows a protective film produced from the layexs of varnish 204 and 205, the upper lay~er corresponding to the lay~r for protecti~g the whole of the ~;cc~n~;n~ reflecting ~uLL~. In ~his case the int~rmFfl;~te spaces 102 ~o~prise a non-reflecting ccver~lg which is perfectly vn~;hle ~o the naked eye an~ which c~mprises pr~tective varnish and trace!s of the hot-~rp~ tion glue. It ~ho~ however be noted that the thi.c~nesses of v~rni~h have decreased in t-he transfer operation, by ~irtu.e of the pressure ~nd temperature invol~d.
In t~e case of ~ on~;m~ c~tion of the i~ividual reflectin~ elements by direct LL~sLer on to a face of the ~
the int~rm~ te spaces 102 between adjacent individual el~l,enLs 101 are pract:ically free o~ any co~ering.
Still. in order to provide for nR~-~ da~zle for optical analysis or L~L~iL~ction systems, it will be an attractive yL~os-ition to provide as large a number as pos~ihle of m dividual reflect m g ~l~m~nts 101 for a given ~;m~n~ion of the ~o~ J-L. Preferably then W 0 93/01057 P ~ /EP92/OlS27 & 16 the spacing 102 between adjacent individual elements will be of the order of a fraction of the lenqth of ~he contour of those el~ents, as considere~ in a direc~ion parallel to the general direction of orientation DG Thus, with a rectansular document such as a banknote i which is of the order of 80 mm in wid~h, it will_~e possible to arrange a~ least five individ~l reflecting elements to constitute the dicontin~lous reflecting surface formung the anti-forgery device.
Re~erence will now be made to Figure 10 to described a mach me which can be advantageously used ~or continuously effecting transfer of the anti-forgery device according to the invention on to a strip of paper in a conti~1lmls passage mcde.
m e transfer m~chi~e 400 comprises a frame structure 406 carrving a reel 401 of paper, from which a slrip of paper P is un~ound. The strip of paper P firstly passes thr~ugh a successive of rollers forming part of an ~ssPmhly 402 for regulating the tension in the strip, ~hen to the location of an assembly 403 which provides lateral g~ n~e for c~l1e~Lly positioning ~he strip o~ paper :P before ~,e~-ng for transfer of the anti-forgery device~ ~he m~ e also has at least one film reel 430 on which is wound the inltial carrier strip F carrying the anti-forgery de~ice to be transferred. In this case, there ~ e four reels 430 so as to be able simultaneously to ~ ~Ler four reflecting strips for a given width of strip of paper c~lP~nrling to the strip w~und on the xeel 4010 m e strip of. paper P
and the mitial c~ rier strip F meet at the l~cation of a guicle roller 25 404, ~g~;n~ the periphery of which they are ~LL~cLly ~rpl;~ ~y means of a downs~ream roller 405.
m e t~o strips P and.F thus arrive at the transfer station in the txue sense, which is formed by a hot transfer ~$~Pmhly wlth its cylinder 407 which is for example heated by a hot water circulation, the associated circuit not being shown here. me two strips are ~l;e~ against a substa~tial part of the 5t~rface of the heating W O 93/0l0~7 P ~ /EP92/01527 21~7B
cylinder 407 by means of a system of pressing rollers 408 which are carried by mo~able ~rackets 409; Figure 10 shv-ws the two positions of the ~s~mhly of tAe rollers 408, the apera~ing position corresponding to application of the rollers against the surface of the cylinder 407, while the rest position corresponds to initial in~e~tion of the two strips ~ and P beneath that cylinder. The ~l~vv~-~nt from one position to the other is produced by means of application jacks 410 and 411 which make it possible to raise or lawer and i~cl;np the brackets 409 supporting the rollers 408.
Downstream of the transfer station, the strip of paper (on to which the reflecting surface has been transferred) and the r~
part of ~he initial carrier strip (that residual strip then only comprising the polyester layer whicA ser~ed as a ~arrier) pass around a firs~ co~l ing cylinder 414 to which they are ~plie~ by an ~pl;rator roller 412 carried by a pivokally mounted lever 413, the position of the lever being controlled by an ~sociAt~d jack 427. The tw~ strips also pass arcund a second cooling cyli~der 415, ~he strips passing around the ~wo cooling cylinders in an S-~h~e~ configuration in ord~r to provide for satisfactory strip con~act and locking, as is well known in the printing art. The co~ling cylin~r~ 414 and 415 will be for ~xA~rl~ cooled by means of cold water, the associated circult not being sh~wn here. The s~rip of paper P bearing ~he anti-forgery de~ice 100 ~hen passes around an ~cqPmhly 418 serving as a t~n.~ion regulator for the re-winding opera~ion and then mcves ~g~inqt a guide cyl mder 431 A~in.~t which it is ~rpl;~ by a roller 419 carried by a pivotally mounted le~er 425, the position of which is c~nLlolled by an ~cso~;~ted jack 426. The strip of paper P carrying the anti~forgery device 100 then passes ~ yll a lateral ~ n~e ~sPmhly 420 in order here to arrive at a severing station at which it is possible for a plurality of adiacent parallel strips, for example four strips, each comprising a reflecting band (which may be cont;n-7O~l~ or W O 93~01057 ;. P ~ /EP92/01527 ~ 18 discontinllol-s) to be cut up longitll~;n~l1y: the severing station which, as will be appreciated, is in no way obliga~oxv, is formed by a support roller 422 and cutting wheels 421. me cut strips fi~ally pass around guide rollers 423 before final rewinding on to a reel 424.
m e remaining part of the carrier strip (polyester film 200 having served as a carrier), after passing around the coolingcyl~r~
415, passes around a guide roller 416 before finally arriving at a station 417 for re-winding of the polyester film 200.
It will be appreciated that other tyFes of ~hi n~ can be envisaged for providing for transfer of the cont;nllol~ or discontinuous reflecting band, but the above-described transfer station makes it possible to achieve parti~larly satisfactory results. In this respect reference may be made to European patent No 0 089 494 in which a hot transfer apparatus of this type is described.
The invention is not lLmited to the ~m~a~impnts which have just been described but on the contrary it embraces any alLeL~Live configuration which, with equlvalent means, invo~ves the essential features set forth hereinbefore.
Claims (26)
1. A credit or security document comprising an anti-forgery device in the form of a discontinuous reflecting surface formed by a succession of individual reflecting elements being organised in a predetermined general direction of orientation with respect to the edges of said document, each individual reflecting element having both a dimension transversely to said general direction of at least three millimetres and optimum compactness for a given reflection area, i.e. a coefficient corresponding to the ratio of reflection area/perimeter of the given reflection area being at least equal to 0.5 mm, characterised in that, each individual reflecting element forms a mirror capable of reflecting all visible wavelengths, the mirrors formed by some at least of the individual reflecting elements being complete or flat without geometrical elements at least partially covering said mirror, in that the reflecting elements are transfer elements applied by transfer from a carrier strip to a face of the document, and in that the reflecting elements have a contour in the form of a quadrilateral, the length of the contour as considered in a direction which is parallel to said general direction of orientation of each reflecting element being between four and ten millemetres.
2. A document according to claim 1, characterised in that each individual element is covered with a protective varnish which has a high level of resistance to abrasion and solvents.
3. A document according to claim 1 characterised in that the individual reflecting elements are formed by a fine metal layer and preferably a fine layer of aluminum.
4. A document according to claim 2 characterised in that the individual reflecting elements are formed by a fine metal layer and preferably a fine layer of aluminum.
5. A document according to claim 1, 2, 3 or 4, characterised in that the contour is in the shape of a rectangle, of which an edge is parallel to the general direction of orientation of the individual reflecting elements.
6. A document according to claim 1, 2, 3 or 4, characterised in that the contour is in the form of a parallelogram, of which an edge is parallel to the general direction of orientation of the individual reflecting elements.
7. A document according to claim 6, characterised in that the other edge of the parallelogram is inclined at an angle with respect to said general direction of orientation.
8. A document according to claim 6, characterised in that the other edge of the parallelogram is inclined at an angle of about 45° with respect to said general direction of orientation.
9. A document according to claim 1, 2, 3 or 4 which is of a rectangular shape, characterised in that the general direction of orientation of the individual reflecting element is parallel to the short side of said document.
10. A document according to claim 1, 2, 3, or 4, characterised in that it comprises a pair of opposite faces having on each of its opposite faces an anti-forgery device which is in the form of a discontinuous reflecting surface.
11. A method for making a document according to claim 1, 2, 3 or 4, characterised in that the individual reflecting elements are applied to the face of the document by direct, continuous transfer from an initial carrier strip having a discontinuous pattern of the individual reflecting elements so that the intermediate spaces between adjacent individual elements comprise a non-reflecting but nonetheless visible covering on the document.
12. A method for making a document according to claim 1, 2, 3 or 4, characterised in that the individual reflecting elements are applied to the face of the document by direct, continuous transfer from an initial carrier strip having a continuous reflecting band, the intermediate spaces between adjacent individual reflecting elements being produced by printing after transfer with a discontinuous pattern with white ink on the continuous reflecting band.
13. A method for making a document according to claim 1, 2, 3 or 4, characterised in that the individual reflecting elements are applied to the face of the document by direct, continuous transfer from an initial carrier strip having a continuous reflecting band, the intermediate spaces between adjacent individual reflecting elements being produced by partial dissolution of the reflecting layer after transfer of the continuous reflecting band to the face of the documents.
14. A method according to claim 11, characterised in that the reflecting elements are directly transferred from the carrier strip to a paper document by passing the initial carrier strip and a strip of paper between a pressure cylinder and a heating backing cylinder.
15. A method according to claim 12, characterised in that the reflecting elements are directly transferred from the carrier strip to a paper document by passing the initial carrier strip and a strip of paper between a pressure cylinder and a heating backing cylinder.
16. A method according to claim 13, characterised in that the reflecting elements are directly transferred from the carrier strip to a paper document by passing the initial carrier strip and a strip of paper between a pressure cylinder and a heating backing cylinder.
17. A method according to claim 11, characterised in that the reflecting elements are directly transferred from the carrier strip to a paper document by passing the initial carrier strip and a strip of paper between a pressure cylinder with a continuous pressure track and a heating backing cylinder.
18. A method according to claim 12, characterised in that the reflecting elements are directly transferred from the carrier strip to a paper document by passing the initial carrier strip and a strip of paper between a pressure cylinder with a continuous pressure track and a heating backing cylinder.
19. A method according to claim 13, characterised in that the reflecting elements are directly transferred from the carrier strip to a paper document by passing the initial carrier strip and a strip of paper between a pressure cylinder with a continuous pressure track and a heating backing cylinder.
20. A method according to claim 11, characterised in that the reflecting elements are directly transferred from the carrier strip to a paper document by striking the initial carrier strip with a die for continuous application on a sheet of paper.
21. A method according to claim 12, characterised in that the reflecting elements are directly transferred from the carrier strip to a paper document by striking the initial carrier strip with a die for continuous application on a sheet of paper.
22. A method according to claim 13, characterised in that the reflecting elements are directly transferred from the carrier strip to a paper document by striking the initial carrier strip with a die for continuous application on a sheet of paper.
23. A method of making a document according to claim 1, 2, 3 or 4, characterised in that the individual reflecting elements are discontinuously applied by direct transfer on to a face of the document, so that the intermediate spaces between adjacent individual elements are free from any covering.
24. A method according to claim 23, characterised in that for producing a discontinuous pattern an initial carrier strip with a continuous reflecting band and a strip of paper forming the document are passed between a pressure cylinder with a discontinuous pressure track and a heating backing cylinder.
25. A method according to claim 23, characterised in that for producing a discontinuous pattern an initial carrier strip with a continuous reflecting band is struck with a die for discontinuous application against a sheet of paper.
26. A document according to claim 10, characterised in that said two devices are formed by identical individual reflecting elements.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP91401925.2 | 1991-07-10 | ||
| EP91401925A EP0522217B2 (en) | 1991-07-10 | 1991-07-10 | Fiduciary document or security document bearing an anti-forgery device and process for the manufacture of such a document |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2112476A1 CA2112476A1 (en) | 1993-01-21 |
| CA2112476C true CA2112476C (en) | 1999-02-09 |
Family
ID=8208593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002112476A Expired - Fee Related CA2112476C (en) | 1991-07-10 | 1992-07-07 | Credit of security document comprising an anti-forgery device, and a carrier strip with transferable pattern for producing such a document |
Country Status (25)
| Country | Link |
|---|---|
| EP (1) | EP0522217B2 (en) |
| JP (1) | JPH07502941A (en) |
| KR (1) | KR0137807B1 (en) |
| AR (1) | AR247508A1 (en) |
| AT (1) | ATE127397T1 (en) |
| AU (1) | AU659478B2 (en) |
| BR (1) | BR9206254A (en) |
| CA (1) | CA2112476C (en) |
| DE (1) | DE69112823T3 (en) |
| DK (1) | DK0522217T4 (en) |
| ES (1) | ES2077194T5 (en) |
| FI (1) | FI97536C (en) |
| GR (1) | GR3018076T3 (en) |
| HK (1) | HK101496A (en) |
| ID (1) | ID1016B (en) |
| IE (1) | IE69045B1 (en) |
| MX (1) | MX9204073A (en) |
| NO (1) | NO306503B1 (en) |
| OA (1) | OA09795A (en) |
| PT (1) | PT100676B (en) |
| RU (1) | RU2060903C1 (en) |
| TN (1) | TNSN92055A1 (en) |
| TR (1) | TR26198A (en) |
| TW (1) | TW200432B (en) |
| WO (1) | WO1993001057A1 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2050228C (en) * | 1991-08-29 | 1996-10-29 | Trevor Merry | Security device comprising optically variable data and method for making the same |
| GB9202940D0 (en) * | 1992-02-12 | 1992-03-25 | Amblehurst Ltd | Image enchancement |
| ES2075787B1 (en) * | 1993-02-08 | 1998-07-16 | Nacional Moneda Timbre | IMPROVEMENTS INTRODUCED IN THE PROCEDURES FOR OBTAINING SECURITY PAPER, ESPECIALLY CURRENCY PAPER. |
| EP0625466B1 (en) * | 1993-05-17 | 1997-05-02 | De La Rue Giori S.A. | Image applying device in a security printing machine |
| DE4432062C1 (en) * | 1994-09-09 | 1995-11-30 | Kurz Leonhard Fa | Visually identifiable optical security element for credit cards etc. |
| GB9607788D0 (en) * | 1996-04-15 | 1996-06-19 | De La Rue Thomas & Co Ltd | Document of value |
| NL1008929C2 (en) | 1998-04-20 | 1999-10-21 | Vhp Ugchelen Bv | Substrate made of paper provided with an integrated circuit. |
| DE19941295A1 (en) † | 1999-08-31 | 2001-03-01 | Giesecke & Devrient Gmbh | Security element |
| DE10150293B4 (en) | 2001-10-12 | 2005-05-12 | Ovd Kinegram Ag | security element |
| FR2830792A1 (en) * | 2001-10-12 | 2003-04-18 | Banque De France | Fabrication of security documents incorporating a code zone made up of predetermined positions associated with the presence or absence of metallised zones |
| DE10216563B4 (en) | 2002-04-05 | 2016-08-04 | Ovd Kinegram Ag | Security element as photocopy protection |
| DE10227198A1 (en) * | 2002-06-18 | 2004-01-08 | Steuer, Armin | Method for applying hologram on to material web e.g. for packaging, requires embossing mechanism for applying hologram layer at same time as hologram is generated |
| BR0212771A (en) | 2002-07-25 | 2004-10-13 | Orell F Ssli Sicherheitsdruck | Security Document and Verification Method |
| KR100530344B1 (en) * | 2002-12-02 | 2005-11-22 | 코리아케미칼 주식회사 | Transfer paper by heat able to dissolve a metal layer partially and the preparation method thereof |
| FR2856339B1 (en) * | 2003-06-23 | 2006-05-26 | Banque De France | SECURITY BAND FOR DOCUMENTATION AND SECURE DOCUMENT |
| US7243951B2 (en) | 2003-08-19 | 2007-07-17 | Technical Graphics, Inc. | Durable security devices and security articles employing such devices |
| GB0326079D0 (en) | 2003-11-07 | 2003-12-10 | Rue De Int Ltd | Security device |
| EP1744904B2 (en) | 2004-04-30 | 2019-11-06 | Giesecke+Devrient Currency Technology GmbH | Sheeting and methods for the production thereof |
| FR2943800A1 (en) * | 2009-03-30 | 2010-10-01 | Arjowiggins Security | SECURITY ELEMENT COMPRISING ELEMENTARY REFLECTING STRUCTURES. |
| DE102011115133A1 (en) * | 2011-10-07 | 2013-04-11 | Giesecke & Devrient Gmbh | Method and device for producing a sheet-like substrate |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1413910A (en) * | 1963-07-08 | 1965-10-15 | Portals Ltd | Improvements to security papers |
| GB1604463A (en) * | 1976-09-24 | 1981-12-09 | Bank Of England | Security devices |
| GB1574614A (en) * | 1977-04-05 | 1980-09-10 | Planer Ltd G V | Security sheet material |
| EP0070172B1 (en) * | 1981-07-13 | 1985-08-14 | Portals Limited | Paper incorporating a partially embedded strip, methods for making paper and security documents |
| FR2565268B1 (en) * | 1984-06-05 | 1987-10-30 | Guerimand Voiron | NON-PHOTOCOPIABLE PRINTING MEDIA |
| US4615883A (en) * | 1985-10-23 | 1986-10-07 | Plant Genetics, Inc. | Hydrogel encapsulated nematodes |
| US4652015A (en) * | 1985-12-05 | 1987-03-24 | Crane Company | Security paper for currency and banknotes |
| DE8616114U1 (en) * | 1986-06-14 | 1986-08-21 | Leonhard Kurz GmbH & Co, 8510 Fürth | Embossing foil, in particular hot stamping foil |
-
1991
- 1991-07-10 EP EP91401925A patent/EP0522217B2/en not_active Expired - Lifetime
- 1991-07-10 DK DK91401925T patent/DK0522217T4/en active
- 1991-07-10 DE DE69112823T patent/DE69112823T3/en not_active Expired - Lifetime
- 1991-07-10 ES ES91401925T patent/ES2077194T5/en not_active Expired - Lifetime
- 1991-07-10 AT AT91401925T patent/ATE127397T1/en not_active IP Right Cessation
-
1992
- 1992-07-07 BR BR9206254A patent/BR9206254A/en not_active IP Right Cessation
- 1992-07-07 AU AU22301/92A patent/AU659478B2/en not_active Expired
- 1992-07-07 WO PCT/EP1992/001527 patent/WO1993001057A1/en active Application Filing
- 1992-07-07 JP JP5501966A patent/JPH07502941A/en active Pending
- 1992-07-07 CA CA002112476A patent/CA2112476C/en not_active Expired - Fee Related
- 1992-07-08 AR AR92322714A patent/AR247508A1/en active
- 1992-07-09 RU SU925052004A patent/RU2060903C1/en active
- 1992-07-09 FI FI923177A patent/FI97536C/en active IP Right Grant
- 1992-07-09 NO NO922702A patent/NO306503B1/en not_active IP Right Cessation
- 1992-07-09 PT PT100676A patent/PT100676B/en not_active IP Right Cessation
- 1992-07-09 OA OA60244A patent/OA09795A/en unknown
- 1992-07-09 TW TW081105433A patent/TW200432B/zh active
- 1992-07-10 TN TNTNSN92055A patent/TNSN92055A1/en unknown
- 1992-07-10 TR TR92/0653A patent/TR26198A/en unknown
- 1992-07-10 ID IDP358792A patent/ID1016B/en unknown
- 1992-07-10 MX MX9204073A patent/MX9204073A/en not_active IP Right Cessation
-
1993
- 1993-12-24 IE IE922266A patent/IE69045B1/en not_active IP Right Cessation
-
1994
- 1994-01-10 KR KR94700161A patent/KR0137807B1/en not_active IP Right Cessation
-
1995
- 1995-11-15 GR GR950403194T patent/GR3018076T3/en unknown
-
1996
- 1996-06-13 HK HK101496A patent/HK101496A/en not_active IP Right Cessation
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |