CA2226559A1 - Production of security document having a metallic security feature - Google Patents
Production of security document having a metallic security feature Download PDFInfo
- Publication number
- CA2226559A1 CA2226559A1 CA002226559A CA2226559A CA2226559A1 CA 2226559 A1 CA2226559 A1 CA 2226559A1 CA 002226559 A CA002226559 A CA 002226559A CA 2226559 A CA2226559 A CA 2226559A CA 2226559 A1 CA2226559 A1 CA 2226559A1
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- CA
- Canada
- Prior art keywords
- region
- security
- substrate
- paper
- metal
- 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.)
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Classifications
-
- 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
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
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- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Paper (AREA)
- Adornments (AREA)
- Coating By Spraying Or Casting (AREA)
- Printing Methods (AREA)
Abstract
A method of making a reflective security feature on security paper comprises spraying metal onto the surface of the paper, whereby to produce an extensive region (9) of sprayed metal on the surface of the paper (2); and crushing, burnishing or otherwise treating the surface of the sprayed metal to convert it to a more specularly reflective surface, which may be formed into a relief pattern.
Description
CA 02226~9 1998-01-09 PROL~U~:l lON OF SECURITY D~T~ ~ ~VING A METAT-T-IC SECURITY
I FEATURE
J Field of the Invention This invention relates to the production of a met~llic security feature on a printed security ~o~l ~ L such as a bank note, which may be based on a synthetic plastic or paper subsLlaLe.
It is known that a reflective surface constituted by, for ~ le, met~ c foil is in a~l~riate Cil~ L~n~e~ an effective counte --~ure ~g~;n~t unauthorised l~l~uction of bank notes or security ~ by means of photo~o~ying, digital scrnning and reprinting, as well as providing a visibly verifiable security feature. The thickness of an applied surface feature of this kind is in the range, generally, from 1 to 100 mi~l~ -Lres. There are stringent requirements for fl~ihility, strength of att~ nt, resistance to abrasion and resistance to chemical agents.
Cu~ L methods of applying met~ security features to bank notes and security paper include: (i) the th~ -1 transfer of a thin layer of metal to the surface by means of a hot foil embossing tape; (ii) the printing of a layer of adhesive followed by lr~in~tion of a met~ layer; (iii) the inco ~l~Lion of a metrlli~e~ foil or thread into the fabric of the bank note during the process of paper production in which the foil or thread is brought to the surface of the paper, i.e. the so-c~lle~ 'windowing process; (iv) the generation of a rel~hle metrllic feature on a cylin~ or flat surface, the met~llic feature being then transferred and adhesively lrmi nrted to the surface of the bank note; and (v) direct vacuum CA 02226~9 1998-o1-os me~A~ Ation of selected regions of the surface of the paper. All these methods require rather ~rPn~ive production ~ L and with the e~Lion of (iii) above, tend to be not well adapted to the speed of processing preferably chArA~teristic of high volume security printing.
Summary of the Invention The present invention is particularly int~nA~ for the production of a metAlli7e~ stripe on security paper, so as to derive a security feature for a bank note or other security do~..e.lL. However, the inv~ntion may be appli~hle to the ~ U~ Lion of more _ _~1~ patterns on paper or other substrates such as plastic cards.
In the application of the invention to the production of a security feature on a paper substrate, the invention cG.,,~Lises two principal stages. The most important of these stages consists of the dry ~dying of a metAll;c mat~r;Al on to the surface of the paper. A variety of te~hniques, such as gas flame ~Ldying, electric arc ~ldying or rlA~ -s~l~ying may be employed, as further explA;n~ hereinafter.
It may he desirable to treat a suhstrate such as paper with a sizing agent before the metal is splay~d~ If the invention is employed during a paper --k;ng process, the trea - L of the paper with a sizing agent need not require an addit;onAl step h~cAll~e the paper may already contA;n a sizing agent.
If a separate stage for a sizing agent were n~c~sAry or desirable, a sizing agent may be Arrl;~ to the paper substrate before the metal is ~.~yed onto the paper substrate.
CA 02226~9 l998-ol-os The metal spraying proA~ a g~n~r~lly porous dull deposit of metal on the paper. It is found howev~l that such a ~ro-~ it, which may be in the form of a stripe or a more _ _le~ pattern, can readily be ~ol~v~lLed to a reflective state by for example crll~hing or hl~rni~hing and accordingly the second principal stage comprises the surface treatment of the ~ldyed metal in a --nn~r which will ~ol~v~lL it to a more specularly reflective state.
The invention is particlllArly suitable in combination with the formation of a relief pattern in the -nn~r of int~glio printing. Such a -nn~r of printing, wherein the formation of the relief pattern is followed by the deposition of ink in the valleys of the pattern, has been known for many years past. The present invention allows for the formation of a relief or surface te~Lule pattern, which may be formed by the use of an intaglio press or another pressure -_hAni~
for the surface treatment of the deposited metal so that a single treatment stage may render the metal reflective and form a relief pattern.
Brief Description of the Drawinqs Figure 1 illustrates in simpli f i e~ fi~h' -tic form a method according to the invention.
Figure 2 illustrates part of a long paper web bearing a ~ dyed stripe.
Figure 3 illustrates in simpli f i ~ form a security do~..ellL
having a security device according to the invention.
CA 02226~9 1998-o1-os ~escription of Preferred Forms of the Invention The inv~n~inn is particularly ~ with the production of a security feature in the form of a stripe composed of r spldy~d metal particles, preferably pro~ e~ by the dry ~ldying of hot particl~ onto the substrate, which may be paper but could be a synthetic plastic, of a security ~_ ~ L.
Al~hollgh metAlli~tion of paper and synthetic plastic substrates int~n~ for security do~l ~ Ls is known, known processes are comparatively exr~n~ive and gen~lly are not well adapted to high speed or large volume manufacture.
A particularly ~uitable form of a method according to the invention is one which produces a long, preferably continuous, stripe along the length of a long web of paper such as typic~lly produced by a paper mill. A bank note printing --hin~ or other high volume security printing ~~hin~ ~ - ly accepts long rolls of paper and prints, in a variety of styles and using a variety of printing techniques, bank notes or other security documents on the roll, typic~lly in multiple rows and ~1 -. Many m~chi n~5 or processes ~LLol.., some pri nt i ng or finishing stages wherein the web is cut up into individual sheets (usually cont~ining an array of partially printed ~ - s) and further printing processes are ~elL~ ~ on the sheets which are, for example, finAlly cut up to provide the individual.do~l - s. It is known to print the docl ~ Ls in at least approximate register with ~long~te stripes, for example in the form of an embedded security thread rlnning lengthwise of the paper web and emhe~ in the web ~ll~i ng the ~-nllf~ture of the paper substrate.
CA 02226559 lgss-ol-os W097/03844 pcT/GB96/ol6ss , . , ,,~ = ., One advantage of the inv~nt; on is that it may employ eql~ L which is well est~hl i ~h~ for the s~laying of metal wo~kri~c~s, with minor ~if;c~tions, in a paper making p ocess which also uses well establi~h~A forms of equipment.
In the scheme shown in Figure 1, a long web of paper is ouL~uL from a supply 2. This could be a paper mill but if the invention is practised at the bank note printing stage, the reference ll~"elal 2 may merely represent a supply system for a web of paper.
The paper web is L~dvel~ed at an a~lo~ iate speed through a metal ~ldying stage 3, wherein a spray gun 4 provides a spray 5 of hot metal partirl~s onto the paper sub~LlaLe.
Thereafter the paper is Lldv~lsed through a trea; - L stage 6, comprising in this example two rollers 7 and 8 of which the ~ul~ose will be described later.
The metal s~ldying may be performed by a ~laying ~-~hln~ in principle s;~il ~r to m~rhin~s ~ullently used for the ~ldying of met~llir ma~e~iAl onto metal w~kpieces.
One ~ aying proce~s which would be suitable is electric arc ~l~ying~ wherein raw me~llir material in the form of a pair of met~ c wires is melted by an electric arc, at~ i~e~ by a cone of c- _ ~assed air, and propell~ towards the wo~kpi~ce. For the ~ul~oses of the present invention, the wires may be in the order of 1 or 2 millimetres in diameter. The method may be performed while the substrate is L dv~lsed relative to the ~ldying e~-i~ L and typically a Lldv~lsing speed of 2 metres per minute is obt~ i n;~hle .
Metal s~ aying e~~ L for this purpose is obtAinAhle, for 1- _le, from Met~ Ation Limited, Dudley, England.
Another form of ~ldying which may be suitable is gas flame s~laying~ wherein raw materiAl in the form of a single wire of cord or even powder is melted in a gas flame, the mat~ri~l being atl i 7-e~ by a cone of c~- _ essed air and propelle~ towards the workri~c~.
A further alternative is plasma ~ldying, wherein a plasma is created by an electric arc within the nozzle of a plAC~-gun and the arc gasses are formed into a plasma jet as it emerges from an An~Aic n~771e. Powder particl~s are injected into the jet where they melt and subsequently strike the surface of the workri~c~. The workpiece can 1. ~ i n cool h~cAll-c- the rl A! - is 1 OcA 1 i 7 - ~ at the gun.
E~lir~Ant suitable for these purposes is obtAinAhle from Me~ ation Limited or from Metco Inc, Westbury, New York State.
Using ordinary commercially avAilAhle metal s~ying e~li_ - L, the rate of at: i7Ation of the raw mat~riAl tends to be rather high so that the width of deposit of mat~riAl on a moving su~sL dLe would typicAlly 50 to 60 illi -Lles if the paper were S~ldyed from a distance of 15 to 25 c~n~i -Lres. It may therefore be pref~r~hle either to reduce the ~i cionS and adjust the o~ldLing conditions of the ~ dying apparatus to produce a na Oh~l stripe, or to use a sacrificial mask. The width of the stripe may be reAll~eA by using ~ -ll~r wire ~i. Lers in an electric arc ~ldying process, lower wire feedrates, and/or by mo~i f ic~tion of dimensions of or pressure in the compressed air nozzle. A mask may be used adjacent to the paper or spaced from it. In the latter case, the stripe of material -CA 02226~9 1998-o1-os Wo 97/03844 PCT/GB96/01659 which is laid down will have a 5lightly irregular or feathered edge. A feathery edge effect is also obtAin;~hle by omitting the use of a mark entirely.
A variety of metals may be employed. It is preferable to employ zinc or an alloy of zinc and tin for the ~ dy~ad metal. Other mat~ ls, such as ;-1 ininm~ might be used although the cohesion of the metal particles deposited on paper is less strong than when zinc or an alloy of zinc and tin is used.
When the inventiorl is employed in a paper -king process, the paper l_ -,ly in~ s a sizing agent which may i ~ ve the adhesion of the hot metal particles to the paper. It is possible to employ the invention without any sizing agent, but if it be necessary to employ a sizing agent, typically polyvinyl or other polymeric matF ~i;~1 which is capable of acting as a adhesive but has a low melting point may be employed. The sizing agent should be activated by the hot metal particlefi that land on it. The met~ ed stripe shows ~x~ 11ent adhesion to the paper surface when a sizing agent of the kind mentioned is used, but in a variety of circumst~n~fi a speci~l sizing agent would not be n~~cary.
The result of the ~-dying stage, as shown in Figure l, is illustrated in Figure 2 wherein 2 denotes the long web of paper and the reLelel,ce 9 denotes a stripe (which may be one of a plurality of st~i ~fi spaced across the width of the paper) ext~n~ing lengthwise of the web l. The stripe proA~ l by the metal ~ldying has a dull, amorphous, p~ance. The width d of the stripe and its marginal irregularity have been greatly exaggerated relative to the width W of the paper web. In typical practice the width d would be of the order of l0 illi -Lles and the width W of the paper would be of the order of l metre.
The stripe may be subjected to surface tre~ L to chAn~
the surface into a more sp~clllArly reflective surface. This may be schieved employing the rollers 7 and 8 as a h~lrni~hing or poli~hing stage, the rolle~ 7 and 8 operating at difLe~l.L speeds.
Alternatively, the rollers 7 and 8 may be con-stituted by an intAgl io printing stage so that at least the stripe and preferably also adjacent reg;o~ of the sub~L-~Le are selectively c~ essed to form an i nt~gl i o or relief pattern. The met~llic stripe thereby may be ~vllv~.Led into adjacent regions of reflective and dull surface within the bol~els of the met~ stripe.
Figure 3 illustrates sch ~-ti~Ally a security do~l ~ L 10 having a paper substrate as previously described, a me~Alli~
stripe 9 c~ _~sed of ~.ay~d metal particles and ~xt~n~ing across the do~..enL, and rendered at least partly reflective, and a~.~-iate lettering 11 and other printing which distinguishes the bank note or security do~l L.
I FEATURE
J Field of the Invention This invention relates to the production of a met~llic security feature on a printed security ~o~l ~ L such as a bank note, which may be based on a synthetic plastic or paper subsLlaLe.
It is known that a reflective surface constituted by, for ~ le, met~ c foil is in a~l~riate Cil~ L~n~e~ an effective counte --~ure ~g~;n~t unauthorised l~l~uction of bank notes or security ~ by means of photo~o~ying, digital scrnning and reprinting, as well as providing a visibly verifiable security feature. The thickness of an applied surface feature of this kind is in the range, generally, from 1 to 100 mi~l~ -Lres. There are stringent requirements for fl~ihility, strength of att~ nt, resistance to abrasion and resistance to chemical agents.
Cu~ L methods of applying met~ security features to bank notes and security paper include: (i) the th~ -1 transfer of a thin layer of metal to the surface by means of a hot foil embossing tape; (ii) the printing of a layer of adhesive followed by lr~in~tion of a met~ layer; (iii) the inco ~l~Lion of a metrlli~e~ foil or thread into the fabric of the bank note during the process of paper production in which the foil or thread is brought to the surface of the paper, i.e. the so-c~lle~ 'windowing process; (iv) the generation of a rel~hle metrllic feature on a cylin~ or flat surface, the met~llic feature being then transferred and adhesively lrmi nrted to the surface of the bank note; and (v) direct vacuum CA 02226~9 1998-o1-os me~A~ Ation of selected regions of the surface of the paper. All these methods require rather ~rPn~ive production ~ L and with the e~Lion of (iii) above, tend to be not well adapted to the speed of processing preferably chArA~teristic of high volume security printing.
Summary of the Invention The present invention is particularly int~nA~ for the production of a metAlli7e~ stripe on security paper, so as to derive a security feature for a bank note or other security do~..e.lL. However, the inv~ntion may be appli~hle to the ~ U~ Lion of more _ _~1~ patterns on paper or other substrates such as plastic cards.
In the application of the invention to the production of a security feature on a paper substrate, the invention cG.,,~Lises two principal stages. The most important of these stages consists of the dry ~dying of a metAll;c mat~r;Al on to the surface of the paper. A variety of te~hniques, such as gas flame ~Ldying, electric arc ~ldying or rlA~ -s~l~ying may be employed, as further explA;n~ hereinafter.
It may he desirable to treat a suhstrate such as paper with a sizing agent before the metal is splay~d~ If the invention is employed during a paper --k;ng process, the trea - L of the paper with a sizing agent need not require an addit;onAl step h~cAll~e the paper may already contA;n a sizing agent.
If a separate stage for a sizing agent were n~c~sAry or desirable, a sizing agent may be Arrl;~ to the paper substrate before the metal is ~.~yed onto the paper substrate.
CA 02226~9 l998-ol-os The metal spraying proA~ a g~n~r~lly porous dull deposit of metal on the paper. It is found howev~l that such a ~ro-~ it, which may be in the form of a stripe or a more _ _le~ pattern, can readily be ~ol~v~lLed to a reflective state by for example crll~hing or hl~rni~hing and accordingly the second principal stage comprises the surface treatment of the ~ldyed metal in a --nn~r which will ~ol~v~lL it to a more specularly reflective state.
The invention is particlllArly suitable in combination with the formation of a relief pattern in the -nn~r of int~glio printing. Such a -nn~r of printing, wherein the formation of the relief pattern is followed by the deposition of ink in the valleys of the pattern, has been known for many years past. The present invention allows for the formation of a relief or surface te~Lule pattern, which may be formed by the use of an intaglio press or another pressure -_hAni~
for the surface treatment of the deposited metal so that a single treatment stage may render the metal reflective and form a relief pattern.
Brief Description of the Drawinqs Figure 1 illustrates in simpli f i e~ fi~h' -tic form a method according to the invention.
Figure 2 illustrates part of a long paper web bearing a ~ dyed stripe.
Figure 3 illustrates in simpli f i ~ form a security do~..ellL
having a security device according to the invention.
CA 02226~9 1998-o1-os ~escription of Preferred Forms of the Invention The inv~n~inn is particularly ~ with the production of a security feature in the form of a stripe composed of r spldy~d metal particles, preferably pro~ e~ by the dry ~ldying of hot particl~ onto the substrate, which may be paper but could be a synthetic plastic, of a security ~_ ~ L.
Al~hollgh metAlli~tion of paper and synthetic plastic substrates int~n~ for security do~l ~ Ls is known, known processes are comparatively exr~n~ive and gen~lly are not well adapted to high speed or large volume manufacture.
A particularly ~uitable form of a method according to the invention is one which produces a long, preferably continuous, stripe along the length of a long web of paper such as typic~lly produced by a paper mill. A bank note printing --hin~ or other high volume security printing ~~hin~ ~ - ly accepts long rolls of paper and prints, in a variety of styles and using a variety of printing techniques, bank notes or other security documents on the roll, typic~lly in multiple rows and ~1 -. Many m~chi n~5 or processes ~LLol.., some pri nt i ng or finishing stages wherein the web is cut up into individual sheets (usually cont~ining an array of partially printed ~ - s) and further printing processes are ~elL~ ~ on the sheets which are, for example, finAlly cut up to provide the individual.do~l - s. It is known to print the docl ~ Ls in at least approximate register with ~long~te stripes, for example in the form of an embedded security thread rlnning lengthwise of the paper web and emhe~ in the web ~ll~i ng the ~-nllf~ture of the paper substrate.
CA 02226559 lgss-ol-os W097/03844 pcT/GB96/ol6ss , . , ,,~ = ., One advantage of the inv~nt; on is that it may employ eql~ L which is well est~hl i ~h~ for the s~laying of metal wo~kri~c~s, with minor ~if;c~tions, in a paper making p ocess which also uses well establi~h~A forms of equipment.
In the scheme shown in Figure 1, a long web of paper is ouL~uL from a supply 2. This could be a paper mill but if the invention is practised at the bank note printing stage, the reference ll~"elal 2 may merely represent a supply system for a web of paper.
The paper web is L~dvel~ed at an a~lo~ iate speed through a metal ~ldying stage 3, wherein a spray gun 4 provides a spray 5 of hot metal partirl~s onto the paper sub~LlaLe.
Thereafter the paper is Lldv~lsed through a trea; - L stage 6, comprising in this example two rollers 7 and 8 of which the ~ul~ose will be described later.
The metal s~ldying may be performed by a ~laying ~-~hln~ in principle s;~il ~r to m~rhin~s ~ullently used for the ~ldying of met~llir ma~e~iAl onto metal w~kpieces.
One ~ aying proce~s which would be suitable is electric arc ~l~ying~ wherein raw me~llir material in the form of a pair of met~ c wires is melted by an electric arc, at~ i~e~ by a cone of c- _ ~assed air, and propell~ towards the wo~kpi~ce. For the ~ul~oses of the present invention, the wires may be in the order of 1 or 2 millimetres in diameter. The method may be performed while the substrate is L dv~lsed relative to the ~ldying e~-i~ L and typically a Lldv~lsing speed of 2 metres per minute is obt~ i n;~hle .
Metal s~ aying e~~ L for this purpose is obtAinAhle, for 1- _le, from Met~ Ation Limited, Dudley, England.
Another form of ~ldying which may be suitable is gas flame s~laying~ wherein raw materiAl in the form of a single wire of cord or even powder is melted in a gas flame, the mat~ri~l being atl i 7-e~ by a cone of c~- _ essed air and propelle~ towards the workri~c~.
A further alternative is plasma ~ldying, wherein a plasma is created by an electric arc within the nozzle of a plAC~-gun and the arc gasses are formed into a plasma jet as it emerges from an An~Aic n~771e. Powder particl~s are injected into the jet where they melt and subsequently strike the surface of the workri~c~. The workpiece can 1. ~ i n cool h~cAll-c- the rl A! - is 1 OcA 1 i 7 - ~ at the gun.
E~lir~Ant suitable for these purposes is obtAinAhle from Me~ ation Limited or from Metco Inc, Westbury, New York State.
Using ordinary commercially avAilAhle metal s~ying e~li_ - L, the rate of at: i7Ation of the raw mat~riAl tends to be rather high so that the width of deposit of mat~riAl on a moving su~sL dLe would typicAlly 50 to 60 illi -Lles if the paper were S~ldyed from a distance of 15 to 25 c~n~i -Lres. It may therefore be pref~r~hle either to reduce the ~i cionS and adjust the o~ldLing conditions of the ~ dying apparatus to produce a na Oh~l stripe, or to use a sacrificial mask. The width of the stripe may be reAll~eA by using ~ -ll~r wire ~i. Lers in an electric arc ~ldying process, lower wire feedrates, and/or by mo~i f ic~tion of dimensions of or pressure in the compressed air nozzle. A mask may be used adjacent to the paper or spaced from it. In the latter case, the stripe of material -CA 02226~9 1998-o1-os Wo 97/03844 PCT/GB96/01659 which is laid down will have a 5lightly irregular or feathered edge. A feathery edge effect is also obtAin;~hle by omitting the use of a mark entirely.
A variety of metals may be employed. It is preferable to employ zinc or an alloy of zinc and tin for the ~ dy~ad metal. Other mat~ ls, such as ;-1 ininm~ might be used although the cohesion of the metal particles deposited on paper is less strong than when zinc or an alloy of zinc and tin is used.
When the inventiorl is employed in a paper -king process, the paper l_ -,ly in~ s a sizing agent which may i ~ ve the adhesion of the hot metal particles to the paper. It is possible to employ the invention without any sizing agent, but if it be necessary to employ a sizing agent, typically polyvinyl or other polymeric matF ~i;~1 which is capable of acting as a adhesive but has a low melting point may be employed. The sizing agent should be activated by the hot metal particlefi that land on it. The met~ ed stripe shows ~x~ 11ent adhesion to the paper surface when a sizing agent of the kind mentioned is used, but in a variety of circumst~n~fi a speci~l sizing agent would not be n~~cary.
The result of the ~-dying stage, as shown in Figure l, is illustrated in Figure 2 wherein 2 denotes the long web of paper and the reLelel,ce 9 denotes a stripe (which may be one of a plurality of st~i ~fi spaced across the width of the paper) ext~n~ing lengthwise of the web l. The stripe proA~ l by the metal ~ldying has a dull, amorphous, p~ance. The width d of the stripe and its marginal irregularity have been greatly exaggerated relative to the width W of the paper web. In typical practice the width d would be of the order of l0 illi -Lles and the width W of the paper would be of the order of l metre.
The stripe may be subjected to surface tre~ L to chAn~
the surface into a more sp~clllArly reflective surface. This may be schieved employing the rollers 7 and 8 as a h~lrni~hing or poli~hing stage, the rolle~ 7 and 8 operating at difLe~l.L speeds.
Alternatively, the rollers 7 and 8 may be con-stituted by an intAgl io printing stage so that at least the stripe and preferably also adjacent reg;o~ of the sub~L-~Le are selectively c~ essed to form an i nt~gl i o or relief pattern. The met~llic stripe thereby may be ~vllv~.Led into adjacent regions of reflective and dull surface within the bol~els of the met~ stripe.
Figure 3 illustrates sch ~-ti~Ally a security do~l ~ L 10 having a paper substrate as previously described, a me~Alli~
stripe 9 c~ _~sed of ~.ay~d metal particles and ~xt~n~ing across the do~..enL, and rendered at least partly reflective, and a~.~-iate lettering 11 and other printing which distinguishes the bank note or security do~l L.
Claims (12)
1. A method of making a reflective security feature on a substrate intended for a security document, comprising the steps of:
spraying metal particles on to the surface of the substrate, whereby to produce an extensive region of sprayed metal on the surface of the substrate; and treating the the sprayed metal to convert it to a partly specularly reflective surface.
spraying metal particles on to the surface of the substrate, whereby to produce an extensive region of sprayed metal on the surface of the substrate; and treating the the sprayed metal to convert it to a partly specularly reflective surface.
2. A method according to claim 1 wherein the spraying is performed by gas, plasma or electric arc spraying.
3. A method according to claim 1 or claim 2 wherein the metal is sprayed through a mask is interposed between the spray and the substrate.
4. A method according to any foregoing claim wherein the region of application of the sprayed metal is varied to produce a stripe of sprayed metal.
5. A method according to any foregoing claim wherein the treating step comprises forming a relief pattern by the selective compression of the region of sprayed metal.
6. A method according to claim 5 wherein the treating step comprises subjecting the region to compression in the manner of intaglio pressing.
7. A method according to any of claims 1 to 4 wherein the treating step comprises burnishing said region.
8. A substrate (2) intended for use as a security document, bearing on a surface of the substrate a security feature constituted by a region (9) of sprayed metal rendered at least partly specularly reflective.
9. A substrate according to claim 8 wherein the region (9) has at least one feathery or irregularly evanescent edge.
10. A substrate according to claim 8 or claim 9 wherein the said region is formed into a relief pattern.
11. A security document (10) carrying on the surface of a substrate of the document a security device (9) comprising a region of sprayed metal rendered at least partly specularly reflective.
12. A security document according to claim 11 wherein the region is formed into a relief pattern.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9514654.4A GB9514654D0 (en) | 1995-07-18 | 1995-07-18 | Production of security document having a metallic security feature |
| GB9514654.4 | 1995-07-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2226559A1 true CA2226559A1 (en) | 1997-02-06 |
Family
ID=10777829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002226559A Abandoned CA2226559A1 (en) | 1995-07-18 | 1996-07-12 | Production of security document having a metallic security feature |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0839097B1 (en) |
| AT (1) | ATE179934T1 (en) |
| AU (1) | AU6463996A (en) |
| CA (1) | CA2226559A1 (en) |
| DE (1) | DE69602446D1 (en) |
| GB (1) | GB9514654D0 (en) |
| WO (1) | WO1997003844A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2780914A1 (en) * | 1998-07-10 | 2000-01-14 | Breger Emballages Sa | METHOD FOR MANUFACTURING LABELS |
| FR2780915B1 (en) * | 1998-07-10 | 2000-09-15 | Breger Emballages Sa | METHOD FOR MANUFACTURING LABELS |
| GB0005857D0 (en) * | 2000-03-10 | 2000-05-03 | Rue De Int Ltd | Security device |
| GB2400860A (en) * | 2003-04-24 | 2004-10-27 | Gcc Man Ltd | Developer sleeve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2840724B2 (en) * | 1989-07-21 | 1998-12-24 | 大蔵省印刷局長 | Method for creating watermark pattern having iris color and its product |
| DE4002979A1 (en) * | 1990-02-01 | 1991-08-08 | Gao Ges Automation Org | Banknote with optically variable security elements - are transformed and pressed onto smooth surface to form hologram or relief pattern |
| DE4344552A1 (en) * | 1993-12-24 | 1995-06-29 | Giesecke & Devrient Gmbh | Method and device for equipping securities with authenticity features |
-
1995
- 1995-07-18 GB GBGB9514654.4A patent/GB9514654D0/en active Pending
-
1996
- 1996-07-12 CA CA002226559A patent/CA2226559A1/en not_active Abandoned
- 1996-07-12 AU AU64639/96A patent/AU6463996A/en not_active Abandoned
- 1996-07-12 DE DE69602446T patent/DE69602446D1/en not_active Expired - Lifetime
- 1996-07-12 AT AT96924055T patent/ATE179934T1/en not_active IP Right Cessation
- 1996-07-12 EP EP96924055A patent/EP0839097B1/en not_active Expired - Lifetime
- 1996-07-12 WO PCT/GB1996/001659 patent/WO1997003844A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| AU6463996A (en) | 1997-02-18 |
| GB9514654D0 (en) | 1995-09-13 |
| EP0839097A1 (en) | 1998-05-06 |
| DE69602446D1 (en) | 1999-06-17 |
| ATE179934T1 (en) | 1999-05-15 |
| EP0839097B1 (en) | 1999-05-12 |
| WO1997003844A1 (en) | 1997-02-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |