CN1737825A

CN1737825A - Optically variable tamper evident device

Info

Publication number: CN1737825A
Application number: CN 200510064288
Authority: CN
Inventors: 马克O·伍恩顿纳
Original assignee: Illinois Tool Works Inc
Current assignee: Illinois Tool Works Inc
Priority date: 2004-04-13
Filing date: 2005-04-12
Publication date: 2006-02-22

Abstract

A tamper evident system and method provides a clear cover for information on an object to be retained as secure. The cover has an optically variable image therein within at least two regions on opposite sides of a line along which the cover is separated or separable upon lifting the cover or a part thereof from the object. If one or both regions are lifted, characteristics of the image are altered to allow detection of tampering.

Description

Optically variable tamper evident device

Technical field

Say that generally the present invention relates to altering of plastics and paper card or other certificate differentiates the surface protection system; wherein in order to make data security on the certificate reliable and protect it to exempt from surface abrasion, imitation and/or change and need the surface be protected, more specifically to the identification system of altering that adopts holography or light-induced variable image and/or pattern.

Background technology

Knownly protect printing data, photo and other data on plastics or paper card, passport and other type safety or the document surface to exempt from usually because of handling and using the normal wear that causes and tear with transparent plastic bag, sticking patch, laminate or strip of paper used for sealing.Polyester on the document surface or other plastic sheeting cap rock stop contained information on the change certificate, thereby provide safeguard protection to a certain degree to information.

It is known by heating and pressurization this class clear polymer or other plastic foil sticking patch or laminate being attached on card or the document surface.But this overlayer can be taken it off by the zone of heating compressing tablet and remove from document surface.In case polyester or other plastic foil are removed the information of just being not difficult to change or copying on the certificate being comprised.It is new to add one deck after having changed the information on the certificate, and blank clear polymer overlayer makes the certificate of having changed have original outward appearance.

For security to a certain degree, a known part of utilizing holography or light-induced variable image or pattern as sticking patch or surface coating are provided to the certificate that polyester or other plastic foil sticking patch are arranged.This safe sticking patch comprises that embossment for good and all is attached to the light-induced variable in each sticking patch downside coating, the machine drawing picture and/or the pattern of holography or diffraction in thermoplastic material itself or in manufacturing process.After image or pattern are created on the sticking patch by embossment, casting or other method, in manufacturing process, the hot activation cementing agent is coated onto on the sticking patch.Though this sticking patch also can be removed,, if substitute with transparent sticking patch, it will become the discriminating that certificate has been modified so, because the light-induced variable image no longer appears on the overlayer of certificate.Because generate the complicacy of needed machine work of light-induced variable image and technology and cost an arm and a leg and with duplicate the light-induced variable image, as hologram image etc., relevant degree of difficulty height, so, have the certificate of simple transparent polyester sticking patch to compare with forgery or change, the situation of forging and/or change this certificate reduces.But, along with the development of new technology and certificate and on comprise the increase of the intrinsic value of information, still need and be desirable to provide the more effective and improved identification system of altering, with forge in attempt or alter those people of these certificates before do sth. before others have a chance to the improvement technology.

Also having known has other to alter identification system, as, for example " breakaway " overlayer, invisible impressing pattern or the safe impressing pattern blank or that can see with somewhat expensive UV (ultraviolet ray), IR (infrared ray) or the safe impressing pattern of other hidden seal agent technology.These known systems have the other problem that relates to cladding material.Different coating is inconsistent in manufacturing process and is difficult to control.The breakaway principles of chemistry stop that sticking patch pastes card that the common seal agent of easy usefulness, overlayer even other duplicate chemistry duplicate or certificate or printing or altering of silk screen printing differentiated on the detail section.Therefore, the physically stable that still needs to develop new, reasonable price and high safety is altered identification system.

Summary of the invention

The invention provides a kind of be printed on it or be added with other transfer method security document object alter identification system, this system includes the film of light-induced variable image or hologram, if this image is altered, this film can make image change and can be found when scrutiny.

In one aspect of the invention, the invention provides a kind of be used to protect as the information on plastics or the paper substrate alter the discriminating sticking patch, have one deck can be attached to on-chip film on the sticking patch surface.Film sticking patch or laminate have mutual vicinity but the presumptive area of being separated by other separatrix between cross cutting, perforation, narrow slit or the zone.These zones are along the separatrix separately or discerptible.Light-induced variable image or hologram are by embossment, casting or be arranged in the specific region of film with other method and make it overlapping with this separatrix or many separatrix.Image or pattern have enough careful light-induced variable or holographic detail section, therefore can according at least one zone of specific region with demonstrate change separating of substrate.

In another aspect of this invention, the invention provides a kind of have a substrate alter the discriminating object, this substrate has on the surface that will protect and the substrate surface thin film is arranged.Be combined in light-induced variable image on the film or pattern have some appointments in some specific regions of film zonule, if film is removed in attempt, then the separatrix between the zone can separate these zones along the separatrix.Having in the image is enough to change between the viewing area when at least one and substrate separation in the zone or the careful details of dislocation.

, the invention provides a kind of making and alter the method for differentiating object aspect another of the present invention, this object is just like the substrate of certificate card or passport, layout, transfer arranged on the substrate or print thereon information.This method may further comprise the steps: thin film is provided, can easily reads or detect on-chip information by this film; On film, generate the light-induced variable image, as hologram; Film is attached on the surface; Along attenuating weak by the separatrix of image and cutting substrate to define the zone of separatrix opposition side in the film.

In another aspect of this invention, the invention provides a kind of method that certificate may be altered that detects.Thin film is arranged on the certificate, and a light-induced variable image is arranged in the film.This method comprises the zones of different and at least one separatrix that is separated from each other by image, with these zones of location light-induced variable image; The detail section of assessment separatrix opposition side image; The define boundaries variation of opposition side image, the situation of for example aliging once was modified or removed determining whether.

An advantage of the invention is provides a kind of identification system of altering, and this system has improved security under the condition that cost increases a little, makes its security surpass known system.

Another advantage of the present invention provided a kind of improvement that can combine with existing technological process alter identification system.

Another advantage of the present invention has provided a kind of identification system of altering cheaply, efficiently and reliably.

After having checked following detailed description, claims and accompanying drawing, for a person skilled in the art, other characteristics of the present invention and advantage will become conspicuous, the identical identical characteristic details of labelled notation in the accompanying drawing.

Description of drawings

Fig. 1 is a skeleton view of altering the supply roll of differentiating sticking patch according to of the present invention;

Fig. 2 will alter by heating and/or pressurization to differentiate that sticking patch is attached to certificate or object, the synoptic diagram of the technological process on paper or the plastics;

Fig. 3 has according to the certificate of discriminating sticking patch or the skeleton view of object altered of the present invention;

Fig. 4 is that expression sticking patch some part is altered the skeleton view of differentiating certificate or object when being removed;

Fig. 5 is the skeleton view that is similar to Fig. 4, partly is removed but different sticking patch is shown;

Fig. 6 is a planimetric map, and it illustrates an amplifier section and the expression of sticking patch and differentiates the method for altering.

Should be understood that before elaborating embodiments of the invention application of the present invention is not limited to detailed structure listed in following explanation or the description of drawings and layout.The present invention can have other embodiment, as, but be not limited to clear label or laminated film to pressure sensitive, and available various different modes implements to realize in other words the present invention.In addition, should be understood that used phrase and term just should not be considered as restriction for explanation.Used " comprising ", " comprising " and variation thereof are meant object and equivalent thereof, condiment and the equivalent thereof that comprises that the back is cited.

Embodiment

Now more specifically with reference to the accompanying drawings, Fig. 1 particularly, label 10 expressions are according to the discriminating sticking patch of altering of the present invention.Fig. 1 is depicted as convenient the use and as the many single sticking patch 10 of a part of 12 in flakes on the reel 14, this point will be done more detailed description below.Certificate or object 16 (Fig. 3) comprise that being attached to substrate 18 lip-deep altering differentiates sticking patch 10, has the information that will protect on the substrate 18.

As shown in Figure 3, object 16 is credit card, certificate card, licence, passport or secret is arranged on it or is other similar certificate of important information or data at least that their security and integrality are important.Though illustrated is card, should be understood that object 16 can be the certificate of other types, and of the present invention altering differentiates that sticking patch 10 can be used for protecting the information on this certificate, thereby make it safety.Alter and differentiate that sticking patch 10 is attached on the substrate 18, so alter or changed information need be removed all or part of of sticking patch 10.According to the present invention, as the discriminating of the information on the object 16 that may be altered, the removal of sticking patch 10 or its part is can be detected.

Sticking patch 10 is films of polyester or other transparent material, can see information on the substrate 18 by this film.Image 20 with light-induced variable, holography or diffracting mechanism image property is permanently by nourish sheet 10 or be fixed on the sticking patch 10 with other method of embossment, casting.Just as the skilled personnel to understand, image 20 can by embossment or casting be formed in the film or any other thermoplastic overlayer on the film or on the sticking patch 10 in or on it.This overlayer comprises, for example, adhesive accelerant, colour or light color coating have the embossed layer of high index of refraction coating.Final coating is coated after being preferably in and generating image 20, and can comprise, for example, and one deck bottom or articulamentum and sticking patch 10 adhered to the cementing agent to heat or pressure sensitive on the substrate 18.Skilled in the art will recognize that on sticking patch 10 method that generates these images, thereby no longer do here and be described in more detail.

Image 20 is expressed as many lines in the accompanying drawings, but also can be that look becomes (color shifting) or the form of diffraction pattern or the image of picture or other appropriate identification form, as seal and the sign that generates with holography or light-induced variable technology, grid or the design of any pattern.For example, known as legal government certificates such as driver's licenses is to provide with the hologram with legal national seal, country map or other true identity of discerning easily.But known certificate card, credit card etc. comprise holography or the light-induced variable image with identification marking language etc.Though 20 of illustrated images appear on the several portions of sticking patch 10, image 20 also can appear on the zonule of one or more separation of whole sticking patch 10 or sticking patch 10.

As shown in the figure, sticking patch 10 has two or more zones of being defined 22,24,26, three described regional 22,24,26 shown in the drawings.Should be understood that sticking patch 10 of the present invention can have two, three or more zones, this can decide according to concrete application and use of the

present invention.Zone

22,24,26 is defined by

separatrix

28,30 each other.In the exemplary embodiment of accompanying drawing, separatrix 28 one side 30 be the straight line that extends to sticking patch 10 relative edges from sticking patch 10 basically, be used for defining and have equal length but the essentially

rectangular zone

22,24,26 of different in width.Sticking patch 10 has only two zones in another embodiment, thereby only needs a separatrix.In the embodiment that zone more than three is arranged, may need the separatrix more than two.Will be further appreciated that not necessarily straight line of

separatrix

28,30, also can be curve, serrate or other shape.In addition, each zone not necessarily will be across whole sticking patch 10.For example, zone can be to be in circle in the middle of other zone and to separate with another zone, or a square or other shapes in other zone.

Separatrix 28,30th, making in the sticking patch 10 are respectively distinguished 22,24,26 and are separated or discerptible some figures, and therefore,

separatrix

28,30 can be if take the perforation line form that sticking patch 10 separatrix will be torn fully off from substrate 18.The separatrix 28,30th in other embodiments, pass the line of weakness that is used for determining sticking patch 10 weakness zones in true (physics) otch of sticking patch 10 or sticking patch 10 thickness.If want to take sticking patch 10 off from substrate 18, these separatrix also can be torn or be separated.Also can consider the

separatrix

28,30 of other structure.Specializing of all

separatrix

28,30 all dots in the accompanying drawings.Separatrix 28,30th, such, if whole sticking patch 10 or part sticking patch 10 are taken off, so at

adjacent area

22,24, between 26 tangible separation will take place.

For substantially

parallel zone

22,24,26, as shown in Figure 4, if in the

zone

22 or 26 of regional 24 two opposite sides one or two taken off from substrate 18, so at adjacent area 22, tangible separation just takes place between 24,26, be out of shape or tear.Therefore, if zone 22 is taken off from

substrate

18,28 tangible separation will take place along the separatrix so between zone 22 and 24.Equally, if zone 26 is taken off from

substrate

18,30 tangible separation will take place along the separatrix so between zone 26 and 24.As shown in Figure 5,, will take place so similarly to separate, promptly between

zone

22 and 24, will be between 24 and 26 28,30 separate along the separatrix if only zone 24 is put from substrate 18.

One or two in the

separatrix

28,30 is crossed in image 20 extensions, zonule 20a is arranged, 20b and 20c respectively in the

zone

22,24 and 26 in the embodiment shown.Image 20 comprises the careful details figure that is enough to show light-induced variable or holographic characteristic, therefore, if with sticking patch 10 separately, altered, will cause the distortion or the dislocation of separatrix two opposite sides image so along the physical separation of one or two in

separatrix

28 and 30 from substrate 18.

The material of sticking patch 10 can expand and can shrink when cooling off during general heating.Therefore, when heating with softening cementing agent to it, in heating process, can expand and can shrink when cooling off in order to remove a part or whole sticking patch 10.But, expand and depend on the size of the relevant sheet that is inflated or shrinks with the amount of shrinking.For the

zone

22,24,26 of different size and/or shape, the expansion of zones of different is different with contraction.In addition, the operation in

zone

22,24,26 and processing can cause the multi-form stretching of material, and concrete pulled out condition depends on the size and dimension in

zone

22,24 and 26.

The structure of image 20 and layout are such, when the part of 28 or 30 images when take place separating along the separatrix one of keeps in the

zone

22,24,26 with sticking patch 10 together, and another part of image 20 keep with

adjacent area

22,24 or 26 together.When attempting to put back to

zone

22,24 and 26 together again, some part of image or pattern can not be alignd because of the extension of zones of different is different with shrinkage factor.Therefore, examiner investigator in other words mostly can be by the vision multiplying arrangement, as, the zonule 20a of magnifier 32 (Fig. 6) positioning image 20 for example, the

separatrix

28 and 30 between these zonules of 20b and 20c and image.Examiner assessment and relatively some details of

separatrix

28,30 opposition sides so that judge whether to be modified and/or to forge according to dislocation or other deformation of line in the image 20 and pattern.Fig. 6 illustrates the deformation pattern of representing with a series of intermittent line 34.If finding out has certain mistake in the image, just this card or certificate can be decided to be invalid, suspicious or Withdrawl or refuse its legal use alternatively.

In sticking on a kind of method of sticking patch 10, provide one deck to generate the membraneous material of image 20 thereon.Film 10 usefulness laminations or pressure activation technology 40 are attached on the substrate 18, and as shown in Figure 2, wherein 12 reel 14 provides sticking patch 10 by having in flakes on it.Before on substrate 18, pasting film 10, preferably information or data are printed or is arranged on the substrate 18 with other method.12 can be the continuous length film of making a plurality of sticking patch 10 in flakes, also can be a carrier in flakes, this is held in flakes and a plurality ofly suitably separates and delivered so that adhere to single sticking patch 10 on each substrate 18.Sticking patch 10 is attached on the substrate 18 by heat and the pressure from laminating roll 42, if what use is cementing agent to pressure sensitive, then can only paste on the substrate 18 with pressure.Be preferably in sticking patch 10 be attached on the substrate 18 before but at hologram or light-induced variable image by embossment, casting or be fixed in the sticking patch 10 with other method and after last cementing agent is added on the sticking patch 10,

generation separatrix

28,30 in sticking patch 10.Separatrix 28,30 be preferably in the production run of sticking patch 10 or after lamination by cross cutting, methods such as runner cutting are made, as among Fig. 2 with shown in digital 44 arrows of representing.In another different configuration, a certain distance in laminating roll 42 downstreams apart from laminating roll 42 is made separatrix 28,30.If in lamination process, heated object 16, to after object 16 coolings, make the separatrix more so.Image 20 shape that remains unchanged is because whole sticking patch 10 is to be to do as a whole heating and cooling together before forming

separatrix

28,30 in lamination process or in another different configurations.In a kind of configuration, if use cementing agent that sticking patch 10 is bonded on the substrate 18, then need not heat, thereby local online 44 places that can be arranged in more close laminating roll 42 generate

separatrix

28,30 pressure sensitive.Can take turns 46 places in terminal and collect in flakes 12 or its remainder.

According to one aspect of the present invention,, can make fully in the mode of cutting between the

adjacent area

22,24 and 26 so and separate if

separatrix

28,30 is formed on the suitable place of substrate 18 with sticking patch 10.Perhaps, sticking patch 10 can be along the

separatrix

28,30 by as perforation or delineation do enough weakly, make

zone

22,24,26 all can cause

adjacent area

22,24, the physical separation between 26 with respect to any moving slightly in another

adjacent zone

22,24,26.

To the change of foregoing with revise all within the scope of the invention.Should be understood that here the present invention open and that define is extended to above-mentioned or is tangible all various combinations of two or more indivedual details according to text and/or accompanying drawing.All these various combinations constitute variant aspect of the present invention.Illustrated embodiment has set forth and has implemented known optimal mode of the present invention and make those skilled in the art can utilize the present invention.Following claims are understood to include all the different embodiment in the prior art allowed band.

Various characteristics of the present invention in claims of back, have been listed.

Claims

1, a kind of be used to protect information on the substrate alter the discriminating sticking patch, described sticking patch comprises:

Be attached to described on-chip thin film, described film has first and second zones of mutual vicinity, and described first and second zones are a marginal opposition side between described two zones, and described two zones are separated from each other or can separate along described separatrix;

Light-induced variable image on described film, a described image part is positioned at described first area, another part is positioned at described second area, and described image can demonstrate variation when enough careful detail section is arranged with at least one zone in described first and second zones of box lunch and described substrate separation.

2, the discriminating sticking patch of altering as claimed in claim 1, described separatrix is some perforation that described first and second zones are separated from each other.

3, the discriminating sticking patch of altering as claimed in claim 1, described separatrix is the logical otch in the described film.

4, the discriminating sticking patch of altering as claimed in claim 1, described separatrix is the weakness zone between the described zone.

5, the discriminating sticking patch of altering as claimed in claim 4, described separatrix are line of weakness in the described film.

6, the discriminating sticking patch of altering as claimed in claim 1, there are different size and shape in described each zone.

7, a kind of altering differentiates that object comprises:

The substrate that the surface that will protect is arranged;

Described lip-deep thin film;

Light-induced variable image on described film;

First and second zonules of the described image in described film first and second zones;

A separatrix between described first and second zones, described two zones are to be separated from each other along the separatrix or discerptible; With

Described image has enough careful detail section, can demonstrate the variation between the described zone during with at least one zone in described first and second zones of box lunch and substrate separation.

8, the discriminating object of altering as claimed in claim 7, described separatrix are to be used for perforation that described first and second zones are separated from each other.

9, the discriminating object of altering as claimed in claim 7, described separatrix is the logical otch in the described film.

10, the discriminating object of altering as claimed in claim 7, described separatrix is the weakness zone between the described zone.

11, the discriminating object of altering as claimed in claim 10, described separatrix is the line of weakness in the described film.

12, the discriminating object of altering as claimed in claim 7, there are different size and shape in described each zone.

13, the discriminating object of altering as claimed in claim 7, described film have one the 3rd zone and one second described separatrix, and described image.

14, the discriminating object of altering as claimed in claim 7, described separatrix is a straight line.

15, the method for differentiating object is altered in a kind of making, and this object has a substrate, and information is arranged on the substrate, said method comprising the steps of:

Thin film is provided, can detects on-chip information by this film;

On film, generate a light-induced variable image;

Film is attached on the surface; With

Along attenuate weak substrate or cutting substrate by the separatrix of image, with first and second zones in the film that defines the separatrix opposition side.

16, method as claimed in claim 15 comprises along doing perforation by the separatrix of image to substrate.

17, method as claimed in claim 15 comprises along the separatrix cutting substrate by image.

18, method as claimed in claim 15 comprises along delineating substrate with a little less than substrate is attenuated by the separatrix of image.

19, a little less than method as claimed in claim 15 comprises that the edge is attenuated substrate by the separatrix of image.

20, a kind ofly detect the method that certificate may be altered, film is arranged on the certificate, the light-induced variable image is arranged in the film, this method comprises:

First and second zonules of location light-induced variable image and by image and a separatrix that first and second zonules are separated from each other;

The characteristics of image of assessment separatrix opposition side;

The image change of opposition side defines boundaries.