EP1533406A1 - Method for producing a fabric and inspection method for verifying the authenticity of the fabric - Google Patents

Abstract

In a ground structure (3) of the fabric (2) a given pattern (4) is woven. This is taken as an identification confirming authenticity. At the loom, sley force is controlled in accordance with a given scheme or pattern. A pattern is obtained by variation in weft- and/or warp tension, in accordance with a given scheme. Further variables exploited in this way, include the angle of shed opening, width control and incorporation of differing wefts (5) or warps (6). A serial number is woven-in. The pattern (4) is woven such that its special character is undetectable to the naked eye, when unassisted by technical measurement equipment (7). The testing method forms a reference digital data set which undergoes single- or multidimensional transformation, e.g. using fast Fourier transformation. The loom may have its own weaving fingerprint, which is detected in this way. Optical equipment is used for measurement. Independent claims are included for the corresponding fabric and testing method.

Description

The invention relates to a method for producing a tissue, as well as a Test method for testing the authenticity of the fabric in accordance with Generic term of the independent claim of the respective category.

In particular branded products are usually with a brand label which gives the consumer the origin and authenticity of the product To document the product. But these brand labels are becoming commonplace falsified, which often causes considerable damage to the brand manufacturer arises. This problem is in particular in textile products, such as Garments but also with other woven products such as tarpaulins for Tents, or for example in safety belts for the automotive or Aerospace industry and many other areas where woven Materials find use, widely used. But also other, non-textile Products are often woven for a variety of reasons Label provided, glued, sewn or in another suitable Is attached to the product for identification. The production of a tamper-proof feature for a tissue, as well as the inseparable linked problem of testing for authenticity of a fabric, for example, a woven registered or unregistered Trademark or brand labels attached to a particular product can be attached or directly into the fabric of a product can be incorporated, is still largely unresolved, at least insufficiently solved problem. In particular, for a counterfeiter one known from the prior art identification feature, such as a Brand label, usually easy to copy this, so it from the corresponding real brand label is indistinguishable. Of the One of the reasons for this is that the well-known brand labels are indeed often have distinctive, optically visible peculiarities that not only easily recognizable, but also easily copied accordingly.

A problem that can not be separated from this is the reliable verification of the Authenticity of such an identification feature. As with the known woven brand labels set to simple visual identification features These are easily identifiable by the counterfeiter and thus easy copied.

The object of the invention is therefore to provide a novel process for the production a fabric with a tamper-proof identification feature to propose, as well as a corresponding procedure for the reliable and simple verification of the authenticity of a method manufactured by the method To provide tissue.

The problem solving methods are characterized by the features of independent claims 1 and 12.

The respective dependent claims relate to particular advantageous embodiments of the invention.

Thus, according to the invention, a method for producing a fabric is disclosed proposed, wherein in a basic structure of the tissue a predetermined Woven pattern, which is used as an identifying feature for testing the Authenticity of the tissue is used, as well as a test method, with which the authenticity of the inventive method produced fabric is verifiable.

The inventive method and the test method thus solve in Combining the task asked.

It is a significant advantage of the inventive method, that woven into the basic structure of the fabric which as Identification feature used to check the authenticity of the tissue becomes virtually unknowable without knowing the specific web process is reproducible. The basic structure of the fabric is namely through various control measures of the weaving machine in the weaving process imprinted quite characteristic pattern, leaving the tissue as a reference can be used to with the aid of the inventive Test method, which will be explained in detail later, the authenticity of a possibly fake test tissue by comparison with the reference can be examined.

The pattern may be a regular structure, such as a geometric pattern or even a woven serial number or similar, or another woven identifier. The pattern is preferred no regular structure, but can for example generated by it be that in the control of the loom in the weaving process certain Parameters, for example control parameters in a computer program to control the loom, set more or less arbitrarily be so that the pattern has no regular structure but rather stochastic character. This will clear the pattern Application of the inventive method quasi with a "Fingerprint" provided without knowing the special parameters for Control of the weaving machine when weaving the pattern practically not is reproducible, so that only by using the inventive Test method, a test fabric that may be a fake of the Fabric is verifiable on authenticity.

To weave the pattern into the basic structure of the fabric is offered many different possibilities, of which below are some special ones and preferred embodiments are discussed, the enumeration in no way be considered conclusive.

Thus, the pattern in the basic structure of the fabric can be characterized, for example be generated by controlling the strength of the attack of the Batten of a weaving machine the pattern according to a predetermined scheme is woven. That is, the strength with which the batten one Weft strikes can be varied according to a predetermined scheme so that the fabric is a pattern with a characteristic structure which is not reproducible if the given scheme for Control of the strength of the attack in the web process is not known.

In another embodiment of the inventive method becomes the weft tension and / or the warp tension after a given scheme varies in the web process.

Another beneficial measure can be the change of one Opening angle in the shedding according to a predetermined scheme.

Also a suitable control of a Breithalters the loom after a given scheme may in the context of the inventive Method advantageous for weaving a predetermined pattern in the Basic structure of the tissue can be used.

In addition to the measures exemplified above for controlling a Weaving machine according to a given scheme can also, alternatively or at the same time, the pattern through the use of different Weft threads and / or different warp threads is generated. there For example, weft threads and / or warp threads can be made from different ones Materials are used according to a given scheme Weaving the fabric to be woven. The weft threads and / or warp threads can also have different thicknesses, different Have surface finishes or in other properties which are used to generate the predetermined pattern in the Basic structure of the tissue are suitable.

In a particularly relevant for the practice variant of inventive method, the pattern is woven in such a way that it without a technical measuring device can not be detected by eye. This means that the pattern forms a kind of substructure in the basic structure of the tissue, so that the pattern in the tissue with the naked eye, the means without optical aids, is not recognizable.

It is understood that the previously exemplified embodiments can also be advantageously combined in any way.

Furthermore, the invention also relates to the tissue that after the inventive method, for example according to one of the above described embodiments of the method, is produced. The Fabric thus includes a basic structure in which a specifiable pattern woven as an indentifying feature to test the authenticity of the product Tissue is suitable. Preference is given to the pattern without technical Measuring device in the tissue with the eye not visible.

In a particularly important embodiment for the practice is the fabric is a registered or unregistered brand label, the for example, incorporated in a woven product, or as a sticker, Badge, or as a brand label attached to sew on a product is to demonstrate the authenticity of the product. It can do that Brand label of course in any other way on the Be attached product and the product itself does not need a woven It can be product but it can be any product with one woven brand label trade.

To practice a fake tissue, from a real tissue that has been prepared according to the inventive method, to differentiate can, will continue a test procedure to test the authenticity of a Test tissue by comparison with a tissue with a predeterminable Sample in a basic structure proposed in which test method the Test fabric detected metrologically with a technical measuring device, and used to create an at least one-dimensional digital test data set which is representative of the test tissue. The digital check record is by a one- or multi-dimensional transformation into a second Test data set transformed to test the authenticity of the test fabric the tissue is used as a reference, the tissue metrologically is captured, and from this an at least one-dimensional digital Reference data set that is representative of the tissue. Of the digital reference data set is characterized by a one- or multi-dimensional Transform transformed into a second reference data set, so that by comparing the second test data set with the second Reference data set the authenticity of the tissue is checked.

That is, both the test fabric, which examines its authenticity is to be, as well as the woven according to the inventive method Tissue, is detected by measurement, for example, with an optical Scanner, camera or other suitable metrological Device, allowing a digital test record of the test tissue and a corresponding reference data set of the tissue can be created. The means, the data sets are in the mathematical space of the tissue created and can be used in a suitable coordinate system Place space can also be displayed. The aforementioned records are then loaded, for example, in a suitable data processing system and in each of these is preferred to a transformation into a positional space reciprocal space, for example by a one- or multi-dimensional Fourier transformation, in particular by the well-known fast Subjected to Fourier transformation into a reciprocal wave vector space. By the transformation one obtains in the correspond to the place space reciprocal space a second test record of the test fabric, as well as a second reference data set of the inventive method woven fabric. Was transformed into a Fourier transform, For example, using the well-known fast Fourier transform, so represent the second reference data set and the second test data set the corresponding spectra of the wave vectors, which are identical only when the test tissue and the reference tissue used after a identical embodiment of the inventive method woven were. Thus, by comparing the reference data set with the Test data set, for example by appropriate subtraction, to simple It can be determined immediately whether the test fabric is a fake or not.

A particular advantage of the inventive test method is especially in that even the smallest deviations in the test fabric of original fabric, which is in place, so the structure of a fake Test tissue itself are hardly or not detectable, in reciprocal space be detected in a simple manner and with great precision. Of the The reason for this is that even a small modulation of the basic structure, as the woven pattern can be interpreted in Wave vector space, or generally in a space reciprocal to the physical space, as additional intensities in the spectrum of the associated wave vectors to lead.

As already mentioned above, this has been achieved by the invention Test method to be examined pattern prefers no regular Structure, but can be generated, for example, that at the Control of the weaving machine in the weaving process certain parameters, for Example Control parameters in a computer program for control the weaving machine, more or less arbitrarily set, so that the Pattern has no regular structure but rather stochastic Character has. This will change the pattern by applying the according to the invention, as it were provided with a "fingerprint", without knowing the special parameters for controlling the loom when weaving the pattern is practically not reproducible, so only by Use of the inventive test method, a test tissue, the possibly a fabric forgery is verifiable on authenticity.

Each individual loom generates without special Control measures in the web process already one only for this individual weaving machine unique "fingerprint" on which an on this weaving machine woven fabric is uniquely identifiable. The means, every single weaving machine produces a very characteristic Pattern during weaving, by the inventive test method can be recognized. This is especially true on looms from exactly the same type. Two different looms from exactly the same Type thus also produce two distinguishable patterns, that is two distinct distinguishable "fingerprints". Thus, the proposed is suitable Test method also excellent to determine if a particular Fabric was woven on a specific weaving machine or not.

Fig. 1

eine Ausführungsvariante des erfindungsgemässen Verfahrens mit Anschlagssteuerung;

Fig. 2

eine zweite Ausführungsvariante mit variabler Schussfadenspannung;

Fig. 3

eine weitere Ausführungsvariante mit variabler Kettfadenspannung;

Fig. 4

eine andere Ausführungsvariante mit Breithaltersteuerung;

Fig. 5

ein Flussdiagramm des erfindungsgemässen Prüfverfahrens;

Fig. 6

ein spezielles Ausführungsbeispiel gemäss Fig. 5.

In the following the invention will be explained in more detail with reference to the schematic drawing. Show it:

Fig. 1

an embodiment of the inventive method with stop control;

Fig. 2

a second embodiment variant with variable weft tension;

Fig. 3

Another variant with variable warp tension;

Fig. 4

another embodiment variant with spreader control;

Fig. 5

a flowchart of the inventive test method;

Fig. 6

a special embodiment according to FIG. 5.

First, in the following, the inventive method for Producing a fabric based on several more preferred Embodiment explained in more detail.

In FIGS. 1 to 4, a brand label 2 is shown schematically in each case as an example for a fabric 2 produced by the process according to the invention shown. For example, the brand label 2 may refer to a product glued, sewn on or in any other suitable manner to one Product be attached. To identify the corresponding Brand product, the brand label 2 has a characteristic Identification mark 21 on. The identifier itself is preferred after woven in the inventive method in the brand label 2, can but also be connected in another way with the brand label 2.

The decisive factor is that the brand label 2 comprises a basic structure 3 into which a given pattern 4 is woven, the regular or may have stochastic character. The cutout 22 is exemplary magnified in a coordinate system represented by the KS KS preferably orthogonal directions X and Y is clamped. It should be in the following the direction X, each defining the direction in which weaving the weft threads 5 are introduced while substantially along the Direction Y, the warp threads 6 run. These are for the sake of Clarity in FIGS. 1 to 4 in each case either only the warp threads 6 or the weft threads 5 shown. It is understood that the fabric 2 of course, in principle, both from warp threads 6 and from Weft threads 5 is constructed at the same time.

1 schematically shows a fabric 2, here by way of example a brand label 2, represented, in which in a basic structure 3 of the fabric 2 thereby a Pattern 4 is woven during the weaving process, the strength of the Stop the sley from one weft 5 to another Weft 5 is slightly varied. This will make the distance between two Weft threads 5 in the fabric 2 varies, as shown in FIG. 1 can be clearly seen. The variation of the distance between two weft threads 5 is so slight that they are visible to the naked eye, ie without complex technical aids, in the Fabric 2 is not visible. However, even a slight variation of the leads Distance between two weft threads 5 to a disturbance of the periodicity of Tissue 2 along the direction Y, which, as explained later in more detail becomes the appearance of additional characteristic intensities in the reciprocal Room W lead, which are clearly identifiable there.

In Fig. 2, another embodiment is shown schematically, in which the tension of the weft thread 5 when weaving after a given scheme is varied. As a result, the middle one Distance between two weft threads 5 though over the entire fabric 2 in the remains substantially constant, but varies over the length of the shot in the direction X is the distance between two adjacent weft threads 5 locally, because the mechanical tension of the weft thread 5 over its length in the tissue 2 varied. This leads to the characteristic shown schematically in FIG Variation in the distance between two adjacent weft threads 5, what in turn leads to characteristic intensities in the reciprocal space W.

In Fig. 3 was in analogy to the embodiment shown in Fig. 2 the tension of the warp threads 6 varies, which in the direction Y to a local Variation of the distance between two adjacent warp threads 6 leads. One such Pattern 4 may be, for example, by a change in the opening angle during the shedding process during the weaving process according to a given scheme a technique known per se in weaving.

Finally, FIG. 4 shows an example of a fabric 2 in which the Control of a broad holder of the loom according to a predetermined Scheme was influenced. Usually serves in a loom Wide holder to a constant width of the fabric 2 along the Y direction to ensure the warp threads 6 and thus their parallel course. Indeed it is possible, the width of the fabric 2 by suitable control of the Breithalter along the direction Y of the warp threads 6 to vary, so that again in the tissue 2 a deviation from a basic periodicity arises, which is clearly detectable in the reciprocal space.

It goes without saying that the invention relates to the in FIGS. 1 to 4 schematically illustrated embodiments is not limited. In particular, in the inventive method any Combination of the presented pattern 4 can be generated advantageous.

FIGS. 5 and 6 each show the test method P according to the invention schematically explained in more detail.

FIG. 5 schematically shows a flow chart of a test method P and shows, by way of example, a brand label 2 produced according to the method according to the invention and a test fabric 200 which is examined for authenticity. The test fabric 200 can not be distinguished from the genuine brand label 2 without technical aids with the eye. With the help of the technical measuring device 7, which may be for example an optical scanner 7 or a camera 7, each of the tissue 2 and the test fabric 200 is a recording made, each in a digital test data set PD, which represents the test fabric 200 and in a digital reference data set RD representing the tissue 2 transferred. The digital test data set PD and the digital reference data set RD are transformed by a transformation T, for example with a data processing system not shown here by means of a fast Fourier transform FFT, into the second reference data set RD ^-1 and the second test data set PD ^-1 , respectively Test fabric 200 and the tissue 2 in a reciprocal space, here in the wave vector space W represent. To check the authenticity of the test fabric 200, a comparison is made between the second test data set PD ^-1 and the second reference data set RD ^-1 . This comparison can be made, for example, as shown schematically in Fig. 5 by appropriate subtraction of the two second data sets. If the comparison of the two data sets results in a complete agreement, that is to say in the case of a difference formation, an empty result data set E, then the test fabric 200 is genuine, ie produced according to the method according to the invention. If the result data set E after a difference formation from the second reference data set RD ^-1 and the second test data set PD ^{-1 is} not empty, that is to say in a graphical representation of the result data set E in the wave vector space W, intensities still occur, as shown schematically in FIG the test fabric 200 is not produced by the process according to the invention and thus a forgery.

In Fig. 6 is for clarification, the inventive test method P of Fig. 5 explained again with reference to a specific embodiment. in the according to the upper portion of Fig. 5 is a section 22 of a Woven fabric 2, which is woven according to the inventive method was and deviates from an orthogonal regular basic structure Shows 3 different deviations, as shown in part with reference to FIGS. 1 to Fig. 4 have already been described in detail. Dargstellungsgemäss in the lower Area of Fig. 6 is a section 22 of a test fabric 200 shown that the underlying the fabric 2 orthogonal basic structure 3 without Deviations from it. The sections 22 of the tissue shown here 2 and 200 fabric are produced by technical means strong Magnifications of the actual tissue 2, 200. Without technical Aid is the fine structure of the two tissues 2, 200 indistinguishable, that is, the cutouts 22 shown in Fig. 6 see with the naked eye looks completely identical, that is, the test fabric 200 is as Forgery not recognizable and from the tissue 2 with the naked eye not too differ.

As described above, the two sections 22 are each detected with a technical measuring device 7, digitized, transformed by means of a fast Fourier transform FFT in the wave vector space W and shown there for illustration in each coordinate system W of the wave vectors K _x and K _y as a two-dimensional Fourier spectrum. Of course, the illustrated Fourier spectra represent graphically the two second data sets, the second reference data set RD ^-1 and the second test data set PD ^-1 , as discussed inter alia for FIG. 5. The Fourier spectrum of the test fabric 200 shows essentially only a single intensity I _{0 of} the undisturbed basic structure 3 in a narrowly defined wave vector range, as is also expected by the person skilled in the art for a regular structure of this type. In contrast to the intensity I _{0 of} the undisturbed basic structure 3, the Fourier spectrum of the woven fabric 2 woven according to the method according to the invention shows numerous other, more or less widely distributed intensities in other wave vector pairs. These additional intensities have their cause in the disturbances of the basic structure 3 of the fabric 2, which are clearly visible in FIG. By forming the difference between the two Fourier spectra, the result data set E is obtained graphically, which no longer contains the intensity I ₀ characteristic of both tissues 2, 200, but only those intensities that are characteristic of the pattern 4, which only exist in the Basic structure 3 of the fabric 2 is woven. Thus, the test fabric 200 is properly identified as a counterfeit.

Claims (18)

A method for producing a fabric (2), characterized in that in a basic structure (3) of the fabric (2) a predetermined pattern (4) is woven which is used as an identifying feature for testing the authenticity of the fabric (2). The method of claim 1, wherein the pattern (4) is controlled by controlling the Strength of the stop of the batten of a loom after a predetermined scheme is generated. The method of claim 1 or 2, wherein the pattern (4) by Change of a weft tension after a given Scheme is generated. Method according to one of the preceding claims, wherein the Pattern (4) by changing a warp tension after one predetermined scheme is generated. Method according to one of the preceding claims, wherein the Pattern (4) by changing an opening angle in the Shedding is generated according to a predetermined scheme. Method according to one of the preceding claims, wherein the Pattern (4) by a control of a broad holder of the loom is generated according to a given scheme. Method according to one of the preceding claims, wherein the Pattern (4) through the use of different weft threads (5) is generated. Method according to one of the preceding claims, wherein the Pattern (4) through the use of different warp threads (6) is produced. Method according to one of the preceding claims, wherein in the Pattern (4) a serial number is woven. Method according to one of the preceding claims, wherein the Pattern (4) is woven in such a way that it without a technical Measuring device (7) can not be detected by eye. Fabric (2) produced by a process according to any one of preceding claims wherein in a basic structure (3) of the Woven fabric (2) a predetermined pattern (4) is woven which as Identification feature for checking the authenticity of the fabric (2) suitable is. The fabric (2) of claim 11, wherein the pattern (4) is a Serial number includes. The fabric (2) according to claim 11 or 12, wherein the pattern (4) is without Technical measuring device (7) is not visible to the eye. The tissue (2) of any of claims 11 to 13, wherein the tissue (2) is a brand label. Test method for testing the authenticity of a test fabric (200) by comparison with a fabric (2) having a predeterminable pattern (4) in a basic structure (3), in which test method the test fabric (200) is measured by a technical measuring device (7), and from which an at least one-dimensional digital test data set (PD) representative of the test fabric (200) is created, and the digital test data set (PD) is transformed by a one- or multi-dimensional transformation (T) into a second test data set (PD ^-1 ) is characterized in that the tissue (2) is used as a reference for checking the veracity of the test tissue (200), wherein the tissue (2) is detected by measurement, and from which an at least one-dimensional digital reference data set (RD) is created, which is representative for the tissue (2), and the digital reference data set (RD) by a one- or multi-dimensional transformation (T) into a second Referenzda Tensens (RD ^-1 ) is transformed, and by comparing the second test data set (PD ^-1 ) with the second reference data set (RD ^-1 ), the authenticity of the fabric (2) is checked. The test method according to claim 15, wherein the transformation (T) is a one- or multi-dimensional Fourier transformation, preferably one fast Fourier transform (FFT). Test method according to one of claims 15 or 16, wherein the Fabric (2) with pattern (4), which has a characteristic fingerprint a weaving machine, metrologically with a technical Measuring device (7) is detected. A test method according to any one of claims 15 to 17, wherein said Test fabric (200) and / or the fabric (2) for creating the Test data set (PD) and / or the reference data record (RD) with an optical technical measuring device (7) is detected.

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