DE102005062016A1 - Deposit goods e.g. tin security mark, has sensor strips parameter of which indicates magnetizing force, and the permeability is changed to specified factor within specified range by magnetizing force - Google Patents

Abstract

The marking has magnetically soft sensor strips and a number of magnetically semi-hard canceling strips, where the parameter of the sensor strips indicates magnetizing force. The permeability of the sensor strips is changed to a specified factor within a specified range by the magnetizing force. The sensor strips are made of partial amorphous alloy and non-crystalline alloy, where the length, thickness and the width of the sensor strips are changed for adjusting the parameter of the sensor strips. A magnet with a specified diameter is provided as the sensor strips. Independent claims are also included for the following: (1) a return device for deposit goods; and (2) a method of automatic controlling of deposit goods using a label.

Description

The The invention relates to a deposit mark with a soft magnetic Sensor strips and a magnetically semi-hard decal strip, Pledged property with such a mark and a return device for such pledged goods. It concerns Furthermore, a method for automatic control of pledged goods.

The repatriation of pledged property as provided for by law, in particular of cans and PET bottles, offers numerous possibilities for manipulation. A review of the Lien then, if indeed a claim for the refund is a deposit amount, is therefore necessary on redemption. Because the manual return of pledge is very time and labor intensive, the use becomes preferred by automatic return devices.

From the EP 1 515 280 A2 a deposit mark is known, which allows a cheap, easy and quick control in the return and thus limits the possibilities for manipulation. This token has a ferromagnetic indicator element of high magnetic remanence that is not fully magnetized and a ferromagnetic detector element of low magnetic remanence.

Becomes pledged lien into a magnetic Alternating field introduced in the input channel of a reverse vending machine, so the reporting element is constantly up to through the sinusoidal waves into saturation magnetization reversal. Due to the periodic change the permeability from a high (central part of the hysteresis loop) to one small value (in saturation) result in periodic signal pulses with a typical duration tp. This no longer purely sinusoidal signal can be due to additive interference of sinusoidal Signals whose frequency is an integer multiple of the fundamental frequency is to be represented. The resulting harmonic spectrum is with the duration and shape of the signal pulses according to mathematical laws connected and thus can also be used to characterize a valid deposit label be used.

The Occurrence of such signal pulses thus signals a valid deposit mark and a claim for a refund of the deposit.

to Devaluation becomes the enclosed indicator strip by a high Magnetic field magnetized, whereby the signaling element locally in the saturation is driven and would require a high field strength for demagnetization. The alternating magnetic field in the input channel is not strong enough for that the canceled Pfandmarkierung no characteristic signal pulses or emit no more characteristic harmonics more can.

These Deposit marking has the disadvantage of being on the same principle based and made of the same materials markings used for theft prevention of goods. One with one Therefore, goods bearing such a mark can, even if they are paid properly was triggering an alert in a merchandise security system, so that the customer is wrongly suspected of theft. Conversely, can also a merchandise security label in a reverse vending machine to the unauthorized refund of the deposit.

task the present invention is therefore to provide a deposit mark which is easy and inexpensive to produce, a fast and safe Marking of pledged goods allowed and in the case of a confusion with Anti-theft labels are excluded.

A Another object of the invention is a method for automatic Control of pledged goods, a distinction of the by the pledge mark emitted signal from one by labels signal transmitted to theft protection and thus the possibilities restricted for manipulation.

According to the invention, this object is achieved by a deposit mark with a soft magnetic sensor strip and one or more magnetically semi-hard decal strips, wherein a characteristic H _{K of} the sensor strip, the magnetic field strength at which the permeability μ of the sensor strip within a field range of H _K ± 35% H _K to a factor ≥ 2 changes, denoted and 40 A / m ≤ H _K ≤ 1500 A / m applies.

The invention is based on the consideration that a confusion of signals emitted by the deposit marking with signals emitted by labels for theft prevention should be avoided by the signal of the deposit marking having a signal identity which differs from that of the eti chains for theft protection differs significantly. As a distinguishing feature in particular the time course of the signal or the shape of the harmonic spectrum is suitable.

The temporal signal curve has voltage pulses of duration t _p , wherein the duration t _{p in} addition to the frequency and the strength of the exciting field is determined in a significant manner by the amount of the characteristic H _K. For reliable differentiation of the signals, the parameter H _{K of} the pledge marking should be so long and the pulse duration t _p so long that the voltage pulses are no longer detected by the on-line security system as belonging to an activated anti-theft device.

On the other hand, however, the parameter H _{K should be} significantly lower than that of a devalued anti-theft device or the common magnetic objects such as paper clips, to prevent a likelihood of confusion here. A suitable value for the parameter H _K is therefore between 40 A / m and 1500 A / m, with a value ≦ 1000 A / m and a value ≥ 100 A / m being particularly preferred.

advantageously, the sensor strip consists of an amorphous or nanocrystalline Alloy. An amorphous sensor strip has a crystalline over the Advantage that it has a high mechanical yield strength, the a destruction the set magnetic properties by plastic deformation practically impossible power.

In a preferred embodiment of the invention, the material of the sensor strip has a composition of the formula (A _x T _1-x ) _m Z _1-m , wherein A iron and / or cobalt, T at least one of the elements nickel and / or manganese and Z at least one of the elements titanium, vanadium, chromium, zirconium, Ni ob, molybdenum, hafnium, tantalum, tungsten, palladium, copper, silver, gold, zinc, tin, boron, carbon, nitrogen, aluminum, silicon, phosphorus, gallium, and / or commercially available impurities and 70 ≤ m ≤ 92 at% and 0.15 <x ≤ 1 applies.

Particularly suitable as material of the sensor strip ( 2 ) is a cobalt base alloy having a composition of the formula Co _a Fe _b Mn _c Ni _d M _e Si _f B _g X _h , where M is at least one of titanium, vanadium, chromium, zirconium, niobium, molybdenum, hafnium, tantalum, tungsten , Gallium and / or copper, X is at least one of the elements carbon, aluminum, germanium, phosphorus and / or commercially available impurities and a to h are given in atomic percent with a ≥ 10; a + b ≥ 15; 0 ≤ b + c ≤ 15; d ≤ 65; 8 ≤ e + f + g + h ≤ 35; e ≤ 15; 0 ≤ f ≤ 20; 1 ≤ g ≤ 30 and h ≤ 10.

Specifically, the compositions Co ₆₈ Fe ₄ Mo _1.5 Si _16.5 B ₁₀ , Co ₃₁ Ni ₄₀ Fe ₇ Si ₁₃ B ₉ , Co ₅₈ Ni ₁₃ Fe _5.5 Si _14.5 B ₉ , Co ₇₂ Fe ₁ Mn ₄ Mo ₁ Si ₁₃ B ₉ , Co ₄₈ Ni ₁₅ Fe _5.5 Mn ₁ Si ₄ B _16.5 or Co ₇₂ Fe _4.5 Si _5.5 B ₁₈ are well suited as materials for the sensor strip.

Such cobalt alloys have the advantage that they have a small or vanishingly small magnetostriction, ie deform at most very slightly during demagnetization or demagnetization. The sensor strip advantageously has a saturation magnetostriction constant λ _S of at most 3 ppm.

The desired value of the parameter H _K can be adjusted via the dimensions of the sensor strip. Advantageously, the length l, the thickness d and the width b of the sensor strip are selected so that the parameter H _{K has} a value of 40 A / m ≦ H _K ≦ 1500 A / m. The sensor strip can be embodied in various forms, for example as a wire or as a band. The geometry and the dimensions of the sensor strip have the following influence on the parameter H _K and on the signal emitted by the sensor strip: H _K is approximately proportional to the width b, the thickness d and the saturation magnetization B _S and the remanent magnetization B _{r of} the sensor strip and inversely proportional to the square of its length l.

H _K can best be increased by increasing b, d and / or B _s . A reduction of 1 in order to increase H _K is less advantageous because of the proportionality of the maximum measured voltage signal U to the square of length 1, because it would be at the expense of detection sensitivity.

advantageously, the sensor strip is either a substantially round wire Cross section with a diameter D of at least 100 microns or as Tape or film with a thickness d of 5 μm ≤ d ≤ 50 μm and a width b of 0.1 mm ≤ b ≤ 50 mm, especially advantageous with 0.4 mm ≤ b ≤ 5 mm and 15 μm ≤ d ≤ 35 μm. For his Length l is advantageously 5 mm ≤ 1 ≤ 30 mm.

Particularly preferred embodiments of the sensor strip, ie particularly suitable Kombina Alloy compositions and dimensions of the sensor strip are shown in the table below.

H _K can also be increased or decreased by heat treatment in the magnetic field, mechanical stress heat treatment, and / or heat treatment with electrical current flowing through the ribbon. In the embodiments marked with (*), (**) or (***), the sensor strip material is subjected to a heat treatment for setting the parameter H _K. Heat treatments are known in the art. For the marked with (*) embodiment of the sensor strip, for example, from the US 6,171,408 known heat treatment, for with (**), for example, from the US 5,757,272 known and for the marked with (***) embodiment, for example, from the US 6,011,475 known heat treatment.

The coercive field strength H _c of the validator strip is expediently greater than that of the sensor strip. It is advantageously set at H _c ≥ 10 kA / m, preferably at H _c ≥ 20 kA / m. Such coercive forces H _c are particularly suitable for alloys containing iron and / or cobalt, and advantageously additionally at least one of chromium, molybdenum, vanadium, cobalt, nickel, aluminum, titanium, tungsten and tantalum. A commercial example of such an alloy is CROVAC, which has a coercive force adjustable between about 30 kA / m and 50 kA / m through appropriate manufacturing steps.

alternative can be used as material for the decal strip also be provided with a hard ferrite-containing varnish, which typically has a coercive force greater than 100 kA / m.

The Deposit marking according to the invention Can be kept durable on the pledge and on the return be controlled quickly and easily.

One Take-back device for the automatic taking back by pledge includes a query zone in which the pledge to control is introduced, a device for generating a magnetic Alternating field and a device for receiving and analyzing electromagnetic waves.

A method for automatic control of pledged material according to the present invention comprises the following steps: The soft magnetic sensor strip is introduced into an alternating magnetic field within an interrogation zone, by which a permanent remagnetization of the sensor strip is achieved in each case to saturation. The latter then emits signal pulses having a duration t _p characteristic of its saturation field strength H _K.

The field strength of the excitatory field must be greater than H _K , for example 2-3 times as large as H _K , but at the same time smaller than the typical coercive field of validator anti-theft tag strips. Since in addition to H _K and the frequency and maximum field strength of the exciting field, the time t _p of the pulse signal determines that particular setting must be taken into account in the evaluation electronics.

The Signal pulses are transmitted through a device for receiving electromagnetic Waves are received and the signal is measured and analyzed. The Deposit mark will be valid viewed when the duration of the in the alternating field Remagnetization of the sensor strip occurring voltage pulses within a given range. In this case, the deposit amount refunded.

This method is particularly well-suited for use in pawn markings where the H _{K of} the sensor strip has been set to be greater than that of activated article security tags, but lower than that of deactivated article security tags or everyday magnetizable objects.

In this case, namely, the duration t _{p of} the voltage pulses differs sufficiently from those in a signal that is emitted by retail security labels. A likelihood of confusion does not exist.

in the Following the check of the pawn mark can be the magnetization state changed the validator strip to devalue the pawn label. On in activated state The label's demagnetized decal strip becomes a devaluation magnetized while a sticker strip magnetized in the activated state of the label is demagnetized for devaluation.

However, it is also possible to distinguish the signals by a suitable design of the method for controlling the pledge. For this purpose, the label for deposit marking in addition to the soft magnetic sensor strip on a magnetically semi-hard decal strip whose coercive force H _{c is set} appropriately and, for example, greater than 20 kA / m.

In this method, a magnetic pulse with the field strength H _{1 is} emitted after the introduction of the label in the alternating magnetic field and the measurement of the signal then emitted by the sensor strip. H ₁ is chosen to be greater than the typical field strength needed to deactivate conventional security tags, but less than the coercive field strength of the validator strip. For example, H1 is chosen in the range 10-20 kA / m. The magnetization state of the validator strip is therefore not changed by the pulse of the intensity H ₁ .

This is followed by a second measurement of the sensor strip signal and the emission of another magnetic pulse with the intensity H ₂ , which is greater than the field strength H ₁ . It is also greater than the coercive field strength of the decoder strip, so that it changes its magnetization state, thus causing its magnetization or demagnetization.

Subsequently, will the sensor strip signal is measured for the third time. If the validator strip in its activated state, so if there is no devaluation of the Pawning has taken place, is demagnetized, the Deposit mark as valid with which a claim to the refund of the pledge amount exists when in the first and second measurements of the sensor strip signal still characteristic signal pulses are received, in the third Measurement no longer.

The differentiation of the deposit mark from a goods security label is therefore very simple with this method: A goods security label would be deactivated because of the lower coercive field strength of its validator strip by H ₁ , so that even in the second measurement of the sensor strip signal no more characteristic signal pulses would be detected.

alternative can also the validator strip in its activated / valid state, So if there was no devaluation of the pledge mark has to be magnetized. Whether the magnetized or the demagnetized Decal strip the right to a refund of the deposit amount is just a matter of definition.

Are defined the magnetized validator strip the activated / valid state the pledge marking, so are the steps of the procedure for control of the pledge carried out the same way as in the first case where the demagnetized decal strip the activated / valid State of the deposit mark defined.

Indeed differs the evaluation of the measured signals: In this second case, the deposit mark is considered valid, which is a claim on the refund of the deposit, if in the first and second measurement the sensor strip signal still no characteristic signal pulses but in the third measurement.

In this alternative method, the distinction of the deposit label from a consumer tag or a magnetic everyday object is made by the fact that a goods security label would have emitted characteristic signal pulses already in the second measurement of the sensor signal, since the field strength H _{1 is} sufficient for its activation.

embodiments The invention will be described below with reference to the accompanying drawings explained in more detail. It demonstrate

1a A deposit tag with a sensor strip and a decal strip;

1b an alternative embodiment of the label with two Entwertestreifen;

2 a diagram with a simplified hysteresis curve to explain the meaning of the characteristic H _K ;

3 a diagram for explaining the relationship between the characteristic H _K and the shape of the induced signal and

4 schematically a return device for the automatic control of deposit marks.

Same Parts are provided in all figures with the same reference numerals.

1a shows the supervision of a label for deposit marking 1 with a soft magnetic sensor strip 2 and a magnetic semi-hard decal strip located adjacent the sensor strip 3 , The sensor strip 2 has a length l and a width b and also a thickness d, which is not recognizable in this illustration because it extends into the plane of the paper.

There may also be several validator strips 3 , for example, two as in 1b shown to be used. The pawn mark 1 can be welded into a plastic protective cover, not shown, but it can also be incorporated directly into the mortgage, such as a PET bottle. The sensor strip 2 and the validator strip 3 are arranged side by side or one above the other, so that they are parallel with respect to external magnetic fields, but internally form a magnetic circuit.

Will the pawn mark 1 is introduced in the return of the pledge in a magnetic alternating field and is the validator strip 3 in its activated state and the deposit mark 1 thus valid, so the soft magnetic material of the sensor strip 2 constantly re-magnetized with the frequency of the alternating field. The strength of the alternating field or the saturation magnetization of the sensor strip 2 are adjusted so that the material of the sensor strip 2 in the case of remagnetization, saturation in each case is reached, but smaller than the coercive field strength of the validator of commercial counterfeit labels.

This will make the sensor strip 2 excited to emit an electromagnetic signal having a characteristic time course. This signal is received and analyzed by an antenna. Since the shape of the time course of the signal characteristic of the magnetic properties of the sensor strip 2 is, the analysis serves to investigate, if any, a pledge marker 1 or, for example, a merchandise security label based on the same detection principle.

To deactivate the deposit mark 1 after the refund of the deposit amount becomes the magnetically half hard decal strip 3 Magnetized by a strong magnetic field. Alternatively, two or more validator strips 3 as in 1b be arranged and be magnetized.

The magnetic field of the magnetized decal strip becomes the material of the sensor strip 2 brought locally to saturation and it can be only short sections in the alternating field re-magnetize. The parameter H _K is inversely proportional to the square of the length l of the magnetized sections and increases to more than 1500 A / m by magnetizing the decoder strip. It is therefore in an area in which the characteristic H _K deactivated goods security tags or everyday magnetic objects falls and which is not accessible by the magnetic alternating field to control the deposit mark.

Of the Sensor strip of a pledge marker with a magnetized Decoder strip therefore no longer sends any characteristic signals when it is brought into the alternating magnetic field. The magnetization the validator strip is used for the devaluation of the deposit mark after the refund of the deposit.

Thus a confusion of the pledge marking 1 safely out with a merchandise security label must be closed, the magnetic properties of the sensor strip 2 different from those of a security tag so that they each emit clearly distinguishable signals.

The shape of the signal pulse can be influenced, for example, by the parameter H _K , which is defined as the magnetic field strength at which the permeability μ of the sensor strip changes within a field range of H _K ± 35% H _K by a factor ≥ 2 ,

The parameter H _K depends on the material and on the geometry and dimensions of the sensor strip. It may also be increased or decreased by a heat treatment in the magnetic field, a heat treatment under mechanical stress and / or a heat treatment with an electric current flowing through the belt.

As in 2 shown schematically on the basis of a simplified hysteresis curve is the characteristic H _K that magnetic field strength at which the magnetic hysteresis curve significantly changes their permeability from, for example μ ≈ 1000 to μ ≤ 500 and as is the case when B reaches the value of the saturation magnetization B _S.

The relationship between the shape of the signal and the characteristic H _K is in 3 The upper part shows the exciting magnetic field H plotted as a function of time t, the course of which is typically sinusoidal. Excited by this magnetic field, the sensor strip responds by emitting a characteristic signal.

This signal no longer has a pure sinusoidal shape due to the non-linear nature of the permeability of the sensor strip. In the lower part of the diagram, the voltage induced in the antenna is also plotted as a function of time t. Recognizable voltage pulses of the time period t _p , wherein the time period t _p at predetermined excitation conditions such as maximum amplitude and frequency of the exciting magnetic field depends on the magnitude of the characteristic H _K.

Retail security labels are typically characterized by H _K ≤ 30 A / m. If, for example, H _K ≥ 40 A / m is selected as the parameter for the sensor strip, it is possible to rule out any confusion between the pledge marking and the article security label.

To satisfy the condition H _K ≥ 40, both the choice of material with appropriate saturation magnetization for the sensor strip and its geometry and dimensions are critical. Although the sensor strip can be made as a round cross-section wire, a flat tape design is more cost effective for most applications because a flat token can be more inconspicuous and less objectionable to the stock.

When Material for the sensor strips are particularly suitable amorphous cobalt-based alloys, because their magnetic properties are due to mechanical stress such as buckling and bending can not be influenced. Preferred are Cobalt-based alloys with additives of iron and / or manganese, since these are no or only a very small Magnetostriction show and therefore are particularly robust.

The Materials of both the sensor strip and the validator strip have to Curie temperatures above Room temperature, so they under use conditions at all are magnetizable.

A return device for the automatic control of the deposit mark 1 is schematic in 4 shown. Here is the arrangement of the coils 6 . 7 and 8th shown only schematically. These coils can also be arranged in a different order and several sensor, excitation and deactivation coils can be provided and arranged one behind the other.

The with the deposit mark 1 provided pledge 4 will be in the query zone 5 one through the exciter coil 8th produced alternating magnetic field, which excites the sensor strip to emit a characteristic signal. The sensor strip signal is passed through the sensor or pick-up coil 6 received and analyzed by an analysis unit, not shown, which evaluates the sensor strip signal in terms of its shape, its time course and its frequency spectrum.

The deactivation coil 7 is used to deactivate the deposit mark 1 following the occurred Control. It generates a temporally decaying magnetic field starting from a strength that is significantly larger than that of the exciter coil 8th and sufficient to cause magnetization or demagnetization of the validator strip.

1

Pawn mark

2

sensor strip

3

Entwertestreifen

4

pledged property

5

interrogation zone

6

sensor coil

7

deactivation coil

8th

excitation coil

l

length

d

thickness

b

width

B _s

saturation magnetization

t _p

pulse duration

Claims (29)

Deposit mark ( 1 ), which has a soft-magnetic sensor strip ( 2 ) and one or more magnetic semi-hard decal strips ( 3 ), wherein the characteristic H _{K of} the sensor strip denotes the magnetic field strength at which the permeability μ of the sensor strip changes within a field region of H _K ± 35% H _K by a factor of ≥ 2, and 40 A / m ≦ H _K ≦ 1500 A / m applies. Deposit mark ( 1 ) according to claim 1, characterized in that the characteristic H _K ≤ 1000 A / m. Deposit mark ( 1 ) according to claim 1 or 2, characterized in that the characteristic H _K ≥ 100 A / m. Deposit mark ( 1 ) according to one of claims 1 to 3, characterized in that the sensor strip ( 2 ) consists of an at least partially amorphous alloy. Deposit mark ( 1 ) according to claim 4, characterized in that the sensor strip ( 2 ) consists of an at least 50% amorphous alloy. Deposit mark ( 1 ) according to claim 4 or 5, characterized in that the sensor strip ( 2 ) consists of an at least 70% amorphous alloy. Deposit mark ( 1 ) one of claims 1 to 3, characterized in that the sensor strip ( 2 ) consists of a nanocrystalline alloy. Deposit mark ( 1 ) according to one of claims 1 to 7, characterized in that the sensor strip ( 2 ) has a saturation magnetostriction constant λ with | λ | ≤ 3 ppm. Deposit mark ( 1 ) according to one of claims 1 to 8, characterized in that the sensor strip ( 2 ) has a saturation magnetostriction constant λ with | λ | ≤ 1 ppm. Deposit mark ( 1 ) according to one of claims 1 to 9, characterized in that the material of the sensor strip ( 2 ) has a composition of the formula (A _x T _1-x ) _m Z _1-m , where A is iron and / or cobalt, T is nickel and / or manganese and Z is titanium, vanadium, chromium, zirconium, niobium, molybdenum, hafnium , Tantalum, tungsten, palladium, copper, silver, gold, zinc, tin, boron, carbon, nitrogen, aluminum, silicon, phosphorus, gallium, and / or commercial impurities and 70 ≤ m ≤ 92 at% and 0.15 <x ≤ 1 applies. Deposit mark ( 1 ) according to one of claims 1 to 10, characterized in that as material of the sensor strip ( 2 ) a cobalt-base alloy having a composition of the formula Co _a Fe _b Mn _c Ni _d M _e Si _f B _g X _h is provided, wherein M is at least one of the elements titanium, vanadium, chromium, zirconium, niobium, molybdenum, hafnium, tantalum, tungsten, gallium, and / or copper, X is at least one of the elements carbon, aluminum, germanium, phosphorus and / or commercial impurities and a to h are given in atomic percent with a ≥ 10; a + b ≥ 15; 0 ≤ b + c ≤ 15; d ≤ 65; 8 ≤ e + f + g + h ≤ 35; e ≤ 15; 0 ≤ f ≤ 20; 1 ≤ g ≤ 30 and h ≤ 10. Deposit mark ( 1 ) according to one of claims 1 to 11, characterized in that the alloy for the sensor strip ( 2 ) one of the compositions Co ₆₈ Fe ₄ Mo _1.5 Si _16.5 B ₁₀ , Co ₃₁ Ni ₄₀ Fe ₇ Si ₁₃ B ₉ , Co ₅₈ Ni ₁₃ Fe _5.5 Si _14.5 B ₉ , Co ₇₂ Fe ₁ Mn ₄ Mo ₁ Si ₁₃ B ₉ , Co ₅₈ Ni ₁₅ Fe _5.5 Mn ₁ Si ₄ B _16.5 , Co ₇₂ Fe _4.5 Si _5.5 B ₁₈ , Fe ₇₈ Si ₉ B ₁₁ C ₂ , Fe ₂₄ Co ₁₂ Ni _46.5 Si _1.5 B ₁₆ , Fe ₂₄ Ni _58.5 Si _1.5 B ₁₆ , Fe ₆₀ Co ₁ 0Cr ₁₀ Si ₁₁ B ₉ , Fe ₄₀ Ni ₄₀ Mo ₄ B ₁₆ , Fe _65.3 Co ₁₈ Si _0.8 B ₁₅ C _0.4 , Fe _73.5 Cu ₁ Nb ₃ Si _13.5 B ₉ , Fe _73.5 Cu ₁ Nb ₃ Si _15.5 B ₇ , Fe ₉₀ Co ₁ Zr ₇ B ₂ or Fe ₈₄ Nb ₇ B ₉ , Deposit mark ( 1 ) according to one of claims 1 to 12, characterized in that the length l, the thickness d and the width b of the sensor strip are suitably selected for setting the characteristic H _K. Deposit mark ( 1 ) according to one of claims 1 to 13, characterized in that for adjusting the parameter H _K, a heat treatment of the sensor strip material is provided. Deposit mark ( 1 ) according to one of claims 1 to 14, characterized in that as sensor strip ( 2 ) is provided a magnetic wire having a diameter D with D ≥ 100 microns. Deposit mark ( 1 ) according to one of claims 1 to 14, characterized in that as sensor strip ( 2 ), a magnetic tape or a film having a thickness d of 5 μm ≦ d ≦ 50 μm and a width b of 0.1 mm ≦ b ≦ 30 mm is provided. Deposit mark ( 1 ) according to claim 16, characterized in that the sensor strip ( 2 ) has a length l of 5 mm ≦ 1 ≦ 30 mm, a width b of 0.4 mm ≦ b ≦ 5 mm and a thickness d of 15 μm ≦ d ≦ 35 μm. Deposit mark ( 1 ) according to one of claims 1 to 17, characterized in that the coercive force H _{c of} the validator strip ( 3 ) is greater than that of the sensor strip ( 2 ). Deposit mark ( 1 ) According to one of claims 1 to 18, characterized in that (for the coercive force H _c of the one or Entwertestreifen 3 ) H _c ≥ 10 kA / m. Deposit mark ( 1 ) according to one of claims 1 to 19, characterized in that for the coercive force H _c of the decal strip or strips ( 3 ) H _c ≥ 20 kA / m. Deposit mark ( 1 ) according to one of claims 1 to 20, characterized in that as material for the decal strip ( 3 ) an iron-containing alloy is provided. Deposit mark ( 1 ) according to claim 21, characterized in that the decal strip ( 3 ) additionally contains at least one of chromium, molybdenum, vanadium, cobalt, nickel, aluminum, titanium, tungsten and tantalum. Deposit mark ( 1 ) according to one of claims 1 to 20, characterized in that as material for the decal strip ( 3 ) is provided a hard ferrite-containing paint. Pledge ( 4 ) with a deposit mark ( 1 ) according to one of claims 1 to 23. Return device for pledged goods ( 4 ) with a deposit mark ( 1 ) according to one of claims 1 to 23 with an interrogation zone ( 5 ), a device for generating ( 8th ) of an alternating magnetic field within the interrogation zone and a device for receiving ( 6 ) and for analyzing by excitation of the sensor strip ( 2 ) by the alternating magnetic field through the sensor strip ( 2 ) radiated electromagnetic fields. Method for the automatic control of pledged goods by means of a deposit marking label ( 1 ) with a soft magnetic sensor strip ( 2 ) with the following steps: - inserting the sensor strip ( 2 ) in an alternating magnetic field, wherein the sensor strip ( 2 ) is re-magnetized with the frequency of the alternating field and emits signal pulses having a duration t _p characteristic of its parameter H _K ; - Measurement of the sensor strip signal; - the deposit mark ( 1 ) is considered valid, which is entitled to a refund of the deposit amount, if the duration t _{p of} the in the alternating field remagnetization of the sensor strip ( 2 ) occurring voltage pulses in a predetermined range. A method according to claim 26, characterized in that the decal strip ( 3 ) following the inspection of the pledge ( 4 ) is magnetized. Method for the automatic control of pledged goods by means of a deposit marking label ( 1 ) with a soft magnetic sensor strip ( 2 ) and a magnetically semi-hard, demagnetized decal strip ( 3 ) with the following steps: - inserting the sensor strip ( 2 ) in an alternating magnetic field, wherein the sensor strip ( 2 ) is re-magnetized with the frequency of the alternating field and emits signal pulses having a duration t _p characteristic of its parameter H _K ; - Measurement of the sensor strip signal; - emitting a first magnetic pulse with a high magnetic field strength H ₁ ,; Second measurement of the sensor strip signal; - emitting a second pulse with a high magnetic field strength H ₂ , where H ₁ <H ₂ ; Third measurement of the sensor strip signal; - the deposit mark ( 1 ) is considered valid, which is entitled to a refund of the deposit amount, if in the first and second measurement of the sensor strip signal characteristic signal pulses are received in the third measurement but not more. Method for the automatic control of pledged goods by means of a deposit marking label ( 1 ) with a soft magnetic sensor strip ( 2 ) and a magnetically semi-hard, magnetized decal strip ( 3 ) with the following steps: - inserting the sensor strip ( 2 ) in an alternating magnetic field, wherein the sensor strip ( 2 ) is re-magnetized with the frequency of the alternating field and emits signal pulses having a duration t _p characteristic of its parameter H _K ; - Measurement of the sensor strip signal; - emitting a first magnetic, time-decreasing pulse with a high initial magnetic field strength H ₁ ,; Second measurement of the sensor strip signal; - emitting a second magnetic, time-decreasing pulse having a high initial magnetic field strength H ₂ , where H ₁ <H ₂ ; Third measurement of the sensor strip signal; - the deposit mark ( 1 ) is considered valid, which entitles the holder to a reimbursement of the deposit amount if no characteristic signals are received in the first and second measurements of the sensor strip signal, but in the third measurement.