FR2604548A1 - METHOD FOR MANUFACTURING RESONANCE CIRCUIT LABELS - Google Patents

Abstract

THE INVENTION RELATES TO A DEACTIVABLE LABEL THAT CAN BE USED IN AN ELECTRONIC ARTICLE MONITORING SYSTEM AND ITS MANUFACTURING PROCESS. THE LABEL 19 IS COMPOSED OF A FLAT CONDUCTIVE MATERIAL WHICH IS CUT IN THE FORM OF TWO INVERTED SPIRAL CONDUCTORS 25, 30 WHICH ARE WOUND AROUND THE OTHER AND POSITIONED SO AS TO ESTABLISH A CAPACITIVE AND INDUCTIVE COUPLING; THESE CONDUCTORS FORM A RESONANCE CIRCUIT; THERE IS PROVIDED BETWEEN THESE CONDUCTORS 25, 30 A TAPE CONSTITUTES NORMALLY NON-CONDUCTIVE MATERIAL BUT WHICH BECOMES CONDUCTIVE WHEN A QUESTION SIGNAL IS APPLIED AT A LEVEL HIGHER THAN NECESSARY FOR THE ACTIVATION OF THE 'LABEL; EACH RIBBON IS ASSOCIATED WITH A WELL-DETERMINED RESONANCE CIRCUIT AND IT CANNOT ESTABLISH CONTACT WITH ANOTHER RESONANCE CIRCUIT. APPLICATION TO SURVEILLANCE SYSTEMS FOR EXHIBITIONS, STORES, ETC.

Description

-. "2604548

  1. The present invention relates to the field of resonance circuit tags used in electronic article surveillance systems as well as

  than a method of manufacturing such labels.

  With respect to the prior art, the following patents are cited: U.S. Patent 3,240,647 issued to Morgan on March 15, 1966; U.S. Patent 3,624,631 issued to Chomet on November 30, 1971; U.S. Patent 3,810,147 issued to Lichtblau on May 7, 1974; U.S. Patent 3,913,219 issued to Lichtblau on October 21, 1975; U.S. Patent 4,482,874 issued to Rubertus et al on November 13, 1984; U.S. Patent 4,555,291 issued to Tait et al on November 26, 1985; U.S. Patent 4,567,473 issued to Lichtblau on January 28, 1986; and the

  French patent 2,412,923 issued to Degueldre.

  An object of the invention is to create a simple but effective method of manufacturing releasable resonant circuit tags, which are reliable

  for use in electronic surge systems

vigilance of articles.

  Another object of the invention is to create deactivatable, perfected and reliable resonant circuit tags which can be fabricated

serial.

  It has been found that a deactivated label

  vable can be accidentally disabled prematurely

  before the tag is ready to be deactivated when desired. Such deactivation can

  occur during manufacture or even after

  cation, for example during storage or when

  a strip of labels is being printed on a marking machine. Deactivation can occur due to static build-up

  which can produce an arc in a longitudinal direction

  along the strip between circuits of reso-

  If the resonance circuits are touching each other or are too close to each other, and additionally if a normally nonconductive, off-circuit deactivator extends longitudinally from one resonant circuit to another. By spacing the circuits

  of resonance with each other in the long-term

  dinal the strip and separating the strip of deactivation material in the form of separate ribbons and spaced so that there is a quencher ribbon

  for each resonance circuit, the deactivation

  premature evolution of adjacent resonance circuits,

  even if at the same time the conductive material whose

  cooked resonance are formed and the material of deactivation

  are in the form of a band.

  Other features and advantages of the invention will be highlighted, in the following

  description, given by way of non-limiting example, in

  reference to the accompanying drawings in which: Figure 1 is an exploded perspective view of a label according to an embodiment of the invention;

  Figure 2 is a fragmentary sectional view

  the label shown in Figure 1; Figure 3 is a perspective view

  schematic showing a manufacturing process

  labeling according to the invention;

  Figure 4 is a schematic plan view.

  tick showing a mask that has been placed on a first adhesive-coated strip, the Figure showing an electroconductive strip being applied against the first adhesive-coated strip and provided with the mask; Fig. 5 is a schematic plan view showing the conductive strip which has been cut to form first and second pairs of conductors, the figure showing a second adhesive-coated band provided with a mask, which is in the process of be placed on the conductive strip;

  Figure 6 is a schematic plan view.

  showing the first coated strip, to which the first conductors are bonded, which is separated from the second coated strip, on which the second conductors are glued, the figure further showing the first coated strip which has been covered again with adhesive as well as two dielectric strips that are being placed on the first doubly coated tape, and showing the dielectric strips that have been coated with adhesive;

  Figure 7 is a schematic plan view.

  tick showing the second coated strip, on which the second conductors are stuck, which has been shifted

  above the dielectric strips and which has been applied

  on these, as well as on the first

  dressed with the first drivers glued to

  to form a strip of composite labels, the figure

  tracing the first and second conductors of each tag to form resonant circuits for each tag, and showing the division of the tag band composes to form a series of composite tag strips; Figure 8 is a vertically exploded view showing the first and the second coated strip,

  equipped with the first and second drivers, which result

  attempt to spiral cut the electrical tape-

  conductive Fig. 9 is a plan view showing the first and second coated strips, which have been shifted by a distance equal to the width of a conductive spiral. plus the width of a conductor; Figure 10 is a plan view of two labels, the dielectric strip being represented by dashed lines; Fig. 11 is a fragmentary perspective view which illustrates, when viewed in combination with the preceding figures, an improved method of making deactivatable tags;

  Figure 12 is a fragmentary plan view

  made on line 12-12 of Figure 11; Figure 13 is a sectional view taken along line 13-13 of Figure 12; Figure 14 is a fragmentary perspective view, similar to Figure 1 but showing a

  realization of a deactivation structure of the label

quette;

  Figure 15 is a fragmentary plan view.

  the label shown in Figure 14; Figure 16 is a perspective view

  fragmentary, which when observed in combination with

  FIGS. 1 to 10 illustrate another improved process for making deactivatable labels;

  Figure 17 is a fragmentary plan view.

  made on line 17-17 of Figure 16; Figure 18 is a sectional view taken along line 18-18 of Figure 17; Fig. 19 is a fragmentary perspective view, similar to Fig. 14 but showing another embodiment of a label deactivation structure;

  Figure 20 is a fragmentary plan view.

  the label shown in Figure 19;

  Figure 21 is a sectional sectional view of

  blable in Figure 18 but showing another disabling structure of the tag; Figure 22 is a plan view of a

  another model of cutting the web of material con-

  duct corresponding to D in Figure 5;

  Figure 23 is a plan view of the

  model of cutting, one half of the material con-

  ductrice being removed and corresponding in its

  appears at G in Figure 6; Fig. 24 is a schematic perspective view showing how the deactivation material strips are cut into ribbons or strips; and Figure 25 is a plan view of two

  resonance circuits spaced longitudinally and

  respective separate deactivation ribbons.

  Referring initially to Figure 1,

  this represents an exploded view of a label

  as a whole by 19. The label 19 is

  felt as comprising a 20T sheet provided with a

  pressure-sensitive adhesive 21,22 on its opposite sides

  Sees. A mask 23 corresponding to a spiral model

  covers a portion of the adhesive 21 and an anti-adhesive

  24T adhesion is adhesively bonded to the adhesive

  22. The mask 23 makes the adhesive 21 it covers non-sticky or substantially non-sticky. A conductive spiral, generally 25, includes a spiral conductor 26 having a number of turns. The conductor 26 has substantially the same width along its length, except for a connecting rod 27 placed in the outermost part of the conductive spiral 26. There is provided a dielectric sheet 28T arranged and bonded to the conductive spiral 25 and

  the underlying sheet 20T by means of an adhesive 29.

  A conductive coil referred to generally comprises a spiral conductor 31 provided with a number of turns. The conductor 31 is stuck on the adhesive 29 placed on the dielectric 28T. The conductor 31 is substantially the same width along its length, except for a connecting rod 32 provided in the outermost portion of the conductive spiral 30. The conductive spirals 25 and 30 are generally aligned in a face-to-counter relationship. face, except for portions 33 which are not placed face-to-face with conductor 26 and except for parts 35

  which are not placed face to face with the conductor

  31. A 37T sheet is coated with an adhesive

  pressure-sensitive system 38 which has been provided with a

  spiraling 39 by means of a mask. The exposed adhesive 38 'is aligned with the conductive spiral 30. The adhesive is shown in Figure 1 by a dense dotted line and

  the masking is represented in FIG.

  low density with transverse hatching. The connecting bars 27 and 32 are connected electrically by

  90. It should be noted that the bro-

  Chage 90 occurs at the point where the terminal strips 27 and 32 are separated only by the adhesive 29. There is no paper, film or the like between the connecting strips 27 and 32. In correspondence, the pinning claimed in the present application debrevet

is reliable.

  Figure 3 is highlighted

  a method of manufacturing the label 19 shown in FIGS. 1 and 2. A roll 40 is shown as being composed of a composite web 41 having a web 20 provided with continuous coatings of pressure-sensitive adhesive 21 and 22 on its opposite sides. The strip 20 is thus adhesive on both sides. A release liner or strip 42 is releasably adhered to the upper side of the strip 20 by means of the pressure-sensitive adhesive 21 and the underside of the strip 20 has a liner

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  or release liner 24 releasably adhered to the pressure-sensitive adhesive 22. As indicated, the release liner 42 is peeled off the tape to expose the adhesive 21. The adhesive-coated tape 20 and the Release liner 24 runs partially around a roll 43 surrounded by sandpaper and between a pattern-forming roll44 and a backing roll 45 where masking patterns 23 are applied to the adhesive 21 so at

  to form adhesive models 21 'repeating themselves longitudinally

  nally. A masking material from a source

  46 is deposited on the model forming roll44.

  With reference to FIG. 4, the portion designated A represents the portion of the strip 20 located immediately upstream of the pattern forming roll44. The part designated B represents the masking patterns 23 which are printed by the roll 44. The patterns 23 are

  represented by cross-hatching in Figure 4.

  With reference to FIG. 3, the strip 20 then passes through a dryer 47 where the masking models

  23 are dried or cooked. The adhesive 21 is rendered non-

  The tape 49 of a white and electrically conductive material such as copper or aluminum from a roll 48 is deposited on the coated tape 20 as it passes through.

  between laminating rolls 50 and 50 '. The sym-

  Reference Bole C in Figure 4 designates the line

  o Stratification of the strips 20 and 49 occurs.

  With reference to FIG. 3, the strips 29 and 49 then pass between a cutting roll 51 having cutting blades 52 and a backing roll 53. The blades 52 completely cut the strip of conductive material 49 and preferably do not produce a cut in the strip 20. The blades 52 cut the strip 49 into a plurality of series of models 25 and 30, better visible

  in the part designated by D in Figure 5. In reference

  Referring again to Figure 3, this shows a roll 54 composed of a composite web 55 having a continuous coating of pressure-sensitive adhesive 38 and a release liner 56 glued

  separable on the adhesive 38 on the strip 37.

  The release liner 56 is separate from the web 37 and this web 37 passes around a roll 57 provided with sandpaper. From there, the web 37 passes between a pattern-forming roll 58 and a backing roll 59 where masking patterns 39 are deposited on the adhesive 38 to render the adhesive 38 non-sticky on the patterns. masking means 39 to produce adhesive patterns 38 'repeating longitudinally (Figure 1). A masking material from a source 60 is deposited on the pattern-forming roll 58. The masking material of which patterns 23

  and 39 are made up is a printed adhesive inhibitor

  mable and commercially available, for example that sold under the trade designation "Aqua Superadhesive Deadener" by "Environmental Inks and Coating Corp.", Morganton, North Carolina. From there, the web 37 passes partially around a roll 61 and through a dryer 62 where the masking patterns 39 are dried or cooked. The adhesive 38 is rendered non-sticky on the masking templates 39. From there, the

  strips 20, 49 and 37 pass between rolls of

  63 and 64. Figure 5 shows that a strati-

  It is produced along the line E where the strip 37 joins the strip 49. After such a layering, each pattern of adhesive 21 'only coincides with a conductive spiral 25 placed above and each pattern

  adhesive 38 'only coincides with a conductive spiral

trice 30 placed below.

  The strips 20, 37 and 49 pass successively and partially around rollers 65 and 66 and from there, the strip 37 is detached from the strip 20 and passes partially around a roll 67. In place of a take-off the strip 29 is separated into two conductive spiral strips 25 and 30. As shown in FIG. 6, a take-off is produced along the line designated F. When a takeoff or delamination is produced, the conductive spirals 30 adhere to the adhesive templates 38 'on the web 37 and the conductive spirals 25 adhere to the adhesive models 21' on the web 20. As a result, the conductive spirals 30 are arranged in a web and the spirals 25 in the web other band. The web 20 passes partially around rollers 68, 69 and 66 and from there passes between an adhesive deposition roll 71 and a backing roll 72. Adhesive 29 from a source 73 is deposited on the roller 71 which in turn applies a uniform or continuous coating of adhesive 29

  on the strip 20 and on the conductive spirals 25.

  The portion designated G in Figure 6 represents that portion of the strip 20 and conductive spirals 25 which is located between the spaced rollers 66 and 72. The portion designated by H represents the portion of the strip

  between the spaced rollers 72 and 74. In reference

  In Figure 3, the strip 20 passes through a

  dryer 75 where the adhesive 29 is dried. Several, specific

  only two dielectric strips spaced laterally

  28a and 28b, which are wound in the form of

  The strips 76 and 77 are applied on the strip 20 when the strips 20, 28a and 28b pass between the rollers 74 and 74 '. This stratification occurs along the reference line I, indicated in FIG. 6. With reference to FIG. 3, the strip 20 provided with the conductive spirals 25 and the dielectric strips 28a and 28b passes around rollers 78 and 79 and pass between a

  adhesive application roll 80 and a roll of appli-

  81. The roller 80 deposits the adhesive 29 'received in the

  coming from a source 83 on bands 28a and 28b and

  on parts of strip 20 not yet covered.

  From there, the strips 20, 28a and 28b pass through a dryer 84 and partially around a

roller 85.

  The web 37 which has been separated from the web 20 is engaged in the gap between laminating rolls 86 and 87, along a line designated J in Fig. 7, so as to produce

  a composite label strip designated in its

  seems to be 88. Bands 20, 28a, 27b and 37 are strat-

  between rollers 86 and 87 after the spindles

  The conductive ribs 30 have been offset longitudinally with respect to the conductive spirals 25, such that each conductive spiral 30 is aligned or in register with a subjacent conductive spiral 25. The offset may be equal to the pitch of a conductive spiral pattern. as shown in p (FIG. 9), plus the width w of a conductor, or it may be equal to odd multiples of the pitch p plus the width w of a conductor. Accordingly, each pair of conductive spirals 25 and 30 is capable of establishing a detectable resonance circuit by an appropriate circuit of

article surveillance.

  Figure 8 shows the strip 20 and strip 37 which have rotated relative to each other. Figure 9 shows the band 20 and the band. Which have rotated relative to each other by 180 and which have been offset relative to each other so that the conductive spirals 25 and 30 are

  aligned. As shown better in Figure 10, the

  Electrical 28a terminates at a short distance from protuberances 90 resulting from the broaching operation. With this arrangement,

260.4548

  the protuberances 90 do not pass through the dielectric

  28a (or 28b). Figure 10 shows the spirals

  25 and 30 substantially entirely overlapping

  or in alignment with each other, except as indicated at 35 for the conductive spiral 25 and as indicated at 33 for the conductive spiral 30. Each

  circuit is completed by pinning the conductive bars

  27 and 32 with each other, as indicated at 90, or by other appropriate means. The pin 90 is made by four wheels with points 89 which realize

  four pin lines 90 in the composite strip 88.

  The spiked wheels 89 perforate the conductive bars

  these 27 and 32 and therefore lead these conductive strips 27 and 32 in electrical coupling relationship with each other. The composite strip 88 is cut into several narrow strips 91 and 92 by a cutting blade 93 and the excess material 94 is cut by cutting blades 95. The strips 91 and 92 are then cut in their thickness but not until the release liner 24 by blades mounted on a cutting roll 96, unless it is desired to cut the labels T in the form of labels

  separate, in which case band 88 is completely de-

  cut transversely. As indicated, the strips 91 and 92 continue to move and pass around respective rolls 97 and 98 and are wound into coils 99 and 100. As shown in Figure 7, the stitching 90 is made along an line designated by K and the cutting is carried out along a line designated by L. The sheet 37T, the dielectric 28T, the

  sheet 20T and the sheet 24T are respectively

  by cutting of strip 37, strip 28a (or

  28b), the band 20 and the band 24.

  Figure 11 is essentially a reproduction of part of Figure 3, but in addition it represents a pair of coating and drying stations, generally designated 111 and 112 and in which respective coatings 113 and 114, presenting in the form of continuous ribbons, are printed

  and dried. The coating 113 is conductive and is applied

  directly on the pressure-sensitive adhesive 38 on the web 37. The coatings 114 are wider than the respective coatings 113 which they cover so as to provide electrical insulation,

  as shown more clearly in Figures 12 and 13. The

  114 are composed of an activatable material, normally

  maliciously non-conductive. The rest of the process is the same as the process described in relation to the Figures

1 to 10.

  With reference to Figures 14 and 15, those

  ci represent a fragment of the finite label 37T ', where the coatings 113 and 114 were sectioned when the label 37T' was cut off from the label strip as indicated respectively at 113T and 114T. As

  indicated, the coating 113T has a width and a thickness

  It is constant over its length and the coating 114T has a constant width and thickness, but it is wider than the coating 113T. The coating 113T, which is conductive, is therefore electrically insulated from the conductive spiral 30. The coatings 113T and 114T comprise an activatable bond AC which can be activated by subjecting the label to a higher energy level, higher than that making that the

  resonance circuit is detected in a zone of

  terrogation. Figure 16 is essentially a

  reproduction of part of Figure 3, but two

  118 and 119 are adhered to the adhesive 38 on the web 37. The webs 118 and 119 are wound on spaced drums 120 and 121.

  119, unrolled drums 120 and 121, pass partially

  The strips 118 and 119 are spaced from each other and from the side edges of the strip 37. The strips 118 and 119 are of identical construction and each comprise a thin layer. a conductive material 123 such as copper or aluminum placed on a paper layer 123 ',

  a layer for high temperature 124, normally not

  conductive, activatable and containing a conductor and

  a low temperature layer 125, normally not

  conductive, activatable and containing a conductor.

  Layers 124 and 125 contain conductors such

  metal particles or coated carbon.

  The layer 125 is easily fixed when heated, so that a drum heater 115 is positioned downstream of the roller 67 (Figures 3 and 16) and upstream of the rollers 86 and 87 (Figure 3). The heated circuits 30 heat the layer 125 and a bond is formed between the circuits 30 and the layer 125. The rollers 116 and 117 (Figure 16) guide the strip 37 around the drum heater 115. The heating layer 125 has some tendency to suppress the normally nonconductive nature of layer 125 but this is unimportant because layer 124 is not weathered or heat activated

  from the drum heater 115.

  In Figures 19 and 20 is shown a fragment of a finite label 37T ", the strips 118 and 119 having been sectioned so as to have the same

  extended as the label 37T ", as specified in 118T.

  The ribbon 118T cut in the strip comprises the paper layer 123 ', the conductive or conductive layer 123

  and normally non-conductive layers 124 and 125.

  Layers 123, 124 and 125 are shown as having the same width and include an activatable connection

  AC. Both covers 124 and 125 insulate electrical-

  the conductor 123 of the conductive spiral 30.

  In other aspects, the label 37T "is identical to the label 37T and it is produced by the same process as that described for example in connection with

Figure 3.

  The realization of Figure 21 is identical

  FIGS. 16 to 20, except that instead of the strips 118 and 119, there are two strips composed of planar layers, one of which is shown in FIG. 21 and is designated 118 '. The layer 118 'is composed of a strip or layer conductor 126 formed of a conductive material such as copper embedded in a thin coating of a non-conductive material

  The layer 118 'comprises an activatable connection AC.

  As shown in FIG. 21, the upper surface of the coating 127 electrically isolates the conductor 126 from the conductive spiral 30. The layer 118 'is treated,

  in accordance with a specific achievement, starting with

  wearing a motor winding wire, speci-

  No. 8046, obtained from "Belden Company", Geneva, Illinois 60134 USA, having a diameter of about 0.1 mm, an insulating layer having a thickness of about 0.012 mm, and flattening the wire between two rollers in the form of a thin strip having a

  thickness of 0.015 mm. Thus treated, the iso-

  The lant is weakened to a degree that causes a break when the resulting label is subjected to a signal of a sufficiently high energy level. The coating 118 'is therefore referred to as a "breaking liner" because it acts as an insulator when the label is subjected to an interrogation signal at a first energy level, but which no longer acts as an electrical isolator when subjected to a signal of sufficiently high energy level. The conductor 126 therefore acts to short-circuit the inductor when applying the high energy level signal. The embodiments shown in FIGS. 11 to 20 and described in connection with these figures make it possible to detect the label 37T 'or 37T "in an interrogation zone when it is subjected to a high frequency signal corresponding to or close to frequency

  of resonance of the resonance circuit. By increasing suf-

  reliably the energy level of the signal, the coating 114 (or 114T), or 124 and 125, normally non-conducting, becomes conductive to modify the response of the circuit

  of resonance. This result is obtained in a

  specific use by using a normal coating

  non-conductor to establish a short circuit

  between different parts of the conductive spiral 30. When the label is subjected to a high energy level, in the

achievements of Figures 11

  at 15, and 16 to 20, the normally non-conductive coating

  driver becomes conductive and bypasses the inductor.

  As a result, the resonance circuit can no longer resonate at the correct frequency and can not

  not be detected by the receiver in the area of

derogation.

  Although the embodiments illustrated represent the activatable connection AC established by an additional conductor which extends transversely to all the turns of the conductive spiral 30 and by a normally non-conductive material or insulation

  breaking which provides the electrical insulation of the

  relative to the conductive spiral 30, and also extending transversely to all the turns of the conductive spiral 30, the invention should not be

  considered limited by such arrangements.

  By way of non-limiting examples,

  will then give examples of the different

  clothing: I. For the embodiment of Figures 11 to 15 A. Examples of the normally non-conductive coating 114 are as follows: Example 1 Parts by weight powder (E-398-3) of cellulose acetate (CA) 60 acetone 300 Mixing process: Dissolve cellulose acetate powder in acetone with stirring.

dispersion of C.A./cookie

above the C.A. solution

  (16% solids) Copper powder 8620 2.5 Mixing process: Add copper powder to C.A. solution with stirring

  suitable for producing a dispersion of

uniform metallics.

Example 2

  Acryloid B-48N (45% in toluene) 30 Acetone 20 Isopropanol 3 Above solution (25% solids) 10 Copper Powder 8620 5 Mixing Process: Disperse Copper Powder in B-48N Solution (Percent Powder of copper is 60 to 70%, on a

dry weight basis).

  B. Examples of the conductive coating 113 are as follows:

260.4548

  Example 1 Acrylic B-67 Acrylic Weight (45% in Naphtha) 25 Naphtha 16 Silflake Metal Powder

# 237 "42

  Mixing process: Add the powder

  ausolvent and stir. Add the acry-

  Dissolve and shake well to disperse.

  Mix or shake before use.

  (75% to 85% of conductive metal on a base

dry weight).

Example 2

  acryloid NAD-10 (40% in naphtha) 10 metal powder "Silflake

2237 "20

  Process of. mixture: Add the powder to the

  acrylic dispersion with stirring.

  EXAMPLE 3 S & V Water Follicular Ink 11525 (37% Solids) 5 Silflake Metal Powder

: 237 "8

  Mixing process: Add the powder

  aqueous dispersion slowly with appropriate agitation to produce a

* uniform metal dispersion.

  II. For the realization of FIGURES 16 to 20

  A. Examples of low temperature coating

  125 are as follows: Example 1 Parts by weight NAD-10 acrylold dispersion (30% solids) naphtha 2 copper powder 8620 5 Mixing process: Wet the powder

  copper with naphtha and disperse complete-

  is lying. Add the slow dispersion of NAD-10

  with agitation. Mix well or shake before use.

Example 2

polyester resin

(K-1979) 28

  ethanol 10 isopropanol 10 ethyl acetate 20 polyester solution above 10 copper powder 8620 2.5 Mixing process: Add the copper powder to the polyester solution while

  stirring to produce a metal dispersion

  - that uniform (48% copper powder on a

dry weight).

  B. Examples of high temperature coating

124 are:

Example 1

butyrate-cellulose acetate

(C.A.B.) (551-0,2) 40

  toluene 115 ethyl alcohol 21 C.A.B. solution supra

(22.7%) 10

  toluene 2 copper powder 8620 5 Mixing process: wet copper powder with solvent and add the solution

from C.A.B. with agitation.

Example 2

  Acroyloid B-48N (45% in toluene) isopropanol 3 acetone 3 solution (25% solids) 10 copper powder 8620 5 (The percentage of copper is 60 to 70% on a dry weight basis) Mixing process: Add the copper powder to the above solution with stirring

  correct to produce a metal dispersion

uniform.

  The materials used in the above examples may

  can be obtained from the following suppliers: - Acryloid NAD-10, Acryloid B-48N and Acryloid B-67: Rohm & Hass, Philadelphia, Pennsylvania; Cellulose Acetate (E-398-3) and Cellulose Butyrate-Acetate (551-0.2): Eastman Chemical Products, Inc., Kingsport, Tennessee; - Copper 8620: U.S. Bronze, Flemington, New Jersey; Silflake f237: Handy & Harmon, Fairfield, Connecticut; - Krumbhaar K-1979: Lawter International, Inc., Northbrook, Illinois; - Water follicle ink OFG 11525: Sinclair &

Valentine, St. Paul, Minnesota.

  Figures 22 to 25 show a method permitting

  compared with the embodiment of Figures 11 to 15, the embodiment of Figures 16 to 20 and the embodiment of Figure 21. The corresponding method

  Figures 22 to 25 relate to the training of

  resonance circuits which can be deactivated,

  nally spaced and arranged in a band. The longitudinal spacing of the resonance circuits ensures that an electrostatic charge that could prematurely deactivate a resonance circuit in the band can not bow longitudinally in the other resonance circuits in the resonance circuit.

  the band to produce their premature deactivation.

  Where possible, it has been used in

  22 to 25, the same numerical references as in the embodiment of FIGS. 16 to 20 denote components having the same general structure and the same function, the numerical references being however increased by 200. It should be noted that we are

  also refer to Figures 3, 5 and 6.

  Referring initially to Figure 22,

  a strip 249 formed of an electrically conductive material

  ductive and flat is cut into spiral patterns

  400 and 401. The cut-off models include

  side or cross sections of section-

  402. The conductive spirals 400 and 401 are generally similar to the conductive spirals and yet a review of FIG.

  that all the conductive spirals 25 and 30 are

  in close proximity to one another in the longitudinal direction, spaced only by actual cutting lines. In addition, the spirals 25 are interconnected and the spirals 30

  are connected to each other. On the contrary, in the

  22 to 25, only the conductive spirals

  400 and 401 located between adjacent lines

  complete sectioning 402 are interconnected.

  For the process of Figures 22 to 25, reference may be made to

  3, which shows that the conductive spiral strips 20 and 37 are separated when they pass partially around the reel 66, then the strips of dielectric material 28a and 28b are put in place, the strips 20 and 37 are shifted longitudinally. the pitch of a conductive spiral 400 (or 401) plus the width of a conductor, and then the strips 20 and 37 are reapplied against each other when they pass

between the rollers 86 and 87.

  As shown in Fig. 23, once the resonant circuit band A41 has been removed, the resulting band 220 has pairs of resonant circuits 401 which are longitudinally spaced apart.

  one of the other. In the same way, the pairs of cir-

  resonance 400 in the band

  (Corresponding to band 37 of Figure 3)

  are also spaced longitudinally from each other.

  The process corresponding to the realization

  Figures 22 to 25 relate to the production of labels

  skeletons. The arrangement shown for disabling the tag uses the arrangement in the embodiment of Figures 16 to 20 except that the disabling bands 318 and 319 (corresponding to the disabling bands 118 and 119 of Figure 16 for example) are separated under the form of ribbons or

  disabling strips 318 'and 319', spaced longitudinally

  tudinalement. Separation is effected by

  dance with the specific realization depicted on

  Figure 24, punching parts or holes 407.

  in the band 238 and in the deactivation bands 318 and 319. For this purpose, a rotary punch 403 and a rotatable die 404 shown schematically are used. Rotary punch 403 has pins

  405 and the rotatable die 404 has coaxial holes

  The resulting holes 407 are wider than the spacing between the resonance circuits. The holes 407 are therefore in coincidence with the

  edges of the longitudinally spaced resonance circuits

  nally, as shown in Figure 25. Therefore, static electricity can not produce an arc between resonance circuits in a longitudinal direction, and it can not also produce

  an arc between the disabling ribbons 318 '(or 319').

  Of course, the present invention is not limited to the embodiments described and shown; it is capable of many variants accessible to those skilled in the art, depending on the intended applications and without departing from the spirit of the invention.

Claims (2)

  A method of manufacturing labels for use in an electrical article surveillance system, characterized in that it comprises the steps of: forming a first strip (20) comprising a series of   first adhesive models (21 ') repeating themselves longitudinally   secondly, forming a second band (37) comprising a series   second patterns (22 ') of longitudinally repeating adhesive   Cutting a strip (49) of conductive material to form longitudinally repeating pairs of first and second spiral conductors (25, 30) coplanar, contiguous and wound around each other, the first and second strips (20, 37) being positioned   on opposite sides of the strip (49) of conductive material   so that the first adhesive models (21 ') are in contact only with the first conductors (25) and the second adhesive models (22') are in contact only with the second conductors (30), separate the first strip (20) on which are glued the first conductors (25) of the second strip (37) on which the second conductors (30) are glued, then position the first and second conductors (25, 30) in a relative arrangement establishing a capacitive and inductive coupling, and connecting the first and second conductors (25, 30) thus arranged to form a composite strip carrying a series of labels   (19,37T) each having a resonance circuit (25,30).   2. A method of manufacturing labels for use in an electrical article surveillance system, characterized in that it comprises the steps of: forming a strip (49) of conductive material extending   longitudinally, cutting the strip (49) of   ductor to form a plurality of conductive groups.   each group having first and second spiral conductors (25, 30), continuous, coplanar and wound around each other, supporting the first spiral conductors (25) in a first longitudinally extending band of conductors, supporting the second spiral conductors (30) in a second longitudinally extending strip of conductors, separating the first spiral conductor strip (25) and the second spiral conductor strip (30) from each other, shifting the first spiral conductor tape (25)   and the second spiral conductor strip (30)   tudinally relative to each other to bring the first spiral conductors (25) and the second spiral conductors (26) into a relative arrangement establishing a capacitive and inductive coupling, and connect the first and second conductors so arranged   to form a series of labels (19; 37T)   each carrying a resonance circuit (25, 30).   3. A method of manufacturing labels for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a first composite strip (41) having a first strip (20) provided with a coating (21, 22) of pressure-sensitive adhesive and a first release agent-coated backing strip (42), peel off the first backing strip (42) from the first backing strip (42) of the first coated strip (20), depositing a first masking pattern (23) on the adhesive on the first coated strip (20), drying the first masking pattern, applying a strip (49) of conductive material on the first coated strip (20) and against the unmasked adhesive on the first   coating strip (20), cutting the strip of conductive material   to form pairs, repeating themselves longitudinally   first and second spiral conductors (25, 30) coplanar, contiguous and wound around each other and so that the first conductors (25) are glued together . 2604548   on the unmasked adhesive on the first coated strip (20), forming a second composite strip (49) having a second coated strip (37) provided with a pressure-sensitive adhesive coating (38) and a second support strip (56) coated with release agent, peel off the second support strip (56)   of the second coated strip (37), deposit a second   masking (39) on the second coated strip (37), drying the second masking pattern (39), applying the second coated strip (37) to the strip of conductive material (49) with the non-adhesive masked on the second coated strip (37) coinciding with the second conductors (30), separating the first strip   coating (20) on which the first   ductors (25) of the second coated strip (37) on the   the second conductors (30) are bonded, depositing adhesive on the first coated strip (20), drying the deposited adhesive on the first coated strip which has been coated again, applying a strip of dielectric material (28a , 28b) on the first band   which has been re-coated, deposit adhesion   on the strip of dielectric material (28a, 28b), dry (84) the adhesive on the strip of   dielectric material (28a, 28b), to laminate   cation (78, 79, 80, 81, 86, 87) of the first and second coated strips (20, 37) with each other and with   interposition between them of the strip of dielectric material   (28a, 28b) to form a strip of labels   composite, the stratification step comprising a   first and second coated strips (20, 37).   longitudinally to bring the first and second   drivers (25, 30) in a relative provision   coupling a capacitive and inductive coupling and a pinning (90) of the first and second conductors (25, 30) thus arranged to form a series of connected tags (37T ') each having a resonance circuit (25, 30).   4. A label usable in an electronic article surveillance system, characterized in that it comprises: a dielectric (38) planar in the set, first and second reverse spiral conductors (25, 30) positioned in a relationship of capacitive and inductive coupling on opposite sides of the   dielectric (38), means (90) for electrically connecting   first and second conductors (25, 30) so as to form a resonance circuit, and in that the first and second conductors (25, 30) have inverted shapes made by cutting a conductive plane material (49). ) in a spiral pattern so as to form   pairs of first and second reverse conductors con-   gus and to position a pair of first and second drivers in said relationship.   5. A method of manufacturing a deactivatable label for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a resonance circuit (25, 30) responsive to the reception of a signal of a first energy level for emitting an alarm signal to indicate the presence of the resonance circuit in an interrogation zone, the circuit comprising an inductor   (25) having a spiral conductor, forming a conductor   the additional driver (30) and to position the   adjacent the spiral conductor (25) while electrically isolating the additional conductor (30) from the   spiral conductor (25) by a normally non-material   conductive (114; 124, 125), which can be made conductive   trice to deactivate the label (37T) in response to a second energy level signal whose energy level is higher than that of the aforementioned first energy level signal. 6. A method of manufacturing a deactivatable label for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a resonance circuit (25, 30) responsive to the reception of a signal a first energy level for emitting an alarm signal to indicate the presence of the resonance circuit in an interrogation zone, the circuit comprising an inductor (25) provided with a spiral conductor (30), to apply a   first coating (126) on at least a portion of the   spiral conductor (30), the first coating being normal-   non-conductive but can be made conductive in response to a second energy level signal whose energy level is higher than that of the aforementioned first energy level signal, andapplying a second conductive coating (127) on the first coating (126) in electrical insulation relation to the spiral conductor (30) so that, when   receiving the second energy level signal, the first   The first coating becomes conductive and the second coating is thus electrically coupled with the conductor to modify the characteristics of the inductor to prevent an emission of the alarm signal. 7. A method of manufacturing a deactivatable label for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a resonance circuit (25, 30) responsive to the reception of a signal of a first energy level for emitting an alarm signal to indicate the presence of the resonance circuit in an interrogation zone, the circuit comprising an inductor (25) provided with a spiral conductor (30) comprising a plurality of turns, creating a short circuit between two turns of the spiral conductor (30), the step of creating the short circuit comprising the step of isolating the two turns relative to one another by means of a normally non-conductive material (114, 124, 125), which may be made conductive to short-circuit the inductor in response to receiving a second level energy signal whose energy level is higher than the first level signal aforementioned energy. 8. A method of manufacturing a deactivatable label for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a resonance circuit (25, 30) responsive to the reception of a signal a first energy level for emitting an alarm signal to indicate the presence of the resonance circuit in an interrogation zone, the circuit comprising an inductor (25) provided with a spiral conductor (30) comprising a plurality of turns, creating a short circuit between two turns of the spiral conductor (30), the step of creating the short circuit comprising the step of applying a first coating (126) on at least a portion of one of the turns, the first coating (126) being normally non-conductive but conductive in response to a second energy level signal having a higher energy level than the signal   first level of energy mentioned above, and to apply a   cond conductive coating (127) between the two turns and on the first coating (126) so that a   receiving the second level energy signal by the   the conductor is short-circuited and that the characteristics of the inductor are   prevent a transmission of the alarm signal.   9. A method of manufacturing a deactivatable label for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a resonance circuit (25, 30) responsive to the reception of a signal from a first 260.4548   energy level for emitting an alarm signal to indicate the presence of the resonance circuit in an interrogation zone, the circuit comprising an inductor   provided with a spiral conductor (30) having a plurality   coil, and positioning a strip of conductive material adjacent to one of the spiral conductors (30), the strip of conductive material having a layer of a normally non-conductive material (114; 125,126) electrically insulating the strip of material conductive relative to the spiral conductor (30) but this normally non-conductive material (114; 125,126) being conductive in response to a second energy level signal having a higher energy level than the signal first level of energy mentioned above in order to   modify the characteristics of the inductance for.   prevent a transmission of the alarm signal. -   10. A method of manufacturing a deactivatable label for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a first strip (20) having a first series of first spiral conductors (25); ) and a second band (37) having a series of second spiral conductors (30), forming a strip of conductive material (123) having a layer of normally non-conductive material (124, 125), positioning the strip of conductive material ( 123) with the normally non-conductive material layer (124,), adjacent to either the first series or the second series of conductors, to bond the first and the second   (20, 37) against each other, connect the conductors   first and second strips together to form a series of resonance circuits (25, 30) in a composite strip, separating the composite strip   in labels (37T) each comprising a first con-   conductor (25) and a second conductor (30) which are coupled to each other, the normally non-conductive layer (124, 125) being conductive in response to an energy level higher than the level required for the activation of the label.   11. A method of manufacturing a deactivatable label for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a first strip (20), printing a conductive material on the first strip (20), printing a non-conductive material (114) on the conductive material on the first web (20), forming a second web (37), first and second spiral conductors (25, 30) being disposed between first and second strips (20, 37), bonding the strips (20, 37) to one another with pairs of the first and second spiral conductors (25, 30) connected to form resonance circuits, and in that that matter normally   non-conductor (114) can be made conductive   response to a level of energy higher than the level required   for the activation of the label, and in that the strips (20, 37) are separated for labels   (37T) each having a deactivatable circuit (15, 30).   12. A method of manufacturing a deactivatable label for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a resonance circuit (25, 30) responding to a reception of a first energy level signal for emitting an alarm signal to indicate the presence of the resonance circuit in an interrogation zone, the circuit comprising an inductor provided with a spiral conductor (30), and establishing a connection activatable (AC) with the spiral conductor (30),   this connection comprising a material containing a   conductor, normally non-conductive and which can be made conductive in response to a second energy level signal having a higher energy level   to that of the above-mentioned first-level energy signal.   13. Switchable label usable in a   electronic article surveillance system, which is   characterized in that it comprises: a support, a resonance circuit (25, 30) .posited on the support, the resonance circuit responsive to the reception of a first energy level signal for outputting a signal alarm in order to indicate the presence of the resonance circuit (25, 30) in an interrogation zone, the resonance circuit comprising a spiral conductor (30), a deactivation conductor adapted to connect spaced portions of the spiral conductor one with the other, a normally non-conductive material (114; 121, 125) electrically isolating the deactivating conductor of at least   part of the spiral conductor 30, and in that   the normally non-conductive circuit (114; 124,125) can be made conductive to deactivate the resonance circuit in response to a second energy level signal having an energy level greater than   first energy level signal mentioned above.   14. A method of manufacturing a deactivatable label for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a resonance circuit (25, 30) responsive to a reception of a a first energy level signal for transmitting an alarm signal to indicate the presence of the resonance circuit (25, 30) in an interrogation zone, and positioning an insulated conductor (118 ') having a cutoff coating thereon contact   with the circuit to deactivate the label (37T) in   response to a second energy level signal having a higher energy level than the first level signal aforementioned energy.   15. Switchable label for use in   an electronic article surveillance system,   characterized in that it comprises: a support, a cir-   resonance circuit (25, 30) on the carrier, the resonance circuit (25, 30) responsive to receiving a first energy level signal for emitting an alarm signal to indicate the presence of the resonance circuit (25, 30) in an interrogation zone, the resonance circuit comprising a spiral conductor (30)   provided with turns, a ribbon of normally   conductive (114; 124,125) insulated from both turns by the normally non-conductive material and that the normally non-conductive material (114; 124,125) can be made conductive to deactivate the resonant circuit (25,30). response to a signal of second level of energy which is higher than that of the signal first level of energy.   16. Switchable label for use in   an electronic article surveillance system,   characterized in that it comprises: a support, a cir-   resonance circuit (25, 30) placed on the support, the resonance circuit (25, 30) being responsive to receiving a first energy level signal for emitting an alarm signal to indicate the presence of the resonance circuit (25, 30) in an interrogation zone, the resonance circuit comprising a spiral conductor (30), means for altering the signal emitted by the resonance circuit in order to prevent detection of the presence   of the circuit in the interrogation zone, the means of   signal system comprising a normally   conductor (114; 124,125) connected to the spiral conductor (30) and in that the normally non-conductive material can be made conductive in response to a second energy level signal whose energy level is   higher than that of the first energy level signal.   17. Switchable label for use in   an electronic article surveillance system,   characterized in that it comprises: a support, a cir-   resonance circuit (25, 30) on the carrier, the resonance circuit (25, 30) responsive to receiving a first energy level signal for emitting an alarm signal to indicate the presence of the resonance circuit (25,30) in an interrogation zone, and an insulated conductor (118I ') having a clipping coating and in contact with the circuit for disabling the tag in response to a second energy level signal whose energy level is higher than that   the first level energy signal.   18. Method of manufacturing labels used   sands in an electronic article surveillance system, characterized in that it comprises the steps of: forming a first web (20) comprising a series of first patterns of repeating adhesive (21 ')   longitudinally, forming a second band (37) comprising   as a series of second patterns (22 ') of longitudinally repeating adhesive, cutting a strip (49) of conductive material to form longitudinally repeating pairs of first and second coplanar, contiguous, spiral conductors (25, 30) and wound up one   around the other, the cutting step including the operation   ration of complete sectioning of each pair by   port to the longitudinally adjacent pair, the first and second strips (20, 37) being positioned on opposite sides of the strip (49) of conductive material so that the first patterns of adhesive (21 ') are in contact only with the first conductors (25) and the second adhesive models (22 ') are in contact only with the second conductors (30), separating the first strip (20) on which are bonded the first conductors (25) of the second strip (37) on which the second conductors (30) are bonded, then positioning the first and second conductors (25, 30) in a relative arrangement establishing a capacitive and inductive coupling, each group of first and second conductors being spaced apart from each adjacent group first and second conductors, forming a   separate deactivator (118,119; 318,319) for each   groups, the deactivators (118,119; 318,319) being   longitudinally spaced apart and each deactivator   as an electrically conductive material, connecting the corresponding first and second conductors so as to form a composite label strip consisting of a series of labels (37T) each having a   resonance circuit (25, 30), and in that a deactivation   accidental operation of a resonance circuit (25,30) in the composite label strip does not produce a   deactivation of any other circuit of reso-   nance spaced longitudinally from it in the composite label tape.   19. Process for the manufacture of labels   in an electronic article surveillance system, characterized in that it comprises the steps of: forming a first band (20) comprising a series of first patterns of repeating adhesive (21 ')   longitudinally, forming a second band (37) comprising   as a series of second patterns (22 ') of longitudinally repeating adhesive, cutting a strip (49) of conductive material to form longitudinally repeating pairs of first and second coplanar, contiguous, spiral conductors (25, 30) and wound up one   around the other, the cutting step including the operation   ration of complete sectioning of each pair by   longitudinally adjacent pair, supporting the first spiral conductors in a first longitudinally extending conductor strip, supporting 260.4548   the second spiral conductors in a second longitudinally extending strip of conductors, separating the strip of first spiral conductors and the strip of second spiral conductors from each other, shifting the strip of first spiral conductors and the strip of second conductors spirals longitudinally relative to one another to bring the first spiral conductors and the second spiral conductors into a relative arrangement establishing a capacitive coupling   and inductive, each group of first and second   being spaced apart from each adjacent group of first and second conductors, forming a separate deactivator (118, 119, 318, 319) for each of said groups,   deactivators (118,119; 318,319) being spaced longitudinally   tudinalement and each deactivator (118,119; 318,3195 comprising a first and a second conductor to form   a series of labels (37T) each containing a cir-   baked resonance (25, 30), and in that a deactivation   accidental circuit of a resonance circuit (25, 30) is   in the composite label strip does not deactivate any other resonance circuit spaced longitudinally thereof in the strip composite labels.   20. A process for manufacturing a deactivatable label that can be used in an electronic article surveillance system, characterized in that it comprises the steps of: forming a first strip (20) comprising a first series of first spiral conductors (25)   longitudinally spaced apart and a second band (37)   carrying a series of longitudinally spaced second spiral conductors (30) forming spaced apart ribbons (118, 119) of conductive material having a layer of normally non-conductive material (114; 125, 126), positioning the ribbons so that the layer   normally non-conductive (114; 125, 126) is   at the first or second series of conductors, glue the first and second strips (20, 37) one over the other, connect the conductors of the first and second strips (20, 37), one with the other for forming a series of resonance circuits spaced apart in a composite strip, one of said strips being associated with each resonance circuit, separating the composite strip   in labels (37T) each comprising a first lead   driver and a second driver who are coupled with each other   the other, and that the normally non-conductive   trice (114; 125, 126) can be made conductive in   response to a level of energy higher than the level required   for the activation of the label.   21. A method of manufacturing a deactivatable label for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a first band (20)   extending longitudinally, to print a material con-   ducting on the first web (20), printing a non-conductive material (114) on the conductive material placed on the first web (20), creating discontinuities in the conductive material and in the non-conductive material printed thereon creating longitudinally spaced strips, forming a second web (37), forming longitudinally spaced pairs of first and second spiral conductors positioned between the first and second webs (20, 37), adhering webs (20, 37); one on the other with pair connection of the first and second spiral conductors (25, .. 30) to create spaced apart resonance circuits, with a ribbon in contact with each circuit but not in contact with another circuit, in that the normally non-conductive material (114; 125,126) can be made conductive in response to an energy level higher than the level necessary for activation of the label (37T), and separate the strips (20,37). ) to form labels (37T) comprising   each a deactivatable circuit (25, 30). * To.2604548   22. A method of manufacturing deactivatable labels for use in an electronic article surveillance system, characterized in that it comprises the steps of: forming a longitudinally extending band of resonance circuits (25, 30) longitudinally spaced, forming a continuous, longitudinally extending web of a quencher, and separating the quencher strip into a series of ribbons   longitudinally spaced apart, each ribbon being   dence with a resonance circuit (25, 30) and not   not in contact with any other resonance circuit.