WO2002033370A1 - Dispositif de marquage susceptible de faire apparaitre une obliteration et son procede de fabrication - Google Patents
Dispositif de marquage susceptible de faire apparaitre une obliteration et son procede de fabrication Download PDFInfo
- Publication number
- WO2002033370A1 WO2002033370A1 PCT/FR2001/003255 FR0103255W WO0233370A1 WO 2002033370 A1 WO2002033370 A1 WO 2002033370A1 FR 0103255 W FR0103255 W FR 0103255W WO 0233370 A1 WO0233370 A1 WO 0233370A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- porous support
- inscription
- temperature
- ink
- substance
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/06—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using melting, freezing, or softening
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/02—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
- G01K3/04—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values in respect of time
Definitions
- the present invention relates to a marking device capable of revealing an obliteration after a predetermined period of time and its manufacturing process.
- the invention relates generally to the obliteration of a product by an inscription which appears legibly and irreversibly, after a predetermined period of time, when this product is brought above a predetermined temperature.
- the invention applies in particular, but not limited to, the marking of fiduciary documents, that is to say documents presenting information and having a certain intrinsic market value.
- documents that is to say documents presenting information and having a certain intrinsic market value.
- tickets transport, restaurant, holiday vouchers, show
- postage postage
- tax stamps banknotes.
- Document FR 2 739 687 already discloses a device making it possible to reveal whether an object has been exposed to a temperature above a predetermined temperature.
- This device comprises a support, a substrate deposited on this support and a pattern printed in ink on said substrate.
- this support When this support is exposed to a temperature higher than the melting temperature of the substrate, the latter liquefies and dilutes the ink of the printed pattern. Consequently, said pattern appears in a fuzzy form with imprecise contours.
- the information delivered to the consumer is not clear because the consumer does not know exactly if the pattern was improperly printed from the start or if its readability changed later.
- Document FR-2 623 622 also discloses a device for controlling a possible heating of a product and for recording such a possibility for irreversible marking.
- This device comprises an active substance having a liquid-solid transition point at a predetermined temperature, a support made of absorbent material capable of being marked by said active substance when it is in liquid form and an envelope at least partially transparent and enclosing the all.
- the active substance When the temperature exceeds the value of the transition point, the active substance liquefies and wets the absorbent support. The coloring reaction appears in the form of a spot visible through the envelope.
- this document does not disclose the possibility of making a legible marking inscription appear on a support, if the latter is brought above a given temperature, but simply the possibility of forming a task. Furthermore, this document also does not provide for the possibility of obliterating information, that is to say at least partially overlapping an impression initially present on the support with an inscription appearing on this support beyond of a predetermined temperature.
- the object of the present invention is to provide a means of obliterating, with the aid of an irreversible and legible indication, a product which has been exposed voluntarily or not, to a temperature higher than a predetermined temperature.
- This object is achieved by means of a marking device capable of revealing an obliteration after a predetermined period of time.
- This device is remarkable in that it comprises a porous support having at least one impression on its front and at least one inscription applied on its back substantially opposite said impression, this inscription being produced using an ink consisting of a mixture comprising at least one type of pigment and at least one first substance having a melting temperature Tfi, in that this inscription is invisible at least on the front of said porous support as long as the latter is maintained at a temperature below said melting temperature Tfi and in that this inscription crosses said porous support to appear legibly and irreversibly on the front of said support, at least partially overlapping said print, after a predetermined period of time, if this support is brought to a temperature higher than the melting temperature Tfi of said first substance.
- the ink also comprises at least one second substance which further delays the migration of the mixture consisting of the pigment and the first substance having a melting temperature Tfj, through the porous support, so that the inscription appears on the front of said porous support when the latter is brought to a temperature higher than the melting temperature Tfi, but with an additional delay compared to the moment when said porous support is brought to this higher temperature,
- the second substance delaying migration is a substance having a melting temperature Tf 2 greater than Tfi
- the ink constituting the inscription comprises a heavy solvent and this inscription is invisible at least on the front of said porous support as long as it is kept for a period of time less than a predetermined duration and this inscription crosses said porous support to appear legibly and irreversibly on the front of said support, beyond this predetermined duration, even if a temperature above the melting temperature Tfi is not reached,
- the first or second substance is an aqueous solution, an alcohol-based solution or a fatty substance
- said print is capable of being read by an appropriate reading machine, and it becomes illegible by said reading machine when the inscription has passed through said porous support to appear on the front thereof,
- the porous support also has on its front, a reversible ink impression which appears only when said porous support is at a given temperature or within a given range of temperatures,
- the back of the porous support has a self-adhesive strip
- the porous support is a paper, a cardboard, a fabric, a porous plastic film or a porous masking tape affixed to a non-porous product.
- the porous support is a stamp, a bank note, a ticket, a show ticket, a label or a packaging.
- the invention also relates to a method of manufacturing the aforementioned device, remarkable in that it comprises the steps consisting in: - applying the ink constituting the inscription on the back of a porous support, at a higher temperature at the value of the melting temperature Tfi, Tf n, the highest of all the hot-melt substances constituting said ink, so that the latter is liquid,
- the method comprises the additional step of laminating a self-adhesive strip on the back of said porous support, at a temperature below the value of said lowest temperature Tfi of all the hot-melt substances constituting said ink.
- FIGS. 1 and 2 are schematic perspective views of the device according to the invention respectively before and after it has been exposed to a temperature above a predetermined temperature
- FIG. 3 is a perspective view of an alternative embodiment of the device according to the invention.
- FIG. 4 is a sectional view of the device shown in Figure 1 but provided with a self-adhesive film
- - Figures 5 and 6 are diagrams illustrating a stamp, before and after it has been exposed to a temperature higher than a predetermined temperature
- FIGS. 7 and 8 are diagrams illustrating a transport ticket having a bar code, before and after it has been exposed to a temperature above a predetermined temperature
- FIGS 9 to 11 are diagrams showing a package with the device according to the invention and a reversible ink marking, during exposure to different temperatures.
- the marking device comprises a porous support 1 having a front side 10 and a back side 11.
- the porous support 1 is for example paper, cardboard, fabric or a porous plastic film, such as those used for the manufacture of stamps, tickets, show tickets, banknotes, labels, packaging or, in general, any document that may require cancellation.
- the front 10 of this porous support 1 has an impression, as will be described later. However, for the sake of simplification, the front 10 is shown blank in FIGS. 1 and 2.
- an inscription 2 is applied to the back 11 of said porous support 1.
- This inscription 2 is produced using an ink consisting of a mixture comprising at least one type of pigment and at least one first substance having a temperature Tfj fusion, stable and known.
- melting temperature means the temperature below which a substance is in the solid state and above which this substance is in the liquid or gaseous state, l viscous state being considered as a liquid state. More specifically, this substance is chosen according to the applications envisaged. It may, for example, be an aqueous solution, such as a sodium chloride solution, an alcohol-based solution or a fatty substance, such as paraffin or a composite fat.
- the porous support 1 is at a temperature below the melting temperature Tfi and the inscription 2 is in the solid state, invisible on the front 10 of said support.
- Tfi melting temperature
- the porous support 1 is at a temperature higher than the melting temperature Tfi and the ink constituting the inscription 2 has passed into the liquid state and has migrated through the porous support 1 to appear on the front 10.
- This inscription 2 appears legibly and moreover is irreversible since the porous support 1 is impregnated over its entire thickness as can be seen in FIG. 2.
- legible inscription means an inscription whose contours appear clearly, excluding spots or burrs, this inscription being able to be composed of one or more symbols, set of numbers and / or letters, Iogo (s), or drawing (s) or any other figurative or semi-figurative or directly intelligible sign.
- the substance in which the pigments are found melts very quickly and therefore passes quickly through said support. If on the other hand, the temperature applied to the support 1 is only very slightly higher than Tfi (by a few degrees), then the substance in which the pigments are found becomes only viscous and crosses said support more slowly.
- the inscription 2 appears progressively on the front 10 over a longer period of time. In addition, the pigments are drawn towards the front 10 as the substance in which they are found, crosses the porous support 1. Consequently, the inscription 2 will appear of an increasingly dark color during of time, as the pigments accumulate on the front 10 of said support 1.
- the intensity of the colors therefore indicates that the porous support 1 has exceeded Tfi for a short period of time or on the contrary, for a longer period.
- the intensity of the inscription 2 can be compared to a standard color preset and printed on the front 10 of the support 1.
- the porous support can consist of a porous masking strip referenced 1 ', having a front face 10' and a back face 11 'to which is applied the inscription 2, this masking strip being affixed to a non-porous product 3.
- This masking tape l ' is generally of a first solid color and when the non-porous product 3 is brought to a temperature higher than the melting temperature Tfi of the ink constituting the inscription 2, the latter appears on the front 10 'of said masking strip 1' in a second color contrasting with the first color.
- This masking strip 1 ′ is for example a varnish containing titanium or a product based on kaolin.
- the back 11 of the porous support 1 has a self-adhesive strip 4 provided with a protective film 5 which can be separated from the strip 4 by traction. This variant applies particularly to the case where the porous support 1 is a label.
- the front 10 of the porous support 1 has an impression generally referenced 7, this impression constantly appearing on said front 10, whatever the temperature at which the porous support is 1.
- this impression 7 may consist of a design or an image such as that appearing on a stamp or a bank note, but also by a bar code or an authentication code, a logo, a series of letters or any other figurative sign or semi-figurative or directly intelligible appearing on a show ticket, a transport ticket, a label or a packaging.
- the inscription 2 appears on the back 11 of the support 1 substantially opposite printing 7 and it will appear on the front 10 of said support 1, at least partially overlapping said printing 7, if the support 1 is brought to a temperature higher than Tfi , as previously explained.
- FIGS 5 and 6 illustrate an example of application of the invention to the cancellation of stamps.
- FIG. 5 illustrates a stamp 1, as it is marketed, ready to be stuck on an envelope. This stamp has on its front 10, an impression
- FIG. 6 illustrates this same stamp 1, glued to an envelope 6 (partially shown in this figure), after it has passed through a thermal obliteration machine which brings the envelope and the stamp to a temperature higher than the melting temperature Tfi of the ink used for the inscription 2. The latter then appears on the stamp at least partially overlapping the impression 7A, that is to say in the present case, the vertical line corrugated.
- an ink is chosen whose melting temperature Tfi is close for example to 60 ° C., or even even to 80 ° C. Under normal stamp storage conditions, this temperature is never reached. Subsequently, the cancellation is simple to implement, since it only requires the use of a thermal cancellation machine, heating the stamp for a very short period, for example in the aforementioned case to more than 60 or 80 ° C.
- a stamp thus canceled can only be used once, whereas with a conventional cancellation using an ink pad, the ink marking can be washed or the ink pad can be applied next to the stamp inadvertently, which allows its reuse. Finally, if a counterfeiter is content to photocopy a sheet of stamps, he will only reproduce impression 7 A and not inscription 2 and the falsified stamps will be unusable.
- FIGS. 7 and 8 illustrate an example of application of the invention to the obliteration of a support 1, of the transport ticket, show ticket, label or product packaging type allowing the identification and / or the invoicing of said product.
- the print referenced 7B is advantageously a specific indication such as a bar code or an authentication of product (number, code) capable of being read by an appropriate reader, the latter being able to be as well a machine, such as 'a barcode reader or a human being.
- the printing 7B is a bar code and the inscription 2 a series of crosses.
- the porous support 1 is brought to a temperature higher than the melting temperature of the inscription 2, the printing 7B and the inscription 2 appear simultaneously on the front 10 of the support 1 overlapping (see Figure 8). In this particular case, this has the effect of making the 7B print illegible by a barcode reader and this, irreversibly.
- FIGS 9 to 11 illustrate another example of application of the invention in the case of food products.
- the porous support 1 is for example a label affixed to a food product packaging.
- the front side 10 of this support first of all carries a series of ink 8 prints, permanent whatever the temperature at which this support is found. This is for example the price, indications of source of the product or the brand thereof.
- the porous support 1 also has a specific impression referenced 7C of the barcode type.
- the front side 10 of this support 1 can also include a reversible ink printing 9 which appears only when the label 1 affixed to the packaging (and therefore the product contained in this packaging) is at a given temperature or in a given range of temperatures (Ti to T 2 ). This impression 9 indicates for example that the product has reached an ideal tasting temperature.
- the label 1 then appears as shown in FIG. 10.
- Such an indication is reversible, that is to say that it disappears when the product is returned to the refrigerator and therefore returns to a temperature below Ti or when it reaches a temperature above T 2 which exceeds the temperature.
- ideal for consumption For example, for fresh products, the temperature range Ti to T 2 will vary from 12 to 18 ° C.
- the back side of the support 1 comprises an inscription 2 produced using an ink as mentioned above but also comprising at least one second substance delaying the migration of the mixture (pigment - first substance) mentioned above, through the support porous 1.
- This second substance with retarding effect is for example a solvent or advantageously, a substance having a second melting temperature Tf 2 higher than T i.
- the porous support 1 When the porous support 1 reaches a temperature higher than Tfi, the first substance having the melting temperature Tfj begins to liquefy while the second substance having the melting temperature Tf 2 still remains at solid state. Consequently, the inscription 2 does not appear on the front immediately, because the second solid substance slows down the crossing of the support 1 by the first substance, by reducing the porosity of the latter. Gradually over time, and if the temperature continues to be above Tfi, which is the case when a fresh product is left at room temperature, the second substance will gradually be dissolved by the first.
- the inscription 2 indicating for example that the food product has become unfit for consumption because it has been staying too long outside the refrigerator, appears on the front 10 of the porous support but with a delay. As illustrated in FIG. 11, this inscription 2 appears opposite the bar code 7C, so as to make it impossible to read it and to prohibit the invoicing of the product bearing the label if the disclosure of this inscription 2 took place before the checkout of said product.
- the product and label 1 reach a temperature higher than Tfi but for a very short time (if the product is removed for a few moments from the refrigerator, for example) then the first substance does not have time to dissolve the second substance and the inscription 2 does not appear.
- the two substances used in this case are for example fatty substances, such as paraffins or composite fats, the first of which at a melting temperature Tfi for example close to 25 ° C. and the second of which at a melting temperature Tf 2, for example close to 50 ° C.
- the respective percentage of the two fatty substances in the ink makes it possible to adjust the time after which the inscription 2 will appear if the temperature remains above Tfi.
- the aforementioned inks can comprise a heavy solvent (ie a solvent of which the evaporation time is very slow, such as benzene, for example) which will cause the pigments to migrate through the porous support 1 and therefore the appearance of the inscription 2 on the front 10 of the support beyond a duration predetermined, even if the melting temperature Tfi is not exceeded. In the case of a food product, this period will correspond to the shelf life of the product, beyond which the product becomes unfit for consumption.
- a heavy solvent ie a solvent of which the evaporation time is very slow, such as benzene, for example
- such a heavy solvent has a synergistic effect with the aforementioned inks.
- this heavy solvent accelerates the migration of the ink.
- the invention also relates to a method of manufacturing the abovementioned cancellation device.
- This process consists in a first step of applying the ink in the form of an inscription 2 on the back 11 of the porous support 1, at a temperature above the melting temperature of said ink, so that the latter is in the liquid state.
- the melting temperature to be taken into account is either the value of the melting temperature Tfi in the case of the ink according to the first embodiment which contains a single hot-melt substance, or the value of the melting temperature Tf n the most high of all the hot-melt constituents of the ink in the case of an ink comprising a mixture of several substances having different and increasing melting temperatures from Tfi to Tf poll.
- the temperature of the porous support 1 and of the air in the vicinity thereof is lowered, to a temperature below the value of the lowest melting temperature of all the hot-melt constituents of the ink, that is to say less than T i.
- the ink is thus frozen and cannot pass through the porous support 1.
- the support 1 is provided with a self-adhesive strip 4, this is then applied at this stage of the process.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01980612A EP1328783A1 (fr) | 2000-10-20 | 2001-10-19 | DISPOSIFF DE MARQUAGE SUSCEPTIBLE DE FAIRE APPARAITRE UNE OBLITéRATION ET SON PROCéDé DE FABRICATION |
AU2002212415A AU2002212415A1 (en) | 2000-10-20 | 2001-10-19 | Marking device capable of revealing a cancellation and method for making same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR00/13457 | 2000-10-20 | ||
FR0013457A FR2815571B1 (fr) | 2000-10-20 | 2000-10-20 | Dispositif de marquage susceptible de faire apparaitre une obliteration et son procede de fabrication |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002033370A1 true WO2002033370A1 (fr) | 2002-04-25 |
Family
ID=8855555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/003255 WO2002033370A1 (fr) | 2000-10-20 | 2001-10-19 | Dispositif de marquage susceptible de faire apparaitre une obliteration et son procede de fabrication |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1328783A1 (fr) |
AU (1) | AU2002212415A1 (fr) |
FR (1) | FR2815571B1 (fr) |
WO (1) | WO2002033370A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE525776C2 (sv) * | 2003-09-16 | 2005-04-26 | Henry Norrby | Förpackning för förvaring av varor i ett preserverande tillstånd samt förfarande för förfärdigande av dylika förpackningar |
US8091503B2 (en) * | 2009-08-27 | 2012-01-10 | Xerox Corporation | Label configured to indicate an object reaching a predetermined temperature |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2623622A1 (fr) * | 1987-11-24 | 1989-05-26 | Izoard Patrick | Dispositif pour le controle d'un eventuel rechauffement d'un produit et pour l'enregistrement par un marquage irreversible d'une telle eventualite |
DE29519624U1 (de) * | 1995-03-28 | 1996-03-28 | Aust, Peter, 60437 Frankfurt | Indikator zum Nachweis der Unterbrechung von Kühlketten |
FR2739687A1 (fr) * | 1995-10-06 | 1997-04-11 | Sequoia Expertise | Dispositif permettant de reveler si un objet a ete expose a une temperature superieure a une temperature predeterminee et procede de realisation d'un tel dispositif |
-
2000
- 2000-10-20 FR FR0013457A patent/FR2815571B1/fr not_active Expired - Fee Related
-
2001
- 2001-10-19 AU AU2002212415A patent/AU2002212415A1/en not_active Abandoned
- 2001-10-19 EP EP01980612A patent/EP1328783A1/fr not_active Withdrawn
- 2001-10-19 WO PCT/FR2001/003255 patent/WO2002033370A1/fr not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2623622A1 (fr) * | 1987-11-24 | 1989-05-26 | Izoard Patrick | Dispositif pour le controle d'un eventuel rechauffement d'un produit et pour l'enregistrement par un marquage irreversible d'une telle eventualite |
DE29519624U1 (de) * | 1995-03-28 | 1996-03-28 | Aust, Peter, 60437 Frankfurt | Indikator zum Nachweis der Unterbrechung von Kühlketten |
FR2739687A1 (fr) * | 1995-10-06 | 1997-04-11 | Sequoia Expertise | Dispositif permettant de reveler si un objet a ete expose a une temperature superieure a une temperature predeterminee et procede de realisation d'un tel dispositif |
Also Published As
Publication number | Publication date |
---|---|
EP1328783A1 (fr) | 2003-07-23 |
FR2815571A1 (fr) | 2002-04-26 |
AU2002212415A1 (en) | 2002-04-29 |
FR2815571B1 (fr) | 2003-07-04 |
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