KR20010051211A - Secure holographic images on cardboard - Google Patents

Abstract

PURPOSE: To repeatedly give hidden hologram on a card board material which is used for accommodating various kinds of elements by a method being excellent in cost effect. CONSTITUTION: A card board base has an adhesive layer and a metallized holography image, the metallized holography image contains at least two holograms and one hologram can be seen only by incoherent light and another hologram can be seen only by coherent light. The holography image is formed on a photosensitive element on a high polymer base by an image forming step and the image forming step contains metallization of the holography image and overcoating of the holography image with the adhesive layer. Then the metallized holography image is transferred onto the card board by laminating the adhesive layer on the card board at prescribed temperature and pressure, then laminating and stripping the high polymer base from the card board to leave the holography image on the high polymer base in order to be reused.

Description

Stable holographic image on cardboard {SECURE HOLOGRAPHIC IMAGES ON CARDBOARD}

FIELD OF THE INVENTION The present invention relates to certain holographic images that are formed to provide stability when viewed in a particular state, and more particularly to a process of multiple transference of such images onto a cardboard. will be.

Related technology

This Provisional Patent and the invention contained therein are related to US Patent Nos. 5,662,986, 5,766,734, 5,735,989, and 5,900,095, some of which are already filed with the applicant. to be. This provisional patent has been applied to two other co-pending provisional patents MS-700-Prov. And MS-800-Pprov.

Holographically enhanced materials are well known in the art, and these materials have been described fully in the patent literature described above, which has already been filed and patented by the applicant. These materials relate to numbers used to enhance articles that are combined with, for example, packaging cardboard, cardboard, cardboard boxes and the like. In addition, holographically enhanced images can be used for credit cards or the like to provide stability because of the difficulty of reproducing the image. The production of holographic images is a well known process but has not been widely used by the applicant's unique invention until the multiple transfer treatment of the metal treated image onto an alternative support. A particular new support is a tissue support, and therefore the tissue support cannot be promoted by the holographic image because the support is too fragile. These elements and processes are well described in the related patents mentioned above. The manufacture of holographic materials is also fully described by Unterseher et al. In various references in California, Berkeley, Ross Book, 2nd Revision (1996), Holography Handbook.

Typically stable holographic materials are illustrated in US Pat. No. 3,894,756. The encoded hologram may be formed in an element, for example, a security ID card. In order to decode the encoded hologram, a complex beam-unscrambling device must be used. When the beam is illuminated on the encoded hologram, an image can be formed and shown. Another safety system is described in US Pat. No. 4,140,373. In this reference, overlapping holograms are applied to the desired layer, one of which overlapping holograms can only be seen by coherent light (eg laser light). When such coherent light is applied, so-called invisible holograms can be seen. US Pat. No. 4,400,616 describes another safety system in which an identity card can be made, for example by laminating one or more flat transparent wave-guide holograms to a support. By placing a diffraction grating on the resultant article, the diffraction grating accommodates a particular wavelength and the desired image can be illuminated. Another reference describing a system and method for identifying encoded holograms is US Pat. No. 5,825,475. In this particular invention, holograms are recorded on a substrate using light of a particular wavelength. By shining the hologram on light of a particular wavelength, an image can be seen.

As can be seen from perusing many of these prior art documents, the manufacture, production, and sale of articles comprising so-called concealed holograms involves a number of steps, complex equipment, and watch viewing devices. It's a complex process. Each element must be produced separately, which is an expensive process.

Newer and improved systems for producing so-called hidden holograms have recently been invented. In such a system, a photosensitive resist layer is used. A portion of the photosensitive layer is masked and the primary hologram (visible incoherent white light) is imaged in the unmasked area. The mask is then removed and imaged in areas where no other holograms (visible coherent laser light) are exposed. Now that two holograms have been applied to this layer, one cannot be seen directly by standard lighting methods, but coherent light at a 90 ° angle to a clock surface (eg a white reflective surface such as a white cardboard). Can be seen by reflecting. While these unique and useful systems can produce safe-type concealed holograms, there is still no way to commercialize the process for widespread use throughout the industry.

1 is a plan view showing one of the flat surfaces of the cardboard support of the present invention prior to laminating a metallized holographic image on the flat surface of the cardboard support.

FIG. 2 is a side view of the cardboard support of FIG. 1 showing a cardboard support stacked on a polymeric support comprising a metallized holographic image and before being laminated to the cardboard support; FIG.

3 is a side view showing the cardboard support of FIGS. 1 and 2 with the holographic image remaining on the polymeric support itself after the metalized holographic image has been transferred from the polymeric support to the cardboard support;

4 shows a schematic process of laminating a metallized holographic image to a cardboard support;

FIG. 5 shows a schematic process of separating the polymeric substrate from the cardboard support as shown to produce the metallized holographic image of FIG. 3. FIG.

FIG. 6 is a view of an element provided on a cardboard support comprising a holographic image, in which case the figure has a new holographic image with the outer side of the cigarette pack provided on the cardboard support. Shows a pack of cigarettes made of a typical cardboard support, in which two holographic images are added, one seen because of the non-coherent {e.g., room} light, and the other The graphical image is a schematic drawing schematically shown in dashed lines in this drawing.

FIG. 7 is a diagram of a process in which coherent light can be projected onto a holographic image provided on a cardboard support subjected to the process of FIG. 5, reflecting the holographic image hidden on a white substrate at an angle of 90 ° to the cardboard support. A diagram showing the process of making it.

<Explanation of symbols for main parts of drawing>

1,31: cardboard support 2,32: holographic image

3: metalized image 4: polymer support

5: unwinding roll 6,7: counter roller

9: coating pan 11,12,24,25: dryer

13,14: heating roller 16: sandwich material

22,23 coating head 28: cigarette box

29: cigarette 30: lid

33: star shape 34: handheld sauce

35,36: Ray 38: Carton

There is a need to manufacture, produce, and sell materials including hidden holograms to prevent fraud. Counterfeit elements, such as tobacco and other goods, for example, are currently sold worldwide, with considerable damage to producers and sellers. Among many other items, it would be easy to track the counterfeit if there was a simple and easy way to add a hidden hologram in the cardboard item used to contain such an item. Accordingly, it is an object of the present invention to repeatedly add a hologram concealed on cardboard material used to contain various elements in a cost effective manner.

This and other objects are achieved with a holographic element comprising a cardboard support having two flat surfaces, one of which is

a. Adhesive layer, and

b. With a holographic image that has been metalized in turn,

The metallized holographic image includes at least two holograms in it, one of the holograms can only be seen by incoherent light, and the other of the holograms can only be seen by coherent light, The holographic image of is formed on the photosensitive element on the polymer support by at least two image processing steps, and then the holographic image is metallized and then coated with an adhesive, whereby a temperature between 0 ° and 150 ° C and per square inch The metallized holographic image is subsequently transferred from the polymer support to the cardboard support by laminating an adhesive layer coated on the metallized holographic image to the cardboard support at a pressure of at least 1 pound (70.2 g / cm ² ). Then metallization of the holographic image For the whole of the part from the cardboard support of the carton it is substantially transferred to the support and releasing the polymer support alone reuse a graphic image leaves on a suitable polymer support.

In the process of the present invention, a photosensitive polymer support is produced and at least two holographic images are located within the photosensitive polymer support. After masking over a portion of the photosensitive layer included on the photosensitive support, the first holographic image can be positioned on the photosensitive polymer support in a conventional manner. After removal of the photomask, a second holographic image is added to the unexposed areas of the photosensitive layer. The two holographic images are then metallized and then transferred to the cardboard support, which is first coated with an adhesive layer. After separation, certain temperatures and pressures are required to transfer only the metalized portion of the holographic image while leaving the holographic image on the polymer support. Thus, the holographic image can be metal reprocessed for reuse.

Example

With particular reference now to the drawings, which show some preferred modes of the elements and processes of the present invention, FIG. 1 is a plan view showing one of the flat surfaces of the cardboard support of the present invention, indicated by reference numeral 1. Referring now to FIG. 2, reference number 1 is also a cardboard support, shown in side view, which element is positioned side by side with respect to the polymer support 4, which has a series of holographic images 2 above. The holographic image is metallized and the holographic image is shown as fine particles of the metal body 3. 3, this figure shows that the metallized image 3 is transferred to the cardboard support 1, leaving the holographic image on the polymer support. This image can then be reprocessed with metal and this metalized image is again transferred to another cardboard support.

4 is a schematic diagram of a process of laminating a metallized holographic image on a cardboard support. 4 shows a new process of the present invention in conjunction with FIG. In FIG. 4, a polymer support 4 comprising a holographic image that has been metalized above is shown to pull the unwind roll 5 in the nip formed by the opposing rollers 6, 7. have. In this figure, the roller 7 is for example a standard gravure-coating roll and the roller 6 is a typical backup roller. An inverted gravure printing doctor blade (to control the coating weight) is indicated by reference number 8 and a coating pan (containing standard adhesive solution) is indicated by reference number 9. Thus, the holographic image coated with the adhesive layer is conveyed through the dryers indicated by reference numerals 11 and 12 and then down conveyed to the heating rollers 13, 14. In the nip formed by these last two rollers, the cardboard support 1 is pulled out of the roller 15, which cardboard support is formed from the dry surface of the adhesive layer of the polymeric support comprising a holographic image of a metal treatment underneath. Contact. This step passes two supports (polymer 4 and cardboard 1) onto a chill roll 17 and then stacks them into a sandwich 16 which is wound on a rewind roll 18.

The separation process is shown in FIG. In this schematic view, the sandwich material 16 laminated from FIG. 4 is pulled out of the release roll 18 and taken through the nip of the two separation rollers 19, 20. The polymer substrate 2 is wound on a film rewind roll 21 (this material also includes a holographic image thereon and can be metal reprocessed and reused again). The cardboard support 1 with the metallized holographic image (not shown in the figure of FIG. 5) can now be pulled into the coating heads 22, 23. A barrier coating can then be applied on the metallized holographic image using this step. A barrier coating can be applied from the pan 42 to the nip of the coating heads 22 and 23. The coated image can then be passed through dryers 24 and 25, which is then cured on a cardboard support and the blocked holographic image is wound on roll 27. These rolls of holographic imaged cardboard are now ready for use primarily as safety packaging for other materials.

A typical example of the use of a cardboard comprising the holographic image produced by the present invention is shown in FIG. 6. In this particular figure, reference numeral 28 is a typical pack of cigarettes comprising a plurality of cigarettes, for example indicated by reference numeral 29. The lid 30 of the pack of cigarettes is shown open to reveal the tobacco contained therein. Cigarette pack 28 has a visible holographic image 32, which can be seen as it is under white visible light and can add several advertising logos or simply eye-catching images. . A hidden holographic image or image also placed on this cardboard support is invisible under white light but can be seen under coherent light (eg laser light). In this particular figure, this image 33 is shown using dashed lines. Thus, cigarettes made by the manufacturer may include such hidden holographic images that can prevent forgery of the cigarettes.

In order to observe the holographic inclusions hidden on the cardboard support of the present invention, it is necessary to look at FIG. In this figure, the cardboard support comprising the holographic image included above is indicated by reference numeral 31 and the visible holographic image of white light is indicated by reference numeral 32. The hidden holographic image is shown in dotted lines as star shape 33. Laser light from the handheld source 34 impinges the light beam 35 on the hidden holographic image 33, which is reflected by the light beam 36 on the white plate or cardboard 38. Thus, the hidden holographic image can be seen as a complete star shape 39 reflected on this plate.

The process of transferring the holographic image from the polymer support to the cardboard support is carried out at a temperature of 0 ° to 150 ° C. and a pressure of at least 1 pound per square inch (70.2 g / cm ² ). Between the nips of the rollers 6, 7 shown in FIG. 4, temperatures between 30 ° and 125 ° C. and elevated temperatures between 5 (351) and 10 pounds (702 g / cm ² ) are preferably applied. The temperature should not be higher than 150 ° C. so as not to damage the holographic image included in the polymer roller. Therefore, the condition of the dryer should not exceed this temperature. This temperature can be controlled by simply designing the length of the dryer and the web speed of the elements passing through the dryer. The purpose of the cooling roller 17 is to form an adhesive and to ensure that the holographic image on the cardboard support and the polymer support 4 is safe. Adhesive materials are well known in the coating art and can be applied in coating weights ranging from 0.5 (35.1) to 14 (982.8 g / cm ² ) pounds (dry weight) per ream of cardboard, the lead having a size of 24 It was considered to correspond to approximately 500 sheets of cardboard (60.96) x 36 inches (91.44 cm). The metallized holographic image can be transferred to both sides of the cardboard support 1. The adhesive layer is first applied over the metallized holographic image. The cardboard support 1 then comes into contact with and adheres to this layer in the head nip roller.

When the two supports (polymer 4 and cardboard 1) are separated according to the process shown in FIG. 5, the metallized holographic image is transferred from the polymer supports 4 to the cardboard supports 1. This step is accomplished by separating the two supports. Since the adhesive layer will stick more strongly to the cardboard support, the cardboard support will be pulled along the metallized holographic image. They can then be coated with a suitable barrier layer, which in fact is desirable. Such barrier layers may mainly comprise conventional materials such as, for example, acrylics based on solubilizers or aqueous solutions, which layers may or may not be dyed if desired.

Cardboard support elements also vary in merchandise. For example, if you wish to have a number of holographic images (some shown only for safety purposes) on cardboard, mainly useful for containers for various articles, between 80 (5616) and 300 pounds (21060 g / cm ² ) per year {Preferably between 120 (8424) and 240 pounds (16848 g / cm ² ) per year), the kit being 500 sheets of cardboard having a size of 24 (60.96) x 36 inches (91.44 cm). Another definition of cardboard or board stock used in the art is a point system with a useful board stock ranging from 8 to 24 points. Such cardboard is particularly useful because of its low weight and thus can be used to include a number of components such as tobacco and the like. Since some holographic images are hidden from the normal view (eg under incoherent white light), so-called hidden holographic images can be seen under coherent light (eg laser). As such, these materials are very useful for safety purposes and thus counterfeiting can be prevented. Cardboard comprising the holographic images described in the present invention can be used primarily in techniques including gift boxes, storage items, decorative containers, and food products including advertising. The ability to add a secure holographic image onto the surface can be used exclusively for any technology and thus improve the quality of use.

As is well known to those skilled in the art and as described in the prior art listed in the present invention, holographic images can be added to multiple photosensitive layers such as silver halides, photoresists and the like. Such photosensitive layers can be applied on a number of polymer supports, among others, polyethylene, polypropylene, and polyethylene terephthalate. Such substrates are generally 0.03 to 4.0 millimeters in thickness.

Prior to the present invention, it was not known that such holographic images could be transferred as such, and in relation to a number of metallized holographic images, the elements described herein were dried adhesively laminated and then the elements separated. The ability to do this represents a unique process. The process described here uses some unique equipment designed to hold, stack, and then separate some fairly thin materials. It is necessary to ensure that all elements of the process are carefully maintained within process limits. The use of elements produced within the scope of the present invention greatly increases the usefulness of holographic images to be commercially beneficial.

Preferred polymer supports are T-BOSS, available from Applied Extrusion Technologies, Piabody, Massachusetts.

Claims (1)

In a holographic element comprising a cardboard support having two flat surfaces, one of the surfaces is: c. Adhesive layer, and d. With a holographic image that has been metalized in turn, The metallized holographic image includes at least two holograms inside, one of the holograms can only be seen by non-coherent light, and the other of the holograms is exposed to coherent light. And the metallized holographic image is obtained from a plurality of holographic images formed on a photosensitive element coated on a polymer support by at least two image processing steps, and then the holographic The image is metallized and then coated with an adhesive, whereby the cardboard layer is coated with an adhesive layer coated on the metallized holographic image at a temperature between 0 ° and 150 ° C and a pressure of at least 1 pound per square inch (70.2 g / cm ² ). By laminating on a support, the metallized holographic image is subsequently imaged. Transfer from the polymer support to the cardboard support, and then suitable for separating the polymer support from the cardboard support that substantially transfers all of the metalized portion of the holographic image to the cardboard support and reusing the holographic image. Holographic element comprising a cardboard support characterized in that it remains on a polymeric support.