According to the exemplary embodiment shown in
A detail of the cutting cylinders with the cutting patterns is shown in
The device shown in
The planchettes are manufactured as follows: the paper sheet is unwound, the upper side is printed with fluorescent inks in an amount of 3 g/m2, in order to make a pattern representing a flag, the sheet is turned over by means of the turn-over bars and with front/back registration, and the other side is printed with the same pattern. The printing is dried by a UV radiation device. Other drying devices, for example hot-air or infrared drying devices, could be used.
The sheet is conveyed to the cutting device. It passes between the cutting cylinder (3a) and the anvil cylinder (3c) so as to deeply cut “right through” the paper according to the pattern borne by said cylinder (3a), it continues its path between the anvil cylinder (3c) and the cutting cylinder (3b) so as to deeply cut “right through” the paper according to the pattern borne by said cylinder (3b), which pattern crosses the first cutting pattern so as to form a detached element in the form of a disk. The screws (3e) make it possible to synchronize the cutting-plate-holder rolls so that the cutting threads form the pattern appropriately. The device allows a multitude of disks to be cut continuously from the sheet. The elements detached from the sheet (the disks) are recovered from the sheet by a stripping device using a peel bar and suction (4) and are then packaged.
Examples of cutting patterns according to the invention which may intersect to form a detachable resulting pattern, and also the resulting pattern, are presented in
The invention also aims to protect a security or decorative element of relatively small size, such as a security or decorative planchette, obtained using the manufacturing and/or cutting methods described above. The term “security element” is understood to mean any element for the purpose of providing security, such as the security elements conventionally used in security papers (papers of value, such as bank notes, checks, coupons, restaurant tickets or identity papers) but also those for other applications of security-protected papers associated with the hygiene and/or the medical field and/or associated with traceability, with the safety of personnel, such as for example in order to indicate a specific event, such as a date of expiry.
One use of the decorative elements may be to include them in sheets, especially paper sheets, in order to produce sheets with a decorative effect.
Preferably, said element has a thickness of between 50 and 110 μm.
More particularly, the invention aims to protect a security element obtained using the manufacturing and/or cutting methods described above and which includes identification patterns observable to the naked eye.
According to one particular embodiment, said security element includes patterns chosen from patterns that are visible in natural light or visible under UV light, that are luminescent, particularly fluorescent or phosphorescent, that are detectable by near or medium infrared radiation, that are thermochromic or piezochromic, that are based on DNA traces, that are optically variable, especially iridescent, or based on liquid crystals or on diffraction gratings or on moiré patterns or holograms, or that are electromagnetic, or combinations thereof.
More particularly, said security element includes, beneath or alongside said patterns, printing of electromagnetic, especially magnetic, character and in particular continuous tracks or codes in the form of magnetic bits.
According to one particular embodiment, said security element includes chemical authentication reactants or reactants that reveal a specific event. A specific event, it was mentioned above that this may for example be a date of expiry. It may also act as evidence of a break in a cold chain or evidence of sterilization.
The object of the invention is also to protect a security element as described above, the shape of said element (after being cut) being a security (authenticating) characteristic. This is because the elements may have novel and/or complex shapes that cannot be achieved with the prior techniques.
The object of the invention is also to protect a sheet having a fibrous substrate which includes said security or decorative element of relatively small size. In particular, the element includes a wetting agent and/or heat-sealing lacquer facilitating its incorporation and its retention in the fibrous substrate. The fibrous substrate may especially be obtained by a papermaking process starting from a suspension in aqueous medium of cellulose and/or synthetic fibers to which the elements of relatively small size have been added, using the known techniques for the planchettes of the prior art.
The invention therefore provides a security sheet that includes the security element as described above.
The invention also provides a decorative sheet that includes a decorative element obtained using the methods described above.
The sheet with said element may therefore be a conventional security sheet such as, for example, a bank note paper sheet or a check paper, but also security-protected sheet, that is to say a sheet for labels or a sheet for the medical or hospital fields.
The invention also relates to packaging that includes such a sheet with said element.
The invention also relates to a security document comprising, as base, a sheet having a fibrous substrate that includes at least one security element of relatively small size as described above.
This security document may for example be a bank note, a check, a restaurant ticket, a lottery ticket or a ticket for entry to cultural or sporting events.
The invention also provides a method of authenticating a security sheet, document or article that includes an element of small size as described above, using the shape of said element after it has been cut as security (authentication) characteristic. The shape may be recognized by the naked eye or by an optical recognition device, which may also make it possible to compare the observed shape with the reference shape stored in a memory of the device.
Number | Date | Country | Kind |
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0401329 | Feb 2004 | FR | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/FR05/00335 | 2/11/2005 | WO | 00 | 7/2/2007 |