Method for the production of a multi-layer data medium with security inscriptions
AssigneeFasver
InventorsEric PHILIPPE, Didier ALBERNY-SICARD
Life of this patent
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Abstract
Disclosed is a method for the production of a multi-layer data medium by the hot rolling under pressure of a plurality of superimposed layers (12) having security inscriptions. Marking rolling is carried out on at least one layer to be marked (12a) covered with a marking film (20, 21) bearing inscriptions (22) in vitrophany applied in contact with the layer to be marked, then the marking film is separated from the layer to be marked, the latter having the security inscriptions.
Claims20
1/—Method for the production of a multi-layer data medium (19) by hot rolling under pressure of a plurality of superimposed layers (12) comprising at least one outer layer (12a) made of a least one thermoplastic material, said multi-layer data medium having inscriptions, named security inscriptions (25, 35, 38),
- the method comprising:
- at least one marking film (20, 21, 36, 37) is selected:
- suitable to being subjected to hot rolling under pressure, named marking rolling, with a layer, named layer to be marked (12a), of thermoplastic material of said plurality of superimposed layers forming the data medium, said layer to be marked being covered with the marking film during said marking rolling,
- comprising a surface, named contact surface (23), bearing inscriptions (22, 34) in vitrophany corresponding to said security inscriptions (25, 35, 38) and being suitable for marking said layer to be marked following marking rolling of the marking film and of said layer to be marked, said contact surface and said inscriptions in vitrophany being in contact with said layer to be marked,
- suitable for being separated from said layer to be marked after marking rolling, the security inscriptions being formed on said layer to be marked,
- marking rolling of at least one layer to be marked covered with such a marking film (20, 21, 36, 37) is carried out, said inscriptions in vitrophany being in contact with said layer to be marked,
- the marking film (20, 21, 36, 37) is then separated from said layer to be marked (12a), the latter having said security inscriptions (25, 35, 38).
2/—Method according to claim 1, wherein the layer to be marked (12a) is an outermost layer of said plurality of superimposed layers (12), which is intended to form a free outermost surface (17, 18) of the multi-layer data medium (19), and wherein said marking rolling is said hot rolling under pressure of said plurality of superimposed layers, the marking film (20, 21) being placed in contact with the layer to be marked during this hot rolling under pressure, said free outermost surface of said medium bearing said security inscriptions after said hot rolling under pressure.
3/—Method according to claim 1, wherein marking rolling is carried out before said hot rolling under pressure of said plurality of superimposed layers (12), the layer to be marked (12a) being marked with said security inscriptions (25, 35, 38) and integrated in said plurality of superimposed layers (12) before said hot rolling under pressure of said plurality of superimposed layers is carried out.
4/—Method according to claim 1, wherein a marking film (20, 21) is selected having, as inscriptions in vitrophany, relief patterns (22, 34) in vitrophany corresponding to security inscriptions (25, 35) formed of relief patterns.
5/—Method according to claim 4, wherein
- a marking film (20, 21) is selected having a surface (23), named the contact surface, bearing said relief patterns in vitrophany formed by imprinting of a varnish on the contact surface, said contact surface (23) and said varnish being selected so that said relief patterns in vitrophany remain fixedly attached to the marking film after marking rolling and separation of the marking film from said layer to be marked,
- the relief patterns in vitrophany are selected from among relief patterns imprinted on the contact surface (23) with said varnish, and embossed relief patterns on the surface of a layer of said varnish imprinted on the contact surface (23).
6/—Method according to claim 5, wherein said imprinting of varnish with an ultraviolet-drying varnish composition comprising at least one agent promoting adhesion of the varnish to said contact surface (23).
7/—Method according to claim 4, wherein the relief patterns (23, 24) in vitrophany are selected from among relief patterns having at least two different surface conditions respectively corresponding to at least two different glossiness values of said security inscriptions, and relief patterns in vitrophany suitable for forming at least one holographic pattern.
8/—Method according to claim 1, wherein a marking film is selected, having as inscriptions (38) in vitrophany, at least one varnish impression suitable for being transferred by said marking rolling to said layer to be marked, said transferred inscriptions (38) in vitrophany constituting said security inscriptions (38).
9/—Method according to claim 8, wherein at least one varnish imprint is selected from among an imprint of a reflecting metallised varnish and an imprint of a varnish which is photoluminescent under illumination by light radiation outside the visible range.
10/—Method according to claim 1, wherein each layer (12) of said plurality of superimposed layers is formed of at least one thermoplastic material selected from the group of polycarbonates, PVCs, synthetic papers, mixtures and associations thereof, and wherein a polyester marking film (20, 21, 36, 37) is selected.
11/—Multi-layer data medium able to be obtained by a method according to claim 1, having inscriptions, named security inscriptions (25, 35, 38), formed of a plurality of superimposed layers rolled with respect to each other, comprising at least one layer of at least one thermoplastic material, the multi-layer data medium comprising security inscriptions selected from among relief patterns having different levels of glossiness;
- holographic patterns;
- reflecting metallised patterns;
- and patterns which are photoluminescent under light radiation outside the visible range, each layer (12) of said plurality of superimposed layers being formed by at least one thermoplastic material selected from the group of polycarbonates.
12/—Data medium according to claim 11, further comprising security inscriptions formed on at least one of its free outer surfaces (17, 18).
13/—Official document comprising a data medium according to claim 11.
14/—Method according to claim 2, wherein marking rolling is carried out before said hot rolling under pressure of said plurality of superimposed layers (12), the layer to be marked (12a) being marked with said security inscriptions (25, 35, 38) and integrated in said plurality of superimposed layers (12) before said hot rolling under pressure of said plurality of superimposed layers is carried out.
15/—Method according to claim 2, wherein a marking film (20, 21) is selected having, as inscriptions in vitrophany, relief patterns (22, 34) in vitrophany corresponding to security inscriptions (25, 35) formed of relief patterns.
16/—Method according to claim 3, wherein a marking film (20, 21) is selected having, as inscriptions in vitrophany, relief patterns (22, 34) in vitrophany corresponding to security inscriptions (25, 35) formed of relief patterns.
17/—Method according to claim 5, wherein the relief patterns (23, 24) in vitrophany are selected from among relief patterns having at least two different surface conditions respectively corresponding to at least two different glossiness values of said security inscriptions, and relief patterns in vitrophany suitable for forming at least one holographic pattern.
18/—Method according to claim 6, wherein the relief patterns (23, 24) in vitrophany are selected from among relief patterns having at least two different surface conditions respectively corresponding to at least two different glossiness values of said security inscriptions, and relief patterns in vitrophany suitable for forming at least one holographic pattern.
19/—Method according to claim 2, wherein a marking film is selected, having as inscriptions (38) in vitrophany, at least one varnish impression suitable for being transferred by said marking rolling to said layer to be marked, said transferred inscriptions (38) in vitrophany constituting said security inscriptions (38).
20/—Method according to claim 3, wherein a marking film is selected, having as inscriptions (38) in vitrophany, at least one varnish impression suitable for being transferred by said marking rolling to said layer to be marked, said transferred inscriptions (38) in vitrophany constituting said security inscriptions (38).