EP0229645B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for producing an antifalsification paper with an incorporated security element
Assignee: GAO Gesellschaft fuer Automation und Organisation mbH
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Filing: 1987-01-09
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Granted: 1991-05-15
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Expires: 2007-01-09
Abstract
Abstract To produce a security paper with an embedded security feature (7) therein in the form of a thread, band or the like, a first layer of paper (3) and a second layer of paper (5) in a second papermaking machine are produced and the security feature (7) is inserted in a defined position between these layers (3, 5). After this, these are pressed together and dried. The individual paper layers (3, 5) can be provided with watermarks (9) or apertures (10, 11) at specific locations with respect to the thread (7), whereby the thread can be specifically exposed at pre-determined positions. <IMAGE>
Inventors
- 👤 Walter Dr. Schneider
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 02:56
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/42; D21F; D21F1/00; D21F1/44; D21F11/00; D21F11/06; D21F11/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
185 words
Process for producing an anti-falsification paper with a security element embedded in the paper in the form of a thread or strip, the security element being present at least locally in regions of minimum paper thickness or at the surface of the paper, characterised in that - a first layer of paper is formed in a first wet end of a paper machine, and is released from the cloth by means of a removal band, - a second paper layer is formed on a second wet end of a paper machine, - one or both paper layers have at least local regions of reduced thickness amounting to up to 30% of the total thickness of both layers, - the first paper layer is transported by means of the removal belt on to the second paper layer and brought into intimate contact with it, the security element being introduced between the paper layers in such a way that it is arranged in the regions of low paper thickness or openings in one or both paper webs, - the combined paper webs are together calendered and dried.
Claim 2
Dependent Claim
185 words
Process for producing an anti-falsification paper with a security element embedded in the paper in the form of a thread or strip, the security element being present at least locally in regions of minimum paper thickness or at the surface of the paper, characterised in that - a first layer of paper is formed in a first wet end of a paper machine, and is released from the cloth by means of a removal band, - a second paper layer is formed on a second wet end of a paper machine, - one or both paper layers have at least local regions of reduced thickness amounting to up to 30% of the total thickness of both layers, - the first paper layer is transported by means of the removal belt on to the second paper layer and brought into intimate contact with it, the security element being introduced between the paper layers in such a way that it is arranged in the regions of low paper thickness or openings in one or both paper webs, - the combined paper webs are together calendered and dried.
Claim 3
Dependent Claim
51 words
Process according to claim 1 characterised in that the regions of low thickness in the or each paper layer are produced by regions printed in relief on the cloth or regions on the cloth of deliberately reduced water permeability, the deposition of fibres in these regions being reduced or entirely suppressed.
Claim 4
Dependent Claim
53 words
Process according to claim 1 characterised in that at least one of the two paper layers is treated with a stream of air or water during the formation of the sheet or shortly afterwards in such a way that deliberate local compression of the fibres is achieved, to the point of forming holes.
Claim 5
Dependent Claim
24 words
Process according to claim 1 characterised in that the two paper layers are produced with different thicknesses, preferably in the ratio of 1: 4.
Claim 6
Dependent Claim
23 words
Process according to claim 1 characterised in that at least one of the two paper layers is produced on a cylinder screen machine.
Claim 7
Dependent Claim
20 words
Process according to claim 1 characterised in that periodically repeating watermark regions or holes are introduced into both paper layers.
Claim 8
Dependent Claim
39 words
Process according to claim 6 characterised in that the watermarks of the one layer of paper are formed with regard to the thick and thin regions of paper to be complementary to the watermarks of the other paper layer.
Claim 9
Dependent Claim
53 words
Process according to claim 6 characterised in that the watermarks or holes of both paper layers are arranged over one another when the layers are brought together so that the thick regions of the watermarks of the one paper layer lie over the corresponding thin regions or holes of the other paper layer.
Claim 10
Dependent Claim
39 words
Process according to claim 6 characterised in that the two paper layers are brought together so that the watermarks or holes of the one paper layer come to lie between the watermarks or holes of the other paper layer.
Claim 11
Dependent Claim
36 words
Process according to claim 1 characterised in that the regions of low thickness in the paper webs are formed as simple geometric patterns, in particular in the form of substantially rectangular, round or elliptical surface regions.
Claim 12
Dependent Claim
47 words
Process according to one or more of the foregoing claims characterised in that further paper machines are connected to the first and second paper machines and that further security elements are introduced between the individual machines into the paper web which is made up of several layers.
Claim 13
Dependent Claim
29 words
Process according to claim 11 characterised in that the security elements between the different paper layers are arranged alongside and/or over one another and/or that the security elements intersect.
References Cited (Backward Citations)
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