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EP 1 975 311 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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31.05.2017 Bulletin 2017/22 |
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Date of filing: 28.11.2006 |
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International Patent Classification (IPC):
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International application number: |
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PCT/CN2006/003191 |
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International publication number: |
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WO 2007/065346 (14.06.2007 Gazette 2007/24) |
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ANTI-FALSIFICATION WATERMARK PAPER AND METHOD OF MAKING SAME
PAPIER MIT EINEM FÄLSCHUNGSSICHEREN WASSERZEICHEN UND HERSTELLUNGSVERFAHREN DAFÜR
PAPIER EN FILIGRANE ANTIFALSIFICATION ET SON PROCEDE DE FABRICATION
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Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE
SI SK TR |
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Priority: |
09.12.2005 CN 200510111320
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Date of publication of application: |
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01.10.2008 Bulletin 2008/40 |
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Proprietor: China Banknote Printing and Minting Corporation |
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Beijing 100044 (CN) |
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Inventors: |
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- AN, Shuanyin
Beijing 100044 (CN)
- WANG, Duyi
Beijing 100044 (CN)
- LIU, Wenquan
Beijing 100044 (CN)
- WEN, Daxing
Beijing 100044 (CN)
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Representative: Legg, Cyrus James Grahame et al |
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Abel & Imray
20 Red Lion Street London WC1R 4PQ London WC1R 4PQ (GB) |
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References cited: :
EP-A2- 0 687 771 DE-C- 498 249 JP-A- 08 246 375 US-A- 1 362 598 US-A1- 2005 039 846
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CN-C- 1 083 511 JP-A- 06 264 392 JP-A- 11 152 695 US-A- 5 766 416
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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FIELD OF INVENTION
[0001] The present invention relates to paper for manufacturing currency or the like. More
particularly, relates to an anti-falsification watermark paper and its manufacturing
method.
BACKGROUND OF INVENTION
[0002] It is well known that watermarks are usually used on important papers, for example,
paper money, security paper, certificate paper, note paper, each of which consists
of watermark used to prevent it from forgery. Watermark is normally formed by the
difference of paper brightness and darkness, when a viewer observes paper patterns
against light, different light penetrating rate results the pattern of the watermark.
Conventional methods for making watermark can be concluded as follows:
- 1. Pressing convex and/or concave patterns on papermaking forming wires. During the
process of papermaking, pulp amount relatively increases or decreases at the patterns
positions due to the existence of the intaglio and gravure, which results different
distribution of fiber amount in paper.
- 2. Varying partial water penetration via welding, weaving or agglutination on forming
wires. The pulp amount on corresponding positions is relatively less due to worse
filtration of water so as to realize uneven distribution of fibers.
[0003] The conventional watermark making methods mentioned above has the following defects:
- 1. Uneven fiber distribution results less fibers exist at particular areas of a paper
and reduces the strength of this area. Especially for highlight watermark patterns,
the paper strength is extremely low.
- 2. The watermarks are not clear enough.
[0004] EP 0 687 771 discloses making security paper by wet embossing paper with a moisture content in
the range 50 to 65%, preferably 60 to 65%.
[0005] US 2005/0039846 discloses making an air laid absorbent sheet. A dry web of fibres is deposited on
a foraminous web, which is then compacted and then embossed with a hard rubber roller
having a durometer hardness from about 50 to about 100.
SUMMARY OF INVENTION
[0006] The object of the invention is to provide a new manufacturing method of making an
anti-falsification watermark paper while addressing the above existent defects.
[0007] In order to doing so, the present invention uses the solution as follows: a method
for manufacturing an anti-falsification watermark paper, the moist paper is dried
till the water content is 10%-25%, then partial or full surface of the paper is pressed
by rolls or plane plates with convex patterns, concave patterns or combination of
convex and concave patterns roll to form watermarks. The pressure is 50N-1.5KN/cm
when pressing the paper. Patterns are formed directly or indirectly on the surfaces
of pressing rolls or on the plane plates.
[0008] A method for manufacturing an anti-falsification watermark paper, comprising the
steps of stock beating, pulp refining, forming, pressing and drying, wherein further
comprises pressing partial or full surface of the paper by rolls with convex patterns,
concave patterns or combination of convex and concave patterns roll to form watermarks.
When drying the moist paper, water content is controlled between 10%-25%. The pressure
is 50N-1.5KN/cm when pressing the paper. Patterns are formed directly or indirectly
on the surfaces of pressing rolls or on the plane plates.
[0009] An anti-falsification watermark paper, when observing the anti-falsification paper
against light, bright and shade variation of watermark patterns can be seen. Light
or shade strips with the width less than 0.3mm are contained in the patterns of the
paper. Transition of the light and shade parts is continuous and smooth.
[0010] An apparatus for manufacturing an anti-falsification paper, comprising a drive system
and a pressure applying system. The drive system is connected with a pair of rolls
with convex patterns, concave patterns or a combination of convex and concave patterns
on partial or full surface. Wherein the surface material of one of the rolls is plastic
or rubber whose shore A hardness is more than 99.
[0011] The apparatus anti-falsification may also be configured as follows: the drive system
is connected with a roll and the pressure applying system is connected with a plane
plate. Convex patterns, concave patterns or a combination of convex and concave patterns
is made on partial or full surface of the plane plate and the roll. The surface materials
of at least one of the plane plate or the roll is plastic or rubber whose shore A
hardness is more than 99.
[0012] The apparatus anti-falsification may also be configured as follows: the pressure
applying system is connected with two corresponding plane plates with convex patterns,
concave patterns or a combination of convex and concave patterns on partial or full
surfaces. The surface material of at least one of the plane plates is made of plastic
or rubber whose shore A hardness is more than 99.
BREIF DESCRIPTIONS OF DRAWINGS
[0013] The features and nature of the invention will now be described in more detail with
reference to the exemplary embodiments accompany with the drawings, in which:
Fig. 1 is a schematic illustration of the process of manufacturing an anti-falsification
watermark paper according to the present invention.
Fig. 2 is a schematic illustration of the structure of the apparatus for manufacturing
an anti-falsification watermark paper according to the first embodiment of the present
invention.
Fig. 3 is a schematic illustration of the structure of the apparatus for manufacturing
an anti-falsification watermark paper according to the second embodiment of the present
invention.
Fig. 4 is a schematic illustration of the structure of the apparatus for manufacturing
an anti-falsification watermark paper according to the third embodiment of the present
invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0014] Referring to Fig. 1. The manufacturing method of making an anti-falsification watermark
paper according to the present invention comprises the step of: preparing pulp (1);
shaping on mould wires (2); pressing (3); predrying (4); making watermarks (5); drying
(6); and subsequent procedures (7). The step of making watermarks (5) further comprises
the following steps:
- a. Predrying the moist paper made on a sheet former or a paper machine. Water content
is controlled to between 10%-25% when predrying the moist paper.
- b. Pressing the partial or full surface of the predried paper by rolls or plane plates
with convex patterns, concave patterns or a combination of convex and concave patterns
to form watermarks. When pressing the predried paper, the pressure applied on the
pressed area of paper is between 0.5Mpa to 100Mpa.
- c. After pressingmoist paper, drying the pressed paper.
[0015] When observing the anti-falsification watermark paper made according to the aforesaid
method against light. Watermarks with light and shade variation can be seen. The watermark
patterns contain light or shade strips with the width less than 0.3mm. The minimum
width of the strips can be 0.06mm. The transition of the light and shade parts is
continuous and smooth.
[0016] Regarding step b, the predried moist paper is pressed by a group of pressing devices
composed of rolls or plane plates. The components of the pressing devices can be two
rolls, one roll and one plane plate or two plane plates. Fig. 2, Fig. 3 and Fig. 4
illustrate different embodiments of the pressing devices.
[0017] The apparatus for manufacturing an anti-falsification watermark paper may be composed
of a drive system 100. The drive system 100 is connected with a pair of rolls 81 and
82 with convex patterns, concave patterns or a combination of convex and concave patterns
on partial or full surface of the rolls, as shown in Fig. 2. Wherein Fig. 2a shows
the condition that the patterns are made on roll 81, Fig. 2b shows the condition that
the patterns are made on roll 82, while Fig. 2c shows the condition that a combination
of convex and concave patterns are made on the rolls 81 and 82. The surface material
of one of the two rolls is made of plastic or rubber whose shore A hardness is more
than 99 (indicated by letter "A" in the figure).
[0018] The apparatus for manufacturing an anti-falsification watermark paper may be composed
of a drive system 100 and a pressure applying system 200. The drive system 100 is
connected with a roll 8 and the pressure applying system 200 is connected with a plane
plate 9, as shown in Fig. 3. Partial or full surface of the plane plate and the roll
has convex patterns, concave patterns or a combination of convex and concave patterns
roll. Wherein, Fig. 3a shows the condition that patterns are made on the roll 8, Fig.
3b shows the condition that patterns are made on the plane plate 9 and Fig. 3c shows
the condition that a combination of concave and convex patterns are made on the roll
8 and the plate 9. The surface material of at least one of the two components is made
of plastic or rubber whose shore A hardness is more than 99 (as indicated by letter
"A" in the figure).
[0019] The apparatus for manufacturing an anti-falsification watermark paper may be composed
of a pressure applying system 200, which is connected with two pieces of inter-corresponding
plane plates 91 and 92, on surfaces of which there are convex patterns, concave patterns
or a combination of convex and concave patterns, as shown in Fig. 4. Fig. 4a shows
a condition that the patterns are made on the plane plate 91 (patterns are at the
bottom of the plate, so they can't be seen). Fig. 4b shows a condition that patterns
are made on the plate 92 and Fig. 4c shows the condition that convex and concave patterns
are made on both plates 91 and 92. At least one of the above two plates is made of
plastic or rubber whose shore A hardness is more than 99 (as indicated by letter "A"
in the figure).
[0020] Raw materials for manufacturing the paper of the present invention should contain
more than 90% of plant fibers. Watermarks can be pressed on paper note, security paper,
credential paper and receipt paper according to the method of the present invention.
Subsequent process will be different according to different usage of paper.
[0021] The watermark manufacturing process will be explained in detail by the following
examples (Examples 2 and 3 falling within the claims):
Example 1:
[0022] A group of pressing rolls with concave and convex patterns are erected between drying
cylinders of a drying section on a paper machine. Moist paper of 50% water content
will be continuously dried after being pressed by the pressing rolls. The surfaces
of the pressing rolls are packed by rubber whose shore A hardness is 99. Convex patterns
are engraved on the surface of one of the rolls. When pressing, each one centimeter
length of paper bears a force of 50N. After being pressed, the paper will be processed
by post dryness, subsequent treatment and reel. When observing against transmission
light, half transparent patterns can be seen on the other side of the pressed paper.
Example 2:
[0023] Treat the bleached wood pulp paper to control the water content to be 10%, pressing
the paper with pressing rolls, of which the surface material has a shore Hardness
of rolls 82D. Concave and convex patterns are engraved by mechanical method on the
surface of one of the pressing rolls. Pressing the paper under a pressure as each
centimeter length of paper bears a force of 1.5 KN, then processing it by post dryness,
subsequent treatment and reel. After being pressed, the paper can be seen with formed
watermark patterns against light.
Example3:
[0024] Putting the paper of 25% water content between two pressing plates engraved with
concave and convex patterns thereon. Let the pattern side of the plates touch the
paper to be printed, pressing the plate to enable intensity of pressure on the pressed
area of the paper to be 80 Mpa. Paper with light and shade patterns can be formed
after the same post dryness and subsequent treatment.
[0025] One of the ordinary skilled in the art should realize that the present invention
shall not be considered as restricted to the aforedescribed and illustrated exemplary
embodiments. Various modification or variations can be made within the scope of the
following Claims.
INDUSTRIAL APPLICATION
[0026] Compared with conventional method of manufacturing an anti-falsification paper, the
present invention performs the step of pressing the moist paper by rolls or plane
plates with convex patterns, concave patterns or a combination of concave and convex
patterns on surfaces during the course of drying, instead of using traditional vat
formation process. It will not cause uneven distribution of fibers that may results
fiber amounts to decrease on partial area of the paper, which may reduce the strength
on partial area or bring poor clearness of watermark of the paper. To use the present
invention, the bright and shade lines of watermarks in the paper are less than 0.3mm
wide, and the transition between bright and shade layers of watermark area are smooth,
so as to improve the watermark clearness.
1. A method for manufacturing an anti-falsification paper, wherein the method comprises:
pressing (5) the partial or full surface of the paper by rolls or plane plates (81,82,8,9,91,92)
engraved with convex patterns, concave patterns or a combination of convex and concave
patterns after drying (4) the moist paper till the water content is 10%-25%.
2. The method of claim 1, wherein the applied pressure is 50N-1.5KN per cm-length when
pressing the moist paper.
3. The method of claim 1, wherein patterns are formed directly or indirectly on the surfaces
of the rolls or the plane plates.
4. The method of claim 1, wherein the surface material of one of the rolls or plane plates
is plastic or rubber, whose shore A hardness is more than 99.
5. The method of claim 1 comprising the previous steps of:
stock beating;
pulp refining;
shaping on mould wires (2);
6. The method of claim 5, wherein that the applied pressure is between 50N-1.5KN per
cm-length when pressing the moist paper.
7. The method of claim 5, wherein the patterns are formed directly or indirectly on the
surfaces of rolls or the plane plates.
8. The method of claim 5, wherein the surface material of one of the rolls or plane plates
is plastic or rubber, whose shore A hardness is more than 99.
9. An anti-falsification paper made according to the method of the above claims, characterized in that when observing the paper against light, watermark patterns with bright and shade
variations are visible, and the patterns contain light or shade strips with a width
of less than 0.3mm.
10. The anti-falsification paper of claim 9, wherein the minimum width of the strips is
0.06mm.
11. The anti-falsification paper of claim 9, wherein when observing the paper against
light, watermark patterns with bright and shade variations are visible, and the transition
between bright and shade parts in the watermark area is smooth.
1. Verfahren zur Herstellung eines fälschungssicheren Papiers, wobei das Verfahren Folgendes
umfasst:
Pressen (5) eines Teils der Oberfläche oder der vollständigen Oberfläche des Papiers
durch Walzen oder flache Platten (81, 82, 8, 9, 91, 92), in die konvexe Muster, konkave
Muster oder eine Kombination aus konvexen und konkaven Mustern eingraviert sind, nach
dem Trocknen (4) des feuchten Papiers, bis der Wassergehalt 10% - 25% beträgt.
2. Verfahren nach Anspruch 1, wobei der angelegte Druck beim Pressen des feuchten Papiers
50 N - 1,5 KN je cm Länge beiträgt.
3. Verfahren nach Anspruch 1, wobei Muster direkt oder indirekt auf den Oberflächen der
Walzen oder der flachen Platten gebildet werden.
4. Verfahren nach Anspruch 1, wobei es sich bei dem Oberflächenmaterial einer der Walzen
oder flachen Platten um Kunststoff oder Gummi handelt, dessen Shore-A-Härte größer
als 99 ist.
5. Verfahren nach Anspruch 1, umfassend die vorhergehenden Schritte des:
Schlagen des Materials;
Veredeln des Zellstoffs;
auf Formsieben (2) Formen.
6. Verfahren nach Anspruch 5, wobei der angelegte Druck beim Pressen des feuchten Papiers
zwischen 50 N - 1,5 KN je cm Länge liegt.
7. Verfahren nach Anspruch 5, wobei die Muster direkt oder indirekt auf den Oberflächen
von Walzen oder den ebenen Platten ausgebildet sind.
8. Verfahren nach Anspruch 5, wobei es sich bei dem Oberflächenmaterial einer der Walzen
oder ebenen Platten um Kunststoff oder Gummi handelt, dessen Shore-A-Härte größer
als 99 ist.
9. Fälschungssicheres Papier, das nach dem Verfahren der vorstehenden Ansprüche hergestellt
wurde, dadurch gekennzeichnet, dass beim Anschauen des Papiers gegen das Licht Wasserzeichenmuster mit hellen und schattigen
Variationen sichtbar sind, und die Muster Licht- oder Schattenstreifen mit einer Breite
von weniger als 0,3 mm aufweisen.
10. Fälschungssicheres Papier nach Anspruch 9, wobei die minimale Breite der Streifen
0,06 mm beträgt.
11. Fälschungssicheres Papier nach Anspruch 9, wobei beim Anschauen des Papiers gegen
das Licht Wasserzeichenmuster mit hellen und schattigen Variationen sichtbar sind
und der Übergang zwischen den hellen und den schattigen Teilen im Bereich des Wasserzeichens
weich ist.
1. Procédé de fabrication d'un papier anti-falsification, dans lequel le procédé comprend
:
le fait d'appuyer (5) sur la surface partielle ou complète du papier avec des rouleaux
ou des plaques planes (81, 82, 89, 91, 92) gravés avec des motifs convexes, des motifs
concaves ou une combinaison de motifs convexes et concaves après séchage (4) du papier
humide jusqu'à ce que la teneur en eau soit de 10 à 25%.
2. Procédé selon la revendication 1, dans lequel la pression appliquée est de 50 N à
1,5 KN par centimètre de longueur lors de la pression sur le papier humide.
3. Procédé selon la revendication 1, dans lequel les motifs sont formés directement ou
indirectement sur les surfaces des rouleaux ou des plaques planes.
4. Procédé selon la revendication 1, dans lequel le matériau de surface de l'un des rouleaux
ou de l'une des plaques planes est du plastique ou du caoutchouc, dont la dureté shore
A est supérieure à 99.
5. Procédé selon la revendication 1, comprenant les étapes précédentes de :
frappage du papier ;
raffinage de la pâte ;
mise en forme sur des moules (2).
6. Procédé selon la revendication 5, dans lequel la pression appliquée est comprise entre
50 N et 1,5 KN par centimètre de longueur lors de la pression sur le papier humide.
7. Procédé selon la revendication 5, dans lequel les motifs sont formés directement ou
indirectement sur les surfaces des rouleaux ou des plaques planes.
8. Procédé selon la revendication 5, dans lequel le matériau de surface de l'un des rouleaux
ou de l'une des plaques planes est du plastique ou du caoutchouc, dont la dureté shore
A est supérieure à 99.
9. Papier anti-falsification fabriqué selon le procédé décrit dans les revendications
ci-dessus, caractérisé en ce que, lors de l'observation du papier à la lumière, des motifs de filigranes à variations
claires et foncées sont visibles, et les motifs contiennent des bandes claires ou
foncées présentant une largeur inférieure à 0,3 mm.
10. Papier anti-falsification fabriqué selon la revendication 9, dans lequel la largeur
minimum des bandes est de 0,06 mm.
11. Papier anti-falsification fabriqué selon la revendication 9, dans lequel, lors de
l'observation du papier à la lumière, des motifs de filigranes à variations claires
et foncées sont visibles, et le passage entre les parties claires et foncées dans
la zone de filigrane est homogène.
![](https://data.epo.org/publication-server/image?imagePath=2017/22/DOC/EPNWB1/EP06828187NWB1/imgf0001)
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REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description